v4.19.13 snapshot.
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
new file mode 100644
index 0000000..d66ea75
--- /dev/null
+++ b/drivers/iio/light/Kconfig
@@ -0,0 +1,493 @@
+
+#
+# Light sensors
+#
+# When adding new entries keep the list in alphabetical order
+
+menu "Light sensors"
+
+config ACPI_ALS
+ tristate "ACPI Ambient Light Sensor"
+ depends on ACPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select IIO_KFIFO_BUF
+ help
+ Say Y here if you want to build a driver for the ACPI0008
+ Ambient Light Sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called acpi-als.
+
+config ADJD_S311
+ tristate "ADJD-S311-CR999 digital color sensor"
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ depends on I2C
+ help
+ If you say yes here you get support for the Avago ADJD-S311-CR999
+ digital color light sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called adjd_s311.
+
+config AL3320A
+ tristate "AL3320A ambient light sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Dyna Image AL3320A
+ ambient light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called al3320a.
+
+config APDS9300
+ tristate "APDS9300 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Avago APDS9300
+ ambient light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called apds9300.
+
+config APDS9960
+ tristate "Avago APDS9960 gesture/RGB/ALS/proximity sensor"
+ select REGMAP_I2C
+ select IIO_BUFFER
+ select IIO_KFIFO_BUF
+ depends on I2C
+ help
+ Say Y here to build I2C interface support for the Avago
+ APDS9960 gesture/RGB/ALS/proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called apds9960
+
+config BH1750
+ tristate "ROHM BH1750 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here to build support for the ROHM BH1710, BH1715, BH1721,
+ BH1750, BH1751 ambient light sensors.
+
+ To compile this driver as a module, choose M here: the module will
+ be called bh1750.
+
+config BH1780
+ tristate "ROHM BH1780 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here to build support for the ROHM BH1780GLI ambient
+ light sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called bh1780.
+
+config CM32181
+ depends on I2C
+ tristate "CM32181 driver"
+ help
+ Say Y here if you use cm32181.
+ This option enables ambient light sensor using
+ Capella cm32181 device driver.
+
+ To compile this driver as a module, choose M here:
+ the module will be called cm32181.
+
+config CM3232
+ depends on I2C
+ tristate "CM3232 ambient light sensor"
+ help
+ Say Y here if you use cm3232.
+ This option enables ambient light sensor using
+ Capella Microsystems cm3232 device driver.
+
+ To compile this driver as a module, choose M here:
+ the module will be called cm3232.
+
+config CM3323
+ depends on I2C
+ tristate "Capella CM3323 color light sensor"
+ help
+ Say Y here if you want to build a driver for Capella CM3323
+ color sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called cm3323.
+
+config CM3605
+ tristate "Capella CM3605 ambient light and proximity sensor"
+ depends on OF
+ help
+ Say Y here if you want to build a driver for Capella CM3605
+ ambient light and short range proximity sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called cm3605.
+
+config CM36651
+ depends on I2C
+ tristate "CM36651 driver"
+ help
+ Say Y here if you use cm36651.
+ This option enables proximity & RGB sensor using
+ Capella cm36651 device driver.
+
+ To compile this driver as a module, choose M here:
+ the module will be called cm36651.
+
+config IIO_CROS_EC_LIGHT_PROX
+ tristate "ChromeOS EC Light and Proximity Sensors"
+ depends on IIO_CROS_EC_SENSORS_CORE
+ help
+ Say Y here if you use the light and proximity sensors
+ presented by the ChromeOS EC Sensor hub.
+
+ To compile this driver as a module, choose M here:
+ the module will be called cros_ec_light_prox.
+
+config GP2AP020A00F
+ tristate "Sharp GP2AP020A00F Proximity/ALS sensor"
+ depends on I2C
+ select REGMAP_I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select IRQ_WORK
+ help
+ Say Y here if you have a Sharp GP2AP020A00F proximity/ALS combo-chip
+ hooked to an I2C bus.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gp2ap020a00f.
+
+config SENSORS_ISL29018
+ tristate "Intersil 29018 light and proximity sensor"
+ depends on I2C
+ select REGMAP_I2C
+ default n
+ help
+ If you say yes here you get support for ambient light sensing and
+ proximity infrared sensing from Intersil ISL29018.
+ This driver will provide the measurements of ambient light intensity
+ in lux, proximity infrared sensing and normal infrared sensing.
+ Data from sensor is accessible via sysfs.
+
+config SENSORS_ISL29028
+ tristate "Intersil ISL29028 Concurrent Light and Proximity Sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Provides driver for the Intersil's ISL29028 device.
+ This driver supports the sysfs interface to get the ALS, IR intensity,
+ Proximity value via iio. The ISL29028 provides the concurrent sensing
+ of ambient light and proximity.
+
+config ISL29125
+ tristate "Intersil ISL29125 digital color light sensor"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Intersil ISL29125
+ RGB light sensor for I2C.
+
+ To compile this driver as a module, choose M here: the module will be
+ called isl29125.
+
+config HID_SENSOR_ALS
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID ALS"
+ help
+ Say yes here to build support for the HID SENSOR
+ Ambient light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-sensor-als.
+
+config HID_SENSOR_PROX
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID PROX"
+ help
+ Say yes here to build support for the HID SENSOR
+ Proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-sensor-prox.
+
+config JSA1212
+ tristate "JSA1212 ALS and proximity sensor driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build a IIO driver for JSA1212
+ proximity & ALS sensor device.
+
+ To compile this driver as a module, choose M here:
+ the module will be called jsa1212.
+
+config RPR0521
+ tristate "ROHM RPR0521 ALS and proximity sensor driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build support for ROHM's RPR0521
+ ambient light and proximity sensor device.
+
+ To compile this driver as a module, choose M here:
+ the module will be called rpr0521.
+
+config SENSORS_LM3533
+ tristate "LM3533 ambient light sensor"
+ depends on MFD_LM3533
+ help
+ If you say yes here you get support for the ambient light sensor
+ interface on National Semiconductor / TI LM3533 Lighting Power
+ chips.
+
+ The sensor interface can be used to control the LEDs and backlights
+ of the chip through defining five light zones and three sets of
+ corresponding output-current values.
+
+ The driver provides raw and mean adc readings along with the current
+ light zone through sysfs. A threshold event can be generated on zone
+ changes. The ALS-control output values can be set per zone for the
+ three current output channels.
+
+config LTR501
+ tristate "LTR-501ALS-01 light sensor"
+ depends on I2C
+ select REGMAP_I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ If you say yes here you get support for the Lite-On LTR-501ALS-01
+ ambient light and proximity sensor. This driver also supports LTR-559
+ ALS/PS or LTR-301 ALS sensors.
+
+ This driver can also be built as a module. If so, the module
+ will be called ltr501.
+
+config LV0104CS
+ tristate "LV0104CS Ambient Light Sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build support for the On Semiconductor
+ LV0104CS ambient light sensor.
+
+ To compile this driver as a module, choose M here:
+ the module will be called lv0104cs.
+
+config MAX44000
+ tristate "MAX44000 Ambient and Infrared Proximity Sensor"
+ depends on I2C
+ select REGMAP_I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build support for Maxim Integrated's
+ MAX44000 ambient and infrared proximity sensor device.
+
+ To compile this driver as a module, choose M here:
+ the module will be called max44000.
+
+config OPT3001
+ tristate "Texas Instruments OPT3001 Light Sensor"
+ depends on I2C
+ help
+ If you say Y or M here, you get support for Texas Instruments
+ OPT3001 Ambient Light Sensor.
+
+ If built as a dynamically linked module, it will be called
+ opt3001.
+
+config PA12203001
+ tristate "TXC PA12203001 light and proximity sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ If you say yes here you get support for the TXC PA12203001
+ ambient light and proximity sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called pa12203001.
+
+config SI1133
+ tristate "SI1133 UV Index Sensor and Ambient Light Sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build a driver for the Silicon Labs SI1133
+ UV Index Sensor and Ambient Light Sensor chip.
+
+ To compile this driver as a module, choose M here: the module will be
+ called si1133.
+
+config SI1145
+ tristate "SI1132 and SI1141/2/3/5/6/7 combined ALS, UV index and proximity sensor"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Silicon Labs SI1132 or
+ SI1141/2/3/5/6/7 combined ambient light, UV index and proximity sensor
+ chips.
+
+ To compile this driver as a module, choose M here: the module will be
+ called si1145.
+
+config STK3310
+ tristate "STK3310 ALS and proximity sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say yes here to get support for the Sensortek STK3310 ambient light
+ and proximity sensor. The STK3311 model is also supported by this
+ driver.
+
+ Choosing M will build the driver as a module. If so, the module
+ will be called stk3310.
+
+config ST_UVIS25
+ tristate "STMicroelectronics UVIS25 sensor driver"
+ depends on (I2C || SPI)
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select ST_UVIS25_I2C if (I2C)
+ select ST_UVIS25_SPI if (SPI_MASTER)
+ help
+ Say yes here to build support for STMicroelectronics UVIS25
+ uv sensor
+
+ To compile this driver as a module, choose M here: the module
+ will be called st_uvis25.
+
+config ST_UVIS25_I2C
+ tristate
+ depends on ST_UVIS25
+ select REGMAP_I2C
+
+config ST_UVIS25_SPI
+ tristate
+ depends on ST_UVIS25
+ select REGMAP_SPI
+
+config TCS3414
+ tristate "TAOS TCS3414 digital color sensor"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ If you say yes here you get support for the TAOS TCS3414
+ family of digital color sensors.
+
+ This driver can also be built as a module. If so, the module
+ will be called tcs3414.
+
+config TCS3472
+ tristate "TAOS TCS3472 color light-to-digital converter"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ If you say yes here you get support for the TAOS TCS3472
+ family of color light-to-digital converters with IR filter.
+
+ This driver can also be built as a module. If so, the module
+ will be called tcs3472.
+
+config SENSORS_TSL2563
+ tristate "TAOS TSL2560, TSL2561, TSL2562 and TSL2563 ambient light sensors"
+ depends on I2C
+ help
+ If you say yes here you get support for the Taos TSL2560,
+ TSL2561, TSL2562 and TSL2563 ambient light sensors.
+
+ This driver can also be built as a module. If so, the module
+ will be called tsl2563.
+
+config TSL2583
+ tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters"
+ depends on I2C
+ help
+ Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
+ Access ALS data via iio, sysfs.
+
+config TSL2772
+ tristate "TAOS TSL/TMD2x71 and TSL/TMD2x72 Family of light and proximity sensors"
+ depends on I2C
+ help
+ Support for: tsl2571, tsl2671, tmd2671, tsl2771, tmd2771, tsl2572, tsl2672,
+ tmd2672, tsl2772, tmd2772 devices.
+ Provides iio_events and direct access via sysfs.
+
+config TSL4531
+ tristate "TAOS TSL4531 ambient light sensors"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the TAOS TSL4531 family
+ of ambient light sensors with direct lux output.
+
+ To compile this driver as a module, choose M here: the
+ module will be called tsl4531.
+
+config US5182D
+ tristate "UPISEMI light and proximity sensor"
+ depends on I2C
+ help
+ If you say yes here you get support for the UPISEMI US5182D
+ ambient light and proximity sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called us5182d.
+
+config VCNL4000
+ tristate "VCNL4000/4010/4020/4200 combined ALS and proximity sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Vishay VCNL4000,
+ VCNL4010, VCNL4020, VCNL4200 combined ambient light and proximity
+ sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called vcnl4000.
+
+config VEML6070
+ tristate "VEML6070 UV A light sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Vishay VEML6070 UV A
+ light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called veml6070.
+
+config VL6180
+ tristate "VL6180 ALS, range and proximity sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the STMicroelectronics
+ VL6180 combined ambient light, range and proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called vl6180.
+
+config ZOPT2201
+ tristate "ZOPT2201 ALS and UV B sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the IDT
+ ZOPT2201 ambient light and UV B sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called zopt2201.
+
+endmenu
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
new file mode 100644
index 0000000..86337b1
--- /dev/null
+++ b/drivers/iio/light/Makefile
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for IIO Light sensors
+#
+
+# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_ACPI_ALS) += acpi-als.o
+obj-$(CONFIG_ADJD_S311) += adjd_s311.o
+obj-$(CONFIG_AL3320A) += al3320a.o
+obj-$(CONFIG_APDS9300) += apds9300.o
+obj-$(CONFIG_APDS9960) += apds9960.o
+obj-$(CONFIG_BH1750) += bh1750.o
+obj-$(CONFIG_BH1780) += bh1780.o
+obj-$(CONFIG_CM32181) += cm32181.o
+obj-$(CONFIG_CM3232) += cm3232.o
+obj-$(CONFIG_CM3323) += cm3323.o
+obj-$(CONFIG_CM3605) += cm3605.o
+obj-$(CONFIG_CM36651) += cm36651.o
+obj-$(CONFIG_IIO_CROS_EC_LIGHT_PROX) += cros_ec_light_prox.o
+obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
+obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o
+obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o
+obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
+obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
+obj-$(CONFIG_ISL29125) += isl29125.o
+obj-$(CONFIG_JSA1212) += jsa1212.o
+obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
+obj-$(CONFIG_LTR501) += ltr501.o
+obj-$(CONFIG_LV0104CS) += lv0104cs.o
+obj-$(CONFIG_MAX44000) += max44000.o
+obj-$(CONFIG_OPT3001) += opt3001.o
+obj-$(CONFIG_PA12203001) += pa12203001.o
+obj-$(CONFIG_RPR0521) += rpr0521.o
+obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
+obj-$(CONFIG_SI1133) += si1133.o
+obj-$(CONFIG_SI1145) += si1145.o
+obj-$(CONFIG_STK3310) += stk3310.o
+obj-$(CONFIG_ST_UVIS25) += st_uvis25_core.o
+obj-$(CONFIG_ST_UVIS25_I2C) += st_uvis25_i2c.o
+obj-$(CONFIG_ST_UVIS25_SPI) += st_uvis25_spi.o
+obj-$(CONFIG_TCS3414) += tcs3414.o
+obj-$(CONFIG_TCS3472) += tcs3472.o
+obj-$(CONFIG_TSL2583) += tsl2583.o
+obj-$(CONFIG_TSL2772) += tsl2772.o
+obj-$(CONFIG_TSL4531) += tsl4531.o
+obj-$(CONFIG_US5182D) += us5182d.o
+obj-$(CONFIG_VCNL4000) += vcnl4000.o
+obj-$(CONFIG_VEML6070) += veml6070.o
+obj-$(CONFIG_VL6180) += vl6180.o
+obj-$(CONFIG_ZOPT2201) += zopt2201.o
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
new file mode 100644
index 0000000..c35e2f8
--- /dev/null
+++ b/drivers/iio/light/acpi-als.c
@@ -0,0 +1,232 @@
+/*
+ * ACPI Ambient Light Sensor Driver
+ *
+ * Based on ALS driver:
+ * Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
+ *
+ * Rework for IIO subsystem:
+ * Copyright (C) 2012-2013 Martin Liska <marxin.liska@gmail.com>
+ *
+ * Final cleanup and debugging:
+ * Copyright (C) 2013-2014 Marek Vasut <marex@denx.de>
+ * Copyright (C) 2015 Gabriele Mazzotta <gabriele.mzt@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+
+#define ACPI_ALS_CLASS "als"
+#define ACPI_ALS_DEVICE_NAME "acpi-als"
+#define ACPI_ALS_NOTIFY_ILLUMINANCE 0x80
+
+ACPI_MODULE_NAME("acpi-als");
+
+/*
+ * So far, there's only one channel in here, but the specification for
+ * ACPI0008 says there can be more to what the block can report. Like
+ * chromaticity and such. We are ready for incoming additions!
+ */
+static const struct iio_chan_spec acpi_als_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ },
+ /* _RAW is here for backward ABI compatibility */
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_PROCESSED),
+ },
+};
+
+/*
+ * The event buffer contains timestamp and all the data from
+ * the ACPI0008 block. There are multiple, but so far we only
+ * support _ALI (illuminance). Once someone adds new channels
+ * to acpi_als_channels[], the evt_buffer below will grow
+ * automatically.
+ */
+#define ACPI_ALS_EVT_NR_SOURCES ARRAY_SIZE(acpi_als_channels)
+#define ACPI_ALS_EVT_BUFFER_SIZE \
+ (sizeof(s64) + (ACPI_ALS_EVT_NR_SOURCES * sizeof(s32)))
+
+struct acpi_als {
+ struct acpi_device *device;
+ struct mutex lock;
+
+ s32 evt_buffer[ACPI_ALS_EVT_BUFFER_SIZE];
+};
+
+/*
+ * All types of properties the ACPI0008 block can report. The ALI, ALC, ALT
+ * and ALP can all be handled by acpi_als_read_value() below, while the ALR is
+ * special.
+ *
+ * The _ALR property returns tables that can be used to fine-tune the values
+ * reported by the other props based on the particular hardware type and it's
+ * location (it contains tables for "rainy", "bright inhouse lighting" etc.).
+ *
+ * So far, we support only ALI (illuminance).
+ */
+#define ACPI_ALS_ILLUMINANCE "_ALI"
+#define ACPI_ALS_CHROMATICITY "_ALC"
+#define ACPI_ALS_COLOR_TEMP "_ALT"
+#define ACPI_ALS_POLLING "_ALP"
+#define ACPI_ALS_TABLES "_ALR"
+
+static int acpi_als_read_value(struct acpi_als *als, char *prop, s32 *val)
+{
+ unsigned long long temp_val;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(als->device->handle, prop, NULL,
+ &temp_val);
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Error reading ALS %s", prop));
+ return -EIO;
+ }
+
+ *val = temp_val;
+
+ return 0;
+}
+
+static void acpi_als_notify(struct acpi_device *device, u32 event)
+{
+ struct iio_dev *indio_dev = acpi_driver_data(device);
+ struct acpi_als *als = iio_priv(indio_dev);
+ s32 *buffer = als->evt_buffer;
+ s64 time_ns = iio_get_time_ns(indio_dev);
+ s32 val;
+ int ret;
+
+ mutex_lock(&als->lock);
+
+ memset(buffer, 0, ACPI_ALS_EVT_BUFFER_SIZE);
+
+ switch (event) {
+ case ACPI_ALS_NOTIFY_ILLUMINANCE:
+ ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
+ if (ret < 0)
+ goto out;
+ *buffer++ = val;
+ break;
+ default:
+ /* Unhandled event */
+ dev_dbg(&device->dev, "Unhandled ACPI ALS event (%08x)!\n",
+ event);
+ goto out;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, als->evt_buffer, time_ns);
+
+out:
+ mutex_unlock(&als->lock);
+}
+
+static int acpi_als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct acpi_als *als = iio_priv(indio_dev);
+ s32 temp_val;
+ int ret;
+
+ if ((mask != IIO_CHAN_INFO_PROCESSED) && (mask != IIO_CHAN_INFO_RAW))
+ return -EINVAL;
+
+ /* we support only illumination (_ALI) so far. */
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ ret = acpi_als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
+ if (ret < 0)
+ return ret;
+
+ *val = temp_val;
+
+ return IIO_VAL_INT;
+}
+
+static const struct iio_info acpi_als_info = {
+ .read_raw = acpi_als_read_raw,
+};
+
+static int acpi_als_add(struct acpi_device *device)
+{
+ struct acpi_als *als;
+ struct iio_dev *indio_dev;
+ struct iio_buffer *buffer;
+
+ indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ als = iio_priv(indio_dev);
+
+ device->driver_data = indio_dev;
+ als->device = device;
+ mutex_init(&als->lock);
+
+ indio_dev->name = ACPI_ALS_DEVICE_NAME;
+ indio_dev->dev.parent = &device->dev;
+ indio_dev->info = &acpi_als_info;
+ indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+ indio_dev->channels = acpi_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
+
+ buffer = devm_iio_kfifo_allocate(&device->dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+
+ return devm_iio_device_register(&device->dev, indio_dev);
+}
+
+static const struct acpi_device_id acpi_als_device_ids[] = {
+ {"ACPI0008", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, acpi_als_device_ids);
+
+static struct acpi_driver acpi_als_driver = {
+ .name = "acpi_als",
+ .class = ACPI_ALS_CLASS,
+ .ids = acpi_als_device_ids,
+ .ops = {
+ .add = acpi_als_add,
+ .notify = acpi_als_notify,
+ },
+};
+
+module_acpi_driver(acpi_als_driver);
+
+MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
+MODULE_AUTHOR("Martin Liska <marxin.liska@gmail.com>");
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("ACPI Ambient Light Sensor Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
new file mode 100644
index 0000000..e45bb6a
--- /dev/null
+++ b/drivers/iio/light/adjd_s311.c
@@ -0,0 +1,320 @@
+/*
+ * adjd_s311.c - Support for ADJD-S311-CR999 digital color sensor
+ *
+ * Copyright (C) 2012 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * driver for ADJD-S311-CR999 digital color sensor (10-bit channels for
+ * red, green, blue, clear); 7-bit I2C slave address 0x74
+ *
+ * limitations: no calibration, no offset mode, no sleep mode
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/bitmap.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define ADJD_S311_DRV_NAME "adjd_s311"
+
+#define ADJD_S311_CTRL 0x00
+#define ADJD_S311_CONFIG 0x01
+#define ADJD_S311_CAP_RED 0x06
+#define ADJD_S311_CAP_GREEN 0x07
+#define ADJD_S311_CAP_BLUE 0x08
+#define ADJD_S311_CAP_CLEAR 0x09
+#define ADJD_S311_INT_RED 0x0a
+#define ADJD_S311_INT_GREEN 0x0c
+#define ADJD_S311_INT_BLUE 0x0e
+#define ADJD_S311_INT_CLEAR 0x10
+#define ADJD_S311_DATA_RED 0x40
+#define ADJD_S311_DATA_GREEN 0x42
+#define ADJD_S311_DATA_BLUE 0x44
+#define ADJD_S311_DATA_CLEAR 0x46
+#define ADJD_S311_OFFSET_RED 0x48
+#define ADJD_S311_OFFSET_GREEN 0x49
+#define ADJD_S311_OFFSET_BLUE 0x4a
+#define ADJD_S311_OFFSET_CLEAR 0x4b
+
+#define ADJD_S311_CTRL_GOFS 0x02
+#define ADJD_S311_CTRL_GSSR 0x01
+#define ADJD_S311_CAP_MASK 0x0f
+#define ADJD_S311_INT_MASK 0x0fff
+#define ADJD_S311_DATA_MASK 0x03ff
+
+struct adjd_s311_data {
+ struct i2c_client *client;
+ u16 *buffer;
+};
+
+enum adjd_s311_channel_idx {
+ IDX_RED, IDX_GREEN, IDX_BLUE, IDX_CLEAR
+};
+
+#define ADJD_S311_DATA_REG(chan) (ADJD_S311_DATA_RED + (chan) * 2)
+#define ADJD_S311_INT_REG(chan) (ADJD_S311_INT_RED + (chan) * 2)
+#define ADJD_S311_CAP_REG(chan) (ADJD_S311_CAP_RED + (chan))
+
+static int adjd_s311_req_data(struct iio_dev *indio_dev)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ int tries = 10;
+
+ int ret = i2c_smbus_write_byte_data(data->client, ADJD_S311_CTRL,
+ ADJD_S311_CTRL_GSSR);
+ if (ret < 0)
+ return ret;
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, ADJD_S311_CTRL);
+ if (ret < 0)
+ return ret;
+ if (!(ret & ADJD_S311_CTRL_GSSR))
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev,
+ "adjd_s311_req_data() failed, data not ready\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int adjd_s311_read_data(struct iio_dev *indio_dev, u8 reg, int *val)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ int ret = adjd_s311_req_data(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_word_data(data->client, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret & ADJD_S311_DATA_MASK;
+
+ return 0;
+}
+
+static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ s64 time_ns = iio_get_time_ns(indio_dev);
+ int i, j = 0;
+
+ int ret = adjd_s311_req_data(indio_dev);
+ if (ret < 0)
+ goto done;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = i2c_smbus_read_word_data(data->client,
+ ADJD_S311_DATA_REG(i));
+ if (ret < 0)
+ goto done;
+
+ data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+#define ADJD_S311_CHANNEL(_color, _scan_idx) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .address = (IDX_##_color), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+ .channel2 = (IIO_MOD_LIGHT_##_color), \
+ .scan_index = (_scan_idx), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 10, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+}
+
+static const struct iio_chan_spec adjd_s311_channels[] = {
+ ADJD_S311_CHANNEL(RED, 0),
+ ADJD_S311_CHANNEL(GREEN, 1),
+ ADJD_S311_CHANNEL(BLUE, 2),
+ ADJD_S311_CHANNEL(CLEAR, 3),
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static int adjd_s311_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = adjd_s311_read_data(indio_dev,
+ ADJD_S311_DATA_REG(chan->address), val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ ret = i2c_smbus_read_byte_data(data->client,
+ ADJD_S311_CAP_REG(chan->address));
+ if (ret < 0)
+ return ret;
+ *val = ret & ADJD_S311_CAP_MASK;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ ret = i2c_smbus_read_word_data(data->client,
+ ADJD_S311_INT_REG(chan->address));
+ if (ret < 0)
+ return ret;
+ *val = 0;
+ /*
+ * not documented, based on measurement:
+ * 4095 LSBs correspond to roughly 4 ms
+ */
+ *val2 = ret & ADJD_S311_INT_MASK;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int adjd_s311_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ if (val < 0 || val > ADJD_S311_CAP_MASK)
+ return -EINVAL;
+
+ return i2c_smbus_write_byte_data(data->client,
+ ADJD_S311_CAP_REG(chan->address), val);
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0 || val2 < 0 || val2 > ADJD_S311_INT_MASK)
+ return -EINVAL;
+
+ return i2c_smbus_write_word_data(data->client,
+ ADJD_S311_INT_REG(chan->address), val2);
+ }
+ return -EINVAL;
+}
+
+static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ kfree(data->buffer);
+ data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (data->buffer == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static const struct iio_info adjd_s311_info = {
+ .read_raw = adjd_s311_read_raw,
+ .write_raw = adjd_s311_write_raw,
+ .update_scan_mode = adjd_s311_update_scan_mode,
+};
+
+static int adjd_s311_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adjd_s311_data *data;
+ struct iio_dev *indio_dev;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &adjd_s311_info;
+ indio_dev->name = ADJD_S311_DRV_NAME;
+ indio_dev->channels = adjd_s311_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adjd_s311_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ err = iio_triggered_buffer_setup(indio_dev, NULL,
+ adjd_s311_trigger_handler, NULL);
+ if (err < 0)
+ return err;
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto exit_unreg_buffer;
+
+ dev_info(&client->dev, "ADJD-S311 color sensor registered\n");
+
+ return 0;
+
+exit_unreg_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return err;
+}
+
+static int adjd_s311_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(data->buffer);
+
+ return 0;
+}
+
+static const struct i2c_device_id adjd_s311_id[] = {
+ { "adjd_s311", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adjd_s311_id);
+
+static struct i2c_driver adjd_s311_driver = {
+ .driver = {
+ .name = ADJD_S311_DRV_NAME,
+ },
+ .probe = adjd_s311_probe,
+ .remove = adjd_s311_remove,
+ .id_table = adjd_s311_id,
+};
+module_i2c_driver(adjd_s311_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("ADJD-S311 color sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/al3320a.c b/drivers/iio/light/al3320a.c
new file mode 100644
index 0000000..66623fa
--- /dev/null
+++ b/drivers/iio/light/al3320a.c
@@ -0,0 +1,231 @@
+/*
+ * AL3320A - Dyna Image Ambient Light Sensor
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for AL3320A (7-bit I2C slave address 0x1C).
+ *
+ * TODO: interrupt support, thresholds
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define AL3320A_DRV_NAME "al3320a"
+
+#define AL3320A_REG_CONFIG 0x00
+#define AL3320A_REG_STATUS 0x01
+#define AL3320A_REG_INT 0x02
+#define AL3320A_REG_WAIT 0x06
+#define AL3320A_REG_CONFIG_RANGE 0x07
+#define AL3320A_REG_PERSIST 0x08
+#define AL3320A_REG_MEAN_TIME 0x09
+#define AL3320A_REG_ADUMMY 0x0A
+#define AL3320A_REG_DATA_LOW 0x22
+
+#define AL3320A_REG_LOW_THRESH_LOW 0x30
+#define AL3320A_REG_LOW_THRESH_HIGH 0x31
+#define AL3320A_REG_HIGH_THRESH_LOW 0x32
+#define AL3320A_REG_HIGH_THRESH_HIGH 0x33
+
+#define AL3320A_CONFIG_DISABLE 0x00
+#define AL3320A_CONFIG_ENABLE 0x01
+
+#define AL3320A_GAIN_SHIFT 1
+#define AL3320A_GAIN_MASK (BIT(2) | BIT(1))
+
+/* chip params default values */
+#define AL3320A_DEFAULT_MEAN_TIME 4
+#define AL3320A_DEFAULT_WAIT_TIME 0 /* no waiting */
+
+#define AL3320A_SCALE_AVAILABLE "0.512 0.128 0.032 0.01"
+
+enum al3320a_range {
+ AL3320A_RANGE_1, /* 33.28 Klx */
+ AL3320A_RANGE_2, /* 8.32 Klx */
+ AL3320A_RANGE_3, /* 2.08 Klx */
+ AL3320A_RANGE_4 /* 0.65 Klx */
+};
+
+static const int al3320a_scales[][2] = {
+ {0, 512000}, {0, 128000}, {0, 32000}, {0, 10000}
+};
+
+struct al3320a_data {
+ struct i2c_client *client;
+};
+
+static const struct iio_chan_spec al3320a_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, AL3320A_SCALE_AVAILABLE);
+
+static struct attribute *al3320a_attributes[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group al3320a_attribute_group = {
+ .attrs = al3320a_attributes,
+};
+
+static int al3320a_init(struct al3320a_data *data)
+{
+ int ret;
+
+ /* power on */
+ ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_CONFIG,
+ AL3320A_CONFIG_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_CONFIG_RANGE,
+ AL3320A_RANGE_3 << AL3320A_GAIN_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_MEAN_TIME,
+ AL3320A_DEFAULT_MEAN_TIME);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_WAIT,
+ AL3320A_DEFAULT_WAIT_TIME);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int al3320a_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct al3320a_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ /*
+ * ALS ADC value is stored in two adjacent registers:
+ * - low byte of output is stored at AL3320A_REG_DATA_LOW
+ * - high byte of output is stored at AL3320A_REG_DATA_LOW + 1
+ */
+ ret = i2c_smbus_read_word_data(data->client,
+ AL3320A_REG_DATA_LOW);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = i2c_smbus_read_byte_data(data->client,
+ AL3320A_REG_CONFIG_RANGE);
+ if (ret < 0)
+ return ret;
+
+ ret = (ret & AL3320A_GAIN_MASK) >> AL3320A_GAIN_SHIFT;
+ *val = al3320a_scales[ret][0];
+ *val2 = al3320a_scales[ret][1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int al3320a_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct al3320a_data *data = iio_priv(indio_dev);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ for (i = 0; i < ARRAY_SIZE(al3320a_scales); i++) {
+ if (val == al3320a_scales[i][0] &&
+ val2 == al3320a_scales[i][1])
+ return i2c_smbus_write_byte_data(data->client,
+ AL3320A_REG_CONFIG_RANGE,
+ i << AL3320A_GAIN_SHIFT);
+ }
+ break;
+ }
+ return -EINVAL;
+}
+
+static const struct iio_info al3320a_info = {
+ .read_raw = al3320a_read_raw,
+ .write_raw = al3320a_write_raw,
+ .attrs = &al3320a_attribute_group,
+};
+
+static int al3320a_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct al3320a_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &al3320a_info;
+ indio_dev->name = AL3320A_DRV_NAME;
+ indio_dev->channels = al3320a_channels;
+ indio_dev->num_channels = ARRAY_SIZE(al3320a_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = al3320a_init(data);
+ if (ret < 0) {
+ dev_err(&client->dev, "al3320a chip init failed\n");
+ return ret;
+ }
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static int al3320a_remove(struct i2c_client *client)
+{
+ return i2c_smbus_write_byte_data(client, AL3320A_REG_CONFIG,
+ AL3320A_CONFIG_DISABLE);
+}
+
+static const struct i2c_device_id al3320a_id[] = {
+ {"al3320a", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, al3320a_id);
+
+static struct i2c_driver al3320a_driver = {
+ .driver = {
+ .name = AL3320A_DRV_NAME,
+ },
+ .probe = al3320a_probe,
+ .remove = al3320a_remove,
+ .id_table = al3320a_id,
+};
+
+module_i2c_driver(al3320a_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("AL3320A Ambient Light Sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/apds9300.c b/drivers/iio/light/apds9300.c
new file mode 100644
index 0000000..5c15736
--- /dev/null
+++ b/drivers/iio/light/apds9300.c
@@ -0,0 +1,528 @@
+/*
+ * apds9300.c - IIO driver for Avago APDS9300 ambient light sensor
+ *
+ * Copyright 2013 Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+
+#define APDS9300_DRV_NAME "apds9300"
+#define APDS9300_IRQ_NAME "apds9300_event"
+
+/* Command register bits */
+#define APDS9300_CMD BIT(7) /* Select command register. Must write as 1 */
+#define APDS9300_WORD BIT(5) /* I2C write/read: if 1 word, if 0 byte */
+#define APDS9300_CLEAR BIT(6) /* Interrupt clear. Clears pending interrupt */
+
+/* Register set */
+#define APDS9300_CONTROL 0x00 /* Control of basic functions */
+#define APDS9300_THRESHLOWLOW 0x02 /* Low byte of low interrupt threshold */
+#define APDS9300_THRESHHIGHLOW 0x04 /* Low byte of high interrupt threshold */
+#define APDS9300_INTERRUPT 0x06 /* Interrupt control */
+#define APDS9300_DATA0LOW 0x0c /* Low byte of ADC channel 0 */
+#define APDS9300_DATA1LOW 0x0e /* Low byte of ADC channel 1 */
+
+/* Power on/off value for APDS9300_CONTROL register */
+#define APDS9300_POWER_ON 0x03
+#define APDS9300_POWER_OFF 0x00
+
+/* Interrupts */
+#define APDS9300_INTR_ENABLE 0x10
+/* Interrupt Persist Function: Any value outside of threshold range */
+#define APDS9300_THRESH_INTR 0x01
+
+#define APDS9300_THRESH_MAX 0xffff /* Max threshold value */
+
+struct apds9300_data {
+ struct i2c_client *client;
+ struct mutex mutex;
+ int power_state;
+ int thresh_low;
+ int thresh_hi;
+ int intr_en;
+};
+
+/* Lux calculation */
+
+/* Calculated values 1000 * (CH1/CH0)^1.4 for CH1/CH0 from 0 to 0.52 */
+static const u16 apds9300_lux_ratio[] = {
+ 0, 2, 4, 7, 11, 15, 19, 24, 29, 34, 40, 45, 51, 57, 64, 70, 77, 84, 91,
+ 98, 105, 112, 120, 128, 136, 144, 152, 160, 168, 177, 185, 194, 203,
+ 212, 221, 230, 239, 249, 258, 268, 277, 287, 297, 307, 317, 327, 337,
+ 347, 358, 368, 379, 390, 400,
+};
+
+static unsigned long apds9300_calculate_lux(u16 ch0, u16 ch1)
+{
+ unsigned long lux, tmp;
+
+ /* avoid division by zero */
+ if (ch0 == 0)
+ return 0;
+
+ tmp = DIV_ROUND_UP(ch1 * 100, ch0);
+ if (tmp <= 52) {
+ lux = 3150 * ch0 - (unsigned long)DIV_ROUND_UP_ULL(ch0
+ * apds9300_lux_ratio[tmp] * 5930ull, 1000);
+ } else if (tmp <= 65) {
+ lux = 2290 * ch0 - 2910 * ch1;
+ } else if (tmp <= 80) {
+ lux = 1570 * ch0 - 1800 * ch1;
+ } else if (tmp <= 130) {
+ lux = 338 * ch0 - 260 * ch1;
+ } else {
+ lux = 0;
+ }
+
+ return lux / 100000;
+}
+
+static int apds9300_get_adc_val(struct apds9300_data *data, int adc_number)
+{
+ int ret;
+ u8 flags = APDS9300_CMD | APDS9300_WORD;
+
+ if (!data->power_state)
+ return -EBUSY;
+
+ /* Select ADC0 or ADC1 data register */
+ flags |= adc_number ? APDS9300_DATA1LOW : APDS9300_DATA0LOW;
+
+ ret = i2c_smbus_read_word_data(data->client, flags);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "failed to read ADC%d value\n", adc_number);
+
+ return ret;
+}
+
+static int apds9300_set_thresh_low(struct apds9300_data *data, int value)
+{
+ int ret;
+
+ if (!data->power_state)
+ return -EBUSY;
+
+ if (value > APDS9300_THRESH_MAX)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHLOWLOW
+ | APDS9300_CMD | APDS9300_WORD, value);
+ if (ret) {
+ dev_err(&data->client->dev, "failed to set thresh_low\n");
+ return ret;
+ }
+ data->thresh_low = value;
+
+ return 0;
+}
+
+static int apds9300_set_thresh_hi(struct apds9300_data *data, int value)
+{
+ int ret;
+
+ if (!data->power_state)
+ return -EBUSY;
+
+ if (value > APDS9300_THRESH_MAX)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_word_data(data->client, APDS9300_THRESHHIGHLOW
+ | APDS9300_CMD | APDS9300_WORD, value);
+ if (ret) {
+ dev_err(&data->client->dev, "failed to set thresh_hi\n");
+ return ret;
+ }
+ data->thresh_hi = value;
+
+ return 0;
+}
+
+static int apds9300_set_intr_state(struct apds9300_data *data, int state)
+{
+ int ret;
+ u8 cmd;
+
+ if (!data->power_state)
+ return -EBUSY;
+
+ cmd = state ? APDS9300_INTR_ENABLE | APDS9300_THRESH_INTR : 0x00;
+ ret = i2c_smbus_write_byte_data(data->client,
+ APDS9300_INTERRUPT | APDS9300_CMD, cmd);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to set interrupt state %d\n", state);
+ return ret;
+ }
+ data->intr_en = state;
+
+ return 0;
+}
+
+static int apds9300_set_power_state(struct apds9300_data *data, int state)
+{
+ int ret;
+ u8 cmd;
+
+ cmd = state ? APDS9300_POWER_ON : APDS9300_POWER_OFF;
+ ret = i2c_smbus_write_byte_data(data->client,
+ APDS9300_CONTROL | APDS9300_CMD, cmd);
+ if (ret) {
+ dev_err(&data->client->dev,
+ "failed to set power state %d\n", state);
+ return ret;
+ }
+ data->power_state = state;
+
+ return 0;
+}
+
+static void apds9300_clear_intr(struct apds9300_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte(data->client, APDS9300_CLEAR | APDS9300_CMD);
+ if (ret < 0)
+ dev_err(&data->client->dev, "failed to clear interrupt\n");
+}
+
+static int apds9300_chip_init(struct apds9300_data *data)
+{
+ int ret;
+
+ /* Need to set power off to ensure that the chip is off */
+ ret = apds9300_set_power_state(data, 0);
+ if (ret < 0)
+ goto err;
+ /*
+ * Probe the chip. To do so we try to power up the device and then to
+ * read back the 0x03 code
+ */
+ ret = apds9300_set_power_state(data, 1);
+ if (ret < 0)
+ goto err;
+ ret = i2c_smbus_read_byte_data(data->client,
+ APDS9300_CONTROL | APDS9300_CMD);
+ if (ret != APDS9300_POWER_ON) {
+ ret = -ENODEV;
+ goto err;
+ }
+ /*
+ * Disable interrupt to ensure thai it is doesn't enable
+ * i.e. after device soft reset
+ */
+ ret = apds9300_set_intr_state(data, 0);
+ if (ret < 0)
+ goto err;
+
+ return 0;
+
+err:
+ dev_err(&data->client->dev, "failed to init the chip\n");
+ return ret;
+}
+
+static int apds9300_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
+{
+ int ch0, ch1, ret = -EINVAL;
+ struct apds9300_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ch0 = apds9300_get_adc_val(data, 0);
+ if (ch0 < 0) {
+ ret = ch0;
+ break;
+ }
+ ch1 = apds9300_get_adc_val(data, 1);
+ if (ch1 < 0) {
+ ret = ch1;
+ break;
+ }
+ *val = apds9300_calculate_lux(ch0, ch1);
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_INTENSITY:
+ ret = apds9300_get_adc_val(data, chan->channel);
+ if (ret < 0)
+ break;
+ *val = ret;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int apds9300_read_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct apds9300_data *data = iio_priv(indio_dev);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ *val = data->thresh_hi;
+ break;
+ case IIO_EV_DIR_FALLING:
+ *val = data->thresh_low;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int apds9300_write_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int val,
+ int val2)
+{
+ struct apds9300_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ if (dir == IIO_EV_DIR_RISING)
+ ret = apds9300_set_thresh_hi(data, val);
+ else
+ ret = apds9300_set_thresh_low(data, val);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int apds9300_read_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct apds9300_data *data = iio_priv(indio_dev);
+
+ return data->intr_en;
+}
+
+static int apds9300_write_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct apds9300_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = apds9300_set_intr_state(data, state);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static const struct iio_info apds9300_info_no_irq = {
+ .read_raw = apds9300_read_raw,
+};
+
+static const struct iio_info apds9300_info = {
+ .read_raw = apds9300_read_raw,
+ .read_event_value = apds9300_read_thresh,
+ .write_event_value = apds9300_write_thresh,
+ .read_event_config = apds9300_read_interrupt_config,
+ .write_event_config = apds9300_write_interrupt_config,
+};
+
+static const struct iio_event_spec apds9300_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec apds9300_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .channel = 0,
+ .indexed = true,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .channel = 0,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .indexed = true,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = apds9300_event_spec,
+ .num_event_specs = ARRAY_SIZE(apds9300_event_spec),
+ }, {
+ .type = IIO_INTENSITY,
+ .channel = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .indexed = true,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+};
+
+static irqreturn_t apds9300_interrupt_handler(int irq, void *private)
+{
+ struct iio_dev *dev_info = private;
+ struct apds9300_data *data = iio_priv(dev_info);
+
+ iio_push_event(dev_info,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(dev_info));
+
+ apds9300_clear_intr(data);
+
+ return IRQ_HANDLED;
+}
+
+static int apds9300_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct apds9300_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ ret = apds9300_chip_init(data);
+ if (ret < 0)
+ goto err;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = apds9300_channels;
+ indio_dev->num_channels = ARRAY_SIZE(apds9300_channels);
+ indio_dev->name = APDS9300_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ if (client->irq)
+ indio_dev->info = &apds9300_info;
+ else
+ indio_dev->info = &apds9300_info_no_irq;
+
+ if (client->irq) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, apds9300_interrupt_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ APDS9300_IRQ_NAME, indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "irq request error %d\n", -ret);
+ goto err;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto err;
+
+ return 0;
+
+err:
+ /* Ensure that power off in case of error */
+ apds9300_set_power_state(data, 0);
+ return ret;
+}
+
+static int apds9300_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct apds9300_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ /* Ensure that power off and interrupts are disabled */
+ apds9300_set_intr_state(data, 0);
+ apds9300_set_power_state(data, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int apds9300_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct apds9300_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = apds9300_set_power_state(data, 0);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static int apds9300_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct apds9300_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->mutex);
+ ret = apds9300_set_power_state(data, 1);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(apds9300_pm_ops, apds9300_suspend, apds9300_resume);
+#define APDS9300_PM_OPS (&apds9300_pm_ops)
+#else
+#define APDS9300_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id apds9300_id[] = {
+ { APDS9300_DRV_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, apds9300_id);
+
+static struct i2c_driver apds9300_driver = {
+ .driver = {
+ .name = APDS9300_DRV_NAME,
+ .pm = APDS9300_PM_OPS,
+ },
+ .probe = apds9300_probe,
+ .remove = apds9300_remove,
+ .id_table = apds9300_id,
+};
+
+module_i2c_driver(apds9300_driver);
+
+MODULE_AUTHOR("Kravchenko Oleksandr <o.v.kravchenko@globallogic.com>");
+MODULE_AUTHOR("GlobalLogic inc.");
+MODULE_DESCRIPTION("APDS9300 ambient light photo sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
new file mode 100644
index 0000000..1f112ae
--- /dev/null
+++ b/drivers/iio/light/apds9960.c
@@ -0,0 +1,1138 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * apds9960.c - Support for Avago APDS9960 gesture/RGB/ALS/proximity sensor
+ *
+ * Copyright (C) 2015, 2018
+ * Author: Matt Ranostay <matt.ranostay@konsulko.com>
+ *
+ * TODO: gesture + proximity calib offsets
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/sysfs.h>
+#include <linux/of_gpio.h>
+
+#define APDS9960_REGMAP_NAME "apds9960_regmap"
+#define APDS9960_DRV_NAME "apds9960"
+
+#define APDS9960_REG_RAM_START 0x00
+#define APDS9960_REG_RAM_END 0x7f
+
+#define APDS9960_REG_ENABLE 0x80
+#define APDS9960_REG_ATIME 0x81
+#define APDS9960_REG_WTIME 0x83
+
+#define APDS9960_REG_AILTL 0x84
+#define APDS9960_REG_AILTH 0x85
+#define APDS9960_REG_AIHTL 0x86
+#define APDS9960_REG_AIHTH 0x87
+
+#define APDS9960_REG_PILT 0x89
+#define APDS9960_REG_PIHT 0x8b
+#define APDS9960_REG_PERS 0x8c
+
+#define APDS9960_REG_CONFIG_1 0x8d
+#define APDS9960_REG_PPULSE 0x8e
+
+#define APDS9960_REG_CONTROL 0x8f
+#define APDS9960_REG_CONTROL_AGAIN_MASK 0x03
+#define APDS9960_REG_CONTROL_PGAIN_MASK 0x0c
+#define APDS9960_REG_CONTROL_AGAIN_MASK_SHIFT 0
+#define APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT 2
+
+#define APDS9960_REG_CONFIG_2 0x90
+#define APDS9960_REG_CONFIG_2_GGAIN_MASK 0x60
+#define APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT 5
+
+#define APDS9960_REG_ID 0x92
+
+#define APDS9960_REG_STATUS 0x93
+#define APDS9960_REG_STATUS_PS_INT BIT(5)
+#define APDS9960_REG_STATUS_ALS_INT BIT(4)
+#define APDS9960_REG_STATUS_GINT BIT(2)
+
+#define APDS9960_REG_PDATA 0x9c
+#define APDS9960_REG_POFFSET_UR 0x9d
+#define APDS9960_REG_POFFSET_DL 0x9e
+#define APDS9960_REG_CONFIG_3 0x9f
+
+#define APDS9960_REG_GPENTH 0xa0
+#define APDS9960_REG_GEXTH 0xa1
+
+#define APDS9960_REG_GCONF_1 0xa2
+#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK 0xc0
+#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT 6
+
+#define APDS9960_REG_GCONF_2 0xa3
+#define APDS9960_REG_GOFFSET_U 0xa4
+#define APDS9960_REG_GOFFSET_D 0xa5
+#define APDS9960_REG_GPULSE 0xa6
+#define APDS9960_REG_GOFFSET_L 0xa7
+#define APDS9960_REG_GOFFSET_R 0xa9
+#define APDS9960_REG_GCONF_3 0xaa
+
+#define APDS9960_REG_GCONF_4 0xab
+#define APDS9960_REG_GFLVL 0xae
+#define APDS9960_REG_GSTATUS 0xaf
+
+#define APDS9960_REG_IFORCE 0xe4
+#define APDS9960_REG_PICLEAR 0xe5
+#define APDS9960_REG_CICLEAR 0xe6
+#define APDS9960_REG_AICLEAR 0xe7
+
+#define APDS9960_DEFAULT_PERS 0x33
+#define APDS9960_DEFAULT_GPENTH 0x50
+#define APDS9960_DEFAULT_GEXTH 0x40
+
+#define APDS9960_MAX_PXS_THRES_VAL 255
+#define APDS9960_MAX_ALS_THRES_VAL 0xffff
+#define APDS9960_MAX_INT_TIME_IN_US 1000000
+
+enum apds9960_als_channel_idx {
+ IDX_ALS_CLEAR, IDX_ALS_RED, IDX_ALS_GREEN, IDX_ALS_BLUE,
+};
+
+#define APDS9960_REG_ALS_BASE 0x94
+#define APDS9960_REG_ALS_CHANNEL(_colour) \
+ (APDS9960_REG_ALS_BASE + (IDX_ALS_##_colour * 2))
+
+enum apds9960_gesture_channel_idx {
+ IDX_DIR_UP, IDX_DIR_DOWN, IDX_DIR_LEFT, IDX_DIR_RIGHT,
+};
+
+#define APDS9960_REG_GFIFO_BASE 0xfc
+#define APDS9960_REG_GFIFO_DIR(_dir) \
+ (APDS9960_REG_GFIFO_BASE + IDX_DIR_##_dir)
+
+struct apds9960_data {
+ struct i2c_client *client;
+ struct iio_dev *indio_dev;
+ struct mutex lock;
+
+ /* regmap fields */
+ struct regmap *regmap;
+ struct regmap_field *reg_int_als;
+ struct regmap_field *reg_int_ges;
+ struct regmap_field *reg_int_pxs;
+
+ struct regmap_field *reg_enable_als;
+ struct regmap_field *reg_enable_ges;
+ struct regmap_field *reg_enable_pxs;
+
+ /* state */
+ int als_int;
+ int pxs_int;
+ int gesture_mode_running;
+
+ /* gain values */
+ int als_gain;
+ int pxs_gain;
+
+ /* integration time value in us */
+ int als_adc_int_us;
+
+ /* gesture buffer */
+ u8 buffer[4]; /* 4 8-bit channels */
+};
+
+static const struct reg_default apds9960_reg_defaults[] = {
+ /* Default ALS integration time = 2.48ms */
+ { APDS9960_REG_ATIME, 0xff },
+};
+
+static const struct regmap_range apds9960_volatile_ranges[] = {
+ regmap_reg_range(APDS9960_REG_STATUS,
+ APDS9960_REG_PDATA),
+ regmap_reg_range(APDS9960_REG_GFLVL,
+ APDS9960_REG_GSTATUS),
+ regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
+ APDS9960_REG_GFIFO_DIR(RIGHT)),
+ regmap_reg_range(APDS9960_REG_IFORCE,
+ APDS9960_REG_AICLEAR),
+};
+
+static const struct regmap_access_table apds9960_volatile_table = {
+ .yes_ranges = apds9960_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9960_volatile_ranges),
+};
+
+static const struct regmap_range apds9960_precious_ranges[] = {
+ regmap_reg_range(APDS9960_REG_RAM_START, APDS9960_REG_RAM_END),
+};
+
+static const struct regmap_access_table apds9960_precious_table = {
+ .yes_ranges = apds9960_precious_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9960_precious_ranges),
+};
+
+static const struct regmap_range apds9960_readable_ranges[] = {
+ regmap_reg_range(APDS9960_REG_ENABLE,
+ APDS9960_REG_GSTATUS),
+ regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
+ APDS9960_REG_GFIFO_DIR(RIGHT)),
+};
+
+static const struct regmap_access_table apds9960_readable_table = {
+ .yes_ranges = apds9960_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9960_readable_ranges),
+};
+
+static const struct regmap_range apds9960_writeable_ranges[] = {
+ regmap_reg_range(APDS9960_REG_ENABLE, APDS9960_REG_CONFIG_2),
+ regmap_reg_range(APDS9960_REG_POFFSET_UR, APDS9960_REG_GCONF_4),
+ regmap_reg_range(APDS9960_REG_IFORCE, APDS9960_REG_AICLEAR),
+};
+
+static const struct regmap_access_table apds9960_writeable_table = {
+ .yes_ranges = apds9960_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(apds9960_writeable_ranges),
+};
+
+static const struct regmap_config apds9960_regmap_config = {
+ .name = APDS9960_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .use_single_rw = 1,
+
+ .volatile_table = &apds9960_volatile_table,
+ .precious_table = &apds9960_precious_table,
+ .rd_table = &apds9960_readable_table,
+ .wr_table = &apds9960_writeable_table,
+
+ .reg_defaults = apds9960_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(apds9960_reg_defaults),
+ .max_register = APDS9960_REG_GFIFO_DIR(RIGHT),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct iio_event_spec apds9960_pxs_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_event_spec apds9960_als_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+#define APDS9960_GESTURE_CHANNEL(_dir, _si) { \
+ .type = IIO_PROXIMITY, \
+ .channel = _si + 1, \
+ .scan_index = _si, \
+ .indexed = 1, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 8, \
+ .storagebits = 8, \
+ }, \
+}
+
+#define APDS9960_INTENSITY_CHANNEL(_colour) { \
+ .type = IIO_INTENSITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+ .channel2 = IIO_MOD_LIGHT_##_colour, \
+ .address = APDS9960_REG_ALS_CHANNEL(_colour), \
+ .modified = 1, \
+ .scan_index = -1, \
+}
+
+static const unsigned long apds9960_scan_masks[] = {0xf, 0};
+
+static const struct iio_chan_spec apds9960_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .address = APDS9960_REG_PDATA,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+ .channel = 0,
+ .indexed = 0,
+ .scan_index = -1,
+
+ .event_spec = apds9960_pxs_event_spec,
+ .num_event_specs = ARRAY_SIZE(apds9960_pxs_event_spec),
+ },
+ /* Gesture Sensor */
+ APDS9960_GESTURE_CHANNEL(UP, 0),
+ APDS9960_GESTURE_CHANNEL(DOWN, 1),
+ APDS9960_GESTURE_CHANNEL(LEFT, 2),
+ APDS9960_GESTURE_CHANNEL(RIGHT, 3),
+ /* ALS */
+ {
+ .type = IIO_INTENSITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .channel2 = IIO_MOD_LIGHT_CLEAR,
+ .address = APDS9960_REG_ALS_CHANNEL(CLEAR),
+ .modified = 1,
+ .scan_index = -1,
+
+ .event_spec = apds9960_als_event_spec,
+ .num_event_specs = ARRAY_SIZE(apds9960_als_event_spec),
+ },
+ /* RGB Sensor */
+ APDS9960_INTENSITY_CHANNEL(RED),
+ APDS9960_INTENSITY_CHANNEL(GREEN),
+ APDS9960_INTENSITY_CHANNEL(BLUE),
+};
+
+/* integration time in us */
+static const int apds9960_int_time[][2] = {
+ { 28000, 246},
+ {100000, 219},
+ {200000, 182},
+ {700000, 0}
+};
+
+/* gain mapping */
+static const int apds9960_pxs_gain_map[] = {1, 2, 4, 8};
+static const int apds9960_als_gain_map[] = {1, 4, 16, 64};
+
+static IIO_CONST_ATTR(proximity_scale_available, "1 2 4 8");
+static IIO_CONST_ATTR(intensity_scale_available, "1 4 16 64");
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.028 0.1 0.2 0.7");
+
+static struct attribute *apds9960_attributes[] = {
+ &iio_const_attr_proximity_scale_available.dev_attr.attr,
+ &iio_const_attr_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group apds9960_attribute_group = {
+ .attrs = apds9960_attributes,
+};
+
+static const struct reg_field apds9960_reg_field_int_als =
+ REG_FIELD(APDS9960_REG_ENABLE, 4, 4);
+
+static const struct reg_field apds9960_reg_field_int_ges =
+ REG_FIELD(APDS9960_REG_GCONF_4, 1, 1);
+
+static const struct reg_field apds9960_reg_field_int_pxs =
+ REG_FIELD(APDS9960_REG_ENABLE, 5, 5);
+
+static const struct reg_field apds9960_reg_field_enable_als =
+ REG_FIELD(APDS9960_REG_ENABLE, 1, 1);
+
+static const struct reg_field apds9960_reg_field_enable_ges =
+ REG_FIELD(APDS9960_REG_ENABLE, 6, 6);
+
+static const struct reg_field apds9960_reg_field_enable_pxs =
+ REG_FIELD(APDS9960_REG_ENABLE, 2, 2);
+
+static int apds9960_set_it_time(struct apds9960_data *data, int val2)
+{
+ int ret = -EINVAL;
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9960_int_time); idx++) {
+ if (apds9960_int_time[idx][0] == val2) {
+ mutex_lock(&data->lock);
+ ret = regmap_write(data->regmap, APDS9960_REG_ATIME,
+ apds9960_int_time[idx][1]);
+ if (!ret)
+ data->als_adc_int_us = val2;
+ mutex_unlock(&data->lock);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int apds9960_set_pxs_gain(struct apds9960_data *data, int val)
+{
+ int ret = -EINVAL;
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9960_pxs_gain_map); idx++) {
+ if (apds9960_pxs_gain_map[idx] == val) {
+ /* pxs + gesture gains are mirrored */
+ mutex_lock(&data->lock);
+ ret = regmap_update_bits(data->regmap,
+ APDS9960_REG_CONTROL,
+ APDS9960_REG_CONTROL_PGAIN_MASK,
+ idx << APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT);
+ if (ret) {
+ mutex_unlock(&data->lock);
+ break;
+ }
+
+ ret = regmap_update_bits(data->regmap,
+ APDS9960_REG_CONFIG_2,
+ APDS9960_REG_CONFIG_2_GGAIN_MASK,
+ idx << APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT);
+ if (!ret)
+ data->pxs_gain = idx;
+ mutex_unlock(&data->lock);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int apds9960_set_als_gain(struct apds9960_data *data, int val)
+{
+ int ret = -EINVAL;
+ int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(apds9960_als_gain_map); idx++) {
+ if (apds9960_als_gain_map[idx] == val) {
+ mutex_lock(&data->lock);
+ ret = regmap_update_bits(data->regmap,
+ APDS9960_REG_CONTROL,
+ APDS9960_REG_CONTROL_AGAIN_MASK, idx);
+ if (!ret)
+ data->als_gain = idx;
+ mutex_unlock(&data->lock);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int apds9960_set_power_state(struct apds9960_data *data, bool on)
+{
+ struct device *dev = &data->client->dev;
+ int ret = 0;
+
+ mutex_lock(&data->lock);
+
+ if (on) {
+ int suspended;
+
+ suspended = pm_runtime_suspended(dev);
+ ret = pm_runtime_get_sync(dev);
+
+ /* Allow one integration cycle before allowing a reading */
+ if (suspended)
+ usleep_range(data->als_adc_int_us,
+ APDS9960_MAX_INT_TIME_IN_US);
+ } else {
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ }
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+#else
+static int apds9960_set_power_state(struct apds9960_data *data, bool on)
+{
+ return 0;
+}
+#endif
+
+static int apds9960_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+ __le16 buf;
+ int ret = -EINVAL;
+
+ if (data->gesture_mode_running)
+ return -EBUSY;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ apds9960_set_power_state(data, true);
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ ret = regmap_read(data->regmap, chan->address, val);
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_INTENSITY:
+ ret = regmap_bulk_read(data->regmap, chan->address,
+ &buf, 2);
+ if (!ret) {
+ ret = IIO_VAL_INT;
+ *val = le16_to_cpu(buf);
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ apds9960_set_power_state(data, false);
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ /* RGB + ALS sensors only have integration time */
+ mutex_lock(&data->lock);
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ *val = 0;
+ *val2 = data->als_adc_int_us;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ mutex_unlock(&data->lock);
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ mutex_lock(&data->lock);
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *val = apds9960_pxs_gain_map[data->pxs_gain];
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_INTENSITY:
+ *val = apds9960_als_gain_map[data->als_gain];
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ mutex_unlock(&data->lock);
+ break;
+ }
+
+ return ret;
+};
+
+static int apds9960_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ /* RGB + ALS sensors only have int time */
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ if (val != 0)
+ return -EINVAL;
+ return apds9960_set_it_time(data, val2);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ if (val2 != 0)
+ return -EINVAL;
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return apds9960_set_pxs_gain(data, val);
+ case IIO_INTENSITY:
+ return apds9960_set_als_gain(data, val);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+static inline int apds9960_get_thres_reg(const struct iio_chan_spec *chan,
+ enum iio_event_direction dir,
+ u8 *reg)
+{
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *reg = APDS9960_REG_PIHT;
+ break;
+ case IIO_INTENSITY:
+ *reg = APDS9960_REG_AIHTL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case IIO_EV_DIR_FALLING:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ *reg = APDS9960_REG_PILT;
+ break;
+ case IIO_INTENSITY:
+ *reg = APDS9960_REG_AILTL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int apds9960_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ u8 reg;
+ __le16 buf;
+ int ret = 0;
+ struct apds9960_data *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ ret = apds9960_get_thres_reg(chan, dir, ®);
+ if (ret < 0)
+ return ret;
+
+ if (chan->type == IIO_PROXIMITY) {
+ ret = regmap_read(data->regmap, reg, val);
+ if (ret < 0)
+ return ret;
+ } else if (chan->type == IIO_INTENSITY) {
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ if (ret < 0)
+ return ret;
+ *val = le16_to_cpu(buf);
+ } else
+ return -EINVAL;
+
+ *val2 = 0;
+
+ return IIO_VAL_INT;
+}
+
+static int apds9960_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ u8 reg;
+ __le16 buf;
+ int ret = 0;
+ struct apds9960_data *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ ret = apds9960_get_thres_reg(chan, dir, ®);
+ if (ret < 0)
+ return ret;
+
+ if (chan->type == IIO_PROXIMITY) {
+ if (val < 0 || val > APDS9960_MAX_PXS_THRES_VAL)
+ return -EINVAL;
+ ret = regmap_write(data->regmap, reg, val);
+ if (ret < 0)
+ return ret;
+ } else if (chan->type == IIO_INTENSITY) {
+ if (val < 0 || val > APDS9960_MAX_ALS_THRES_VAL)
+ return -EINVAL;
+ buf = cpu_to_le16(val);
+ ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
+ if (ret < 0)
+ return ret;
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int apds9960_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ return data->pxs_int;
+ case IIO_INTENSITY:
+ return data->als_int;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int apds9960_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+ int ret;
+
+ state = !!state;
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ if (data->pxs_int == state)
+ return -EINVAL;
+
+ ret = regmap_field_write(data->reg_int_pxs, state);
+ if (ret)
+ return ret;
+ data->pxs_int = state;
+ apds9960_set_power_state(data, state);
+ break;
+ case IIO_INTENSITY:
+ if (data->als_int == state)
+ return -EINVAL;
+
+ ret = regmap_field_write(data->reg_int_als, state);
+ if (ret)
+ return ret;
+ data->als_int = state;
+ apds9960_set_power_state(data, state);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct iio_info apds9960_info = {
+ .attrs = &apds9960_attribute_group,
+ .read_raw = apds9960_read_raw,
+ .write_raw = apds9960_write_raw,
+ .read_event_value = apds9960_read_event,
+ .write_event_value = apds9960_write_event,
+ .read_event_config = apds9960_read_event_config,
+ .write_event_config = apds9960_write_event_config,
+
+};
+
+static inline int apds9660_fifo_is_empty(struct apds9960_data *data)
+{
+ int cnt;
+ int ret;
+
+ ret = regmap_read(data->regmap, APDS9960_REG_GFLVL, &cnt);
+ if (ret)
+ return ret;
+
+ return cnt;
+}
+
+static void apds9960_read_gesture_fifo(struct apds9960_data *data)
+{
+ int ret, cnt = 0;
+
+ mutex_lock(&data->lock);
+ data->gesture_mode_running = 1;
+
+ while (cnt || (cnt = apds9660_fifo_is_empty(data) > 0)) {
+ ret = regmap_bulk_read(data->regmap, APDS9960_REG_GFIFO_BASE,
+ &data->buffer, 4);
+
+ if (ret)
+ goto err_read;
+
+ iio_push_to_buffers(data->indio_dev, data->buffer);
+ cnt--;
+ }
+
+err_read:
+ data->gesture_mode_running = 0;
+ mutex_unlock(&data->lock);
+}
+
+static irqreturn_t apds9960_interrupt_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct apds9960_data *data = iio_priv(indio_dev);
+ int ret, status;
+
+ ret = regmap_read(data->regmap, APDS9960_REG_STATUS, &status);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "irq status reg read failed\n");
+ return IRQ_HANDLED;
+ }
+
+ if ((status & APDS9960_REG_STATUS_ALS_INT) && data->als_int) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+ regmap_write(data->regmap, APDS9960_REG_CICLEAR, 1);
+ }
+
+ if ((status & APDS9960_REG_STATUS_PS_INT) && data->pxs_int) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+ regmap_write(data->regmap, APDS9960_REG_PICLEAR, 1);
+ }
+
+ if (status & APDS9960_REG_STATUS_GINT)
+ apds9960_read_gesture_fifo(data);
+
+ return IRQ_HANDLED;
+}
+
+static int apds9960_set_powermode(struct apds9960_data *data, bool state)
+{
+ return regmap_update_bits(data->regmap, APDS9960_REG_ENABLE, 1, state);
+}
+
+static int apds9960_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = regmap_field_write(data->reg_int_ges, 1);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_write(data->reg_enable_ges, 1);
+ if (ret)
+ return ret;
+
+ pm_runtime_get_sync(&data->client->dev);
+
+ return 0;
+}
+
+static int apds9960_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct apds9960_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = regmap_field_write(data->reg_enable_ges, 0);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_write(data->reg_int_ges, 0);
+ if (ret)
+ return ret;
+
+ pm_runtime_put_autosuspend(&data->client->dev);
+
+ return 0;
+}
+
+static const struct iio_buffer_setup_ops apds9960_buffer_setup_ops = {
+ .postenable = apds9960_buffer_postenable,
+ .predisable = apds9960_buffer_predisable,
+};
+
+static int apds9960_regfield_init(struct apds9960_data *data)
+{
+ struct device *dev = &data->client->dev;
+ struct regmap *regmap = data->regmap;
+
+ data->reg_int_als = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_int_als);
+ if (IS_ERR(data->reg_int_als)) {
+ dev_err(dev, "INT ALS reg field init failed\n");
+ return PTR_ERR(data->reg_int_als);
+ }
+
+ data->reg_int_ges = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_int_ges);
+ if (IS_ERR(data->reg_int_ges)) {
+ dev_err(dev, "INT gesture reg field init failed\n");
+ return PTR_ERR(data->reg_int_ges);
+ }
+
+ data->reg_int_pxs = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_int_pxs);
+ if (IS_ERR(data->reg_int_pxs)) {
+ dev_err(dev, "INT pxs reg field init failed\n");
+ return PTR_ERR(data->reg_int_pxs);
+ }
+
+ data->reg_enable_als = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_enable_als);
+ if (IS_ERR(data->reg_enable_als)) {
+ dev_err(dev, "Enable ALS reg field init failed\n");
+ return PTR_ERR(data->reg_enable_als);
+ }
+
+ data->reg_enable_ges = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_enable_ges);
+ if (IS_ERR(data->reg_enable_ges)) {
+ dev_err(dev, "Enable gesture reg field init failed\n");
+ return PTR_ERR(data->reg_enable_ges);
+ }
+
+ data->reg_enable_pxs = devm_regmap_field_alloc(dev, regmap,
+ apds9960_reg_field_enable_pxs);
+ if (IS_ERR(data->reg_enable_pxs)) {
+ dev_err(dev, "Enable PXS reg field init failed\n");
+ return PTR_ERR(data->reg_enable_pxs);
+ }
+
+ return 0;
+}
+
+static int apds9960_chip_init(struct apds9960_data *data)
+{
+ int ret;
+
+ /* Default IT for ALS of 28 ms */
+ ret = apds9960_set_it_time(data, 28000);
+ if (ret)
+ return ret;
+
+ /* Ensure gesture interrupt is OFF */
+ ret = regmap_field_write(data->reg_int_ges, 0);
+ if (ret)
+ return ret;
+
+ /* Disable gesture sensor, since polling is useless from user-space */
+ ret = regmap_field_write(data->reg_enable_ges, 0);
+ if (ret)
+ return ret;
+
+ /* Ensure proximity interrupt is OFF */
+ ret = regmap_field_write(data->reg_int_pxs, 0);
+ if (ret)
+ return ret;
+
+ /* Enable proximity sensor for polling */
+ ret = regmap_field_write(data->reg_enable_pxs, 1);
+ if (ret)
+ return ret;
+
+ /* Ensure ALS interrupt is OFF */
+ ret = regmap_field_write(data->reg_int_als, 0);
+ if (ret)
+ return ret;
+
+ /* Enable ALS sensor for polling */
+ ret = regmap_field_write(data->reg_enable_als, 1);
+ if (ret)
+ return ret;
+ /*
+ * When enabled trigger an interrupt after 3 readings
+ * outside threshold for ALS + PXS
+ */
+ ret = regmap_write(data->regmap, APDS9960_REG_PERS,
+ APDS9960_DEFAULT_PERS);
+ if (ret)
+ return ret;
+
+ /*
+ * Wait for 4 event outside gesture threshold to prevent interrupt
+ * flooding.
+ */
+ ret = regmap_update_bits(data->regmap, APDS9960_REG_GCONF_1,
+ APDS9960_REG_GCONF_1_GFIFO_THRES_MASK,
+ BIT(0) << APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT);
+ if (ret)
+ return ret;
+
+ /* Default ENTER and EXIT thresholds for the GESTURE engine. */
+ ret = regmap_write(data->regmap, APDS9960_REG_GPENTH,
+ APDS9960_DEFAULT_GPENTH);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(data->regmap, APDS9960_REG_GEXTH,
+ APDS9960_DEFAULT_GEXTH);
+ if (ret)
+ return ret;
+
+ return apds9960_set_powermode(data, 1);
+}
+
+static int apds9960_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct apds9960_data *data;
+ struct iio_buffer *buffer;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ buffer = devm_iio_kfifo_allocate(&client->dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &apds9960_info;
+ indio_dev->name = APDS9960_DRV_NAME;
+ indio_dev->channels = apds9960_channels;
+ indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
+ indio_dev->available_scan_masks = apds9960_scan_masks;
+ indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
+ indio_dev->setup_ops = &apds9960_buffer_setup_ops;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+
+ data->regmap = devm_regmap_init_i2c(client, &apds9960_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ dev_err(&client->dev, "regmap initialization failed.\n");
+ return PTR_ERR(data->regmap);
+ }
+
+ data->client = client;
+ data->indio_dev = indio_dev;
+ mutex_init(&data->lock);
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret)
+ goto error_power_down;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, 5000);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ apds9960_set_power_state(data, true);
+
+ ret = apds9960_regfield_init(data);
+ if (ret)
+ goto error_power_down;
+
+ ret = apds9960_chip_init(data);
+ if (ret)
+ goto error_power_down;
+
+ if (client->irq <= 0) {
+ dev_err(&client->dev, "no valid irq defined\n");
+ ret = -EINVAL;
+ goto error_power_down;
+ }
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, apds9960_interrupt_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "apds9960_event",
+ indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
+ goto error_power_down;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_power_down;
+
+ apds9960_set_power_state(data, false);
+
+ return 0;
+
+error_power_down:
+ apds9960_set_power_state(data, false);
+
+ return ret;
+}
+
+static int apds9960_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct apds9960_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ apds9960_set_powermode(data, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int apds9960_runtime_suspend(struct device *dev)
+{
+ struct apds9960_data *data =
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ return apds9960_set_powermode(data, 0);
+}
+
+static int apds9960_runtime_resume(struct device *dev)
+{
+ struct apds9960_data *data =
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ return apds9960_set_powermode(data, 1);
+}
+#endif
+
+static const struct dev_pm_ops apds9960_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(apds9960_runtime_suspend,
+ apds9960_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id apds9960_id[] = {
+ { "apds9960", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, apds9960_id);
+
+static const struct of_device_id apds9960_of_match[] = {
+ { .compatible = "avago,apds9960" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, apds9960_of_match);
+
+static struct i2c_driver apds9960_driver = {
+ .driver = {
+ .name = APDS9960_DRV_NAME,
+ .of_match_table = apds9960_of_match,
+ .pm = &apds9960_pm_ops,
+ },
+ .probe = apds9960_probe,
+ .remove = apds9960_remove,
+ .id_table = apds9960_id,
+};
+module_i2c_driver(apds9960_driver);
+
+MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
+MODULE_DESCRIPTION("ADPS9960 Gesture/RGB/ALS/Proximity sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/bh1750.c b/drivers/iio/light/bh1750.c
new file mode 100644
index 0000000..a814828
--- /dev/null
+++ b/drivers/iio/light/bh1750.c
@@ -0,0 +1,332 @@
+/*
+ * ROHM BH1710/BH1715/BH1721/BH1750/BH1751 ambient light sensor driver
+ *
+ * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Data sheets:
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1710fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1715fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1721fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1750fvi-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1751fvi-e.pdf
+ *
+ * 7-bit I2C slave addresses:
+ * 0x23 (ADDR pin low)
+ * 0x5C (ADDR pin high)
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/module.h>
+
+#define BH1750_POWER_DOWN 0x00
+#define BH1750_ONE_TIME_H_RES_MODE 0x20 /* auto-mode for BH1721 */
+#define BH1750_CHANGE_INT_TIME_H_BIT 0x40
+#define BH1750_CHANGE_INT_TIME_L_BIT 0x60
+
+enum {
+ BH1710,
+ BH1721,
+ BH1750,
+};
+
+struct bh1750_chip_info;
+struct bh1750_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ const struct bh1750_chip_info *chip_info;
+ u16 mtreg;
+};
+
+struct bh1750_chip_info {
+ u16 mtreg_min;
+ u16 mtreg_max;
+ u16 mtreg_default;
+ int mtreg_to_usec;
+ int mtreg_to_scale;
+
+ /*
+ * For BH1710/BH1721 all possible integration time values won't fit
+ * into one page so displaying is limited to every second one.
+ * Note, that user can still write proper values which were not
+ * listed.
+ */
+ int inc;
+
+ u16 int_time_low_mask;
+ u16 int_time_high_mask;
+}
+
+static const bh1750_chip_info_tbl[] = {
+ [BH1710] = { 140, 1022, 300, 400, 250000000, 2, 0x001F, 0x03E0 },
+ [BH1721] = { 140, 1020, 300, 400, 250000000, 2, 0x0010, 0x03E0 },
+ [BH1750] = { 31, 254, 69, 1740, 57500000, 1, 0x001F, 0x00E0 },
+};
+
+static int bh1750_change_int_time(struct bh1750_data *data, int usec)
+{
+ int ret;
+ u16 val;
+ u8 regval;
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ if ((usec % chip_info->mtreg_to_usec) != 0)
+ return -EINVAL;
+
+ val = usec / chip_info->mtreg_to_usec;
+ if (val < chip_info->mtreg_min || val > chip_info->mtreg_max)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_byte(data->client, BH1750_POWER_DOWN);
+ if (ret < 0)
+ return ret;
+
+ regval = (val & chip_info->int_time_high_mask) >> 5;
+ ret = i2c_smbus_write_byte(data->client,
+ BH1750_CHANGE_INT_TIME_H_BIT | regval);
+ if (ret < 0)
+ return ret;
+
+ regval = val & chip_info->int_time_low_mask;
+ ret = i2c_smbus_write_byte(data->client,
+ BH1750_CHANGE_INT_TIME_L_BIT | regval);
+ if (ret < 0)
+ return ret;
+
+ data->mtreg = val;
+
+ return 0;
+}
+
+static int bh1750_read(struct bh1750_data *data, int *val)
+{
+ int ret;
+ __be16 result;
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+ unsigned long delay = chip_info->mtreg_to_usec * data->mtreg;
+
+ /*
+ * BH1721 will enter continuous mode on receiving this command.
+ * Note, that this eliminates need for bh1750_resume().
+ */
+ ret = i2c_smbus_write_byte(data->client, BH1750_ONE_TIME_H_RES_MODE);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(delay + 15000, delay + 40000);
+
+ ret = i2c_master_recv(data->client, (char *)&result, 2);
+ if (ret < 0)
+ return ret;
+
+ *val = be16_to_cpu(result);
+
+ return 0;
+}
+
+static int bh1750_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret, tmp;
+ struct bh1750_data *data = iio_priv(indio_dev);
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ mutex_lock(&data->lock);
+ ret = bh1750_read(data, val);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ tmp = chip_info->mtreg_to_scale / data->mtreg;
+ *val = tmp / 1000000;
+ *val2 = tmp % 1000000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = chip_info->mtreg_to_usec * data->mtreg;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bh1750_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret;
+ struct bh1750_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = bh1750_change_int_time(data, val2);
+ mutex_unlock(&data->lock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t bh1750_show_int_time_available(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int i;
+ size_t len = 0;
+ struct bh1750_data *data = iio_priv(dev_to_iio_dev(dev));
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ for (i = chip_info->mtreg_min; i <= chip_info->mtreg_max; i += chip_info->inc)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06d ",
+ chip_info->mtreg_to_usec * i);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_INT_TIME_AVAIL(bh1750_show_int_time_available);
+
+static struct attribute *bh1750_attributes[] = {
+ &iio_dev_attr_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group bh1750_attribute_group = {
+ .attrs = bh1750_attributes,
+};
+
+static const struct iio_info bh1750_info = {
+ .attrs = &bh1750_attribute_group,
+ .read_raw = bh1750_read_raw,
+ .write_raw = bh1750_write_raw,
+};
+
+static const struct iio_chan_spec bh1750_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME)
+ }
+};
+
+static int bh1750_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret, usec;
+ struct bh1750_data *data;
+ struct iio_dev *indio_dev;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
+ I2C_FUNC_SMBUS_WRITE_BYTE))
+ return -EOPNOTSUPP;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->chip_info = &bh1750_chip_info_tbl[id->driver_data];
+
+ usec = data->chip_info->mtreg_to_usec * data->chip_info->mtreg_default;
+ ret = bh1750_change_int_time(data, usec);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &bh1750_info;
+ indio_dev->name = id->name;
+ indio_dev->channels = bh1750_channels;
+ indio_dev->num_channels = ARRAY_SIZE(bh1750_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return iio_device_register(indio_dev);
+}
+
+static int bh1750_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bh1750_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ mutex_lock(&data->lock);
+ i2c_smbus_write_byte(client, BH1750_POWER_DOWN);
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bh1750_suspend(struct device *dev)
+{
+ int ret;
+ struct bh1750_data *data =
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ /*
+ * This is mainly for BH1721 which doesn't enter power down
+ * mode automatically.
+ */
+ mutex_lock(&data->lock);
+ ret = i2c_smbus_write_byte(data->client, BH1750_POWER_DOWN);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(bh1750_pm_ops, bh1750_suspend, NULL);
+#define BH1750_PM_OPS (&bh1750_pm_ops)
+#else
+#define BH1750_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id bh1750_id[] = {
+ { "bh1710", BH1710 },
+ { "bh1715", BH1750 },
+ { "bh1721", BH1721 },
+ { "bh1750", BH1750 },
+ { "bh1751", BH1750 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bh1750_id);
+
+static struct i2c_driver bh1750_driver = {
+ .driver = {
+ .name = "bh1750",
+ .pm = BH1750_PM_OPS,
+ },
+ .probe = bh1750_probe,
+ .remove = bh1750_remove,
+ .id_table = bh1750_id,
+
+};
+module_i2c_driver(bh1750_driver);
+
+MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
+MODULE_DESCRIPTION("ROHM BH1710/BH1715/BH1721/BH1750/BH1751 als driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/bh1780.c b/drivers/iio/light/bh1780.c
new file mode 100644
index 0000000..036f3bb
--- /dev/null
+++ b/drivers/iio/light/bh1780.c
@@ -0,0 +1,298 @@
+/*
+ * ROHM 1780GLI Ambient Light Sensor Driver
+ *
+ * Copyright (C) 2016 Linaro Ltd.
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ * Loosely based on the previous BH1780 ALS misc driver
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@ti.com>
+ */
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/pm_runtime.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/bitops.h>
+
+#define BH1780_CMD_BIT BIT(7)
+#define BH1780_REG_CONTROL 0x00
+#define BH1780_REG_PARTID 0x0A
+#define BH1780_REG_MANFID 0x0B
+#define BH1780_REG_DLOW 0x0C
+#define BH1780_REG_DHIGH 0x0D
+
+#define BH1780_REVMASK GENMASK(3,0)
+#define BH1780_POWMASK GENMASK(1,0)
+#define BH1780_POFF (0x0)
+#define BH1780_PON (0x3)
+
+/* power on settling time in ms */
+#define BH1780_PON_DELAY 2
+/* max time before value available in ms */
+#define BH1780_INTERVAL 250
+
+struct bh1780_data {
+ struct i2c_client *client;
+};
+
+static int bh1780_write(struct bh1780_data *bh1780, u8 reg, u8 val)
+{
+ int ret = i2c_smbus_write_byte_data(bh1780->client,
+ BH1780_CMD_BIT | reg,
+ val);
+ if (ret < 0)
+ dev_err(&bh1780->client->dev,
+ "i2c_smbus_write_byte_data failed error "
+ "%d, register %01x\n",
+ ret, reg);
+ return ret;
+}
+
+static int bh1780_read(struct bh1780_data *bh1780, u8 reg)
+{
+ int ret = i2c_smbus_read_byte_data(bh1780->client,
+ BH1780_CMD_BIT | reg);
+ if (ret < 0)
+ dev_err(&bh1780->client->dev,
+ "i2c_smbus_read_byte_data failed error "
+ "%d, register %01x\n",
+ ret, reg);
+ return ret;
+}
+
+static int bh1780_read_word(struct bh1780_data *bh1780, u8 reg)
+{
+ int ret = i2c_smbus_read_word_data(bh1780->client,
+ BH1780_CMD_BIT | reg);
+ if (ret < 0)
+ dev_err(&bh1780->client->dev,
+ "i2c_smbus_read_word_data failed error "
+ "%d, register %01x\n",
+ ret, reg);
+ return ret;
+}
+
+static int bh1780_debugfs_reg_access(struct iio_dev *indio_dev,
+ unsigned int reg, unsigned int writeval,
+ unsigned int *readval)
+{
+ struct bh1780_data *bh1780 = iio_priv(indio_dev);
+ int ret;
+
+ if (!readval)
+ return bh1780_write(bh1780, (u8)reg, (u8)writeval);
+
+ ret = bh1780_read(bh1780, (u8)reg);
+ if (ret < 0)
+ return ret;
+
+ *readval = ret;
+
+ return 0;
+}
+
+static int bh1780_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct bh1780_data *bh1780 = iio_priv(indio_dev);
+ int value;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ pm_runtime_get_sync(&bh1780->client->dev);
+ value = bh1780_read_word(bh1780, BH1780_REG_DLOW);
+ if (value < 0)
+ return value;
+ pm_runtime_mark_last_busy(&bh1780->client->dev);
+ pm_runtime_put_autosuspend(&bh1780->client->dev);
+ *val = value;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = BH1780_INTERVAL * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info bh1780_info = {
+ .read_raw = bh1780_read_raw,
+ .debugfs_reg_access = bh1780_debugfs_reg_access,
+};
+
+static const struct iio_chan_spec bh1780_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME)
+ }
+};
+
+static int bh1780_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct bh1780_data *bh1780;
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct iio_dev *indio_dev;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
+ return -EIO;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*bh1780));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ bh1780 = iio_priv(indio_dev);
+ bh1780->client = client;
+ i2c_set_clientdata(client, indio_dev);
+
+ /* Power up the device */
+ ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_PON);
+ if (ret < 0)
+ return ret;
+ msleep(BH1780_PON_DELAY);
+ pm_runtime_get_noresume(&client->dev);
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_enable(&client->dev);
+
+ ret = bh1780_read(bh1780, BH1780_REG_PARTID);
+ if (ret < 0)
+ goto out_disable_pm;
+ dev_info(&client->dev,
+ "Ambient Light Sensor, Rev : %lu\n",
+ (ret & BH1780_REVMASK));
+
+ /*
+ * As the device takes 250 ms to even come up with a fresh
+ * measurement after power-on, do not shut it down unnecessarily.
+ * Set autosuspend to a five seconds.
+ */
+ pm_runtime_set_autosuspend_delay(&client->dev, 5000);
+ pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_put(&client->dev);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &bh1780_info;
+ indio_dev->name = "bh1780";
+ indio_dev->channels = bh1780_channels;
+ indio_dev->num_channels = ARRAY_SIZE(bh1780_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto out_disable_pm;
+ return 0;
+
+out_disable_pm:
+ pm_runtime_put_noidle(&client->dev);
+ pm_runtime_disable(&client->dev);
+ return ret;
+}
+
+static int bh1780_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bh1780_data *bh1780 = iio_priv(indio_dev);
+ int ret;
+
+ iio_device_unregister(indio_dev);
+ pm_runtime_get_sync(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+ pm_runtime_disable(&client->dev);
+ ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_POFF);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to power off\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bh1780_runtime_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bh1780_data *bh1780 = iio_priv(indio_dev);
+ int ret;
+
+ ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_POFF);
+ if (ret < 0) {
+ dev_err(dev, "failed to runtime suspend\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int bh1780_runtime_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bh1780_data *bh1780 = iio_priv(indio_dev);
+ int ret;
+
+ ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_PON);
+ if (ret < 0) {
+ dev_err(dev, "failed to runtime resume\n");
+ return ret;
+ }
+
+ /* Wait for power on, then for a value to be available */
+ msleep(BH1780_PON_DELAY + BH1780_INTERVAL);
+
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops bh1780_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(bh1780_runtime_suspend,
+ bh1780_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id bh1780_id[] = {
+ { "bh1780", 0 },
+ { },
+};
+
+MODULE_DEVICE_TABLE(i2c, bh1780_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id of_bh1780_match[] = {
+ { .compatible = "rohm,bh1780gli", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_bh1780_match);
+#endif
+
+static struct i2c_driver bh1780_driver = {
+ .probe = bh1780_probe,
+ .remove = bh1780_remove,
+ .id_table = bh1780_id,
+ .driver = {
+ .name = "bh1780",
+ .pm = &bh1780_dev_pm_ops,
+ .of_match_table = of_match_ptr(of_bh1780_match),
+ },
+};
+
+module_i2c_driver(bh1780_driver);
+
+MODULE_DESCRIPTION("ROHM BH1780GLI Ambient Light Sensor Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c
new file mode 100644
index 0000000..aebf7dd
--- /dev/null
+++ b/drivers/iio/light/cm32181.c
@@ -0,0 +1,370 @@
+/*
+ * Copyright (C) 2013 Capella Microsystems Inc.
+ * Author: Kevin Tsai <ktsai@capellamicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/init.h>
+
+/* Registers Address */
+#define CM32181_REG_ADDR_CMD 0x00
+#define CM32181_REG_ADDR_ALS 0x04
+#define CM32181_REG_ADDR_STATUS 0x06
+#define CM32181_REG_ADDR_ID 0x07
+
+/* Number of Configurable Registers */
+#define CM32181_CONF_REG_NUM 0x01
+
+/* CMD register */
+#define CM32181_CMD_ALS_ENABLE 0x00
+#define CM32181_CMD_ALS_DISABLE 0x01
+#define CM32181_CMD_ALS_INT_EN 0x02
+
+#define CM32181_CMD_ALS_IT_SHIFT 6
+#define CM32181_CMD_ALS_IT_MASK (0x0F << CM32181_CMD_ALS_IT_SHIFT)
+#define CM32181_CMD_ALS_IT_DEFAULT (0x00 << CM32181_CMD_ALS_IT_SHIFT)
+
+#define CM32181_CMD_ALS_SM_SHIFT 11
+#define CM32181_CMD_ALS_SM_MASK (0x03 << CM32181_CMD_ALS_SM_SHIFT)
+#define CM32181_CMD_ALS_SM_DEFAULT (0x01 << CM32181_CMD_ALS_SM_SHIFT)
+
+#define CM32181_MLUX_PER_BIT 5 /* ALS_SM=01 IT=800ms */
+#define CM32181_MLUX_PER_BIT_BASE_IT 800000 /* Based on IT=800ms */
+#define CM32181_CALIBSCALE_DEFAULT 1000
+#define CM32181_CALIBSCALE_RESOLUTION 1000
+#define MLUX_PER_LUX 1000
+
+static const u8 cm32181_reg[CM32181_CONF_REG_NUM] = {
+ CM32181_REG_ADDR_CMD,
+};
+
+static const int als_it_bits[] = {12, 8, 0, 1, 2, 3};
+static const int als_it_value[] = {25000, 50000, 100000, 200000, 400000,
+ 800000};
+
+struct cm32181_chip {
+ struct i2c_client *client;
+ struct mutex lock;
+ u16 conf_regs[CM32181_CONF_REG_NUM];
+ int calibscale;
+};
+
+/**
+ * cm32181_reg_init() - Initialize CM32181 registers
+ * @cm32181: pointer of struct cm32181.
+ *
+ * Initialize CM32181 ambient light sensor register to default values.
+ *
+ * Return: 0 for success; otherwise for error code.
+ */
+static int cm32181_reg_init(struct cm32181_chip *cm32181)
+{
+ struct i2c_client *client = cm32181->client;
+ int i;
+ s32 ret;
+
+ ret = i2c_smbus_read_word_data(client, CM32181_REG_ADDR_ID);
+ if (ret < 0)
+ return ret;
+
+ /* check device ID */
+ if ((ret & 0xFF) != 0x81)
+ return -ENODEV;
+
+ /* Default Values */
+ cm32181->conf_regs[CM32181_REG_ADDR_CMD] = CM32181_CMD_ALS_ENABLE |
+ CM32181_CMD_ALS_IT_DEFAULT | CM32181_CMD_ALS_SM_DEFAULT;
+ cm32181->calibscale = CM32181_CALIBSCALE_DEFAULT;
+
+ /* Initialize registers*/
+ for (i = 0; i < CM32181_CONF_REG_NUM; i++) {
+ ret = i2c_smbus_write_word_data(client, cm32181_reg[i],
+ cm32181->conf_regs[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/**
+ * cm32181_read_als_it() - Get sensor integration time (ms)
+ * @cm32181: pointer of struct cm32181
+ * @val2: pointer of int to load the als_it value.
+ *
+ * Report the current integartion time by millisecond.
+ *
+ * Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL.
+ */
+static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val2)
+{
+ u16 als_it;
+ int i;
+
+ als_it = cm32181->conf_regs[CM32181_REG_ADDR_CMD];
+ als_it &= CM32181_CMD_ALS_IT_MASK;
+ als_it >>= CM32181_CMD_ALS_IT_SHIFT;
+ for (i = 0; i < ARRAY_SIZE(als_it_bits); i++) {
+ if (als_it == als_it_bits[i]) {
+ *val2 = als_it_value[i];
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * cm32181_write_als_it() - Write sensor integration time
+ * @cm32181: pointer of struct cm32181.
+ * @val: integration time by millisecond.
+ *
+ * Convert integration time (ms) to sensor value.
+ *
+ * Return: i2c_smbus_write_word_data command return value.
+ */
+static int cm32181_write_als_it(struct cm32181_chip *cm32181, int val)
+{
+ struct i2c_client *client = cm32181->client;
+ u16 als_it;
+ int ret, i, n;
+
+ n = ARRAY_SIZE(als_it_value);
+ for (i = 0; i < n; i++)
+ if (val <= als_it_value[i])
+ break;
+ if (i >= n)
+ i = n - 1;
+
+ als_it = als_it_bits[i];
+ als_it <<= CM32181_CMD_ALS_IT_SHIFT;
+
+ mutex_lock(&cm32181->lock);
+ cm32181->conf_regs[CM32181_REG_ADDR_CMD] &=
+ ~CM32181_CMD_ALS_IT_MASK;
+ cm32181->conf_regs[CM32181_REG_ADDR_CMD] |=
+ als_it;
+ ret = i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD,
+ cm32181->conf_regs[CM32181_REG_ADDR_CMD]);
+ mutex_unlock(&cm32181->lock);
+
+ return ret;
+}
+
+/**
+ * cm32181_get_lux() - report current lux value
+ * @cm32181: pointer of struct cm32181.
+ *
+ * Convert sensor raw data to lux. It depends on integration
+ * time and calibscale variable.
+ *
+ * Return: Positive value is lux, otherwise is error code.
+ */
+static int cm32181_get_lux(struct cm32181_chip *cm32181)
+{
+ struct i2c_client *client = cm32181->client;
+ int ret;
+ int als_it;
+ unsigned long lux;
+
+ ret = cm32181_read_als_it(cm32181, &als_it);
+ if (ret < 0)
+ return -EINVAL;
+
+ lux = CM32181_MLUX_PER_BIT;
+ lux *= CM32181_MLUX_PER_BIT_BASE_IT;
+ lux /= als_it;
+
+ ret = i2c_smbus_read_word_data(client, CM32181_REG_ADDR_ALS);
+ if (ret < 0)
+ return ret;
+
+ lux *= ret;
+ lux *= cm32181->calibscale;
+ lux /= CM32181_CALIBSCALE_RESOLUTION;
+ lux /= MLUX_PER_LUX;
+
+ if (lux > 0xFFFF)
+ lux = 0xFFFF;
+
+ return lux;
+}
+
+static int cm32181_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cm32181_chip *cm32181 = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = cm32181_get_lux(cm32181);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ *val = cm32181->calibscale;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ ret = cm32181_read_als_it(cm32181, val2);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int cm32181_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct cm32181_chip *cm32181 = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ cm32181->calibscale = val;
+ return val;
+ case IIO_CHAN_INFO_INT_TIME:
+ ret = cm32181_write_als_it(cm32181, val2);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * cm32181_get_it_available() - Get available ALS IT value
+ * @dev: pointer of struct device.
+ * @attr: pointer of struct device_attribute.
+ * @buf: pointer of return string buffer.
+ *
+ * Display the available integration time values by millisecond.
+ *
+ * Return: string length.
+ */
+static ssize_t cm32181_get_it_available(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int i, n, len;
+
+ n = ARRAY_SIZE(als_it_value);
+ for (i = 0, len = 0; i < n; i++)
+ len += sprintf(buf + len, "0.%06u ", als_it_value[i]);
+ return len + sprintf(buf + len, "\n");
+}
+
+static const struct iio_chan_spec cm32181_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ }
+};
+
+static IIO_DEVICE_ATTR(in_illuminance_integration_time_available,
+ S_IRUGO, cm32181_get_it_available, NULL, 0);
+
+static struct attribute *cm32181_attributes[] = {
+ &iio_dev_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group cm32181_attribute_group = {
+ .attrs = cm32181_attributes
+};
+
+static const struct iio_info cm32181_info = {
+ .read_raw = &cm32181_read_raw,
+ .write_raw = &cm32181_write_raw,
+ .attrs = &cm32181_attribute_group,
+};
+
+static int cm32181_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cm32181_chip *cm32181;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm32181));
+ if (!indio_dev) {
+ dev_err(&client->dev, "devm_iio_device_alloc failed\n");
+ return -ENOMEM;
+ }
+
+ cm32181 = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ cm32181->client = client;
+
+ mutex_init(&cm32181->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = cm32181_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm32181_channels);
+ indio_dev->info = &cm32181_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = cm32181_reg_init(cm32181);
+ if (ret) {
+ dev_err(&client->dev,
+ "%s: register init failed\n",
+ __func__);
+ return ret;
+ }
+
+ ret = devm_iio_device_register(&client->dev, indio_dev);
+ if (ret) {
+ dev_err(&client->dev,
+ "%s: regist device failed\n",
+ __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id cm32181_id[] = {
+ { "cm32181", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, cm32181_id);
+
+static const struct of_device_id cm32181_of_match[] = {
+ { .compatible = "capella,cm32181" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, cm32181_of_match);
+
+static struct i2c_driver cm32181_driver = {
+ .driver = {
+ .name = "cm32181",
+ .of_match_table = of_match_ptr(cm32181_of_match),
+ },
+ .id_table = cm32181_id,
+ .probe = cm32181_probe,
+};
+
+module_i2c_driver(cm32181_driver);
+
+MODULE_AUTHOR("Kevin Tsai <ktsai@capellamicro.com>");
+MODULE_DESCRIPTION("CM32181 ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/cm3232.c b/drivers/iio/light/cm3232.c
new file mode 100644
index 0000000..c639cf2
--- /dev/null
+++ b/drivers/iio/light/cm3232.c
@@ -0,0 +1,438 @@
+/*
+ * CM3232 Ambient Light Sensor
+ *
+ * Copyright (C) 2014-2015 Capella Microsystems Inc.
+ * Author: Kevin Tsai <ktsai@capellamicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published
+ * by the Free Software Foundation.
+ *
+ * IIO driver for CM3232 (7-bit I2C slave address 0x10).
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/init.h>
+
+/* Registers Address */
+#define CM3232_REG_ADDR_CMD 0x00
+#define CM3232_REG_ADDR_ALS 0x50
+#define CM3232_REG_ADDR_ID 0x53
+
+#define CM3232_CMD_ALS_DISABLE BIT(0)
+
+#define CM3232_CMD_ALS_IT_SHIFT 2
+#define CM3232_CMD_ALS_IT_MASK (BIT(2) | BIT(3) | BIT(4))
+#define CM3232_CMD_ALS_IT_DEFAULT (0x01 << CM3232_CMD_ALS_IT_SHIFT)
+
+#define CM3232_CMD_ALS_RESET BIT(6)
+
+#define CM3232_CMD_DEFAULT CM3232_CMD_ALS_IT_DEFAULT
+
+#define CM3232_HW_ID 0x32
+#define CM3232_CALIBSCALE_DEFAULT 100000
+#define CM3232_CALIBSCALE_RESOLUTION 100000
+#define CM3232_MLUX_PER_LUX 1000
+
+#define CM3232_MLUX_PER_BIT_DEFAULT 64
+#define CM3232_MLUX_PER_BIT_BASE_IT 100000
+
+static const struct {
+ int val;
+ int val2;
+ u8 it;
+} cm3232_als_it_scales[] = {
+ {0, 100000, 0}, /* 0.100000 */
+ {0, 200000, 1}, /* 0.200000 */
+ {0, 400000, 2}, /* 0.400000 */
+ {0, 800000, 3}, /* 0.800000 */
+ {1, 600000, 4}, /* 1.600000 */
+ {3, 200000, 5}, /* 3.200000 */
+};
+
+struct cm3232_als_info {
+ u8 regs_cmd_default;
+ u8 hw_id;
+ int calibscale;
+ int mlux_per_bit;
+ int mlux_per_bit_base_it;
+};
+
+static struct cm3232_als_info cm3232_als_info_default = {
+ .regs_cmd_default = CM3232_CMD_DEFAULT,
+ .hw_id = CM3232_HW_ID,
+ .calibscale = CM3232_CALIBSCALE_DEFAULT,
+ .mlux_per_bit = CM3232_MLUX_PER_BIT_DEFAULT,
+ .mlux_per_bit_base_it = CM3232_MLUX_PER_BIT_BASE_IT,
+};
+
+struct cm3232_chip {
+ struct i2c_client *client;
+ struct cm3232_als_info *als_info;
+ u8 regs_cmd;
+ u16 regs_als;
+};
+
+/**
+ * cm3232_reg_init() - Initialize CM3232
+ * @chip: pointer of struct cm3232_chip.
+ *
+ * Check and initialize CM3232 ambient light sensor.
+ *
+ * Return: 0 for success; otherwise for error code.
+ */
+static int cm3232_reg_init(struct cm3232_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ s32 ret;
+
+ chip->als_info = &cm3232_als_info_default;
+
+ /* Identify device */
+ ret = i2c_smbus_read_word_data(client, CM3232_REG_ADDR_ID);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "Error reading addr_id\n");
+ return ret;
+ }
+
+ if ((ret & 0xFF) != chip->als_info->hw_id)
+ return -ENODEV;
+
+ /* Disable and reset device */
+ chip->regs_cmd = CM3232_CMD_ALS_DISABLE | CM3232_CMD_ALS_RESET;
+ ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD,
+ chip->regs_cmd);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "Error writing reg_cmd\n");
+ return ret;
+ }
+
+ /* Register default value */
+ chip->regs_cmd = chip->als_info->regs_cmd_default;
+
+ /* Configure register */
+ ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD,
+ chip->regs_cmd);
+ if (ret < 0)
+ dev_err(&chip->client->dev, "Error writing reg_cmd\n");
+
+ return ret;
+}
+
+/**
+ * cm3232_read_als_it() - Get sensor integration time
+ * @chip: pointer of struct cm3232_chip
+ * @val: pointer of int to load the integration (sec).
+ * @val2: pointer of int to load the integration time (microsecond).
+ *
+ * Report the current integration time.
+ *
+ * Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL.
+ */
+static int cm3232_read_als_it(struct cm3232_chip *chip, int *val, int *val2)
+{
+ u16 als_it;
+ int i;
+
+ als_it = chip->regs_cmd;
+ als_it &= CM3232_CMD_ALS_IT_MASK;
+ als_it >>= CM3232_CMD_ALS_IT_SHIFT;
+ for (i = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++) {
+ if (als_it == cm3232_als_it_scales[i].it) {
+ *val = cm3232_als_it_scales[i].val;
+ *val2 = cm3232_als_it_scales[i].val2;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * cm3232_write_als_it() - Write sensor integration time
+ * @chip: pointer of struct cm3232_chip.
+ * @val: integration time in second.
+ * @val2: integration time in microsecond.
+ *
+ * Convert integration time to sensor value.
+ *
+ * Return: i2c_smbus_write_byte_data command return value.
+ */
+static int cm3232_write_als_it(struct cm3232_chip *chip, int val, int val2)
+{
+ struct i2c_client *client = chip->client;
+ u16 als_it, cmd;
+ int i;
+ s32 ret;
+
+ for (i = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++) {
+ if (val == cm3232_als_it_scales[i].val &&
+ val2 == cm3232_als_it_scales[i].val2) {
+
+ als_it = cm3232_als_it_scales[i].it;
+ als_it <<= CM3232_CMD_ALS_IT_SHIFT;
+
+ cmd = chip->regs_cmd & ~CM3232_CMD_ALS_IT_MASK;
+ cmd |= als_it;
+ ret = i2c_smbus_write_byte_data(client,
+ CM3232_REG_ADDR_CMD,
+ cmd);
+ if (ret < 0)
+ return ret;
+ chip->regs_cmd = cmd;
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+/**
+ * cm3232_get_lux() - report current lux value
+ * @chip: pointer of struct cm3232_chip.
+ *
+ * Convert sensor data to lux. It depends on integration
+ * time and calibscale variable.
+ *
+ * Return: Zero or positive value is lux, otherwise error code.
+ */
+static int cm3232_get_lux(struct cm3232_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ struct cm3232_als_info *als_info = chip->als_info;
+ int ret;
+ int val, val2;
+ int als_it;
+ u64 lux;
+
+ /* Calculate mlux per bit based on als_it */
+ ret = cm3232_read_als_it(chip, &val, &val2);
+ if (ret < 0)
+ return -EINVAL;
+ als_it = val * 1000000 + val2;
+ lux = (__force u64)als_info->mlux_per_bit;
+ lux *= als_info->mlux_per_bit_base_it;
+ lux = div_u64(lux, als_it);
+
+ ret = i2c_smbus_read_word_data(client, CM3232_REG_ADDR_ALS);
+ if (ret < 0) {
+ dev_err(&client->dev, "Error reading reg_addr_als\n");
+ return ret;
+ }
+
+ chip->regs_als = (u16)ret;
+ lux *= chip->regs_als;
+ lux *= als_info->calibscale;
+ lux = div_u64(lux, CM3232_CALIBSCALE_RESOLUTION);
+ lux = div_u64(lux, CM3232_MLUX_PER_LUX);
+
+ if (lux > 0xFFFF)
+ lux = 0xFFFF;
+
+ return (int)lux;
+}
+
+static int cm3232_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cm3232_chip *chip = iio_priv(indio_dev);
+ struct cm3232_als_info *als_info = chip->als_info;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = cm3232_get_lux(chip);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ *val = als_info->calibscale;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ return cm3232_read_als_it(chip, val, val2);
+ }
+
+ return -EINVAL;
+}
+
+static int cm3232_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct cm3232_chip *chip = iio_priv(indio_dev);
+ struct cm3232_als_info *als_info = chip->als_info;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ als_info->calibscale = val;
+ return 0;
+ case IIO_CHAN_INFO_INT_TIME:
+ return cm3232_write_als_it(chip, val, val2);
+ }
+
+ return -EINVAL;
+}
+
+/**
+ * cm3232_get_it_available() - Get available ALS IT value
+ * @dev: pointer of struct device.
+ * @attr: pointer of struct device_attribute.
+ * @buf: pointer of return string buffer.
+ *
+ * Display the available integration time in second.
+ *
+ * Return: string length.
+ */
+static ssize_t cm3232_get_it_available(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int i, len;
+
+ for (i = 0, len = 0; i < ARRAY_SIZE(cm3232_als_it_scales); i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%u.%06u ",
+ cm3232_als_it_scales[i].val,
+ cm3232_als_it_scales[i].val2);
+ return len + scnprintf(buf + len, PAGE_SIZE - len, "\n");
+}
+
+static const struct iio_chan_spec cm3232_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ }
+};
+
+static IIO_DEVICE_ATTR(in_illuminance_integration_time_available,
+ S_IRUGO, cm3232_get_it_available, NULL, 0);
+
+static struct attribute *cm3232_attributes[] = {
+ &iio_dev_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group cm3232_attribute_group = {
+ .attrs = cm3232_attributes
+};
+
+static const struct iio_info cm3232_info = {
+ .read_raw = &cm3232_read_raw,
+ .write_raw = &cm3232_write_raw,
+ .attrs = &cm3232_attribute_group,
+};
+
+static int cm3232_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cm3232_chip *chip;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ chip->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = cm3232_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm3232_channels);
+ indio_dev->info = &cm3232_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = cm3232_reg_init(chip);
+ if (ret) {
+ dev_err(&client->dev,
+ "%s: register init failed\n",
+ __func__);
+ return ret;
+ }
+
+ return iio_device_register(indio_dev);
+}
+
+static int cm3232_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD,
+ CM3232_CMD_ALS_DISABLE);
+
+ iio_device_unregister(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id cm3232_id[] = {
+ {"cm3232", 0},
+ {}
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int cm3232_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct cm3232_chip *chip = iio_priv(indio_dev);
+ struct i2c_client *client = chip->client;
+ int ret;
+
+ chip->regs_cmd |= CM3232_CMD_ALS_DISABLE;
+ ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD,
+ chip->regs_cmd);
+
+ return ret;
+}
+
+static int cm3232_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct cm3232_chip *chip = iio_priv(indio_dev);
+ struct i2c_client *client = chip->client;
+ int ret;
+
+ chip->regs_cmd &= ~CM3232_CMD_ALS_DISABLE;
+ ret = i2c_smbus_write_byte_data(client, CM3232_REG_ADDR_CMD,
+ chip->regs_cmd | CM3232_CMD_ALS_RESET);
+
+ return ret;
+}
+
+static const struct dev_pm_ops cm3232_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(cm3232_suspend, cm3232_resume)};
+#endif
+
+MODULE_DEVICE_TABLE(i2c, cm3232_id);
+
+static const struct of_device_id cm3232_of_match[] = {
+ {.compatible = "capella,cm3232"},
+ {}
+};
+MODULE_DEVICE_TABLE(of, cm3232_of_match);
+
+static struct i2c_driver cm3232_driver = {
+ .driver = {
+ .name = "cm3232",
+ .of_match_table = of_match_ptr(cm3232_of_match),
+#ifdef CONFIG_PM_SLEEP
+ .pm = &cm3232_pm_ops,
+#endif
+ },
+ .id_table = cm3232_id,
+ .probe = cm3232_probe,
+ .remove = cm3232_remove,
+};
+
+module_i2c_driver(cm3232_driver);
+
+MODULE_AUTHOR("Kevin Tsai <ktsai@capellamicro.com>");
+MODULE_DESCRIPTION("CM3232 ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/cm3323.c b/drivers/iio/light/cm3323.c
new file mode 100644
index 0000000..83b08b6
--- /dev/null
+++ b/drivers/iio/light/cm3323.c
@@ -0,0 +1,290 @@
+/*
+ * CM3323 - Capella Color Light Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for CM3323 (7-bit I2C slave address 0x10)
+ *
+ * TODO: calibscale to correct the lens factor
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define CM3323_DRV_NAME "cm3323"
+
+#define CM3323_CMD_CONF 0x00
+#define CM3323_CMD_RED_DATA 0x08
+#define CM3323_CMD_GREEN_DATA 0x09
+#define CM3323_CMD_BLUE_DATA 0x0A
+#define CM3323_CMD_CLEAR_DATA 0x0B
+
+#define CM3323_CONF_SD_BIT BIT(0) /* sensor disable */
+#define CM3323_CONF_AF_BIT BIT(1) /* auto/manual force mode */
+#define CM3323_CONF_IT_MASK GENMASK(6, 4)
+#define CM3323_CONF_IT_SHIFT 4
+
+#define CM3323_INT_TIME_AVAILABLE "0.04 0.08 0.16 0.32 0.64 1.28"
+
+static const struct {
+ int val;
+ int val2;
+} cm3323_int_time[] = {
+ {0, 40000}, /* 40 ms */
+ {0, 80000}, /* 80 ms */
+ {0, 160000}, /* 160 ms */
+ {0, 320000}, /* 320 ms */
+ {0, 640000}, /* 640 ms */
+ {1, 280000}, /* 1280 ms */
+};
+
+struct cm3323_data {
+ struct i2c_client *client;
+ u16 reg_conf;
+ struct mutex mutex;
+};
+
+#define CM3323_COLOR_CHANNEL(_color, _addr) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+ .address = _addr, \
+}
+
+static const struct iio_chan_spec cm3323_channels[] = {
+ CM3323_COLOR_CHANNEL(RED, CM3323_CMD_RED_DATA),
+ CM3323_COLOR_CHANNEL(GREEN, CM3323_CMD_GREEN_DATA),
+ CM3323_COLOR_CHANNEL(BLUE, CM3323_CMD_BLUE_DATA),
+ CM3323_COLOR_CHANNEL(CLEAR, CM3323_CMD_CLEAR_DATA),
+};
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL(CM3323_INT_TIME_AVAILABLE);
+
+static struct attribute *cm3323_attributes[] = {
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group cm3323_attribute_group = {
+ .attrs = cm3323_attributes,
+};
+
+static int cm3323_init(struct iio_dev *indio_dev)
+{
+ int ret;
+ struct cm3323_data *data = iio_priv(indio_dev);
+
+ ret = i2c_smbus_read_word_data(data->client, CM3323_CMD_CONF);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_conf\n");
+ return ret;
+ }
+
+ /* enable sensor and set auto force mode */
+ ret &= ~(CM3323_CONF_SD_BIT | CM3323_CONF_AF_BIT);
+
+ ret = i2c_smbus_write_word_data(data->client, CM3323_CMD_CONF, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_conf\n");
+ return ret;
+ }
+
+ data->reg_conf = ret;
+
+ return 0;
+}
+
+static void cm3323_disable(struct iio_dev *indio_dev)
+{
+ int ret;
+ struct cm3323_data *data = iio_priv(indio_dev);
+
+ ret = i2c_smbus_write_word_data(data->client, CM3323_CMD_CONF,
+ CM3323_CONF_SD_BIT);
+ if (ret < 0)
+ dev_err(&data->client->dev, "Error writing reg_conf\n");
+}
+
+static int cm3323_set_it_bits(struct cm3323_data *data, int val, int val2)
+{
+ int i, ret;
+ u16 reg_conf;
+
+ for (i = 0; i < ARRAY_SIZE(cm3323_int_time); i++) {
+ if (val == cm3323_int_time[i].val &&
+ val2 == cm3323_int_time[i].val2) {
+ reg_conf = data->reg_conf & ~CM3323_CONF_IT_MASK;
+ reg_conf |= i << CM3323_CONF_IT_SHIFT;
+
+ ret = i2c_smbus_write_word_data(data->client,
+ CM3323_CMD_CONF,
+ reg_conf);
+ if (ret < 0)
+ return ret;
+
+ data->reg_conf = reg_conf;
+
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int cm3323_get_it_bits(struct cm3323_data *data)
+{
+ int bits;
+
+ bits = (data->reg_conf & CM3323_CONF_IT_MASK) >>
+ CM3323_CONF_IT_SHIFT;
+
+ if (bits >= ARRAY_SIZE(cm3323_int_time))
+ return -EINVAL;
+
+ return bits;
+}
+
+static int cm3323_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ int ret;
+ struct cm3323_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&data->mutex);
+ ret = i2c_smbus_read_word_data(data->client, chan->address);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+ *val = ret;
+ mutex_unlock(&data->mutex);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ mutex_lock(&data->mutex);
+ ret = cm3323_get_it_bits(data);
+ if (ret < 0) {
+ mutex_unlock(&data->mutex);
+ return ret;
+ }
+
+ *val = cm3323_int_time[ret].val;
+ *val2 = cm3323_int_time[ret].val2;
+ mutex_unlock(&data->mutex);
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int cm3323_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct cm3323_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ mutex_lock(&data->mutex);
+ ret = cm3323_set_it_bits(data, val, val2);
+ mutex_unlock(&data->mutex);
+
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info cm3323_info = {
+ .read_raw = cm3323_read_raw,
+ .write_raw = cm3323_write_raw,
+ .attrs = &cm3323_attribute_group,
+};
+
+static int cm3323_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cm3323_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &cm3323_info;
+ indio_dev->name = CM3323_DRV_NAME;
+ indio_dev->channels = cm3323_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm3323_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = cm3323_init(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "cm3323 chip init failed\n");
+ return ret;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to register iio dev\n");
+ goto err_init;
+ }
+
+ return 0;
+err_init:
+ cm3323_disable(indio_dev);
+ return ret;
+}
+
+static int cm3323_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ cm3323_disable(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id cm3323_id[] = {
+ {"cm3323", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, cm3323_id);
+
+static struct i2c_driver cm3323_driver = {
+ .driver = {
+ .name = CM3323_DRV_NAME,
+ },
+ .probe = cm3323_probe,
+ .remove = cm3323_remove,
+ .id_table = cm3323_id,
+};
+
+module_i2c_driver(cm3323_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("Capella CM3323 Color Light Sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/cm3605.c b/drivers/iio/light/cm3605.c
new file mode 100644
index 0000000..e454bc6
--- /dev/null
+++ b/drivers/iio/light/cm3605.c
@@ -0,0 +1,329 @@
+/*
+ * CM3605 Ambient Light and Proximity Sensor
+ *
+ * Copyright (C) 2016 Linaro Ltd.
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This hardware was found in the very first Nexus One handset from Google/HTC
+ * and an early endavour into mobile light and proximity sensors.
+ */
+
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/consumer.h> /* To get our ADC channel */
+#include <linux/iio/types.h> /* To deal with our ADC channel */
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/math64.h>
+#include <linux/pm.h>
+
+#define CM3605_PROX_CHANNEL 0
+#define CM3605_ALS_CHANNEL 1
+#define CM3605_AOUT_TYP_MAX_MV 1550
+/* It should not go above 1.650V according to the data sheet */
+#define CM3605_AOUT_MAX_MV 1650
+
+/**
+ * struct cm3605 - CM3605 state
+ * @dev: pointer to parent device
+ * @vdd: regulator controlling VDD
+ * @aset: sleep enable GPIO, high = sleep
+ * @aout: IIO ADC channel to convert the AOUT signal
+ * @als_max: maximum LUX detection (depends on RSET)
+ * @dir: proximity direction: start as FALLING
+ * @led: trigger for the infrared LED used by the proximity sensor
+ */
+struct cm3605 {
+ struct device *dev;
+ struct regulator *vdd;
+ struct gpio_desc *aset;
+ struct iio_channel *aout;
+ s32 als_max;
+ enum iio_event_direction dir;
+ struct led_trigger *led;
+};
+
+static irqreturn_t cm3605_prox_irq(int irq, void *d)
+{
+ struct iio_dev *indio_dev = d;
+ struct cm3605 *cm3605 = iio_priv(indio_dev);
+ u64 ev;
+
+ ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, CM3605_PROX_CHANNEL,
+ IIO_EV_TYPE_THRESH, cm3605->dir);
+ iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
+
+ /* Invert the edge for each event */
+ if (cm3605->dir == IIO_EV_DIR_RISING)
+ cm3605->dir = IIO_EV_DIR_FALLING;
+ else
+ cm3605->dir = IIO_EV_DIR_RISING;
+
+ return IRQ_HANDLED;
+}
+
+static int cm3605_get_lux(struct cm3605 *cm3605)
+{
+ int ret, res;
+ s64 lux;
+
+ ret = iio_read_channel_processed(cm3605->aout, &res);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(cm3605->dev, "read %d mV from ADC\n", res);
+
+ /*
+ * AOUT has an offset of ~30mV then linear at dark
+ * then goes from 2.54 up to 650 LUX yielding 1.55V
+ * (1550 mV) so scale the returned value to this interval
+ * using simple linear interpolation.
+ */
+ if (res < 30)
+ return 0;
+ if (res > CM3605_AOUT_MAX_MV)
+ dev_err(cm3605->dev, "device out of range\n");
+
+ /* Remove bias */
+ lux = res - 30;
+
+ /* Linear interpolation between 0 and ALS typ max */
+ lux *= cm3605->als_max;
+ lux = div64_s64(lux, CM3605_AOUT_TYP_MAX_MV);
+
+ return lux;
+}
+
+static int cm3605_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cm3605 *cm3605 = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = cm3605_get_lux(cm3605);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info cm3605_info = {
+ .read_raw = cm3605_read_raw,
+};
+
+static const struct iio_event_spec cm3605_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec cm3605_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .event_spec = cm3605_events,
+ .num_event_specs = ARRAY_SIZE(cm3605_events),
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .channel = CM3605_ALS_CHANNEL,
+ },
+};
+
+static int cm3605_probe(struct platform_device *pdev)
+{
+ struct cm3605 *cm3605;
+ struct iio_dev *indio_dev;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ enum iio_chan_type ch_type;
+ u32 rset;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*cm3605));
+ if (!indio_dev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, indio_dev);
+
+ cm3605 = iio_priv(indio_dev);
+ cm3605->dev = dev;
+ cm3605->dir = IIO_EV_DIR_FALLING;
+
+ ret = of_property_read_u32(np, "capella,aset-resistance-ohms", &rset);
+ if (ret) {
+ dev_info(dev, "no RSET specified, assuming 100K\n");
+ rset = 100000;
+ }
+ switch (rset) {
+ case 50000:
+ cm3605->als_max = 650;
+ break;
+ case 100000:
+ cm3605->als_max = 300;
+ break;
+ case 300000:
+ cm3605->als_max = 100;
+ break;
+ case 600000:
+ cm3605->als_max = 50;
+ break;
+ default:
+ dev_info(dev, "non-standard resistance\n");
+ return -EINVAL;
+ }
+
+ cm3605->aout = devm_iio_channel_get(dev, "aout");
+ if (IS_ERR(cm3605->aout)) {
+ if (PTR_ERR(cm3605->aout) == -ENODEV) {
+ dev_err(dev, "no ADC, deferring...\n");
+ return -EPROBE_DEFER;
+ }
+ dev_err(dev, "failed to get AOUT ADC channel\n");
+ return PTR_ERR(cm3605->aout);
+ }
+ ret = iio_get_channel_type(cm3605->aout, &ch_type);
+ if (ret < 0)
+ return ret;
+ if (ch_type != IIO_VOLTAGE) {
+ dev_err(dev, "wrong type of IIO channel specified for AOUT\n");
+ return -EINVAL;
+ }
+
+ cm3605->vdd = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(cm3605->vdd)) {
+ dev_err(dev, "failed to get VDD regulator\n");
+ return PTR_ERR(cm3605->vdd);
+ }
+ ret = regulator_enable(cm3605->vdd);
+ if (ret) {
+ dev_err(dev, "failed to enable VDD regulator\n");
+ return ret;
+ }
+
+ cm3605->aset = devm_gpiod_get(dev, "aset", GPIOD_OUT_HIGH);
+ if (IS_ERR(cm3605->aset)) {
+ dev_err(dev, "no ASET GPIO\n");
+ ret = PTR_ERR(cm3605->aset);
+ goto out_disable_vdd;
+ }
+
+ ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
+ cm3605_prox_irq, NULL, 0, "cm3605", indio_dev);
+ if (ret) {
+ dev_err(dev, "unable to request IRQ\n");
+ goto out_disable_aset;
+ }
+
+ /* Just name the trigger the same as the driver */
+ led_trigger_register_simple("cm3605", &cm3605->led);
+ led_trigger_event(cm3605->led, LED_FULL);
+
+ indio_dev->dev.parent = dev;
+ indio_dev->info = &cm3605_info;
+ indio_dev->name = "cm3605";
+ indio_dev->channels = cm3605_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm3605_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto out_remove_trigger;
+ dev_info(dev, "Capella Microsystems CM3605 enabled range 0..%d LUX\n",
+ cm3605->als_max);
+
+ return 0;
+
+out_remove_trigger:
+ led_trigger_event(cm3605->led, LED_OFF);
+ led_trigger_unregister_simple(cm3605->led);
+out_disable_aset:
+ gpiod_set_value_cansleep(cm3605->aset, 0);
+out_disable_vdd:
+ regulator_disable(cm3605->vdd);
+ return ret;
+}
+
+static int cm3605_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct cm3605 *cm3605 = iio_priv(indio_dev);
+
+ led_trigger_event(cm3605->led, LED_OFF);
+ led_trigger_unregister_simple(cm3605->led);
+ gpiod_set_value_cansleep(cm3605->aset, 0);
+ iio_device_unregister(indio_dev);
+ regulator_disable(cm3605->vdd);
+
+ return 0;
+}
+
+static int __maybe_unused cm3605_pm_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct cm3605 *cm3605 = iio_priv(indio_dev);
+
+ led_trigger_event(cm3605->led, LED_OFF);
+ regulator_disable(cm3605->vdd);
+
+ return 0;
+}
+
+static int __maybe_unused cm3605_pm_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct cm3605 *cm3605 = iio_priv(indio_dev);
+ int ret;
+
+ ret = regulator_enable(cm3605->vdd);
+ if (ret)
+ dev_err(dev, "failed to enable regulator in resume path\n");
+ led_trigger_event(cm3605->led, LED_FULL);
+
+ return 0;
+}
+
+static const struct dev_pm_ops cm3605_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(cm3605_pm_suspend,
+ cm3605_pm_resume)
+};
+
+static const struct of_device_id cm3605_of_match[] = {
+ {.compatible = "capella,cm3605"},
+ { },
+};
+MODULE_DEVICE_TABLE(of, cm3605_of_match);
+
+static struct platform_driver cm3605_driver = {
+ .driver = {
+ .name = "cm3605",
+ .of_match_table = cm3605_of_match,
+ .pm = &cm3605_dev_pm_ops,
+ },
+ .probe = cm3605_probe,
+ .remove = cm3605_remove,
+};
+module_platform_driver(cm3605_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("CM3605 ambient light and proximity sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c
new file mode 100644
index 0000000..1dd8ed0
--- /dev/null
+++ b/drivers/iio/light/cm36651.c
@@ -0,0 +1,749 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Beomho Seo <beomho.seo@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+
+/* Slave address 0x19 for PS of 7 bit addressing protocol for I2C */
+#define CM36651_I2C_ADDR_PS 0x19
+/* Alert Response Address */
+#define CM36651_ARA 0x0C
+
+/* Ambient light sensor */
+#define CM36651_CS_CONF1 0x00
+#define CM36651_CS_CONF2 0x01
+#define CM36651_ALS_WH_M 0x02
+#define CM36651_ALS_WH_L 0x03
+#define CM36651_ALS_WL_M 0x04
+#define CM36651_ALS_WL_L 0x05
+#define CM36651_CS_CONF3 0x06
+#define CM36651_CS_CONF_REG_NUM 0x02
+
+/* Proximity sensor */
+#define CM36651_PS_CONF1 0x00
+#define CM36651_PS_THD 0x01
+#define CM36651_PS_CANC 0x02
+#define CM36651_PS_CONF2 0x03
+#define CM36651_PS_REG_NUM 0x04
+
+/* CS_CONF1 command code */
+#define CM36651_ALS_ENABLE 0x00
+#define CM36651_ALS_DISABLE 0x01
+#define CM36651_ALS_INT_EN 0x02
+#define CM36651_ALS_THRES 0x04
+
+/* CS_CONF2 command code */
+#define CM36651_CS_CONF2_DEFAULT_BIT 0x08
+
+/* CS_CONF3 channel integration time */
+#define CM36651_CS_IT1 0x00 /* Integration time 80 msec */
+#define CM36651_CS_IT2 0x40 /* Integration time 160 msec */
+#define CM36651_CS_IT3 0x80 /* Integration time 320 msec */
+#define CM36651_CS_IT4 0xC0 /* Integration time 640 msec */
+
+/* PS_CONF1 command code */
+#define CM36651_PS_ENABLE 0x00
+#define CM36651_PS_DISABLE 0x01
+#define CM36651_PS_INT_EN 0x02
+#define CM36651_PS_PERS2 0x04
+#define CM36651_PS_PERS3 0x08
+#define CM36651_PS_PERS4 0x0C
+
+/* PS_CONF1 command code: integration time */
+#define CM36651_PS_IT1 0x00 /* Integration time 0.32 msec */
+#define CM36651_PS_IT2 0x10 /* Integration time 0.42 msec */
+#define CM36651_PS_IT3 0x20 /* Integration time 0.52 msec */
+#define CM36651_PS_IT4 0x30 /* Integration time 0.64 msec */
+
+/* PS_CONF1 command code: duty ratio */
+#define CM36651_PS_DR1 0x00 /* Duty ratio 1/80 */
+#define CM36651_PS_DR2 0x40 /* Duty ratio 1/160 */
+#define CM36651_PS_DR3 0x80 /* Duty ratio 1/320 */
+#define CM36651_PS_DR4 0xC0 /* Duty ratio 1/640 */
+
+/* PS_THD command code */
+#define CM36651_PS_INITIAL_THD 0x05
+
+/* PS_CANC command code */
+#define CM36651_PS_CANC_DEFAULT 0x00
+
+/* PS_CONF2 command code */
+#define CM36651_PS_HYS1 0x00
+#define CM36651_PS_HYS2 0x01
+#define CM36651_PS_SMART_PERS_EN 0x02
+#define CM36651_PS_DIR_INT 0x04
+#define CM36651_PS_MS 0x10
+
+#define CM36651_CS_COLOR_NUM 4
+
+#define CM36651_CLOSE_PROXIMITY 0x32
+#define CM36651_FAR_PROXIMITY 0x33
+
+#define CM36651_CS_INT_TIME_AVAIL "0.08 0.16 0.32 0.64"
+#define CM36651_PS_INT_TIME_AVAIL "0.000320 0.000420 0.000520 0.000640"
+
+enum cm36651_operation_mode {
+ CM36651_LIGHT_EN,
+ CM36651_PROXIMITY_EN,
+ CM36651_PROXIMITY_EV_EN,
+};
+
+enum cm36651_light_channel_idx {
+ CM36651_LIGHT_CHANNEL_IDX_RED,
+ CM36651_LIGHT_CHANNEL_IDX_GREEN,
+ CM36651_LIGHT_CHANNEL_IDX_BLUE,
+ CM36651_LIGHT_CHANNEL_IDX_CLEAR,
+};
+
+enum cm36651_command {
+ CM36651_CMD_READ_RAW_LIGHT,
+ CM36651_CMD_READ_RAW_PROXIMITY,
+ CM36651_CMD_PROX_EV_EN,
+ CM36651_CMD_PROX_EV_DIS,
+};
+
+static const u8 cm36651_cs_reg[CM36651_CS_CONF_REG_NUM] = {
+ CM36651_CS_CONF1,
+ CM36651_CS_CONF2,
+};
+
+static const u8 cm36651_ps_reg[CM36651_PS_REG_NUM] = {
+ CM36651_PS_CONF1,
+ CM36651_PS_THD,
+ CM36651_PS_CANC,
+ CM36651_PS_CONF2,
+};
+
+struct cm36651_data {
+ const struct cm36651_platform_data *pdata;
+ struct i2c_client *client;
+ struct i2c_client *ps_client;
+ struct i2c_client *ara_client;
+ struct mutex lock;
+ struct regulator *vled_reg;
+ unsigned long flags;
+ int cs_int_time[CM36651_CS_COLOR_NUM];
+ int ps_int_time;
+ u8 cs_ctrl_regs[CM36651_CS_CONF_REG_NUM];
+ u8 ps_ctrl_regs[CM36651_PS_REG_NUM];
+ u16 color[CM36651_CS_COLOR_NUM];
+};
+
+static int cm36651_setup_reg(struct cm36651_data *cm36651)
+{
+ struct i2c_client *client = cm36651->client;
+ struct i2c_client *ps_client = cm36651->ps_client;
+ int i, ret;
+
+ /* CS initialization */
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF1] = CM36651_ALS_ENABLE |
+ CM36651_ALS_THRES;
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF2] = CM36651_CS_CONF2_DEFAULT_BIT;
+
+ for (i = 0; i < CM36651_CS_CONF_REG_NUM; i++) {
+ ret = i2c_smbus_write_byte_data(client, cm36651_cs_reg[i],
+ cm36651->cs_ctrl_regs[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* PS initialization */
+ cm36651->ps_ctrl_regs[CM36651_PS_CONF1] = CM36651_PS_ENABLE |
+ CM36651_PS_IT2;
+ cm36651->ps_ctrl_regs[CM36651_PS_THD] = CM36651_PS_INITIAL_THD;
+ cm36651->ps_ctrl_regs[CM36651_PS_CANC] = CM36651_PS_CANC_DEFAULT;
+ cm36651->ps_ctrl_regs[CM36651_PS_CONF2] = CM36651_PS_HYS2 |
+ CM36651_PS_DIR_INT | CM36651_PS_SMART_PERS_EN;
+
+ for (i = 0; i < CM36651_PS_REG_NUM; i++) {
+ ret = i2c_smbus_write_byte_data(ps_client, cm36651_ps_reg[i],
+ cm36651->ps_ctrl_regs[i]);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Set shutdown mode */
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ CM36651_ALS_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int cm36651_read_output(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int *val)
+{
+ struct i2c_client *client = cm36651->client;
+ int ret = -EINVAL;
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ *val = i2c_smbus_read_word_data(client, chan->address);
+ if (*val < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ CM36651_ALS_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_PROXIMITY:
+ *val = i2c_smbus_read_byte(cm36651->ps_client);
+ if (*val < 0)
+ return ret;
+
+ if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static irqreturn_t cm36651_irq_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ struct i2c_client *client = cm36651->client;
+ int ev_dir, ret;
+ u64 ev_code;
+
+ /*
+ * The PS INT pin is an active low signal that PS INT move logic low
+ * when the object is detect. Once the MCU host received the PS INT
+ * "LOW" signal, the Host needs to read the data at Alert Response
+ * Address(ARA) to clear the PS INT signal. After clearing the PS
+ * INT pin, the PS INT signal toggles from low to high.
+ */
+ ret = i2c_smbus_read_byte(cm36651->ara_client);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "%s: Data read failed: %d\n", __func__, ret);
+ return IRQ_HANDLED;
+ }
+ switch (ret) {
+ case CM36651_CLOSE_PROXIMITY:
+ ev_dir = IIO_EV_DIR_RISING;
+ break;
+ case CM36651_FAR_PROXIMITY:
+ ev_dir = IIO_EV_DIR_FALLING;
+ break;
+ default:
+ dev_err(&client->dev,
+ "%s: Data read wrong: %d\n", __func__, ret);
+ return IRQ_HANDLED;
+ }
+
+ ev_code = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+ CM36651_CMD_READ_RAW_PROXIMITY,
+ IIO_EV_TYPE_THRESH, ev_dir);
+
+ iio_push_event(indio_dev, ev_code, iio_get_time_ns(indio_dev));
+
+ return IRQ_HANDLED;
+}
+
+static int cm36651_set_operation_mode(struct cm36651_data *cm36651, int cmd)
+{
+ struct i2c_client *client = cm36651->client;
+ struct i2c_client *ps_client = cm36651->ps_client;
+ int ret = -EINVAL;
+
+ switch (cmd) {
+ case CM36651_CMD_READ_RAW_LIGHT:
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+ cm36651->cs_ctrl_regs[CM36651_CS_CONF1]);
+ break;
+ case CM36651_CMD_READ_RAW_PROXIMITY:
+ if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags))
+ return CM36651_PROXIMITY_EV_EN;
+
+ ret = i2c_smbus_write_byte_data(ps_client, CM36651_PS_CONF1,
+ cm36651->ps_ctrl_regs[CM36651_PS_CONF1]);
+ break;
+ case CM36651_CMD_PROX_EV_EN:
+ if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+ dev_err(&client->dev,
+ "Already proximity event enable state\n");
+ return ret;
+ }
+ set_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+ ret = i2c_smbus_write_byte_data(ps_client,
+ cm36651_ps_reg[CM36651_PS_CONF1],
+ CM36651_PS_INT_EN | CM36651_PS_PERS2 | CM36651_PS_IT2);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "Proximity enable event failed\n");
+ return ret;
+ }
+ break;
+ case CM36651_CMD_PROX_EV_DIS:
+ if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+ dev_err(&client->dev,
+ "Already proximity event disable state\n");
+ return ret;
+ }
+ clear_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+ ret = i2c_smbus_write_byte_data(ps_client,
+ CM36651_PS_CONF1, CM36651_PS_DISABLE);
+ break;
+ }
+
+ if (ret < 0)
+ dev_err(&client->dev, "Write register failed\n");
+
+ return ret;
+}
+
+static int cm36651_read_channel(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int *val)
+{
+ struct i2c_client *client = cm36651->client;
+ int cmd, ret;
+
+ if (chan->type == IIO_LIGHT)
+ cmd = CM36651_CMD_READ_RAW_LIGHT;
+ else if (chan->type == IIO_PROXIMITY)
+ cmd = CM36651_CMD_READ_RAW_PROXIMITY;
+ else
+ return -EINVAL;
+
+ ret = cm36651_set_operation_mode(cm36651, cmd);
+ if (ret < 0) {
+ dev_err(&client->dev, "CM36651 set operation mode failed\n");
+ return ret;
+ }
+ /* Delay for work after enable operation */
+ msleep(50);
+ ret = cm36651_read_output(cm36651, chan, val);
+ if (ret < 0) {
+ dev_err(&client->dev, "CM36651 read output failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int cm36651_read_int_time(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int *val2)
+{
+ switch (chan->type) {
+ case IIO_LIGHT:
+ if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT1)
+ *val2 = 80000;
+ else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT2)
+ *val2 = 160000;
+ else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT3)
+ *val2 = 320000;
+ else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT4)
+ *val2 = 640000;
+ else
+ return -EINVAL;
+ break;
+ case IIO_PROXIMITY:
+ if (cm36651->ps_int_time == CM36651_PS_IT1)
+ *val2 = 320;
+ else if (cm36651->ps_int_time == CM36651_PS_IT2)
+ *val2 = 420;
+ else if (cm36651->ps_int_time == CM36651_PS_IT3)
+ *val2 = 520;
+ else if (cm36651->ps_int_time == CM36651_PS_IT4)
+ *val2 = 640;
+ else
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int cm36651_write_int_time(struct cm36651_data *cm36651,
+ struct iio_chan_spec const *chan, int val)
+{
+ struct i2c_client *client = cm36651->client;
+ struct i2c_client *ps_client = cm36651->ps_client;
+ int int_time, ret;
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ if (val == 80000)
+ int_time = CM36651_CS_IT1;
+ else if (val == 160000)
+ int_time = CM36651_CS_IT2;
+ else if (val == 320000)
+ int_time = CM36651_CS_IT3;
+ else if (val == 640000)
+ int_time = CM36651_CS_IT4;
+ else
+ return -EINVAL;
+
+ ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF3,
+ int_time >> 2 * (chan->address));
+ if (ret < 0) {
+ dev_err(&client->dev, "CS integration time write failed\n");
+ return ret;
+ }
+ cm36651->cs_int_time[chan->address] = int_time;
+ break;
+ case IIO_PROXIMITY:
+ if (val == 320)
+ int_time = CM36651_PS_IT1;
+ else if (val == 420)
+ int_time = CM36651_PS_IT2;
+ else if (val == 520)
+ int_time = CM36651_PS_IT3;
+ else if (val == 640)
+ int_time = CM36651_PS_IT4;
+ else
+ return -EINVAL;
+
+ ret = i2c_smbus_write_byte_data(ps_client,
+ CM36651_PS_CONF1, int_time);
+ if (ret < 0) {
+ dev_err(&client->dev, "PS integration time write failed\n");
+ return ret;
+ }
+ cm36651->ps_int_time = int_time;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int cm36651_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&cm36651->lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = cm36651_read_channel(cm36651, chan, val);
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ ret = cm36651_read_int_time(cm36651, chan, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&cm36651->lock);
+
+ return ret;
+}
+
+static int cm36651_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ struct i2c_client *client = cm36651->client;
+ int ret = -EINVAL;
+
+ if (mask == IIO_CHAN_INFO_INT_TIME) {
+ ret = cm36651_write_int_time(cm36651, chan, val2);
+ if (ret < 0)
+ dev_err(&client->dev, "Integration time write failed\n");
+ }
+
+ return ret;
+}
+
+static int cm36651_read_prox_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+
+ *val = cm36651->ps_ctrl_regs[CM36651_PS_THD];
+
+ return 0;
+}
+
+static int cm36651_write_prox_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ struct i2c_client *client = cm36651->client;
+ int ret;
+
+ if (val < 3 || val > 255)
+ return -EINVAL;
+
+ cm36651->ps_ctrl_regs[CM36651_PS_THD] = val;
+ ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_THD,
+ cm36651->ps_ctrl_regs[CM36651_PS_THD]);
+
+ if (ret < 0) {
+ dev_err(&client->dev, "PS threshold write failed: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cm36651_write_prox_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int cmd, ret = -EINVAL;
+
+ mutex_lock(&cm36651->lock);
+
+ cmd = state ? CM36651_CMD_PROX_EV_EN : CM36651_CMD_PROX_EV_DIS;
+ ret = cm36651_set_operation_mode(cm36651, cmd);
+
+ mutex_unlock(&cm36651->lock);
+
+ return ret;
+}
+
+static int cm36651_read_prox_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+ int event_en;
+
+ mutex_lock(&cm36651->lock);
+
+ event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+ mutex_unlock(&cm36651->lock);
+
+ return event_en;
+}
+
+#define CM36651_LIGHT_CHANNEL(_color, _idx) { \
+ .type = IIO_LIGHT, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+ .address = _idx, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+} \
+
+static const struct iio_event_spec cm36651_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }
+};
+
+static const struct iio_chan_spec cm36651_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .event_spec = cm36651_event_spec,
+ .num_event_specs = ARRAY_SIZE(cm36651_event_spec),
+ },
+ CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED),
+ CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN),
+ CM36651_LIGHT_CHANNEL(BLUE, CM36651_LIGHT_CHANNEL_IDX_BLUE),
+ CM36651_LIGHT_CHANNEL(CLEAR, CM36651_LIGHT_CHANNEL_IDX_CLEAR),
+};
+
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+ CM36651_CS_INT_TIME_AVAIL);
+static IIO_CONST_ATTR(in_proximity_integration_time_available,
+ CM36651_PS_INT_TIME_AVAIL);
+
+static struct attribute *cm36651_attributes[] = {
+ &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group cm36651_attribute_group = {
+ .attrs = cm36651_attributes
+};
+
+static const struct iio_info cm36651_info = {
+ .read_raw = &cm36651_read_raw,
+ .write_raw = &cm36651_write_raw,
+ .read_event_value = &cm36651_read_prox_thresh,
+ .write_event_value = &cm36651_write_prox_thresh,
+ .read_event_config = &cm36651_read_prox_event_config,
+ .write_event_config = &cm36651_write_prox_event_config,
+ .attrs = &cm36651_attribute_group,
+};
+
+static int cm36651_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cm36651_data *cm36651;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm36651));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ cm36651 = iio_priv(indio_dev);
+
+ cm36651->vled_reg = devm_regulator_get(&client->dev, "vled");
+ if (IS_ERR(cm36651->vled_reg)) {
+ dev_err(&client->dev, "get regulator vled failed\n");
+ return PTR_ERR(cm36651->vled_reg);
+ }
+
+ ret = regulator_enable(cm36651->vled_reg);
+ if (ret) {
+ dev_err(&client->dev, "enable regulator vled failed\n");
+ return ret;
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+
+ cm36651->client = client;
+ cm36651->ps_client = i2c_new_dummy(client->adapter,
+ CM36651_I2C_ADDR_PS);
+ if (!cm36651->ps_client) {
+ dev_err(&client->dev, "%s: new i2c device failed\n", __func__);
+ ret = -ENODEV;
+ goto error_disable_reg;
+ }
+
+ cm36651->ara_client = i2c_new_dummy(client->adapter, CM36651_ARA);
+ if (!cm36651->ara_client) {
+ dev_err(&client->dev, "%s: new i2c device failed\n", __func__);
+ ret = -ENODEV;
+ goto error_i2c_unregister_ps;
+ }
+
+ mutex_init(&cm36651->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = cm36651_channels;
+ indio_dev->num_channels = ARRAY_SIZE(cm36651_channels);
+ indio_dev->info = &cm36651_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = cm36651_setup_reg(cm36651);
+ if (ret) {
+ dev_err(&client->dev, "%s: register setup failed\n", __func__);
+ goto error_i2c_unregister_ara;
+ }
+
+ ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "cm36651", indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "%s: request irq failed\n", __func__);
+ goto error_i2c_unregister_ara;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "%s: regist device failed\n", __func__);
+ goto error_free_irq;
+ }
+
+ return 0;
+
+error_free_irq:
+ free_irq(client->irq, indio_dev);
+error_i2c_unregister_ara:
+ i2c_unregister_device(cm36651->ara_client);
+error_i2c_unregister_ps:
+ i2c_unregister_device(cm36651->ps_client);
+error_disable_reg:
+ regulator_disable(cm36651->vled_reg);
+ return ret;
+}
+
+static int cm36651_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct cm36651_data *cm36651 = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ regulator_disable(cm36651->vled_reg);
+ free_irq(client->irq, indio_dev);
+ i2c_unregister_device(cm36651->ps_client);
+ i2c_unregister_device(cm36651->ara_client);
+
+ return 0;
+}
+
+static const struct i2c_device_id cm36651_id[] = {
+ { "cm36651", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, cm36651_id);
+
+static const struct of_device_id cm36651_of_match[] = {
+ { .compatible = "capella,cm36651" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, cm36651_of_match);
+
+static struct i2c_driver cm36651_driver = {
+ .driver = {
+ .name = "cm36651",
+ .of_match_table = cm36651_of_match,
+ },
+ .probe = cm36651_probe,
+ .remove = cm36651_remove,
+ .id_table = cm36651_id,
+};
+
+module_i2c_driver(cm36651_driver);
+
+MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
+MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
new file mode 100644
index 0000000..fd1609e
--- /dev/null
+++ b/drivers/iio/light/cros_ec_light_prox.c
@@ -0,0 +1,286 @@
+/*
+ * cros_ec_light_prox - Driver for light and prox sensors behing CrosEC.
+ *
+ * Copyright (C) 2017 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/common/cros_ec_sensors_core.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/kfifo_buf.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/kernel.h>
+#include <linux/mfd/cros_ec.h>
+#include <linux/mfd/cros_ec_commands.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+/*
+ * We only represent one entry for light or proximity. EC is merging different
+ * light sensors to return the what the eye would see. For proximity, we
+ * currently support only one light source.
+ */
+#define CROS_EC_LIGHT_PROX_MAX_CHANNELS (1 + 1)
+
+/* State data for ec_sensors iio driver. */
+struct cros_ec_light_prox_state {
+ /* Shared by all sensors */
+ struct cros_ec_sensors_core_state core;
+
+ struct iio_chan_spec channels[CROS_EC_LIGHT_PROX_MAX_CHANNELS];
+};
+
+static int cros_ec_light_prox_read(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
+ u16 data = 0;
+ s64 val64;
+ int ret = IIO_VAL_INT;
+ int idx = chan->scan_index;
+
+ mutex_lock(&st->core.cmd_lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_PROXIMITY) {
+ if (cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
+ (s16 *)&data) < 0) {
+ ret = -EIO;
+ break;
+ }
+ *val = data;
+ } else {
+ ret = -EINVAL;
+ }
+ break;
+ case IIO_CHAN_INFO_PROCESSED:
+ if (chan->type == IIO_LIGHT) {
+ if (cros_ec_sensors_read_cmd(indio_dev, 1 << idx,
+ (s16 *)&data) < 0) {
+ ret = -EIO;
+ break;
+ }
+ /*
+ * The data coming from the light sensor is
+ * pre-processed and represents the ambient light
+ * illuminance reading expressed in lux.
+ */
+ *val = data;
+ ret = IIO_VAL_INT;
+ } else {
+ ret = -EINVAL;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+ st->core.param.sensor_offset.flags = 0;
+
+ if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
+ ret = -EIO;
+ break;
+ }
+
+ /* Save values */
+ st->core.calib[0] = st->core.resp->sensor_offset.offset[0];
+
+ *val = st->core.calib[idx];
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ /*
+ * RANGE is used for calibration
+ * scale is a number x.y, where x is coded on 16 bits,
+ * y coded on 16 bits, between 0 and 9999.
+ */
+ st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+ st->core.param.sensor_range.data = EC_MOTION_SENSE_NO_VALUE;
+
+ if (cros_ec_motion_send_host_cmd(&st->core, 0)) {
+ ret = -EIO;
+ break;
+ }
+
+ val64 = st->core.resp->sensor_range.ret;
+ *val = val64 >> 16;
+ *val2 = (val64 & 0xffff) * 100;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret = cros_ec_sensors_core_read(&st->core, chan, val, val2,
+ mask);
+ break;
+ }
+
+ mutex_unlock(&st->core.cmd_lock);
+
+ return ret;
+}
+
+static int cros_ec_light_prox_write(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct cros_ec_light_prox_state *st = iio_priv(indio_dev);
+ int ret = 0;
+ int idx = chan->scan_index;
+
+ mutex_lock(&st->core.cmd_lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ st->core.calib[idx] = val;
+ /* Send to EC for each axis, even if not complete */
+ st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_OFFSET;
+ st->core.param.sensor_offset.flags = MOTION_SENSE_SET_OFFSET;
+ st->core.param.sensor_offset.offset[0] = st->core.calib[0];
+ st->core.param.sensor_offset.temp =
+ EC_MOTION_SENSE_INVALID_CALIB_TEMP;
+ if (cros_ec_motion_send_host_cmd(&st->core, 0))
+ ret = -EIO;
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ st->core.param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
+ st->core.param.sensor_range.data = (val << 16) | (val2 / 100);
+ if (cros_ec_motion_send_host_cmd(&st->core, 0))
+ ret = -EIO;
+ break;
+ default:
+ ret = cros_ec_sensors_core_write(&st->core, chan, val, val2,
+ mask);
+ break;
+ }
+
+ mutex_unlock(&st->core.cmd_lock);
+
+ return ret;
+}
+
+static const struct iio_info cros_ec_light_prox_info = {
+ .read_raw = &cros_ec_light_prox_read,
+ .write_raw = &cros_ec_light_prox_write,
+};
+
+static int cros_ec_light_prox_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
+ struct iio_dev *indio_dev;
+ struct cros_ec_light_prox_state *state;
+ struct iio_chan_spec *channel;
+ int ret;
+
+ if (!ec_dev || !ec_dev->ec_dev) {
+ dev_warn(dev, "No CROS EC device found.\n");
+ return -EINVAL;
+ }
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ ret = cros_ec_sensors_core_init(pdev, indio_dev, true);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &cros_ec_light_prox_info;
+ state = iio_priv(indio_dev);
+ state->core.type = state->core.resp->info.type;
+ state->core.loc = state->core.resp->info.location;
+ channel = state->channels;
+
+ /* Common part */
+ channel->info_mask_shared_by_all =
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_FREQUENCY);
+ channel->scan_type.realbits = CROS_EC_SENSOR_BITS;
+ channel->scan_type.storagebits = CROS_EC_SENSOR_BITS;
+ channel->scan_type.shift = 0;
+ channel->scan_index = 0;
+ channel->ext_info = cros_ec_sensors_ext_info;
+ channel->scan_type.sign = 'u';
+
+ state->core.calib[0] = 0;
+
+ /* Sensor specific */
+ switch (state->core.type) {
+ case MOTIONSENSE_TYPE_LIGHT:
+ channel->type = IIO_LIGHT;
+ channel->info_mask_separate =
+ BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE);
+ break;
+ case MOTIONSENSE_TYPE_PROX:
+ channel->type = IIO_PROXIMITY;
+ channel->info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE);
+ break;
+ default:
+ dev_warn(dev, "Unknown motion sensor\n");
+ return -EINVAL;
+ }
+
+ /* Timestamp */
+ channel++;
+ channel->type = IIO_TIMESTAMP;
+ channel->channel = -1;
+ channel->scan_index = 1;
+ channel->scan_type.sign = 's';
+ channel->scan_type.realbits = 64;
+ channel->scan_type.storagebits = 64;
+
+ indio_dev->channels = state->channels;
+
+ indio_dev->num_channels = CROS_EC_LIGHT_PROX_MAX_CHANNELS;
+
+ state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
+
+ ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
+ cros_ec_sensors_capture, NULL);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, indio_dev);
+}
+
+static const struct platform_device_id cros_ec_light_prox_ids[] = {
+ {
+ .name = "cros-ec-prox",
+ },
+ {
+ .name = "cros-ec-light",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, cros_ec_light_prox_ids);
+
+static struct platform_driver cros_ec_light_prox_platform_driver = {
+ .driver = {
+ .name = "cros-ec-light-prox",
+ .pm = &cros_ec_sensors_pm_ops,
+ },
+ .probe = cros_ec_light_prox_probe,
+ .id_table = cros_ec_light_prox_ids,
+};
+module_platform_driver(cros_ec_light_prox_platform_driver);
+
+MODULE_DESCRIPTION("ChromeOS EC light/proximity sensors driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c
new file mode 100644
index 0000000..44b13fb
--- /dev/null
+++ b/drivers/iio/light/gp2ap020a00f.c
@@ -0,0 +1,1644 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Jacek Anaszewski <j.anaszewski@samsung.com>
+ *
+ * IIO features supported by the driver:
+ *
+ * Read-only raw channels:
+ * - illuminance_clear [lux]
+ * - illuminance_ir
+ * - proximity
+ *
+ * Triggered buffer:
+ * - illuminance_clear
+ * - illuminance_ir
+ * - proximity
+ *
+ * Events:
+ * - illuminance_clear (rising and falling)
+ * - proximity (rising and falling)
+ * - both falling and rising thresholds for the proximity events
+ * must be set to the values greater than 0.
+ *
+ * The driver supports triggered buffers for all the three
+ * channels as well as high and low threshold events for the
+ * illuminance_clear and proxmimity channels. Triggers
+ * can be enabled simultaneously with both illuminance_clear
+ * events. Proximity events cannot be enabled simultaneously
+ * with any triggers or illuminance events. Enabling/disabling
+ * one of the proximity events automatically enables/disables
+ * the other one.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irq_work.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <asm/unaligned.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define GP2A_I2C_NAME "gp2ap020a00f"
+
+/* Registers */
+#define GP2AP020A00F_OP_REG 0x00 /* Basic operations */
+#define GP2AP020A00F_ALS_REG 0x01 /* ALS related settings */
+#define GP2AP020A00F_PS_REG 0x02 /* PS related settings */
+#define GP2AP020A00F_LED_REG 0x03 /* LED reg */
+#define GP2AP020A00F_TL_L_REG 0x04 /* ALS: Threshold low LSB */
+#define GP2AP020A00F_TL_H_REG 0x05 /* ALS: Threshold low MSB */
+#define GP2AP020A00F_TH_L_REG 0x06 /* ALS: Threshold high LSB */
+#define GP2AP020A00F_TH_H_REG 0x07 /* ALS: Threshold high MSB */
+#define GP2AP020A00F_PL_L_REG 0x08 /* PS: Threshold low LSB */
+#define GP2AP020A00F_PL_H_REG 0x09 /* PS: Threshold low MSB */
+#define GP2AP020A00F_PH_L_REG 0x0a /* PS: Threshold high LSB */
+#define GP2AP020A00F_PH_H_REG 0x0b /* PS: Threshold high MSB */
+#define GP2AP020A00F_D0_L_REG 0x0c /* ALS result: Clear/Illuminance LSB */
+#define GP2AP020A00F_D0_H_REG 0x0d /* ALS result: Clear/Illuminance MSB */
+#define GP2AP020A00F_D1_L_REG 0x0e /* ALS result: IR LSB */
+#define GP2AP020A00F_D1_H_REG 0x0f /* ALS result: IR LSB */
+#define GP2AP020A00F_D2_L_REG 0x10 /* PS result LSB */
+#define GP2AP020A00F_D2_H_REG 0x11 /* PS result MSB */
+#define GP2AP020A00F_NUM_REGS 0x12 /* Number of registers */
+
+/* OP_REG bits */
+#define GP2AP020A00F_OP3_MASK 0x80 /* Software shutdown */
+#define GP2AP020A00F_OP3_SHUTDOWN 0x00
+#define GP2AP020A00F_OP3_OPERATION 0x80
+#define GP2AP020A00F_OP2_MASK 0x40 /* Auto shutdown/Continuous mode */
+#define GP2AP020A00F_OP2_AUTO_SHUTDOWN 0x00
+#define GP2AP020A00F_OP2_CONT_OPERATION 0x40
+#define GP2AP020A00F_OP_MASK 0x30 /* Operating mode selection */
+#define GP2AP020A00F_OP_ALS_AND_PS 0x00
+#define GP2AP020A00F_OP_ALS 0x10
+#define GP2AP020A00F_OP_PS 0x20
+#define GP2AP020A00F_OP_DEBUG 0x30
+#define GP2AP020A00F_PROX_MASK 0x08 /* PS: detection/non-detection */
+#define GP2AP020A00F_PROX_NON_DETECT 0x00
+#define GP2AP020A00F_PROX_DETECT 0x08
+#define GP2AP020A00F_FLAG_P 0x04 /* PS: interrupt result */
+#define GP2AP020A00F_FLAG_A 0x02 /* ALS: interrupt result */
+#define GP2AP020A00F_TYPE_MASK 0x01 /* Output data type selection */
+#define GP2AP020A00F_TYPE_MANUAL_CALC 0x00
+#define GP2AP020A00F_TYPE_AUTO_CALC 0x01
+
+/* ALS_REG bits */
+#define GP2AP020A00F_PRST_MASK 0xc0 /* Number of measurement cycles */
+#define GP2AP020A00F_PRST_ONCE 0x00
+#define GP2AP020A00F_PRST_4_CYCLES 0x40
+#define GP2AP020A00F_PRST_8_CYCLES 0x80
+#define GP2AP020A00F_PRST_16_CYCLES 0xc0
+#define GP2AP020A00F_RES_A_MASK 0x38 /* ALS: Resolution */
+#define GP2AP020A00F_RES_A_800ms 0x00
+#define GP2AP020A00F_RES_A_400ms 0x08
+#define GP2AP020A00F_RES_A_200ms 0x10
+#define GP2AP020A00F_RES_A_100ms 0x18
+#define GP2AP020A00F_RES_A_25ms 0x20
+#define GP2AP020A00F_RES_A_6_25ms 0x28
+#define GP2AP020A00F_RES_A_1_56ms 0x30
+#define GP2AP020A00F_RES_A_0_39ms 0x38
+#define GP2AP020A00F_RANGE_A_MASK 0x07 /* ALS: Max measurable range */
+#define GP2AP020A00F_RANGE_A_x1 0x00
+#define GP2AP020A00F_RANGE_A_x2 0x01
+#define GP2AP020A00F_RANGE_A_x4 0x02
+#define GP2AP020A00F_RANGE_A_x8 0x03
+#define GP2AP020A00F_RANGE_A_x16 0x04
+#define GP2AP020A00F_RANGE_A_x32 0x05
+#define GP2AP020A00F_RANGE_A_x64 0x06
+#define GP2AP020A00F_RANGE_A_x128 0x07
+
+/* PS_REG bits */
+#define GP2AP020A00F_ALC_MASK 0x80 /* Auto light cancel */
+#define GP2AP020A00F_ALC_ON 0x80
+#define GP2AP020A00F_ALC_OFF 0x00
+#define GP2AP020A00F_INTTYPE_MASK 0x40 /* Interrupt type setting */
+#define GP2AP020A00F_INTTYPE_LEVEL 0x00
+#define GP2AP020A00F_INTTYPE_PULSE 0x40
+#define GP2AP020A00F_RES_P_MASK 0x38 /* PS: Resolution */
+#define GP2AP020A00F_RES_P_800ms_x2 0x00
+#define GP2AP020A00F_RES_P_400ms_x2 0x08
+#define GP2AP020A00F_RES_P_200ms_x2 0x10
+#define GP2AP020A00F_RES_P_100ms_x2 0x18
+#define GP2AP020A00F_RES_P_25ms_x2 0x20
+#define GP2AP020A00F_RES_P_6_25ms_x2 0x28
+#define GP2AP020A00F_RES_P_1_56ms_x2 0x30
+#define GP2AP020A00F_RES_P_0_39ms_x2 0x38
+#define GP2AP020A00F_RANGE_P_MASK 0x07 /* PS: Max measurable range */
+#define GP2AP020A00F_RANGE_P_x1 0x00
+#define GP2AP020A00F_RANGE_P_x2 0x01
+#define GP2AP020A00F_RANGE_P_x4 0x02
+#define GP2AP020A00F_RANGE_P_x8 0x03
+#define GP2AP020A00F_RANGE_P_x16 0x04
+#define GP2AP020A00F_RANGE_P_x32 0x05
+#define GP2AP020A00F_RANGE_P_x64 0x06
+#define GP2AP020A00F_RANGE_P_x128 0x07
+
+/* LED reg bits */
+#define GP2AP020A00F_INTVAL_MASK 0xc0 /* Intermittent operating */
+#define GP2AP020A00F_INTVAL_0 0x00
+#define GP2AP020A00F_INTVAL_4 0x40
+#define GP2AP020A00F_INTVAL_8 0x80
+#define GP2AP020A00F_INTVAL_16 0xc0
+#define GP2AP020A00F_IS_MASK 0x30 /* ILED drive peak current */
+#define GP2AP020A00F_IS_13_8mA 0x00
+#define GP2AP020A00F_IS_27_5mA 0x10
+#define GP2AP020A00F_IS_55mA 0x20
+#define GP2AP020A00F_IS_110mA 0x30
+#define GP2AP020A00F_PIN_MASK 0x0c /* INT terminal setting */
+#define GP2AP020A00F_PIN_ALS_OR_PS 0x00
+#define GP2AP020A00F_PIN_ALS 0x04
+#define GP2AP020A00F_PIN_PS 0x08
+#define GP2AP020A00F_PIN_PS_DETECT 0x0c
+#define GP2AP020A00F_FREQ_MASK 0x02 /* LED modulation frequency */
+#define GP2AP020A00F_FREQ_327_5kHz 0x00
+#define GP2AP020A00F_FREQ_81_8kHz 0x02
+#define GP2AP020A00F_RST 0x01 /* Software reset */
+
+#define GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR 0
+#define GP2AP020A00F_SCAN_MODE_LIGHT_IR 1
+#define GP2AP020A00F_SCAN_MODE_PROXIMITY 2
+#define GP2AP020A00F_CHAN_TIMESTAMP 3
+
+#define GP2AP020A00F_DATA_READY_TIMEOUT msecs_to_jiffies(1000)
+#define GP2AP020A00F_DATA_REG(chan) (GP2AP020A00F_D0_L_REG + \
+ (chan) * 2)
+#define GP2AP020A00F_THRESH_REG(th_val_id) (GP2AP020A00F_TL_L_REG + \
+ (th_val_id) * 2)
+#define GP2AP020A00F_THRESH_VAL_ID(reg_addr) ((reg_addr - 4) / 2)
+
+#define GP2AP020A00F_SUBTRACT_MODE 0
+#define GP2AP020A00F_ADD_MODE 1
+
+#define GP2AP020A00F_MAX_CHANNELS 3
+
+enum gp2ap020a00f_opmode {
+ GP2AP020A00F_OPMODE_READ_RAW_CLEAR,
+ GP2AP020A00F_OPMODE_READ_RAW_IR,
+ GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_OPMODE_ALS_AND_PS,
+ GP2AP020A00F_OPMODE_PROX_DETECT,
+ GP2AP020A00F_OPMODE_SHUTDOWN,
+ GP2AP020A00F_NUM_OPMODES,
+};
+
+enum gp2ap020a00f_cmd {
+ GP2AP020A00F_CMD_READ_RAW_CLEAR,
+ GP2AP020A00F_CMD_READ_RAW_IR,
+ GP2AP020A00F_CMD_READ_RAW_PROXIMITY,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_EN,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS,
+ GP2AP020A00F_CMD_TRIGGER_IR_EN,
+ GP2AP020A00F_CMD_TRIGGER_IR_DIS,
+ GP2AP020A00F_CMD_TRIGGER_PROX_EN,
+ GP2AP020A00F_CMD_TRIGGER_PROX_DIS,
+ GP2AP020A00F_CMD_ALS_HIGH_EV_EN,
+ GP2AP020A00F_CMD_ALS_HIGH_EV_DIS,
+ GP2AP020A00F_CMD_ALS_LOW_EV_EN,
+ GP2AP020A00F_CMD_ALS_LOW_EV_DIS,
+ GP2AP020A00F_CMD_PROX_HIGH_EV_EN,
+ GP2AP020A00F_CMD_PROX_HIGH_EV_DIS,
+ GP2AP020A00F_CMD_PROX_LOW_EV_EN,
+ GP2AP020A00F_CMD_PROX_LOW_EV_DIS,
+};
+
+enum gp2ap020a00f_flags {
+ GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER,
+ GP2AP020A00F_FLAG_ALS_IR_TRIGGER,
+ GP2AP020A00F_FLAG_PROX_TRIGGER,
+ GP2AP020A00F_FLAG_PROX_RISING_EV,
+ GP2AP020A00F_FLAG_PROX_FALLING_EV,
+ GP2AP020A00F_FLAG_ALS_RISING_EV,
+ GP2AP020A00F_FLAG_ALS_FALLING_EV,
+ GP2AP020A00F_FLAG_LUX_MODE_HI,
+ GP2AP020A00F_FLAG_DATA_READY,
+};
+
+enum gp2ap020a00f_thresh_val_id {
+ GP2AP020A00F_THRESH_TL,
+ GP2AP020A00F_THRESH_TH,
+ GP2AP020A00F_THRESH_PL,
+ GP2AP020A00F_THRESH_PH,
+};
+
+struct gp2ap020a00f_data {
+ const struct gp2ap020a00f_platform_data *pdata;
+ struct i2c_client *client;
+ struct mutex lock;
+ char *buffer;
+ struct regulator *vled_reg;
+ unsigned long flags;
+ enum gp2ap020a00f_opmode cur_opmode;
+ struct iio_trigger *trig;
+ struct regmap *regmap;
+ unsigned int thresh_val[4];
+ u8 debug_reg_addr;
+ struct irq_work work;
+ wait_queue_head_t data_ready_queue;
+};
+
+static const u8 gp2ap020a00f_reg_init_tab[] = {
+ [GP2AP020A00F_OP_REG] = GP2AP020A00F_OP3_SHUTDOWN,
+ [GP2AP020A00F_ALS_REG] = GP2AP020A00F_RES_A_25ms |
+ GP2AP020A00F_RANGE_A_x8,
+ [GP2AP020A00F_PS_REG] = GP2AP020A00F_ALC_ON |
+ GP2AP020A00F_RES_P_1_56ms_x2 |
+ GP2AP020A00F_RANGE_P_x4,
+ [GP2AP020A00F_LED_REG] = GP2AP020A00F_INTVAL_0 |
+ GP2AP020A00F_IS_110mA |
+ GP2AP020A00F_FREQ_327_5kHz,
+ [GP2AP020A00F_TL_L_REG] = 0,
+ [GP2AP020A00F_TL_H_REG] = 0,
+ [GP2AP020A00F_TH_L_REG] = 0,
+ [GP2AP020A00F_TH_H_REG] = 0,
+ [GP2AP020A00F_PL_L_REG] = 0,
+ [GP2AP020A00F_PL_H_REG] = 0,
+ [GP2AP020A00F_PH_L_REG] = 0,
+ [GP2AP020A00F_PH_H_REG] = 0,
+};
+
+static bool gp2ap020a00f_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case GP2AP020A00F_OP_REG:
+ case GP2AP020A00F_D0_L_REG:
+ case GP2AP020A00F_D0_H_REG:
+ case GP2AP020A00F_D1_L_REG:
+ case GP2AP020A00F_D1_H_REG:
+ case GP2AP020A00F_D2_L_REG:
+ case GP2AP020A00F_D2_H_REG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config gp2ap020a00f_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = GP2AP020A00F_D2_H_REG,
+ .cache_type = REGCACHE_RBTREE,
+
+ .volatile_reg = gp2ap020a00f_is_volatile_reg,
+};
+
+static const struct gp2ap020a00f_mutable_config_regs {
+ u8 op_reg;
+ u8 als_reg;
+ u8 ps_reg;
+ u8 led_reg;
+} opmode_regs_settings[GP2AP020A00F_NUM_OPMODES] = {
+ [GP2AP020A00F_OPMODE_READ_RAW_CLEAR] = {
+ GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_AUTO_CALC,
+ GP2AP020A00F_PRST_ONCE,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_ALS
+ },
+ [GP2AP020A00F_OPMODE_READ_RAW_IR] = {
+ GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_MANUAL_CALC,
+ GP2AP020A00F_PRST_ONCE,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_ALS
+ },
+ [GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY] = {
+ GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_MANUAL_CALC,
+ GP2AP020A00F_PRST_ONCE,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_PS
+ },
+ [GP2AP020A00F_OPMODE_PROX_DETECT] = {
+ GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_MANUAL_CALC,
+ GP2AP020A00F_PRST_4_CYCLES,
+ GP2AP020A00F_INTTYPE_PULSE,
+ GP2AP020A00F_PIN_PS_DETECT
+ },
+ [GP2AP020A00F_OPMODE_ALS] = {
+ GP2AP020A00F_OP_ALS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_AUTO_CALC,
+ GP2AP020A00F_PRST_ONCE,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_ALS
+ },
+ [GP2AP020A00F_OPMODE_PS] = {
+ GP2AP020A00F_OP_PS | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_MANUAL_CALC,
+ GP2AP020A00F_PRST_4_CYCLES,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_PS
+ },
+ [GP2AP020A00F_OPMODE_ALS_AND_PS] = {
+ GP2AP020A00F_OP_ALS_AND_PS
+ | GP2AP020A00F_OP2_CONT_OPERATION
+ | GP2AP020A00F_OP3_OPERATION
+ | GP2AP020A00F_TYPE_AUTO_CALC,
+ GP2AP020A00F_PRST_4_CYCLES,
+ GP2AP020A00F_INTTYPE_LEVEL,
+ GP2AP020A00F_PIN_ALS_OR_PS
+ },
+ [GP2AP020A00F_OPMODE_SHUTDOWN] = { GP2AP020A00F_OP3_SHUTDOWN, },
+};
+
+static int gp2ap020a00f_set_operation_mode(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_opmode op)
+{
+ unsigned int op_reg_val;
+ int err;
+
+ if (op != GP2AP020A00F_OPMODE_SHUTDOWN) {
+ err = regmap_read(data->regmap, GP2AP020A00F_OP_REG,
+ &op_reg_val);
+ if (err < 0)
+ return err;
+ /*
+ * Shutdown the device if the operation being executed entails
+ * mode transition.
+ */
+ if ((opmode_regs_settings[op].op_reg & GP2AP020A00F_OP_MASK) !=
+ (op_reg_val & GP2AP020A00F_OP_MASK)) {
+ /* set shutdown mode */
+ err = regmap_update_bits(data->regmap,
+ GP2AP020A00F_OP_REG, GP2AP020A00F_OP3_MASK,
+ GP2AP020A00F_OP3_SHUTDOWN);
+ if (err < 0)
+ return err;
+ }
+
+ err = regmap_update_bits(data->regmap, GP2AP020A00F_ALS_REG,
+ GP2AP020A00F_PRST_MASK, opmode_regs_settings[op]
+ .als_reg);
+ if (err < 0)
+ return err;
+
+ err = regmap_update_bits(data->regmap, GP2AP020A00F_PS_REG,
+ GP2AP020A00F_INTTYPE_MASK, opmode_regs_settings[op]
+ .ps_reg);
+ if (err < 0)
+ return err;
+
+ err = regmap_update_bits(data->regmap, GP2AP020A00F_LED_REG,
+ GP2AP020A00F_PIN_MASK, opmode_regs_settings[op]
+ .led_reg);
+ if (err < 0)
+ return err;
+ }
+
+ /* Set OP_REG and apply operation mode (power on / off) */
+ err = regmap_update_bits(data->regmap,
+ GP2AP020A00F_OP_REG,
+ GP2AP020A00F_OP_MASK | GP2AP020A00F_OP2_MASK |
+ GP2AP020A00F_OP3_MASK | GP2AP020A00F_TYPE_MASK,
+ opmode_regs_settings[op].op_reg);
+ if (err < 0)
+ return err;
+
+ data->cur_opmode = op;
+
+ return 0;
+}
+
+static bool gp2ap020a00f_als_enabled(struct gp2ap020a00f_data *data)
+{
+ return test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
+}
+
+static bool gp2ap020a00f_prox_detect_enabled(struct gp2ap020a00f_data *data)
+{
+ return test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags) ||
+ test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
+}
+
+static int gp2ap020a00f_write_event_threshold(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_thresh_val_id th_val_id,
+ bool enable)
+{
+ __le16 thresh_buf = 0;
+ unsigned int thresh_reg_val;
+
+ if (!enable)
+ thresh_reg_val = 0;
+ else if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags) &&
+ th_val_id != GP2AP020A00F_THRESH_PL &&
+ th_val_id != GP2AP020A00F_THRESH_PH)
+ /*
+ * For the high lux mode ALS threshold has to be scaled down
+ * to allow for proper comparison with the output value.
+ */
+ thresh_reg_val = data->thresh_val[th_val_id] / 16;
+ else
+ thresh_reg_val = data->thresh_val[th_val_id] > 16000 ?
+ 16000 :
+ data->thresh_val[th_val_id];
+
+ thresh_buf = cpu_to_le16(thresh_reg_val);
+
+ return regmap_bulk_write(data->regmap,
+ GP2AP020A00F_THRESH_REG(th_val_id),
+ (u8 *)&thresh_buf, 2);
+}
+
+static int gp2ap020a00f_alter_opmode(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_opmode diff_mode, int add_sub)
+{
+ enum gp2ap020a00f_opmode new_mode;
+
+ if (diff_mode != GP2AP020A00F_OPMODE_ALS &&
+ diff_mode != GP2AP020A00F_OPMODE_PS)
+ return -EINVAL;
+
+ if (add_sub == GP2AP020A00F_ADD_MODE) {
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_SHUTDOWN)
+ new_mode = diff_mode;
+ else
+ new_mode = GP2AP020A00F_OPMODE_ALS_AND_PS;
+ } else {
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_ALS_AND_PS)
+ new_mode = (diff_mode == GP2AP020A00F_OPMODE_ALS) ?
+ GP2AP020A00F_OPMODE_PS :
+ GP2AP020A00F_OPMODE_ALS;
+ else
+ new_mode = GP2AP020A00F_OPMODE_SHUTDOWN;
+ }
+
+ return gp2ap020a00f_set_operation_mode(data, new_mode);
+}
+
+static int gp2ap020a00f_exec_cmd(struct gp2ap020a00f_data *data,
+ enum gp2ap020a00f_cmd cmd)
+{
+ int err = 0;
+
+ switch (cmd) {
+ case GP2AP020A00F_CMD_READ_RAW_CLEAR:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_CLEAR);
+ break;
+ case GP2AP020A00F_CMD_READ_RAW_IR:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_IR);
+ break;
+ case GP2AP020A00F_CMD_READ_RAW_PROXIMITY:
+ if (data->cur_opmode != GP2AP020A00F_OPMODE_SHUTDOWN)
+ return -EBUSY;
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_CLEAR_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data))
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ set_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &data->flags);
+ if (gp2ap020a00f_als_enabled(data))
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_IR_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data))
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ set_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_IR_DIS:
+ clear_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &data->flags);
+ if (gp2ap020a00f_als_enabled(data))
+ break;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_PROX_EN:
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_ADD_MODE);
+ set_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
+ break;
+ case GP2AP020A00F_CMD_TRIGGER_PROX_DIS:
+ clear_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &data->flags);
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_PS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ break;
+ case GP2AP020A00F_CMD_ALS_HIGH_EV_EN:
+ if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
+ return 0;
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TH, true);
+ break;
+ case GP2AP020A00F_CMD_ALS_HIGH_EV_DIS:
+ if (!test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags))
+ return 0;
+ clear_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags);
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ if (err < 0)
+ return err;
+ }
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TH, false);
+ break;
+ case GP2AP020A00F_CMD_ALS_LOW_EV_EN:
+ if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
+ return 0;
+ if (data->cur_opmode == GP2AP020A00F_OPMODE_PROX_DETECT)
+ return -EBUSY;
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_ADD_MODE);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TL, true);
+ break;
+ case GP2AP020A00F_CMD_ALS_LOW_EV_DIS:
+ if (!test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags))
+ return 0;
+ clear_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags);
+ if (!gp2ap020a00f_als_enabled(data)) {
+ err = gp2ap020a00f_alter_opmode(data,
+ GP2AP020A00F_OPMODE_ALS,
+ GP2AP020A00F_SUBTRACT_MODE);
+ if (err < 0)
+ return err;
+ }
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TL, false);
+ break;
+ case GP2AP020A00F_CMD_PROX_HIGH_EV_EN:
+ if (test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
+ return 0;
+ if (gp2ap020a00f_als_enabled(data) ||
+ data->cur_opmode == GP2AP020A00F_OPMODE_PS)
+ return -EBUSY;
+ if (!gp2ap020a00f_prox_detect_enabled(data)) {
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_PROX_DETECT);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_PH, true);
+ break;
+ case GP2AP020A00F_CMD_PROX_HIGH_EV_DIS:
+ if (!test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags))
+ return 0;
+ clear_bit(GP2AP020A00F_FLAG_PROX_RISING_EV, &data->flags);
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_SHUTDOWN);
+ if (err < 0)
+ return err;
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_PH, false);
+ break;
+ case GP2AP020A00F_CMD_PROX_LOW_EV_EN:
+ if (test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
+ return 0;
+ if (gp2ap020a00f_als_enabled(data) ||
+ data->cur_opmode == GP2AP020A00F_OPMODE_PS)
+ return -EBUSY;
+ if (!gp2ap020a00f_prox_detect_enabled(data)) {
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_PROX_DETECT);
+ if (err < 0)
+ return err;
+ }
+ set_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_PL, true);
+ break;
+ case GP2AP020A00F_CMD_PROX_LOW_EV_DIS:
+ if (!test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags))
+ return 0;
+ clear_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV, &data->flags);
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_SHUTDOWN);
+ if (err < 0)
+ return err;
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_PL, false);
+ break;
+ }
+
+ return err;
+}
+
+static int wait_conversion_complete_irq(struct gp2ap020a00f_data *data)
+{
+ int ret;
+
+ ret = wait_event_timeout(data->data_ready_queue,
+ test_bit(GP2AP020A00F_FLAG_DATA_READY,
+ &data->flags),
+ GP2AP020A00F_DATA_READY_TIMEOUT);
+ clear_bit(GP2AP020A00F_FLAG_DATA_READY, &data->flags);
+
+ return ret > 0 ? 0 : -ETIME;
+}
+
+static int gp2ap020a00f_read_output(struct gp2ap020a00f_data *data,
+ unsigned int output_reg, int *val)
+{
+ u8 reg_buf[2];
+ int err;
+
+ err = wait_conversion_complete_irq(data);
+ if (err < 0)
+ dev_dbg(&data->client->dev, "data ready timeout\n");
+
+ err = regmap_bulk_read(data->regmap, output_reg, reg_buf, 2);
+ if (err < 0)
+ return err;
+
+ *val = le16_to_cpup((__le16 *)reg_buf);
+
+ return err;
+}
+
+static bool gp2ap020a00f_adjust_lux_mode(struct gp2ap020a00f_data *data,
+ int output_val)
+{
+ u8 new_range = 0xff;
+ int err;
+
+ if (!test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags)) {
+ if (output_val > 16000) {
+ set_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
+ new_range = GP2AP020A00F_RANGE_A_x128;
+ }
+ } else {
+ if (output_val < 1000) {
+ clear_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags);
+ new_range = GP2AP020A00F_RANGE_A_x8;
+ }
+ }
+
+ if (new_range != 0xff) {
+ /* Clear als threshold registers to avoid spurious
+ * events caused by lux mode transition.
+ */
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TH, false);
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Clearing als threshold register failed.\n");
+ return false;
+ }
+
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TL, false);
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Clearing als threshold register failed.\n");
+ return false;
+ }
+
+ /* Change lux mode */
+ err = regmap_update_bits(data->regmap,
+ GP2AP020A00F_OP_REG,
+ GP2AP020A00F_OP3_MASK,
+ GP2AP020A00F_OP3_SHUTDOWN);
+
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Shutting down the device failed.\n");
+ return false;
+ }
+
+ err = regmap_update_bits(data->regmap,
+ GP2AP020A00F_ALS_REG,
+ GP2AP020A00F_RANGE_A_MASK,
+ new_range);
+
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Adjusting device lux mode failed.\n");
+ return false;
+ }
+
+ err = regmap_update_bits(data->regmap,
+ GP2AP020A00F_OP_REG,
+ GP2AP020A00F_OP3_MASK,
+ GP2AP020A00F_OP3_OPERATION);
+
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Powering up the device failed.\n");
+ return false;
+ }
+
+ /* Adjust als threshold register values to the new lux mode */
+ if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &data->flags)) {
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TH, true);
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Adjusting als threshold value failed.\n");
+ return false;
+ }
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &data->flags)) {
+ err = gp2ap020a00f_write_event_threshold(data,
+ GP2AP020A00F_THRESH_TL, true);
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "Adjusting als threshold value failed.\n");
+ return false;
+ }
+ }
+
+ return true;
+ }
+
+ return false;
+}
+
+static void gp2ap020a00f_output_to_lux(struct gp2ap020a00f_data *data,
+ int *output_val)
+{
+ if (test_bit(GP2AP020A00F_FLAG_LUX_MODE_HI, &data->flags))
+ *output_val *= 16;
+}
+
+static void gp2ap020a00f_iio_trigger_work(struct irq_work *work)
+{
+ struct gp2ap020a00f_data *data =
+ container_of(work, struct gp2ap020a00f_data, work);
+
+ iio_trigger_poll(data->trig);
+}
+
+static irqreturn_t gp2ap020a00f_prox_sensing_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
+ unsigned int op_reg_val;
+ int ret;
+
+ /* Read interrupt flags */
+ ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG, &op_reg_val);
+ if (ret < 0)
+ return IRQ_HANDLED;
+
+ if (gp2ap020a00f_prox_detect_enabled(priv)) {
+ if (op_reg_val & GP2AP020A00F_PROX_DETECT) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(
+ IIO_PROXIMITY,
+ GP2AP020A00F_SCAN_MODE_PROXIMITY,
+ IIO_EV_TYPE_ROC,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns(indio_dev));
+ } else {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(
+ IIO_PROXIMITY,
+ GP2AP020A00F_SCAN_MODE_PROXIMITY,
+ IIO_EV_TYPE_ROC,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns(indio_dev));
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t gp2ap020a00f_thresh_event_handler(int irq, void *data)
+{
+ struct iio_dev *indio_dev = data;
+ struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
+ u8 op_reg_flags, d0_reg_buf[2];
+ unsigned int output_val, op_reg_val;
+ int thresh_val_id, ret;
+
+ /* Read interrupt flags */
+ ret = regmap_read(priv->regmap, GP2AP020A00F_OP_REG,
+ &op_reg_val);
+ if (ret < 0)
+ goto done;
+
+ op_reg_flags = op_reg_val & (GP2AP020A00F_FLAG_A | GP2AP020A00F_FLAG_P
+ | GP2AP020A00F_PROX_DETECT);
+
+ op_reg_val &= (~GP2AP020A00F_FLAG_A & ~GP2AP020A00F_FLAG_P
+ & ~GP2AP020A00F_PROX_DETECT);
+
+ /* Clear interrupt flags (if not in INTTYPE_PULSE mode) */
+ if (priv->cur_opmode != GP2AP020A00F_OPMODE_PROX_DETECT) {
+ ret = regmap_write(priv->regmap, GP2AP020A00F_OP_REG,
+ op_reg_val);
+ if (ret < 0)
+ goto done;
+ }
+
+ if (op_reg_flags & GP2AP020A00F_FLAG_A) {
+ /* Check D0 register to assess if the lux mode
+ * transition is required.
+ */
+ ret = regmap_bulk_read(priv->regmap, GP2AP020A00F_D0_L_REG,
+ d0_reg_buf, 2);
+ if (ret < 0)
+ goto done;
+
+ output_val = le16_to_cpup((__le16 *)d0_reg_buf);
+
+ if (gp2ap020a00f_adjust_lux_mode(priv, output_val))
+ goto done;
+
+ gp2ap020a00f_output_to_lux(priv, &output_val);
+
+ /*
+ * We need to check output value to distinguish
+ * between high and low ambient light threshold event.
+ */
+ if (test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV, &priv->flags)) {
+ thresh_val_id =
+ GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TH_L_REG);
+ if (output_val > priv->thresh_val[thresh_val_id])
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(
+ IIO_LIGHT,
+ GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ IIO_MOD_LIGHT_CLEAR,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns(indio_dev));
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV, &priv->flags)) {
+ thresh_val_id =
+ GP2AP020A00F_THRESH_VAL_ID(GP2AP020A00F_TL_L_REG);
+ if (output_val < priv->thresh_val[thresh_val_id])
+ iio_push_event(indio_dev,
+ IIO_MOD_EVENT_CODE(
+ IIO_LIGHT,
+ GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ IIO_MOD_LIGHT_CLEAR,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns(indio_dev));
+ }
+ }
+
+ if (priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_CLEAR ||
+ priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_IR ||
+ priv->cur_opmode == GP2AP020A00F_OPMODE_READ_RAW_PROXIMITY) {
+ set_bit(GP2AP020A00F_FLAG_DATA_READY, &priv->flags);
+ wake_up(&priv->data_ready_queue);
+ goto done;
+ }
+
+ if (test_bit(GP2AP020A00F_FLAG_ALS_CLEAR_TRIGGER, &priv->flags) ||
+ test_bit(GP2AP020A00F_FLAG_ALS_IR_TRIGGER, &priv->flags) ||
+ test_bit(GP2AP020A00F_FLAG_PROX_TRIGGER, &priv->flags))
+ /* This fires off the trigger. */
+ irq_work_queue(&priv->work);
+
+done:
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data)
+{
+ struct iio_poll_func *pf = data;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct gp2ap020a00f_data *priv = iio_priv(indio_dev);
+ size_t d_size = 0;
+ int i, out_val, ret;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = regmap_bulk_read(priv->regmap,
+ GP2AP020A00F_DATA_REG(i),
+ &priv->buffer[d_size], 2);
+ if (ret < 0)
+ goto done;
+
+ if (i == GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR ||
+ i == GP2AP020A00F_SCAN_MODE_LIGHT_IR) {
+ out_val = le16_to_cpup((__le16 *)&priv->buffer[d_size]);
+ gp2ap020a00f_output_to_lux(priv, &out_val);
+
+ put_unaligned_le32(out_val, &priv->buffer[d_size]);
+ d_size += 4;
+ } else {
+ d_size += 2;
+ }
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, priv->buffer,
+ pf->timestamp);
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan,
+ enum iio_event_direction event_dir)
+{
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ if (event_dir == IIO_EV_DIR_RISING)
+ return GP2AP020A00F_PH_L_REG;
+ else
+ return GP2AP020A00F_PL_L_REG;
+ case IIO_LIGHT:
+ if (event_dir == IIO_EV_DIR_RISING)
+ return GP2AP020A00F_TH_L_REG;
+ else
+ return GP2AP020A00F_TL_L_REG;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ bool event_en = false;
+ u8 thresh_val_id;
+ u8 thresh_reg_l;
+ int err = 0;
+
+ mutex_lock(&data->lock);
+
+ thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
+ thresh_val_id = GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l);
+
+ if (thresh_val_id > GP2AP020A00F_THRESH_PH) {
+ err = -EINVAL;
+ goto error_unlock;
+ }
+
+ switch (thresh_reg_l) {
+ case GP2AP020A00F_TH_L_REG:
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
+ &data->flags);
+ break;
+ case GP2AP020A00F_TL_L_REG:
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
+ &data->flags);
+ break;
+ case GP2AP020A00F_PH_L_REG:
+ if (val == 0) {
+ err = -EINVAL;
+ goto error_unlock;
+ }
+ event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
+ &data->flags);
+ break;
+ case GP2AP020A00F_PL_L_REG:
+ if (val == 0) {
+ err = -EINVAL;
+ goto error_unlock;
+ }
+ event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
+ &data->flags);
+ break;
+ }
+
+ data->thresh_val[thresh_val_id] = val;
+ err = gp2ap020a00f_write_event_threshold(data, thresh_val_id,
+ event_en);
+error_unlock:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ u8 thresh_reg_l;
+ int err = IIO_VAL_INT;
+
+ mutex_lock(&data->lock);
+
+ thresh_reg_l = gp2ap020a00f_get_thresh_reg(chan, dir);
+
+ if (thresh_reg_l > GP2AP020A00F_PH_L_REG) {
+ err = -EINVAL;
+ goto error_unlock;
+ }
+
+ *val = data->thresh_val[GP2AP020A00F_THRESH_VAL_ID(thresh_reg_l)];
+
+error_unlock:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_write_prox_event_config(struct iio_dev *indio_dev,
+ int state)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ enum gp2ap020a00f_cmd cmd_high_ev, cmd_low_ev;
+ int err;
+
+ cmd_high_ev = state ? GP2AP020A00F_CMD_PROX_HIGH_EV_EN :
+ GP2AP020A00F_CMD_PROX_HIGH_EV_DIS;
+ cmd_low_ev = state ? GP2AP020A00F_CMD_PROX_LOW_EV_EN :
+ GP2AP020A00F_CMD_PROX_LOW_EV_DIS;
+
+ /*
+ * In order to enable proximity detection feature in the device
+ * both high and low threshold registers have to be written
+ * with different values, greater than zero.
+ */
+ if (state) {
+ if (data->thresh_val[GP2AP020A00F_THRESH_PL] == 0)
+ return -EINVAL;
+
+ if (data->thresh_val[GP2AP020A00F_THRESH_PH] == 0)
+ return -EINVAL;
+ }
+
+ err = gp2ap020a00f_exec_cmd(data, cmd_high_ev);
+ if (err < 0)
+ return err;
+
+ err = gp2ap020a00f_exec_cmd(data, cmd_low_ev);
+ if (err < 0)
+ return err;
+
+ free_irq(data->client->irq, indio_dev);
+
+ if (state)
+ err = request_threaded_irq(data->client->irq, NULL,
+ &gp2ap020a00f_prox_sensing_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "gp2ap020a00f_prox_sensing",
+ indio_dev);
+ else {
+ err = request_threaded_irq(data->client->irq, NULL,
+ &gp2ap020a00f_thresh_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "gp2ap020a00f_thresh_event",
+ indio_dev);
+ }
+
+ return err;
+}
+
+static int gp2ap020a00f_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ enum gp2ap020a00f_cmd cmd;
+ int err;
+
+ mutex_lock(&data->lock);
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ err = gp2ap020a00f_write_prox_event_config(indio_dev, state);
+ break;
+ case IIO_LIGHT:
+ if (dir == IIO_EV_DIR_RISING) {
+ cmd = state ? GP2AP020A00F_CMD_ALS_HIGH_EV_EN :
+ GP2AP020A00F_CMD_ALS_HIGH_EV_DIS;
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ } else {
+ cmd = state ? GP2AP020A00F_CMD_ALS_LOW_EV_EN :
+ GP2AP020A00F_CMD_ALS_LOW_EV_DIS;
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ }
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int event_en = 0;
+
+ mutex_lock(&data->lock);
+
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ if (dir == IIO_EV_DIR_RISING)
+ event_en = test_bit(GP2AP020A00F_FLAG_PROX_RISING_EV,
+ &data->flags);
+ else
+ event_en = test_bit(GP2AP020A00F_FLAG_PROX_FALLING_EV,
+ &data->flags);
+ break;
+ case IIO_LIGHT:
+ if (dir == IIO_EV_DIR_RISING)
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_RISING_EV,
+ &data->flags);
+ else
+ event_en = test_bit(GP2AP020A00F_FLAG_ALS_FALLING_EV,
+ &data->flags);
+ break;
+ default:
+ event_en = -EINVAL;
+ break;
+ }
+
+ mutex_unlock(&data->lock);
+
+ return event_en;
+}
+
+static int gp2ap020a00f_read_channel(struct gp2ap020a00f_data *data,
+ struct iio_chan_spec const *chan, int *val)
+{
+ enum gp2ap020a00f_cmd cmd;
+ int err;
+
+ switch (chan->scan_index) {
+ case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
+ cmd = GP2AP020A00F_CMD_READ_RAW_CLEAR;
+ break;
+ case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
+ cmd = GP2AP020A00F_CMD_READ_RAW_IR;
+ break;
+ case GP2AP020A00F_SCAN_MODE_PROXIMITY:
+ cmd = GP2AP020A00F_CMD_READ_RAW_PROXIMITY;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ err = gp2ap020a00f_exec_cmd(data, cmd);
+ if (err < 0) {
+ dev_err(&data->client->dev,
+ "gp2ap020a00f_exec_cmd failed\n");
+ goto error_ret;
+ }
+
+ err = gp2ap020a00f_read_output(data, chan->address, val);
+ if (err < 0)
+ dev_err(&data->client->dev,
+ "gp2ap020a00f_read_output failed\n");
+
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_SHUTDOWN);
+ if (err < 0)
+ dev_err(&data->client->dev,
+ "Failed to shut down the device.\n");
+
+ if (cmd == GP2AP020A00F_CMD_READ_RAW_CLEAR ||
+ cmd == GP2AP020A00F_CMD_READ_RAW_IR)
+ gp2ap020a00f_output_to_lux(data, val);
+
+error_ret:
+ return err;
+}
+
+static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int err = -EINVAL;
+
+ if (mask == IIO_CHAN_INFO_RAW) {
+ err = iio_device_claim_direct_mode(indio_dev);
+ if (err)
+ return err;
+
+ err = gp2ap020a00f_read_channel(data, chan, val);
+ iio_device_release_direct_mode(indio_dev);
+ }
+ return err < 0 ? err : IIO_VAL_INT;
+}
+
+static const struct iio_event_spec gp2ap020a00f_event_spec_light[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_event_spec gp2ap020a00f_event_spec_prox[] = {
+ {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_ROC,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec gp2ap020a00f_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .channel2 = IIO_MOD_LIGHT_CLEAR,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 24,
+ .shift = 0,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR,
+ .address = GP2AP020A00F_D0_L_REG,
+ .event_spec = gp2ap020a00f_event_spec_light,
+ .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_light),
+ },
+ {
+ .type = IIO_LIGHT,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .modified = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 24,
+ .shift = 0,
+ .storagebits = 32,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_LIGHT_IR,
+ .address = GP2AP020A00F_D1_L_REG,
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .modified = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .shift = 0,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ .scan_index = GP2AP020A00F_SCAN_MODE_PROXIMITY,
+ .address = GP2AP020A00F_D2_L_REG,
+ .event_spec = gp2ap020a00f_event_spec_prox,
+ .num_event_specs = ARRAY_SIZE(gp2ap020a00f_event_spec_prox),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(GP2AP020A00F_CHAN_TIMESTAMP),
+};
+
+static const struct iio_info gp2ap020a00f_info = {
+ .read_raw = &gp2ap020a00f_read_raw,
+ .read_event_value = &gp2ap020a00f_read_event_val,
+ .read_event_config = &gp2ap020a00f_read_event_config,
+ .write_event_value = &gp2ap020a00f_write_event_val,
+ .write_event_config = &gp2ap020a00f_write_event_config,
+};
+
+static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int i, err = 0;
+
+ mutex_lock(&data->lock);
+
+ /*
+ * Enable triggers according to the scan_mask. Enabling either
+ * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS
+ * module in the device, which generates samples in both D0 (clear)
+ * and D1 (ir) registers. As the two registers are bound to the
+ * two separate IIO channels they are treated in the driver logic
+ * as if they were controlled independently.
+ */
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ switch (i) {
+ case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_EN);
+ break;
+ case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_IR_EN);
+ break;
+ case GP2AP020A00F_SCAN_MODE_PROXIMITY:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_PROX_EN);
+ break;
+ }
+ }
+
+ if (err < 0)
+ goto error_unlock;
+
+ data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
+ if (!data->buffer) {
+ err = -ENOMEM;
+ goto error_unlock;
+ }
+
+ err = iio_triggered_buffer_postenable(indio_dev);
+
+error_unlock:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int i, err;
+
+ mutex_lock(&data->lock);
+
+ err = iio_triggered_buffer_predisable(indio_dev);
+ if (err < 0)
+ goto error_unlock;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ switch (i) {
+ case GP2AP020A00F_SCAN_MODE_LIGHT_CLEAR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_CLEAR_DIS);
+ break;
+ case GP2AP020A00F_SCAN_MODE_LIGHT_IR:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_IR_DIS);
+ break;
+ case GP2AP020A00F_SCAN_MODE_PROXIMITY:
+ err = gp2ap020a00f_exec_cmd(data,
+ GP2AP020A00F_CMD_TRIGGER_PROX_DIS);
+ break;
+ }
+ }
+
+ if (err == 0)
+ kfree(data->buffer);
+
+error_unlock:
+ mutex_unlock(&data->lock);
+
+ return err;
+}
+
+static const struct iio_buffer_setup_ops gp2ap020a00f_buffer_setup_ops = {
+ .postenable = &gp2ap020a00f_buffer_postenable,
+ .predisable = &gp2ap020a00f_buffer_predisable,
+};
+
+static const struct iio_trigger_ops gp2ap020a00f_trigger_ops = {
+};
+
+static int gp2ap020a00f_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gp2ap020a00f_data *data;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+
+ data->vled_reg = devm_regulator_get(&client->dev, "vled");
+ if (IS_ERR(data->vled_reg))
+ return PTR_ERR(data->vled_reg);
+
+ err = regulator_enable(data->vled_reg);
+ if (err)
+ return err;
+
+ regmap = devm_regmap_init_i2c(client, &gp2ap020a00f_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Regmap initialization failed.\n");
+ err = PTR_ERR(regmap);
+ goto error_regulator_disable;
+ }
+
+ /* Initialize device registers */
+ err = regmap_bulk_write(regmap, GP2AP020A00F_OP_REG,
+ gp2ap020a00f_reg_init_tab,
+ ARRAY_SIZE(gp2ap020a00f_reg_init_tab));
+
+ if (err < 0) {
+ dev_err(&client->dev, "Device initialization failed.\n");
+ goto error_regulator_disable;
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+
+ data->client = client;
+ data->cur_opmode = GP2AP020A00F_OPMODE_SHUTDOWN;
+ data->regmap = regmap;
+ init_waitqueue_head(&data->data_ready_queue);
+
+ mutex_init(&data->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = gp2ap020a00f_channels;
+ indio_dev->num_channels = ARRAY_SIZE(gp2ap020a00f_channels);
+ indio_dev->info = &gp2ap020a00f_info;
+ indio_dev->name = id->name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ /* Allocate buffer */
+ err = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ &gp2ap020a00f_trigger_handler, &gp2ap020a00f_buffer_setup_ops);
+ if (err < 0)
+ goto error_regulator_disable;
+
+ /* Allocate trigger */
+ data->trig = devm_iio_trigger_alloc(&client->dev, "%s-trigger",
+ indio_dev->name);
+ if (data->trig == NULL) {
+ err = -ENOMEM;
+ dev_err(&indio_dev->dev, "Failed to allocate iio trigger.\n");
+ goto error_uninit_buffer;
+ }
+
+ /* This needs to be requested here for read_raw calls to work. */
+ err = request_threaded_irq(client->irq, NULL,
+ &gp2ap020a00f_thresh_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "gp2ap020a00f_als_event",
+ indio_dev);
+ if (err < 0) {
+ dev_err(&client->dev, "Irq request failed.\n");
+ goto error_uninit_buffer;
+ }
+
+ data->trig->ops = &gp2ap020a00f_trigger_ops;
+ data->trig->dev.parent = &data->client->dev;
+
+ init_irq_work(&data->work, gp2ap020a00f_iio_trigger_work);
+
+ err = iio_trigger_register(data->trig);
+ if (err < 0) {
+ dev_err(&client->dev, "Failed to register iio trigger.\n");
+ goto error_free_irq;
+ }
+
+ err = iio_device_register(indio_dev);
+ if (err < 0)
+ goto error_trigger_unregister;
+
+ return 0;
+
+error_trigger_unregister:
+ iio_trigger_unregister(data->trig);
+error_free_irq:
+ free_irq(client->irq, indio_dev);
+error_uninit_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_regulator_disable:
+ regulator_disable(data->vled_reg);
+
+ return err;
+}
+
+static int gp2ap020a00f_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct gp2ap020a00f_data *data = iio_priv(indio_dev);
+ int err;
+
+ err = gp2ap020a00f_set_operation_mode(data,
+ GP2AP020A00F_OPMODE_SHUTDOWN);
+ if (err < 0)
+ dev_err(&indio_dev->dev, "Failed to power off the device.\n");
+
+ iio_device_unregister(indio_dev);
+ iio_trigger_unregister(data->trig);
+ free_irq(client->irq, indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ regulator_disable(data->vled_reg);
+
+ return 0;
+}
+
+static const struct i2c_device_id gp2ap020a00f_id[] = {
+ { GP2A_I2C_NAME, 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, gp2ap020a00f_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id gp2ap020a00f_of_match[] = {
+ { .compatible = "sharp,gp2ap020a00f" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, gp2ap020a00f_of_match);
+#endif
+
+static struct i2c_driver gp2ap020a00f_driver = {
+ .driver = {
+ .name = GP2A_I2C_NAME,
+ .of_match_table = of_match_ptr(gp2ap020a00f_of_match),
+ },
+ .probe = gp2ap020a00f_probe,
+ .remove = gp2ap020a00f_remove,
+ .id_table = gp2ap020a00f_id,
+};
+
+module_i2c_driver(gp2ap020a00f_driver);
+
+MODULE_AUTHOR("Jacek Anaszewski <j.anaszewski@samsung.com>");
+MODULE_DESCRIPTION("Sharp GP2AP020A00F Proximity/ALS sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
new file mode 100644
index 0000000..94f3325
--- /dev/null
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -0,0 +1,405 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2012, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+enum {
+ CHANNEL_SCAN_INDEX_INTENSITY = 0,
+ CHANNEL_SCAN_INDEX_ILLUM = 1,
+ CHANNEL_SCAN_INDEX_MAX
+};
+
+struct als_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info als_illum;
+ u32 illum[CHANNEL_SCAN_INDEX_MAX];
+ int scale_pre_decml;
+ int scale_post_decml;
+ int scale_precision;
+ int value_offset;
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec als_channels[] = {
+ {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_INTENSITY,
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_ILLUM,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void als_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ channels[channel].scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct als_state *als_state = iio_priv(indio_dev);
+ int report_id = -1;
+ u32 address;
+ int ret_type;
+ s32 min;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->scan_index) {
+ case CHANNEL_SCAN_INDEX_INTENSITY:
+ case CHANNEL_SCAN_INDEX_ILLUM:
+ report_id = als_state->als_illum.report_id;
+ min = als_state->als_illum.logical_minimum;
+ address = HID_USAGE_SENSOR_LIGHT_ILLUM;
+ break;
+ default:
+ report_id = -1;
+ break;
+ }
+ if (report_id >= 0) {
+ hid_sensor_power_state(&als_state->common_attributes,
+ true);
+ *val = sensor_hub_input_attr_get_raw_value(
+ als_state->common_attributes.hsdev,
+ HID_USAGE_SENSOR_ALS, address,
+ report_id,
+ SENSOR_HUB_SYNC,
+ min < 0);
+ hid_sensor_power_state(&als_state->common_attributes,
+ false);
+ } else {
+ *val = 0;
+ return -EINVAL;
+ }
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = als_state->scale_pre_decml;
+ *val2 = als_state->scale_post_decml;
+ ret_type = als_state->scale_precision;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = als_state->value_offset;
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &als_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &als_state->common_attributes, val, val2);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int als_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct als_state *als_state = iio_priv(indio_dev);
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &als_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &als_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info als_info = {
+ .read_raw = &als_read_raw,
+ .write_raw = &als_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
+ int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ iio_push_to_buffers(indio_dev, data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int als_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct als_state *als_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "als_proc_event\n");
+ if (atomic_read(&als_state->common_attributes.data_ready))
+ hid_sensor_push_data(indio_dev,
+ &als_state->illum,
+ sizeof(als_state->illum));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int als_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct als_state *als_state = iio_priv(indio_dev);
+ int ret = -EINVAL;
+ u32 sample_data = *(u32 *)raw_data;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_LIGHT_ILLUM:
+ als_state->illum[CHANNEL_SCAN_INDEX_INTENSITY] = sample_data;
+ als_state->illum[CHANNEL_SCAN_INDEX_ILLUM] = sample_data;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int als_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct als_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_LIGHT_ILLUM,
+ &st->als_illum);
+ if (ret < 0)
+ return ret;
+ als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_INTENSITY,
+ st->als_illum.size);
+ als_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_ILLUM,
+ st->als_illum.size);
+
+ dev_dbg(&pdev->dev, "als %x:%x\n", st->als_illum.index,
+ st->als_illum.report_id);
+
+ st->scale_precision = hid_sensor_format_scale(
+ HID_USAGE_SENSOR_ALS,
+ &st->als_illum,
+ &st->scale_pre_decml, &st->scale_post_decml);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_LIGHT,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_als_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ static const char *name = "als";
+ struct iio_dev *indio_dev;
+ struct als_state *als_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
+ if (!indio_dev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, indio_dev);
+
+ als_state = iio_priv(indio_dev);
+ als_state->common_attributes.hsdev = hsdev;
+ als_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_ALS,
+ &als_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ indio_dev->channels = kmemdup(als_channels,
+ sizeof(als_channels), GFP_KERNEL);
+ if (!indio_dev->channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = als_parse_report(pdev, hsdev,
+ (struct iio_chan_spec *)indio_dev->channels,
+ HID_USAGE_SENSOR_ALS, als_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ goto error_free_dev_mem;
+ }
+
+ indio_dev->num_channels =
+ ARRAY_SIZE(als_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &als_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ atomic_set(&als_state->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &als_state->common_attributes);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ als_state->callbacks.send_event = als_proc_event;
+ als_state->callbacks.capture_sample = als_capture_sample;
+ als_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_ALS,
+ &als_state->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return ret;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&als_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_als_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct als_state *als_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&als_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+
+ return 0;
+}
+
+static const struct platform_device_id hid_als_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-200041",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_als_ids);
+
+static struct platform_driver hid_als_platform_driver = {
+ .id_table = hid_als_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .pm = &hid_sensor_pm_ops,
+ },
+ .probe = hid_als_probe,
+ .remove = hid_als_remove,
+};
+module_platform_driver(hid_als_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor ALS");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
new file mode 100644
index 0000000..cf5a0c2
--- /dev/null
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -0,0 +1,382 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+#define CHANNEL_SCAN_INDEX_PRESENCE 0
+
+struct prox_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info prox_attr;
+ u32 human_presence;
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec prox_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ channels[channel].scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int prox_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int report_id = -1;
+ u32 address;
+ int ret_type;
+ s32 min;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->scan_index) {
+ case CHANNEL_SCAN_INDEX_PRESENCE:
+ report_id = prox_state->prox_attr.report_id;
+ min = prox_state->prox_attr.logical_minimum;
+ address = HID_USAGE_SENSOR_HUMAN_PRESENCE;
+ break;
+ default:
+ report_id = -1;
+ break;
+ }
+ if (report_id >= 0) {
+ hid_sensor_power_state(&prox_state->common_attributes,
+ true);
+ *val = sensor_hub_input_attr_get_raw_value(
+ prox_state->common_attributes.hsdev,
+ HID_USAGE_SENSOR_PROX, address,
+ report_id,
+ SENSOR_HUB_SYNC,
+ min < 0);
+ hid_sensor_power_state(&prox_state->common_attributes,
+ false);
+ } else {
+ *val = 0;
+ return -EINVAL;
+ }
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = prox_state->prox_attr.units;
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = hid_sensor_convert_exponent(
+ prox_state->prox_attr.unit_expo);
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret_type = hid_sensor_read_samp_freq_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret_type = hid_sensor_read_raw_hyst_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int prox_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info prox_info = {
+ .read_raw = &prox_read_raw,
+ .write_raw = &prox_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
+ int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ iio_push_to_buffers(indio_dev, data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "prox_proc_event\n");
+ if (atomic_read(&prox_state->common_attributes.data_ready))
+ hid_sensor_push_data(indio_dev,
+ &prox_state->human_presence,
+ sizeof(prox_state->human_presence));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_HUMAN_PRESENCE:
+ prox_state->human_presence = *(u32 *)raw_data;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int prox_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct prox_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_HUMAN_PRESENCE,
+ &st->prox_attr);
+ if (ret < 0)
+ return ret;
+ prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
+ st->prox_attr.size);
+
+ dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
+ st->prox_attr.report_id);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_PRESENCE,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+ if (st->common_attributes.sensitivity.index < 0)
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_HUMAN_PRESENCE,
+ &st->common_attributes.sensitivity);
+
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_prox_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ static const char *name = "prox";
+ struct iio_dev *indio_dev;
+ struct prox_state *prox_state;
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev,
+ sizeof(struct prox_state));
+ if (!indio_dev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, indio_dev);
+
+ prox_state = iio_priv(indio_dev);
+ prox_state->common_attributes.hsdev = hsdev;
+ prox_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
+ &prox_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ indio_dev->channels = kmemdup(prox_channels, sizeof(prox_channels),
+ GFP_KERNEL);
+ if (!indio_dev->channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = prox_parse_report(pdev, hsdev,
+ (struct iio_chan_spec *)indio_dev->channels,
+ HID_USAGE_SENSOR_PROX, prox_state);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup attributes\n");
+ goto error_free_dev_mem;
+ }
+
+ indio_dev->num_channels = ARRAY_SIZE(prox_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &prox_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ atomic_set(&prox_state->common_attributes.data_ready, 0);
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &prox_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ prox_state->callbacks.send_event = prox_proc_event;
+ prox_state->callbacks.capture_sample = prox_capture_sample;
+ prox_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
+ &prox_state->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return ret;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&prox_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_prox_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&prox_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+
+ return 0;
+}
+
+static const struct platform_device_id hid_prox_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-200011",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_prox_ids);
+
+static struct platform_driver hid_prox_platform_driver = {
+ .id_table = hid_prox_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .pm = &hid_sensor_pm_ops,
+ },
+ .probe = hid_prox_probe,
+ .remove = hid_prox_remove,
+};
+module_platform_driver(hid_prox_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Proximity");
+MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c
new file mode 100644
index 0000000..b45400f
--- /dev/null
+++ b/drivers/iio/light/isl29018.c
@@ -0,0 +1,847 @@
+/*
+ * A iio driver for the light sensor ISL 29018/29023/29035.
+ *
+ * IIO driver for monitoring ambient light intensity in luxi, proximity
+ * sensing and infrared sensing.
+ *
+ * Copyright (c) 2010, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/acpi.h>
+
+#define ISL29018_CONV_TIME_MS 100
+
+#define ISL29018_REG_ADD_COMMAND1 0x00
+#define ISL29018_CMD1_OPMODE_SHIFT 5
+#define ISL29018_CMD1_OPMODE_MASK (7 << ISL29018_CMD1_OPMODE_SHIFT)
+#define ISL29018_CMD1_OPMODE_POWER_DOWN 0
+#define ISL29018_CMD1_OPMODE_ALS_ONCE 1
+#define ISL29018_CMD1_OPMODE_IR_ONCE 2
+#define ISL29018_CMD1_OPMODE_PROX_ONCE 3
+
+#define ISL29018_REG_ADD_COMMAND2 0x01
+#define ISL29018_CMD2_RESOLUTION_SHIFT 2
+#define ISL29018_CMD2_RESOLUTION_MASK (0x3 << ISL29018_CMD2_RESOLUTION_SHIFT)
+
+#define ISL29018_CMD2_RANGE_SHIFT 0
+#define ISL29018_CMD2_RANGE_MASK (0x3 << ISL29018_CMD2_RANGE_SHIFT)
+
+#define ISL29018_CMD2_SCHEME_SHIFT 7
+#define ISL29018_CMD2_SCHEME_MASK (0x1 << ISL29018_CMD2_SCHEME_SHIFT)
+
+#define ISL29018_REG_ADD_DATA_LSB 0x02
+#define ISL29018_REG_ADD_DATA_MSB 0x03
+
+#define ISL29018_REG_TEST 0x08
+#define ISL29018_TEST_SHIFT 0
+#define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT)
+
+#define ISL29035_REG_DEVICE_ID 0x0F
+#define ISL29035_DEVICE_ID_SHIFT 0x03
+#define ISL29035_DEVICE_ID_MASK (0x7 << ISL29035_DEVICE_ID_SHIFT)
+#define ISL29035_DEVICE_ID 0x5
+#define ISL29035_BOUT_SHIFT 0x07
+#define ISL29035_BOUT_MASK (0x01 << ISL29035_BOUT_SHIFT)
+
+enum isl29018_int_time {
+ ISL29018_INT_TIME_16,
+ ISL29018_INT_TIME_12,
+ ISL29018_INT_TIME_8,
+ ISL29018_INT_TIME_4,
+};
+
+static const unsigned int isl29018_int_utimes[3][4] = {
+ {90000, 5630, 351, 21},
+ {90000, 5600, 352, 22},
+ {105000, 6500, 410, 25},
+};
+
+static const struct isl29018_scale {
+ unsigned int scale;
+ unsigned int uscale;
+} isl29018_scales[4][4] = {
+ { {0, 15258}, {0, 61035}, {0, 244140}, {0, 976562} },
+ { {0, 244140}, {0, 976562}, {3, 906250}, {15, 625000} },
+ { {3, 906250}, {15, 625000}, {62, 500000}, {250, 0} },
+ { {62, 500000}, {250, 0}, {1000, 0}, {4000, 0} }
+};
+
+struct isl29018_chip {
+ struct regmap *regmap;
+ struct mutex lock;
+ int type;
+ unsigned int calibscale;
+ unsigned int ucalibscale;
+ unsigned int int_time;
+ struct isl29018_scale scale;
+ int prox_scheme;
+ bool suspended;
+};
+
+static int isl29018_set_integration_time(struct isl29018_chip *chip,
+ unsigned int utime)
+{
+ unsigned int i;
+ int ret;
+ unsigned int int_time, new_int_time;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i) {
+ if (utime == isl29018_int_utimes[chip->type][i]) {
+ new_int_time = i;
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(isl29018_int_utimes[chip->type]))
+ return -EINVAL;
+
+ ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_RESOLUTION_MASK,
+ i << ISL29018_CMD2_RESOLUTION_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ /* Keep the same range when integration time changes */
+ int_time = chip->int_time;
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[int_time]); ++i) {
+ if (chip->scale.scale == isl29018_scales[int_time][i].scale &&
+ chip->scale.uscale == isl29018_scales[int_time][i].uscale) {
+ chip->scale = isl29018_scales[new_int_time][i];
+ break;
+ }
+ }
+ chip->int_time = new_int_time;
+
+ return 0;
+}
+
+static int isl29018_set_scale(struct isl29018_chip *chip, int scale, int uscale)
+{
+ unsigned int i;
+ int ret;
+ struct isl29018_scale new_scale;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i) {
+ if (scale == isl29018_scales[chip->int_time][i].scale &&
+ uscale == isl29018_scales[chip->int_time][i].uscale) {
+ new_scale = isl29018_scales[chip->int_time][i];
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(isl29018_scales[chip->int_time]))
+ return -EINVAL;
+
+ ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_RANGE_MASK,
+ i << ISL29018_CMD2_RANGE_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ chip->scale = new_scale;
+
+ return 0;
+}
+
+static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode)
+{
+ int status;
+ unsigned int lsb;
+ unsigned int msb;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ /* Set mode */
+ status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1,
+ mode << ISL29018_CMD1_OPMODE_SHIFT);
+ if (status) {
+ dev_err(dev,
+ "Error in setting operating mode err %d\n", status);
+ return status;
+ }
+ msleep(ISL29018_CONV_TIME_MS);
+ status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb);
+ if (status < 0) {
+ dev_err(dev,
+ "Error in reading LSB DATA with err %d\n", status);
+ return status;
+ }
+
+ status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb);
+ if (status < 0) {
+ dev_err(dev,
+ "Error in reading MSB DATA with error %d\n", status);
+ return status;
+ }
+ dev_vdbg(dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb);
+
+ return (msb << 8) | lsb;
+}
+
+static int isl29018_read_lux(struct isl29018_chip *chip, int *lux)
+{
+ int lux_data;
+ unsigned int data_x_range;
+
+ lux_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_ALS_ONCE);
+ if (lux_data < 0)
+ return lux_data;
+
+ data_x_range = lux_data * chip->scale.scale +
+ lux_data * chip->scale.uscale / 1000000;
+ *lux = data_x_range * chip->calibscale +
+ data_x_range * chip->ucalibscale / 1000000;
+
+ return 0;
+}
+
+static int isl29018_read_ir(struct isl29018_chip *chip, int *ir)
+{
+ int ir_data;
+
+ ir_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_IR_ONCE);
+ if (ir_data < 0)
+ return ir_data;
+
+ *ir = ir_data;
+
+ return 0;
+}
+
+static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme,
+ int *near_ir)
+{
+ int status;
+ int prox_data = -1;
+ int ir_data = -1;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ /* Do proximity sensing with required scheme */
+ status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_SCHEME_MASK,
+ scheme << ISL29018_CMD2_SCHEME_SHIFT);
+ if (status) {
+ dev_err(dev, "Error in setting operating mode\n");
+ return status;
+ }
+
+ prox_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_PROX_ONCE);
+ if (prox_data < 0)
+ return prox_data;
+
+ if (scheme == 1) {
+ *near_ir = prox_data;
+ return 0;
+ }
+
+ ir_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_IR_ONCE);
+ if (ir_data < 0)
+ return ir_data;
+
+ if (prox_data >= ir_data)
+ *near_ir = prox_data - ir_data;
+ else
+ *near_ir = 0;
+
+ return 0;
+}
+
+static ssize_t in_illuminance_scale_available_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int len = 0;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i)
+ len += sprintf(buf + len, "%d.%06d ",
+ isl29018_scales[chip->int_time][i].scale,
+ isl29018_scales[chip->int_time][i].uscale);
+ mutex_unlock(&chip->lock);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t in_illuminance_integration_time_available_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int len = 0;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i)
+ len += sprintf(buf + len, "0.%06d ",
+ isl29018_int_utimes[chip->type][i]);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+/*
+ * From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the
+ * infrared suppression:
+ *
+ * Proximity Sensing Scheme: Bit 7. This bit programs the function
+ * of the proximity detection. Logic 0 of this bit, Scheme 0, makes
+ * full n (4, 8, 12, 16) bits (unsigned) proximity detection. The range
+ * of Scheme 0 proximity count is from 0 to 2^n. Logic 1 of this bit,
+ * Scheme 1, makes n-1 (3, 7, 11, 15) bits (2's complementary)
+ * proximity_less_ambient detection. The range of Scheme 1
+ * proximity count is from -2^(n-1) to 2^(n-1) . The sign bit is extended
+ * for resolutions less than 16. While Scheme 0 has wider dynamic
+ * range, Scheme 1 proximity detection is less affected by the
+ * ambient IR noise variation.
+ *
+ * 0 Sensing IR from LED and ambient
+ * 1 Sensing IR from LED with ambient IR rejection
+ */
+static ssize_t proximity_on_chip_ambient_infrared_suppression_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+
+ /*
+ * Return the "proximity scheme" i.e. if the chip does on chip
+ * infrared suppression (1 means perform on chip suppression)
+ */
+ return sprintf(buf, "%d\n", chip->prox_scheme);
+}
+
+static ssize_t proximity_on_chip_ambient_infrared_suppression_store
+ (struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ int val;
+
+ if (kstrtoint(buf, 10, &val))
+ return -EINVAL;
+ if (!(val == 0 || val == 1))
+ return -EINVAL;
+
+ /*
+ * Get the "proximity scheme" i.e. if the chip does on chip
+ * infrared suppression (1 means perform on chip suppression)
+ */
+ mutex_lock(&chip->lock);
+ chip->prox_scheme = val;
+ mutex_unlock(&chip->lock);
+
+ return count;
+}
+
+static int isl29018_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->lock);
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto write_done;
+ }
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ chip->calibscale = val;
+ chip->ucalibscale = val2;
+ ret = 0;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT && !val)
+ ret = isl29018_set_integration_time(chip, val2);
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT)
+ ret = isl29018_set_scale(chip, val, val2);
+ break;
+ default:
+ break;
+ }
+
+write_done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int isl29018_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ int ret = -EINVAL;
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+
+ mutex_lock(&chip->lock);
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto read_done;
+ }
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = isl29018_read_lux(chip, val);
+ break;
+ case IIO_INTENSITY:
+ ret = isl29018_read_ir(chip, val);
+ break;
+ case IIO_PROXIMITY:
+ ret = isl29018_read_proximity_ir(chip,
+ chip->prox_scheme,
+ val);
+ break;
+ default:
+ break;
+ }
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = isl29018_int_utimes[chip->type][chip->int_time];
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->scale.scale;
+ *val2 = chip->scale.uscale;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->calibscale;
+ *val2 = chip->ucalibscale;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+read_done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+#define ISL29018_LIGHT_CHANNEL { \
+ .type = IIO_LIGHT, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+}
+
+#define ISL29018_IR_CHANNEL { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .channel2 = IIO_MOD_LIGHT_IR, \
+}
+
+#define ISL29018_PROXIMITY_CHANNEL { \
+ .type = IIO_PROXIMITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+}
+
+static const struct iio_chan_spec isl29018_channels[] = {
+ ISL29018_LIGHT_CHANNEL,
+ ISL29018_IR_CHANNEL,
+ ISL29018_PROXIMITY_CHANNEL,
+};
+
+static const struct iio_chan_spec isl29023_channels[] = {
+ ISL29018_LIGHT_CHANNEL,
+ ISL29018_IR_CHANNEL,
+};
+
+static IIO_DEVICE_ATTR_RO(in_illuminance_integration_time_available, 0);
+static IIO_DEVICE_ATTR_RO(in_illuminance_scale_available, 0);
+static IIO_DEVICE_ATTR_RW(proximity_on_chip_ambient_infrared_suppression, 0);
+
+#define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
+
+static struct attribute *isl29018_attributes[] = {
+ ISL29018_DEV_ATTR(in_illuminance_scale_available),
+ ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
+ ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_suppression),
+ NULL
+};
+
+static struct attribute *isl29023_attributes[] = {
+ ISL29018_DEV_ATTR(in_illuminance_scale_available),
+ ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
+ NULL
+};
+
+static const struct attribute_group isl29018_group = {
+ .attrs = isl29018_attributes,
+};
+
+static const struct attribute_group isl29023_group = {
+ .attrs = isl29023_attributes,
+};
+
+enum {
+ isl29018,
+ isl29023,
+ isl29035,
+};
+
+static int isl29018_chip_init(struct isl29018_chip *chip)
+{
+ int status;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ if (chip->type == isl29035) {
+ unsigned int id;
+
+ status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id);
+ if (status < 0) {
+ dev_err(dev,
+ "Error reading ID register with error %d\n",
+ status);
+ return status;
+ }
+
+ id = (id & ISL29035_DEVICE_ID_MASK) >> ISL29035_DEVICE_ID_SHIFT;
+
+ if (id != ISL29035_DEVICE_ID)
+ return -ENODEV;
+
+ /* Clear brownout bit */
+ status = regmap_update_bits(chip->regmap,
+ ISL29035_REG_DEVICE_ID,
+ ISL29035_BOUT_MASK, 0);
+ if (status < 0)
+ return status;
+ }
+
+ /*
+ * Code added per Intersil Application Note 1534:
+ * When VDD sinks to approximately 1.8V or below, some of
+ * the part's registers may change their state. When VDD
+ * recovers to 2.25V (or greater), the part may thus be in an
+ * unknown mode of operation. The user can return the part to
+ * a known mode of operation either by (a) setting VDD = 0V for
+ * 1 second or more and then powering back up with a slew rate
+ * of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX
+ * conversions, clear the test registers, and then rewrite all
+ * registers to the desired values.
+ * ...
+ * For ISL29011, ISL29018, ISL29021, ISL29023
+ * 1. Write 0x00 to register 0x08 (TEST)
+ * 2. Write 0x00 to register 0x00 (CMD1)
+ * 3. Rewrite all registers to the desired values
+ *
+ * ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says
+ * the same thing EXCEPT the data sheet asks for a 1ms delay after
+ * writing the CMD1 register.
+ */
+ status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0);
+ if (status < 0) {
+ dev_err(dev, "Failed to clear isl29018 TEST reg.(%d)\n",
+ status);
+ return status;
+ }
+
+ /*
+ * See Intersil AN1534 comments above.
+ * "Operating Mode" (COMMAND1) register is reprogrammed when
+ * data is read from the device.
+ */
+ status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0);
+ if (status < 0) {
+ dev_err(dev, "Failed to clear isl29018 CMD1 reg.(%d)\n",
+ status);
+ return status;
+ }
+
+ usleep_range(1000, 2000); /* per data sheet, page 10 */
+
+ /* Set defaults */
+ status = isl29018_set_scale(chip, chip->scale.scale,
+ chip->scale.uscale);
+ if (status < 0) {
+ dev_err(dev, "Init of isl29018 fails\n");
+ return status;
+ }
+
+ status = isl29018_set_integration_time(chip,
+ isl29018_int_utimes[chip->type][chip->int_time]);
+ if (status < 0)
+ dev_err(dev, "Init of isl29018 fails\n");
+
+ return status;
+}
+
+static const struct iio_info isl29018_info = {
+ .attrs = &isl29018_group,
+ .read_raw = isl29018_read_raw,
+ .write_raw = isl29018_write_raw,
+};
+
+static const struct iio_info isl29023_info = {
+ .attrs = &isl29023_group,
+ .read_raw = isl29018_read_raw,
+ .write_raw = isl29018_write_raw,
+};
+
+static bool isl29018_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case ISL29018_REG_ADD_DATA_LSB:
+ case ISL29018_REG_ADD_DATA_MSB:
+ case ISL29018_REG_ADD_COMMAND1:
+ case ISL29018_REG_TEST:
+ case ISL29035_REG_DEVICE_ID:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config isl29018_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = isl29018_is_volatile_reg,
+ .max_register = ISL29018_REG_TEST,
+ .num_reg_defaults_raw = ISL29018_REG_TEST + 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_config isl29035_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = isl29018_is_volatile_reg,
+ .max_register = ISL29035_REG_DEVICE_ID,
+ .num_reg_defaults_raw = ISL29035_REG_DEVICE_ID + 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+struct isl29018_chip_info {
+ const struct iio_chan_spec *channels;
+ int num_channels;
+ const struct iio_info *indio_info;
+ const struct regmap_config *regmap_cfg;
+};
+
+static const struct isl29018_chip_info isl29018_chip_info_tbl[] = {
+ [isl29018] = {
+ .channels = isl29018_channels,
+ .num_channels = ARRAY_SIZE(isl29018_channels),
+ .indio_info = &isl29018_info,
+ .regmap_cfg = &isl29018_regmap_config,
+ },
+ [isl29023] = {
+ .channels = isl29023_channels,
+ .num_channels = ARRAY_SIZE(isl29023_channels),
+ .indio_info = &isl29023_info,
+ .regmap_cfg = &isl29018_regmap_config,
+ },
+ [isl29035] = {
+ .channels = isl29023_channels,
+ .num_channels = ARRAY_SIZE(isl29023_channels),
+ .indio_info = &isl29023_info,
+ .regmap_cfg = &isl29035_regmap_config,
+ },
+};
+
+static const char *isl29018_match_acpi_device(struct device *dev, int *data)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+
+ if (!id)
+ return NULL;
+
+ *data = (int)id->driver_data;
+
+ return dev_name(dev);
+}
+
+static int isl29018_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct isl29018_chip *chip;
+ struct iio_dev *indio_dev;
+ int err;
+ const char *name = NULL;
+ int dev_id = 0;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, indio_dev);
+
+ if (id) {
+ name = id->name;
+ dev_id = id->driver_data;
+ }
+
+ if (ACPI_HANDLE(&client->dev))
+ name = isl29018_match_acpi_device(&client->dev, &dev_id);
+
+ mutex_init(&chip->lock);
+
+ chip->type = dev_id;
+ chip->calibscale = 1;
+ chip->ucalibscale = 0;
+ chip->int_time = ISL29018_INT_TIME_16;
+ chip->scale = isl29018_scales[chip->int_time][0];
+ chip->suspended = false;
+
+ chip->regmap = devm_regmap_init_i2c(client,
+ isl29018_chip_info_tbl[dev_id].regmap_cfg);
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "regmap initialization fails: %d\n", err);
+ return err;
+ }
+
+ err = isl29018_chip_init(chip);
+ if (err)
+ return err;
+
+ indio_dev->info = isl29018_chip_info_tbl[dev_id].indio_info;
+ indio_dev->channels = isl29018_chip_info_tbl[dev_id].channels;
+ indio_dev->num_channels = isl29018_chip_info_tbl[dev_id].num_channels;
+ indio_dev->name = name;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int isl29018_suspend(struct device *dev)
+{
+ struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
+
+ mutex_lock(&chip->lock);
+
+ /*
+ * Since this driver uses only polling commands, we are by default in
+ * auto shutdown (ie, power-down) mode.
+ * So we do not have much to do here.
+ */
+ chip->suspended = true;
+
+ mutex_unlock(&chip->lock);
+
+ return 0;
+}
+
+static int isl29018_resume(struct device *dev)
+{
+ struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
+ int err;
+
+ mutex_lock(&chip->lock);
+
+ err = isl29018_chip_init(chip);
+ if (!err)
+ chip->suspended = false;
+
+ mutex_unlock(&chip->lock);
+
+ return err;
+}
+
+static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume);
+#define ISL29018_PM_OPS (&isl29018_pm_ops)
+#else
+#define ISL29018_PM_OPS NULL
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id isl29018_acpi_match[] = {
+ {"ISL29018", isl29018},
+ {"ISL29023", isl29023},
+ {"ISL29035", isl29035},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match);
+#endif
+
+static const struct i2c_device_id isl29018_id[] = {
+ {"isl29018", isl29018},
+ {"isl29023", isl29023},
+ {"isl29035", isl29035},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, isl29018_id);
+
+static const struct of_device_id isl29018_of_match[] = {
+ { .compatible = "isil,isl29018", },
+ { .compatible = "isil,isl29023", },
+ { .compatible = "isil,isl29035", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, isl29018_of_match);
+
+static struct i2c_driver isl29018_driver = {
+ .driver = {
+ .name = "isl29018",
+ .acpi_match_table = ACPI_PTR(isl29018_acpi_match),
+ .pm = ISL29018_PM_OPS,
+ .of_match_table = isl29018_of_match,
+ },
+ .probe = isl29018_probe,
+ .id_table = isl29018_id,
+};
+module_i2c_driver(isl29018_driver);
+
+MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/isl29028.c b/drivers/iio/light/isl29028.c
new file mode 100644
index 0000000..f9912ab
--- /dev/null
+++ b/drivers/iio/light/isl29028.c
@@ -0,0 +1,728 @@
+/*
+ * IIO driver for the light sensor ISL29028.
+ * ISL29028 is Concurrent Ambient Light and Proximity Sensor
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Datasheets:
+ * - http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29028.pdf
+ * - http://www.intersil.com/content/dam/Intersil/documents/isl2/isl29030.pdf
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/pm_runtime.h>
+
+#define ISL29028_CONV_TIME_MS 100
+
+#define ISL29028_REG_CONFIGURE 0x01
+
+#define ISL29028_CONF_ALS_IR_MODE_ALS 0
+#define ISL29028_CONF_ALS_IR_MODE_IR BIT(0)
+#define ISL29028_CONF_ALS_IR_MODE_MASK BIT(0)
+
+#define ISL29028_CONF_ALS_RANGE_LOW_LUX 0
+#define ISL29028_CONF_ALS_RANGE_HIGH_LUX BIT(1)
+#define ISL29028_CONF_ALS_RANGE_MASK BIT(1)
+
+#define ISL29028_CONF_ALS_DIS 0
+#define ISL29028_CONF_ALS_EN BIT(2)
+#define ISL29028_CONF_ALS_EN_MASK BIT(2)
+
+#define ISL29028_CONF_PROX_SLP_SH 4
+#define ISL29028_CONF_PROX_SLP_MASK (7 << ISL29028_CONF_PROX_SLP_SH)
+
+#define ISL29028_CONF_PROX_EN BIT(7)
+#define ISL29028_CONF_PROX_EN_MASK BIT(7)
+
+#define ISL29028_REG_INTERRUPT 0x02
+
+#define ISL29028_REG_PROX_DATA 0x08
+#define ISL29028_REG_ALSIR_L 0x09
+#define ISL29028_REG_ALSIR_U 0x0A
+
+#define ISL29028_REG_TEST1_MODE 0x0E
+#define ISL29028_REG_TEST2_MODE 0x0F
+
+#define ISL29028_NUM_REGS (ISL29028_REG_TEST2_MODE + 1)
+
+#define ISL29028_POWER_OFF_DELAY_MS 2000
+
+struct isl29028_prox_data {
+ int sampling_int;
+ int sampling_fract;
+ int sleep_time;
+};
+
+static const struct isl29028_prox_data isl29028_prox_data[] = {
+ { 1, 250000, 800 },
+ { 2, 500000, 400 },
+ { 5, 0, 200 },
+ { 10, 0, 100 },
+ { 13, 300000, 75 },
+ { 20, 0, 50 },
+ { 80, 0, 13 }, /*
+ * Note: Data sheet lists 12.5 ms sleep time.
+ * Round up a half millisecond for msleep().
+ */
+ { 100, 0, 0 }
+};
+
+enum isl29028_als_ir_mode {
+ ISL29028_MODE_NONE = 0,
+ ISL29028_MODE_ALS,
+ ISL29028_MODE_IR,
+};
+
+struct isl29028_chip {
+ struct mutex lock;
+ struct regmap *regmap;
+ int prox_sampling_int;
+ int prox_sampling_frac;
+ bool enable_prox;
+ int lux_scale;
+ enum isl29028_als_ir_mode als_ir_mode;
+};
+
+static int isl29028_find_prox_sleep_index(int sampling_int, int sampling_fract)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(isl29028_prox_data); ++i) {
+ if (isl29028_prox_data[i].sampling_int == sampling_int &&
+ isl29028_prox_data[i].sampling_fract == sampling_fract)
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int isl29028_set_proxim_sampling(struct isl29028_chip *chip,
+ int sampling_int, int sampling_fract)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int sleep_index, ret;
+
+ sleep_index = isl29028_find_prox_sleep_index(sampling_int,
+ sampling_fract);
+ if (sleep_index < 0)
+ return sleep_index;
+
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_PROX_SLP_MASK,
+ sleep_index << ISL29028_CONF_PROX_SLP_SH);
+
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d setting the proximity sampling\n",
+ __func__, ret);
+ return ret;
+ }
+
+ chip->prox_sampling_int = sampling_int;
+ chip->prox_sampling_frac = sampling_fract;
+
+ return ret;
+}
+
+static int isl29028_enable_proximity(struct isl29028_chip *chip)
+{
+ int prox_index, ret;
+
+ ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling_int,
+ chip->prox_sampling_frac);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_PROX_EN_MASK,
+ ISL29028_CONF_PROX_EN);
+ if (ret < 0)
+ return ret;
+
+ /* Wait for conversion to be complete for first sample */
+ prox_index = isl29028_find_prox_sleep_index(chip->prox_sampling_int,
+ chip->prox_sampling_frac);
+ if (prox_index < 0)
+ return prox_index;
+
+ msleep(isl29028_prox_data[prox_index].sleep_time);
+
+ return 0;
+}
+
+static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int val = (lux_scale == 2000) ? ISL29028_CONF_ALS_RANGE_HIGH_LUX :
+ ISL29028_CONF_ALS_RANGE_LOW_LUX;
+ int ret;
+
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_RANGE_MASK, val);
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d setting the ALS scale\n", __func__,
+ ret);
+ return ret;
+ }
+
+ chip->lux_scale = lux_scale;
+
+ return ret;
+}
+
+static int isl29028_set_als_ir_mode(struct isl29028_chip *chip,
+ enum isl29028_als_ir_mode mode)
+{
+ int ret;
+
+ if (chip->als_ir_mode == mode)
+ return 0;
+
+ ret = isl29028_set_als_scale(chip, chip->lux_scale);
+ if (ret < 0)
+ return ret;
+
+ switch (mode) {
+ case ISL29028_MODE_ALS:
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_IR_MODE_MASK,
+ ISL29028_CONF_ALS_IR_MODE_ALS);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_RANGE_MASK,
+ ISL29028_CONF_ALS_RANGE_HIGH_LUX);
+ break;
+ case ISL29028_MODE_IR:
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_IR_MODE_MASK,
+ ISL29028_CONF_ALS_IR_MODE_IR);
+ break;
+ case ISL29028_MODE_NONE:
+ return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_EN_MASK,
+ ISL29028_CONF_ALS_DIS);
+ }
+
+ if (ret < 0)
+ return ret;
+
+ /* Enable the ALS/IR */
+ ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
+ ISL29028_CONF_ALS_EN_MASK,
+ ISL29028_CONF_ALS_EN);
+ if (ret < 0)
+ return ret;
+
+ /* Need to wait for conversion time if ALS/IR mode enabled */
+ msleep(ISL29028_CONV_TIME_MS);
+
+ chip->als_ir_mode = mode;
+
+ return 0;
+}
+
+static int isl29028_read_als_ir(struct isl29028_chip *chip, int *als_ir)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ unsigned int lsb;
+ unsigned int msb;
+ int ret;
+
+ ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_L, &lsb);
+ if (ret < 0) {
+ dev_err(dev,
+ "%s(): Error %d reading register ALSIR_L\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_U, &msb);
+ if (ret < 0) {
+ dev_err(dev,
+ "%s(): Error %d reading register ALSIR_U\n",
+ __func__, ret);
+ return ret;
+ }
+
+ *als_ir = ((msb & 0xF) << 8) | (lsb & 0xFF);
+
+ return 0;
+}
+
+static int isl29028_read_proxim(struct isl29028_chip *chip, int *prox)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ unsigned int data;
+ int ret;
+
+ if (!chip->enable_prox) {
+ ret = isl29028_enable_proximity(chip);
+ if (ret < 0)
+ return ret;
+
+ chip->enable_prox = true;
+ }
+
+ ret = regmap_read(chip->regmap, ISL29028_REG_PROX_DATA, &data);
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d reading register PROX_DATA\n",
+ __func__, ret);
+ return ret;
+ }
+
+ *prox = data;
+
+ return 0;
+}
+
+static int isl29028_als_get(struct isl29028_chip *chip, int *als_data)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+ int als_ir_data;
+
+ ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_ALS);
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d enabling ALS mode\n", __func__,
+ ret);
+ return ret;
+ }
+
+ ret = isl29028_read_als_ir(chip, &als_ir_data);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * convert als data count to lux.
+ * if lux_scale = 125, lux = count * 0.031
+ * if lux_scale = 2000, lux = count * 0.49
+ */
+ if (chip->lux_scale == 125)
+ als_ir_data = (als_ir_data * 31) / 1000;
+ else
+ als_ir_data = (als_ir_data * 49) / 100;
+
+ *als_data = als_ir_data;
+
+ return 0;
+}
+
+static int isl29028_ir_get(struct isl29028_chip *chip, int *ir_data)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+
+ ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_IR);
+ if (ret < 0) {
+ dev_err(dev, "%s(): Error %d enabling IR mode\n", __func__,
+ ret);
+ return ret;
+ }
+
+ return isl29028_read_als_ir(chip, ir_data);
+}
+
+static int isl29028_set_pm_runtime_busy(struct isl29028_chip *chip, bool on)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+
+ if (on) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(dev);
+ } else {
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ }
+
+ return ret;
+}
+
+/* Channel IO */
+static int isl29028_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = -EINVAL;
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ if (mask != IIO_CHAN_INFO_SAMP_FREQ) {
+ dev_err(dev,
+ "%s(): proximity: Mask value 0x%08lx is not supported\n",
+ __func__, mask);
+ break;
+ }
+
+ if (val < 1 || val > 100) {
+ dev_err(dev,
+ "%s(): proximity: Sampling frequency %d is not in the range [1:100]\n",
+ __func__, val);
+ break;
+ }
+
+ ret = isl29028_set_proxim_sampling(chip, val, val2);
+ break;
+ case IIO_LIGHT:
+ if (mask != IIO_CHAN_INFO_SCALE) {
+ dev_err(dev,
+ "%s(): light: Mask value 0x%08lx is not supported\n",
+ __func__, mask);
+ break;
+ }
+
+ if (val != 125 && val != 2000) {
+ dev_err(dev,
+ "%s(): light: Lux scale %d is not in the set {125, 2000}\n",
+ __func__, val);
+ break;
+ }
+
+ ret = isl29028_set_als_scale(chip, val);
+ break;
+ default:
+ dev_err(dev, "%s(): Unsupported channel type %x\n",
+ __func__, chan->type);
+ break;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ if (ret < 0)
+ return ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, false);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+static int isl29028_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret, pm_ret;
+
+ ret = isl29028_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = -EINVAL;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = isl29028_als_get(chip, val);
+ break;
+ case IIO_INTENSITY:
+ ret = isl29028_ir_get(chip, val);
+ break;
+ case IIO_PROXIMITY:
+ ret = isl29028_read_proxim(chip, val);
+ break;
+ default:
+ break;
+ }
+
+ if (ret < 0)
+ break;
+
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ if (chan->type != IIO_PROXIMITY)
+ break;
+
+ *val = chip->prox_sampling_int;
+ *val2 = chip->prox_sampling_frac;
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type != IIO_LIGHT)
+ break;
+ *val = chip->lux_scale;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ dev_err(dev, "%s(): mask value 0x%08lx is not supported\n",
+ __func__, mask);
+ break;
+ }
+
+ mutex_unlock(&chip->lock);
+
+ if (ret < 0)
+ return ret;
+
+ /**
+ * Preserve the ret variable if the call to
+ * isl29028_set_pm_runtime_busy() is successful so the reading
+ * (if applicable) is returned to user space.
+ */
+ pm_ret = isl29028_set_pm_runtime_busy(chip, false);
+ if (pm_ret < 0)
+ return pm_ret;
+
+ return ret;
+}
+
+static IIO_CONST_ATTR(in_proximity_sampling_frequency_available,
+ "1.25 2.5 5 10 13.3 20 80 100");
+static IIO_CONST_ATTR(in_illuminance_scale_available, "125 2000");
+
+#define ISL29028_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr)
+static struct attribute *isl29028_attributes[] = {
+ ISL29028_CONST_ATTR(in_proximity_sampling_frequency_available),
+ ISL29028_CONST_ATTR(in_illuminance_scale_available),
+ NULL,
+};
+
+static const struct attribute_group isl29108_group = {
+ .attrs = isl29028_attributes,
+};
+
+static const struct iio_chan_spec isl29028_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_INTENSITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }, {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ }
+};
+
+static const struct iio_info isl29028_info = {
+ .attrs = &isl29108_group,
+ .read_raw = isl29028_read_raw,
+ .write_raw = isl29028_write_raw,
+};
+
+static int isl29028_clear_configure_reg(struct isl29028_chip *chip)
+{
+ struct device *dev = regmap_get_device(chip->regmap);
+ int ret;
+
+ ret = regmap_write(chip->regmap, ISL29028_REG_CONFIGURE, 0x0);
+ if (ret < 0)
+ dev_err(dev, "%s(): Error %d clearing the CONFIGURE register\n",
+ __func__, ret);
+
+ chip->als_ir_mode = ISL29028_MODE_NONE;
+ chip->enable_prox = false;
+
+ return ret;
+}
+
+static bool isl29028_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case ISL29028_REG_INTERRUPT:
+ case ISL29028_REG_PROX_DATA:
+ case ISL29028_REG_ALSIR_L:
+ case ISL29028_REG_ALSIR_U:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config isl29028_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = isl29028_is_volatile_reg,
+ .max_register = ISL29028_NUM_REGS - 1,
+ .num_reg_defaults_raw = ISL29028_NUM_REGS,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int isl29028_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct isl29028_chip *chip;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, indio_dev);
+ mutex_init(&chip->lock);
+
+ chip->regmap = devm_regmap_init_i2c(client, &isl29028_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ ret = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "%s: Error %d initializing regmap\n",
+ __func__, ret);
+ return ret;
+ }
+
+ chip->enable_prox = false;
+ chip->prox_sampling_int = 20;
+ chip->prox_sampling_frac = 0;
+ chip->lux_scale = 2000;
+
+ ret = regmap_write(chip->regmap, ISL29028_REG_TEST1_MODE, 0x0);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "%s(): Error %d writing to TEST1_MODE register\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = regmap_write(chip->regmap, ISL29028_REG_TEST2_MODE, 0x0);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "%s(): Error %d writing to TEST2_MODE register\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = isl29028_clear_configure_reg(chip);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->info = &isl29028_info;
+ indio_dev->channels = isl29028_channels;
+ indio_dev->num_channels = ARRAY_SIZE(isl29028_channels);
+ indio_dev->name = id->name;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ ISL29028_POWER_OFF_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev,
+ "%s(): iio registration failed with error %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int isl29028_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ return isl29028_clear_configure_reg(chip);
+}
+
+static int __maybe_unused isl29028_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct isl29028_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = isl29028_clear_configure_reg(chip);
+
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int __maybe_unused isl29028_resume(struct device *dev)
+{
+ /**
+ * The specific component (ALS/IR or proximity) will enable itself as
+ * needed the next time that the user requests a reading. This is done
+ * above in isl29028_set_als_ir_mode() and isl29028_enable_proximity().
+ */
+ return 0;
+}
+
+static const struct dev_pm_ops isl29028_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(isl29028_suspend, isl29028_resume, NULL)
+};
+
+static const struct i2c_device_id isl29028_id[] = {
+ {"isl29028", 0},
+ {"isl29030", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, isl29028_id);
+
+static const struct of_device_id isl29028_of_match[] = {
+ { .compatible = "isl,isl29028", }, /* for backward compat., don't use */
+ { .compatible = "isil,isl29028", },
+ { .compatible = "isil,isl29030", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, isl29028_of_match);
+
+static struct i2c_driver isl29028_driver = {
+ .driver = {
+ .name = "isl29028",
+ .pm = &isl29028_pm_ops,
+ .of_match_table = isl29028_of_match,
+ },
+ .probe = isl29028_probe,
+ .remove = isl29028_remove,
+ .id_table = isl29028_id,
+};
+
+module_i2c_driver(isl29028_driver);
+
+MODULE_DESCRIPTION("ISL29028 Ambient Light and Proximity Sensor driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
diff --git a/drivers/iio/light/isl29125.c b/drivers/iio/light/isl29125.c
new file mode 100644
index 0000000..ed38edc
--- /dev/null
+++ b/drivers/iio/light/isl29125.c
@@ -0,0 +1,358 @@
+/*
+ * isl29125.c - Support for Intersil ISL29125 RGB light sensor
+ *
+ * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * RGB light sensor with 16-bit channels for red, green, blue);
+ * 7-bit I2C slave address 0x44
+ *
+ * TODO: interrupt support, IR compensation, thresholds, 12bit
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define ISL29125_DRV_NAME "isl29125"
+
+#define ISL29125_DEVICE_ID 0x00
+#define ISL29125_CONF1 0x01
+#define ISL29125_CONF2 0x02
+#define ISL29125_CONF3 0x03
+#define ISL29125_STATUS 0x08
+#define ISL29125_GREEN_DATA 0x09
+#define ISL29125_RED_DATA 0x0b
+#define ISL29125_BLUE_DATA 0x0d
+
+#define ISL29125_ID 0x7d
+
+#define ISL29125_MODE_MASK GENMASK(2, 0)
+#define ISL29125_MODE_PD 0x0
+#define ISL29125_MODE_G 0x1
+#define ISL29125_MODE_R 0x2
+#define ISL29125_MODE_B 0x3
+#define ISL29125_MODE_RGB 0x5
+
+#define ISL29125_SENSING_RANGE_0 5722 /* 375 lux full range */
+#define ISL29125_SENSING_RANGE_1 152590 /* 10k lux full range */
+
+#define ISL29125_MODE_RANGE BIT(3)
+
+#define ISL29125_STATUS_CONV BIT(1)
+
+struct isl29125_data {
+ struct i2c_client *client;
+ u8 conf1;
+ u16 buffer[8]; /* 3x 16-bit, padding, 8 bytes timestamp */
+};
+
+#define ISL29125_CHANNEL(_color, _si) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+ .scan_index = _si, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+}
+
+static const struct iio_chan_spec isl29125_channels[] = {
+ ISL29125_CHANNEL(GREEN, 0),
+ ISL29125_CHANNEL(RED, 1),
+ ISL29125_CHANNEL(BLUE, 2),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct {
+ u8 mode, data;
+} isl29125_regs[] = {
+ {ISL29125_MODE_G, ISL29125_GREEN_DATA},
+ {ISL29125_MODE_R, ISL29125_RED_DATA},
+ {ISL29125_MODE_B, ISL29125_BLUE_DATA},
+};
+
+static int isl29125_read_data(struct isl29125_data *data, int si)
+{
+ int tries = 5;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1 | isl29125_regs[si].mode);
+ if (ret < 0)
+ return ret;
+
+ msleep(101);
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, ISL29125_STATUS);
+ if (ret < 0)
+ goto fail;
+ if (ret & ISL29125_STATUS_CONV)
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev, "data not ready\n");
+ ret = -EIO;
+ goto fail;
+ }
+
+ ret = i2c_smbus_read_word_data(data->client, isl29125_regs[si].data);
+
+fail:
+ i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, data->conf1);
+ return ret;
+}
+
+static int isl29125_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct isl29125_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = isl29125_read_data(data, chan->scan_index);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ if (data->conf1 & ISL29125_MODE_RANGE)
+ *val2 = ISL29125_SENSING_RANGE_1; /*10k lux full range*/
+ else
+ *val2 = ISL29125_SENSING_RANGE_0; /*375 lux full range*/
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int isl29125_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct isl29125_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ if (val != 0)
+ return -EINVAL;
+ if (val2 == ISL29125_SENSING_RANGE_1)
+ data->conf1 |= ISL29125_MODE_RANGE;
+ else if (val2 == ISL29125_SENSING_RANGE_0)
+ data->conf1 &= ~ISL29125_MODE_RANGE;
+ else
+ return -EINVAL;
+ return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1);
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t isl29125_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct isl29125_data *data = iio_priv(indio_dev);
+ int i, j = 0;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ int ret = i2c_smbus_read_word_data(data->client,
+ isl29125_regs[i].data);
+ if (ret < 0)
+ goto done;
+
+ data->buffer[j++] = ret;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static IIO_CONST_ATTR(scale_available, "0.005722 0.152590");
+
+static struct attribute *isl29125_attributes[] = {
+ &iio_const_attr_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group isl29125_attribute_group = {
+ .attrs = isl29125_attributes,
+};
+
+static const struct iio_info isl29125_info = {
+ .read_raw = isl29125_read_raw,
+ .write_raw = isl29125_write_raw,
+ .attrs = &isl29125_attribute_group,
+};
+
+static int isl29125_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct isl29125_data *data = iio_priv(indio_dev);
+
+ data->conf1 |= ISL29125_MODE_RGB;
+ return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1);
+}
+
+static int isl29125_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct isl29125_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = iio_triggered_buffer_predisable(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ data->conf1 &= ~ISL29125_MODE_MASK;
+ data->conf1 |= ISL29125_MODE_PD;
+ return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1);
+}
+
+static const struct iio_buffer_setup_ops isl29125_buffer_setup_ops = {
+ .preenable = isl29125_buffer_preenable,
+ .postenable = &iio_triggered_buffer_postenable,
+ .predisable = isl29125_buffer_predisable,
+};
+
+static int isl29125_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct isl29125_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &isl29125_info;
+ indio_dev->name = ISL29125_DRV_NAME;
+ indio_dev->channels = isl29125_channels;
+ indio_dev->num_channels = ARRAY_SIZE(isl29125_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = i2c_smbus_read_byte_data(data->client, ISL29125_DEVICE_ID);
+ if (ret < 0)
+ return ret;
+ if (ret != ISL29125_ID)
+ return -ENODEV;
+
+ data->conf1 = ISL29125_MODE_PD | ISL29125_MODE_RANGE;
+ ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, ISL29125_STATUS, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ isl29125_trigger_handler, &isl29125_buffer_setup_ops);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto buffer_cleanup;
+
+ return 0;
+
+buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int isl29125_powerdown(struct isl29125_data *data)
+{
+ return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ (data->conf1 & ~ISL29125_MODE_MASK) | ISL29125_MODE_PD);
+}
+
+static int isl29125_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ isl29125_powerdown(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int isl29125_suspend(struct device *dev)
+{
+ struct isl29125_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return isl29125_powerdown(data);
+}
+
+static int isl29125_resume(struct device *dev)
+{
+ struct isl29125_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+ data->conf1);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(isl29125_pm_ops, isl29125_suspend, isl29125_resume);
+
+static const struct i2c_device_id isl29125_id[] = {
+ { "isl29125", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, isl29125_id);
+
+static struct i2c_driver isl29125_driver = {
+ .driver = {
+ .name = ISL29125_DRV_NAME,
+ .pm = &isl29125_pm_ops,
+ },
+ .probe = isl29125_probe,
+ .remove = isl29125_remove,
+ .id_table = isl29125_id,
+};
+module_i2c_driver(isl29125_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("ISL29125 RGB light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/jsa1212.c b/drivers/iio/light/jsa1212.c
new file mode 100644
index 0000000..811505d
--- /dev/null
+++ b/drivers/iio/light/jsa1212.c
@@ -0,0 +1,466 @@
+/*
+ * JSA1212 Ambient Light & Proximity Sensor Driver
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * JSA1212 I2C slave address: 0x44(ADDR tied to GND), 0x45(ADDR tied to VDD)
+ *
+ * TODO: Interrupt support, thresholds, range support.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+/* JSA1212 reg address */
+#define JSA1212_CONF_REG 0x01
+#define JSA1212_INT_REG 0x02
+#define JSA1212_PXS_LT_REG 0x03
+#define JSA1212_PXS_HT_REG 0x04
+#define JSA1212_ALS_TH1_REG 0x05
+#define JSA1212_ALS_TH2_REG 0x06
+#define JSA1212_ALS_TH3_REG 0x07
+#define JSA1212_PXS_DATA_REG 0x08
+#define JSA1212_ALS_DT1_REG 0x09
+#define JSA1212_ALS_DT2_REG 0x0A
+#define JSA1212_ALS_RNG_REG 0x0B
+#define JSA1212_MAX_REG 0x0C
+
+/* JSA1212 reg masks */
+#define JSA1212_CONF_MASK 0xFF
+#define JSA1212_INT_MASK 0xFF
+#define JSA1212_PXS_LT_MASK 0xFF
+#define JSA1212_PXS_HT_MASK 0xFF
+#define JSA1212_ALS_TH1_MASK 0xFF
+#define JSA1212_ALS_TH2_LT_MASK 0x0F
+#define JSA1212_ALS_TH2_HT_MASK 0xF0
+#define JSA1212_ALS_TH3_MASK 0xFF
+#define JSA1212_PXS_DATA_MASK 0xFF
+#define JSA1212_ALS_DATA_MASK 0x0FFF
+#define JSA1212_ALS_DT1_MASK 0xFF
+#define JSA1212_ALS_DT2_MASK 0x0F
+#define JSA1212_ALS_RNG_MASK 0x07
+
+/* JSA1212 CONF REG bits */
+#define JSA1212_CONF_PXS_MASK 0x80
+#define JSA1212_CONF_PXS_ENABLE 0x80
+#define JSA1212_CONF_PXS_DISABLE 0x00
+#define JSA1212_CONF_ALS_MASK 0x04
+#define JSA1212_CONF_ALS_ENABLE 0x04
+#define JSA1212_CONF_ALS_DISABLE 0x00
+#define JSA1212_CONF_IRDR_MASK 0x08
+/* Proxmity sensing IRDR current sink settings */
+#define JSA1212_CONF_IRDR_200MA 0x08
+#define JSA1212_CONF_IRDR_100MA 0x00
+#define JSA1212_CONF_PXS_SLP_MASK 0x70
+#define JSA1212_CONF_PXS_SLP_0MS 0x70
+#define JSA1212_CONF_PXS_SLP_12MS 0x60
+#define JSA1212_CONF_PXS_SLP_50MS 0x50
+#define JSA1212_CONF_PXS_SLP_75MS 0x40
+#define JSA1212_CONF_PXS_SLP_100MS 0x30
+#define JSA1212_CONF_PXS_SLP_200MS 0x20
+#define JSA1212_CONF_PXS_SLP_400MS 0x10
+#define JSA1212_CONF_PXS_SLP_800MS 0x00
+
+/* JSA1212 INT REG bits */
+#define JSA1212_INT_CTRL_MASK 0x01
+#define JSA1212_INT_CTRL_EITHER 0x00
+#define JSA1212_INT_CTRL_BOTH 0x01
+#define JSA1212_INT_ALS_PRST_MASK 0x06
+#define JSA1212_INT_ALS_PRST_1CONV 0x00
+#define JSA1212_INT_ALS_PRST_4CONV 0x02
+#define JSA1212_INT_ALS_PRST_8CONV 0x04
+#define JSA1212_INT_ALS_PRST_16CONV 0x06
+#define JSA1212_INT_ALS_FLAG_MASK 0x08
+#define JSA1212_INT_ALS_FLAG_CLR 0x00
+#define JSA1212_INT_PXS_PRST_MASK 0x60
+#define JSA1212_INT_PXS_PRST_1CONV 0x00
+#define JSA1212_INT_PXS_PRST_4CONV 0x20
+#define JSA1212_INT_PXS_PRST_8CONV 0x40
+#define JSA1212_INT_PXS_PRST_16CONV 0x60
+#define JSA1212_INT_PXS_FLAG_MASK 0x80
+#define JSA1212_INT_PXS_FLAG_CLR 0x00
+
+/* JSA1212 ALS RNG REG bits */
+#define JSA1212_ALS_RNG_0_2048 0x00
+#define JSA1212_ALS_RNG_0_1024 0x01
+#define JSA1212_ALS_RNG_0_512 0x02
+#define JSA1212_ALS_RNG_0_256 0x03
+#define JSA1212_ALS_RNG_0_128 0x04
+
+/* JSA1212 INT threshold range */
+#define JSA1212_ALS_TH_MIN 0x0000
+#define JSA1212_ALS_TH_MAX 0x0FFF
+#define JSA1212_PXS_TH_MIN 0x00
+#define JSA1212_PXS_TH_MAX 0xFF
+
+#define JSA1212_ALS_DELAY_MS 200
+#define JSA1212_PXS_DELAY_MS 100
+
+#define JSA1212_DRIVER_NAME "jsa1212"
+#define JSA1212_REGMAP_NAME "jsa1212_regmap"
+
+enum jsa1212_op_mode {
+ JSA1212_OPMODE_ALS_EN,
+ JSA1212_OPMODE_PXS_EN,
+};
+
+struct jsa1212_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ u8 als_rng_idx;
+ bool als_en; /* ALS enable status */
+ bool pxs_en; /* proximity enable status */
+ struct regmap *regmap;
+};
+
+/* ALS range idx to val mapping */
+static const int jsa1212_als_range_val[] = {2048, 1024, 512, 256, 128,
+ 128, 128, 128};
+
+/* Enables or disables ALS function based on status */
+static int jsa1212_als_enable(struct jsa1212_data *data, u8 status)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
+ JSA1212_CONF_ALS_MASK,
+ status);
+ if (ret < 0)
+ return ret;
+
+ data->als_en = !!status;
+
+ return 0;
+}
+
+/* Enables or disables PXS function based on status */
+static int jsa1212_pxs_enable(struct jsa1212_data *data, u8 status)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
+ JSA1212_CONF_PXS_MASK,
+ status);
+ if (ret < 0)
+ return ret;
+
+ data->pxs_en = !!status;
+
+ return 0;
+}
+
+static int jsa1212_read_als_data(struct jsa1212_data *data,
+ unsigned int *val)
+{
+ int ret;
+ __le16 als_data;
+
+ ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ /* Delay for data output */
+ msleep(JSA1212_ALS_DELAY_MS);
+
+ /* Read 12 bit data */
+ ret = regmap_bulk_read(data->regmap, JSA1212_ALS_DT1_REG, &als_data, 2);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "als data read err\n");
+ goto als_data_read_err;
+ }
+
+ *val = le16_to_cpu(als_data);
+
+als_data_read_err:
+ return jsa1212_als_enable(data, JSA1212_CONF_ALS_DISABLE);
+}
+
+static int jsa1212_read_pxs_data(struct jsa1212_data *data,
+ unsigned int *val)
+{
+ int ret;
+ unsigned int pxs_data;
+
+ ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ /* Delay for data output */
+ msleep(JSA1212_PXS_DELAY_MS);
+
+ /* Read out all data */
+ ret = regmap_read(data->regmap, JSA1212_PXS_DATA_REG, &pxs_data);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "pxs data read err\n");
+ goto pxs_data_read_err;
+ }
+
+ *val = pxs_data & JSA1212_PXS_DATA_MASK;
+
+pxs_data_read_err:
+ return jsa1212_pxs_enable(data, JSA1212_CONF_PXS_DISABLE);
+}
+
+static int jsa1212_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+ struct jsa1212_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&data->lock);
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = jsa1212_read_als_data(data, val);
+ break;
+ case IIO_PROXIMITY:
+ ret = jsa1212_read_pxs_data(data, val);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ mutex_unlock(&data->lock);
+ return ret < 0 ? ret : IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ *val = jsa1212_als_range_val[data->als_rng_idx];
+ *val2 = BIT(12); /* Max 12 bit value */
+ return IIO_VAL_FRACTIONAL;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_chan_spec jsa1212_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }
+};
+
+static const struct iio_info jsa1212_info = {
+ .read_raw = &jsa1212_read_raw,
+};
+
+static int jsa1212_chip_init(struct jsa1212_data *data)
+{
+ int ret;
+
+ ret = regmap_write(data->regmap, JSA1212_CONF_REG,
+ (JSA1212_CONF_PXS_SLP_50MS |
+ JSA1212_CONF_IRDR_200MA));
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_write(data->regmap, JSA1212_INT_REG,
+ JSA1212_INT_ALS_PRST_4CONV);
+ if (ret < 0)
+ return ret;
+
+ data->als_rng_idx = JSA1212_ALS_RNG_0_2048;
+
+ return 0;
+}
+
+static bool jsa1212_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case JSA1212_PXS_DATA_REG:
+ case JSA1212_ALS_DT1_REG:
+ case JSA1212_ALS_DT2_REG:
+ case JSA1212_INT_REG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config jsa1212_regmap_config = {
+ .name = JSA1212_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = JSA1212_MAX_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = jsa1212_is_volatile_reg,
+};
+
+static int jsa1212_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct jsa1212_data *data;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ regmap = devm_regmap_init_i2c(client, &jsa1212_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Regmap initialization failed.\n");
+ return PTR_ERR(regmap);
+ }
+
+ data = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->regmap = regmap;
+
+ mutex_init(&data->lock);
+
+ ret = jsa1212_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = jsa1212_channels;
+ indio_dev->num_channels = ARRAY_SIZE(jsa1212_channels);
+ indio_dev->name = JSA1212_DRIVER_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ indio_dev->info = &jsa1212_info;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ dev_err(&client->dev, "%s: register device failed\n", __func__);
+
+ return ret;
+}
+
+ /* power off the device */
+static int jsa1212_power_off(struct jsa1212_data *data)
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+
+ ret = regmap_update_bits(data->regmap, JSA1212_CONF_REG,
+ JSA1212_CONF_ALS_MASK |
+ JSA1212_CONF_PXS_MASK,
+ JSA1212_CONF_ALS_DISABLE |
+ JSA1212_CONF_PXS_DISABLE);
+
+ if (ret < 0)
+ dev_err(&data->client->dev, "power off cmd failed\n");
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int jsa1212_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct jsa1212_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ return jsa1212_power_off(data);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int jsa1212_suspend(struct device *dev)
+{
+ struct jsa1212_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ return jsa1212_power_off(data);
+}
+
+static int jsa1212_resume(struct device *dev)
+{
+ int ret = 0;
+ struct jsa1212_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ mutex_lock(&data->lock);
+
+ if (data->als_en) {
+ ret = jsa1212_als_enable(data, JSA1212_CONF_ALS_ENABLE);
+ if (ret < 0) {
+ dev_err(dev, "als resume failed\n");
+ goto unlock_and_ret;
+ }
+ }
+
+ if (data->pxs_en) {
+ ret = jsa1212_pxs_enable(data, JSA1212_CONF_PXS_ENABLE);
+ if (ret < 0)
+ dev_err(dev, "pxs resume failed\n");
+ }
+
+unlock_and_ret:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(jsa1212_pm_ops, jsa1212_suspend, jsa1212_resume);
+
+#define JSA1212_PM_OPS (&jsa1212_pm_ops)
+#else
+#define JSA1212_PM_OPS NULL
+#endif
+
+static const struct acpi_device_id jsa1212_acpi_match[] = {
+ {"JSA1212", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, jsa1212_acpi_match);
+
+static const struct i2c_device_id jsa1212_id[] = {
+ { JSA1212_DRIVER_NAME, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, jsa1212_id);
+
+static struct i2c_driver jsa1212_driver = {
+ .driver = {
+ .name = JSA1212_DRIVER_NAME,
+ .pm = JSA1212_PM_OPS,
+ .acpi_match_table = ACPI_PTR(jsa1212_acpi_match),
+ },
+ .probe = jsa1212_probe,
+ .remove = jsa1212_remove,
+ .id_table = jsa1212_id,
+};
+module_i2c_driver(jsa1212_driver);
+
+MODULE_AUTHOR("Sathya Kuppuswamy <sathyanarayanan.kuppuswamy@linux.intel.com>");
+MODULE_DESCRIPTION("JSA1212 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
new file mode 100644
index 0000000..ff5a332
--- /dev/null
+++ b/drivers/iio/light/lm3533-als.c
@@ -0,0 +1,928 @@
+/*
+ * lm3533-als.c -- LM3533 Ambient Light Sensor driver
+ *
+ * Copyright (C) 2011-2012 Texas Instruments
+ *
+ * Author: Johan Hovold <jhovold@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/atomic.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include <linux/mfd/lm3533.h>
+
+
+#define LM3533_ALS_RESISTOR_MIN 1
+#define LM3533_ALS_RESISTOR_MAX 127
+#define LM3533_ALS_CHANNEL_CURRENT_MAX 2
+#define LM3533_ALS_THRESH_MAX 3
+#define LM3533_ALS_ZONE_MAX 4
+
+#define LM3533_REG_ALS_RESISTOR_SELECT 0x30
+#define LM3533_REG_ALS_CONF 0x31
+#define LM3533_REG_ALS_ZONE_INFO 0x34
+#define LM3533_REG_ALS_READ_ADC_RAW 0x37
+#define LM3533_REG_ALS_READ_ADC_AVERAGE 0x38
+#define LM3533_REG_ALS_BOUNDARY_BASE 0x50
+#define LM3533_REG_ALS_TARGET_BASE 0x60
+
+#define LM3533_ALS_ENABLE_MASK 0x01
+#define LM3533_ALS_INPUT_MODE_MASK 0x02
+#define LM3533_ALS_INT_ENABLE_MASK 0x01
+
+#define LM3533_ALS_ZONE_SHIFT 2
+#define LM3533_ALS_ZONE_MASK 0x1c
+
+#define LM3533_ALS_FLAG_INT_ENABLED 1
+
+
+struct lm3533_als {
+ struct lm3533 *lm3533;
+ struct platform_device *pdev;
+
+ unsigned long flags;
+ int irq;
+
+ atomic_t zone;
+ struct mutex thresh_mutex;
+};
+
+
+static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
+ int *adc)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ u8 val;
+ int ret;
+
+ if (average)
+ reg = LM3533_REG_ALS_READ_ADC_AVERAGE;
+ else
+ reg = LM3533_REG_ALS_READ_ADC_RAW;
+
+ ret = lm3533_read(als->lm3533, reg, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to read adc\n");
+ return ret;
+ }
+
+ *adc = val;
+
+ return 0;
+}
+
+static int _lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 val;
+ int ret;
+
+ ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to read zone\n");
+ return ret;
+ }
+
+ val = (val & LM3533_ALS_ZONE_MASK) >> LM3533_ALS_ZONE_SHIFT;
+ *zone = min_t(u8, val, LM3533_ALS_ZONE_MAX);
+
+ return 0;
+}
+
+static int lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ int ret;
+
+ if (test_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags)) {
+ *zone = atomic_read(&als->zone);
+ } else {
+ ret = _lm3533_als_get_zone(indio_dev, zone);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * channel output channel 0..2
+ * zone zone 0..4
+ */
+static inline u8 lm3533_als_get_target_reg(unsigned channel, unsigned zone)
+{
+ return LM3533_REG_ALS_TARGET_BASE + 5 * channel + zone;
+}
+
+static int lm3533_als_get_target(struct iio_dev *indio_dev, unsigned channel,
+ unsigned zone, u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (channel > LM3533_ALS_CHANNEL_CURRENT_MAX)
+ return -EINVAL;
+
+ if (zone > LM3533_ALS_ZONE_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_target_reg(channel, zone);
+ ret = lm3533_read(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to get target current\n");
+
+ return ret;
+}
+
+static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
+ unsigned zone, u8 val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (channel > LM3533_ALS_CHANNEL_CURRENT_MAX)
+ return -EINVAL;
+
+ if (zone > LM3533_ALS_ZONE_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_target_reg(channel, zone);
+ ret = lm3533_write(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to set target current\n");
+
+ return ret;
+}
+
+static int lm3533_als_get_current(struct iio_dev *indio_dev, unsigned channel,
+ int *val)
+{
+ u8 zone;
+ u8 target;
+ int ret;
+
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ ret = lm3533_als_get_target(indio_dev, channel, zone, &target);
+ if (ret)
+ return ret;
+
+ *val = target;
+
+ return 0;
+}
+
+static int lm3533_als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = lm3533_als_get_adc(indio_dev, false, val);
+ break;
+ case IIO_CURRENT:
+ ret = lm3533_als_get_current(indio_dev, chan->channel,
+ val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case IIO_CHAN_INFO_AVERAGE_RAW:
+ ret = lm3533_als_get_adc(indio_dev, true, val);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+#define CHANNEL_CURRENT(_channel) \
+ { \
+ .type = IIO_CURRENT, \
+ .channel = _channel, \
+ .indexed = true, \
+ .output = true, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ }
+
+static const struct iio_chan_spec lm3533_als_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .channel = 0,
+ .indexed = true,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_AVERAGE_RAW) |
+ BIT(IIO_CHAN_INFO_RAW),
+ },
+ CHANNEL_CURRENT(0),
+ CHANNEL_CURRENT(1),
+ CHANNEL_CURRENT(2),
+};
+
+static irqreturn_t lm3533_als_isr(int irq, void *dev_id)
+{
+
+ struct iio_dev *indio_dev = dev_id;
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 zone;
+ int ret;
+
+ /* Clear interrupt by reading the ALS zone register. */
+ ret = _lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ goto out;
+
+ atomic_set(&als->zone, zone);
+
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+out:
+ return IRQ_HANDLED;
+}
+
+static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ u8 val;
+ int ret;
+
+ if (enable)
+ val = mask;
+ else
+ val = 0;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, val, mask);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to set int mode %d\n",
+ enable);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_get_int_mode(struct iio_dev *indio_dev, int *enable)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ u8 val;
+ int ret;
+
+ ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to get int mode\n");
+ return ret;
+ }
+
+ *enable = !!(val & mask);
+
+ return 0;
+}
+
+static inline u8 lm3533_als_get_threshold_reg(unsigned nr, bool raising)
+{
+ u8 offset = !raising;
+
+ return LM3533_REG_ALS_BOUNDARY_BASE + 2 * nr + offset;
+}
+
+static int lm3533_als_get_threshold(struct iio_dev *indio_dev, unsigned nr,
+ bool raising, u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_threshold_reg(nr, raising);
+ ret = lm3533_read(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to get threshold\n");
+
+ return ret;
+}
+
+static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
+ bool raising, u8 val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 val2;
+ u8 reg, reg2;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_threshold_reg(nr, raising);
+ reg2 = lm3533_als_get_threshold_reg(nr, !raising);
+
+ mutex_lock(&als->thresh_mutex);
+ ret = lm3533_read(als->lm3533, reg2, &val2);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to get threshold\n");
+ goto out;
+ }
+ /*
+ * This device does not allow negative hysteresis (in fact, it uses
+ * whichever value is smaller as the lower bound) so we need to make
+ * sure that thresh_falling <= thresh_raising.
+ */
+ if ((raising && (val < val2)) || (!raising && (val > val2))) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = lm3533_write(als->lm3533, reg, val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to set threshold\n");
+ goto out;
+ }
+out:
+ mutex_unlock(&als->thresh_mutex);
+
+ return ret;
+}
+
+static int lm3533_als_get_hysteresis(struct iio_dev *indio_dev, unsigned nr,
+ u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 falling;
+ u8 raising;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ mutex_lock(&als->thresh_mutex);
+ ret = lm3533_als_get_threshold(indio_dev, nr, false, &falling);
+ if (ret)
+ goto out;
+ ret = lm3533_als_get_threshold(indio_dev, nr, true, &raising);
+ if (ret)
+ goto out;
+
+ *val = raising - falling;
+out:
+ mutex_unlock(&als->thresh_mutex);
+
+ return ret;
+}
+
+static ssize_t show_thresh_either_en(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+ int enable;
+ int ret;
+
+ if (als->irq) {
+ ret = lm3533_als_get_int_mode(indio_dev, &enable);
+ if (ret)
+ return ret;
+ } else {
+ enable = 0;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", enable);
+}
+
+static ssize_t store_thresh_either_en(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+ unsigned long enable;
+ bool int_enabled;
+ u8 zone;
+ int ret;
+
+ if (!als->irq)
+ return -EBUSY;
+
+ if (kstrtoul(buf, 0, &enable))
+ return -EINVAL;
+
+ int_enabled = test_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ if (enable && !int_enabled) {
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ atomic_set(&als->zone, zone);
+
+ set_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+ }
+
+ ret = lm3533_als_set_int_mode(indio_dev, enable);
+ if (ret) {
+ if (!int_enabled)
+ clear_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ return ret;
+ }
+
+ if (!enable)
+ clear_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ return len;
+}
+
+static ssize_t show_zone(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ u8 zone;
+ int ret;
+
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", zone);
+}
+
+enum lm3533_als_attribute_type {
+ LM3533_ATTR_TYPE_HYSTERESIS,
+ LM3533_ATTR_TYPE_TARGET,
+ LM3533_ATTR_TYPE_THRESH_FALLING,
+ LM3533_ATTR_TYPE_THRESH_RAISING,
+};
+
+struct lm3533_als_attribute {
+ struct device_attribute dev_attr;
+ enum lm3533_als_attribute_type type;
+ u8 val1;
+ u8 val2;
+};
+
+static inline struct lm3533_als_attribute *
+to_lm3533_als_attr(struct device_attribute *attr)
+{
+ return container_of(attr, struct lm3533_als_attribute, dev_attr);
+}
+
+static ssize_t show_als_attr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als_attribute *als_attr = to_lm3533_als_attr(attr);
+ u8 val;
+ int ret;
+
+ switch (als_attr->type) {
+ case LM3533_ATTR_TYPE_HYSTERESIS:
+ ret = lm3533_als_get_hysteresis(indio_dev, als_attr->val1,
+ &val);
+ break;
+ case LM3533_ATTR_TYPE_TARGET:
+ ret = lm3533_als_get_target(indio_dev, als_attr->val1,
+ als_attr->val2, &val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_FALLING:
+ ret = lm3533_als_get_threshold(indio_dev, als_attr->val1,
+ false, &val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_RAISING:
+ ret = lm3533_als_get_threshold(indio_dev, als_attr->val1,
+ true, &val);
+ break;
+ default:
+ ret = -ENXIO;
+ }
+
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static ssize_t store_als_attr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als_attribute *als_attr = to_lm3533_als_attr(attr);
+ u8 val;
+ int ret;
+
+ if (kstrtou8(buf, 0, &val))
+ return -EINVAL;
+
+ switch (als_attr->type) {
+ case LM3533_ATTR_TYPE_TARGET:
+ ret = lm3533_als_set_target(indio_dev, als_attr->val1,
+ als_attr->val2, val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_FALLING:
+ ret = lm3533_als_set_threshold(indio_dev, als_attr->val1,
+ false, val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_RAISING:
+ ret = lm3533_als_set_threshold(indio_dev, als_attr->val1,
+ true, val);
+ break;
+ default:
+ ret = -ENXIO;
+ }
+
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+#define ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2) \
+ { .dev_attr = __ATTR(_name, _mode, _show, _store), \
+ .type = _type, \
+ .val1 = _val1, \
+ .val2 = _val2 }
+
+#define LM3533_ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2) \
+ struct lm3533_als_attribute lm3533_als_attr_##_name = \
+ ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2)
+
+#define ALS_TARGET_ATTR_RW(_channel, _zone) \
+ LM3533_ALS_ATTR(out_current##_channel##_current##_zone##_raw, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_TARGET, _channel, _zone)
+/*
+ * ALS output current values (ALS mapper targets)
+ *
+ * out_current[0-2]_current[0-4]_raw 0-255
+ */
+static ALS_TARGET_ATTR_RW(0, 0);
+static ALS_TARGET_ATTR_RW(0, 1);
+static ALS_TARGET_ATTR_RW(0, 2);
+static ALS_TARGET_ATTR_RW(0, 3);
+static ALS_TARGET_ATTR_RW(0, 4);
+
+static ALS_TARGET_ATTR_RW(1, 0);
+static ALS_TARGET_ATTR_RW(1, 1);
+static ALS_TARGET_ATTR_RW(1, 2);
+static ALS_TARGET_ATTR_RW(1, 3);
+static ALS_TARGET_ATTR_RW(1, 4);
+
+static ALS_TARGET_ATTR_RW(2, 0);
+static ALS_TARGET_ATTR_RW(2, 1);
+static ALS_TARGET_ATTR_RW(2, 2);
+static ALS_TARGET_ATTR_RW(2, 3);
+static ALS_TARGET_ATTR_RW(2, 4);
+
+#define ALS_THRESH_FALLING_ATTR_RW(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_falling_value, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_THRESH_FALLING, _nr, 0)
+
+#define ALS_THRESH_RAISING_ATTR_RW(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_raising_value, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_THRESH_RAISING, _nr, 0)
+/*
+ * ALS Zone thresholds (boundaries)
+ *
+ * in_illuminance0_thresh[0-3]_falling_value 0-255
+ * in_illuminance0_thresh[0-3]_raising_value 0-255
+ */
+static ALS_THRESH_FALLING_ATTR_RW(0);
+static ALS_THRESH_FALLING_ATTR_RW(1);
+static ALS_THRESH_FALLING_ATTR_RW(2);
+static ALS_THRESH_FALLING_ATTR_RW(3);
+
+static ALS_THRESH_RAISING_ATTR_RW(0);
+static ALS_THRESH_RAISING_ATTR_RW(1);
+static ALS_THRESH_RAISING_ATTR_RW(2);
+static ALS_THRESH_RAISING_ATTR_RW(3);
+
+#define ALS_HYSTERESIS_ATTR_RO(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_hysteresis, \
+ S_IRUGO, show_als_attr, NULL, \
+ LM3533_ATTR_TYPE_HYSTERESIS, _nr, 0)
+/*
+ * ALS Zone threshold hysteresis
+ *
+ * threshY_hysteresis = threshY_raising - threshY_falling
+ *
+ * in_illuminance0_thresh[0-3]_hysteresis 0-255
+ * in_illuminance0_thresh[0-3]_hysteresis 0-255
+ */
+static ALS_HYSTERESIS_ATTR_RO(0);
+static ALS_HYSTERESIS_ATTR_RO(1);
+static ALS_HYSTERESIS_ATTR_RO(2);
+static ALS_HYSTERESIS_ATTR_RO(3);
+
+#define ILLUMINANCE_ATTR_RO(_name) \
+ DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO, show_##_name, NULL)
+#define ILLUMINANCE_ATTR_RW(_name) \
+ DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO | S_IWUSR, \
+ show_##_name, store_##_name)
+/*
+ * ALS Zone threshold-event enable
+ *
+ * in_illuminance0_thresh_either_en 0,1
+ */
+static ILLUMINANCE_ATTR_RW(thresh_either_en);
+
+/*
+ * ALS Current Zone
+ *
+ * in_illuminance0_zone 0-4
+ */
+static ILLUMINANCE_ATTR_RO(zone);
+
+static struct attribute *lm3533_als_event_attributes[] = {
+ &dev_attr_in_illuminance0_thresh_either_en.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_raising_value.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm3533_als_event_attribute_group = {
+ .attrs = lm3533_als_event_attributes
+};
+
+static struct attribute *lm3533_als_attributes[] = {
+ &dev_attr_in_illuminance0_zone.attr,
+ &lm3533_als_attr_out_current0_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current4_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current4_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current4_raw.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lm3533_als_attribute_group = {
+ .attrs = lm3533_als_attributes
+};
+
+static int lm3533_als_set_input_mode(struct lm3533_als *als, bool pwm_mode)
+{
+ u8 mask = LM3533_ALS_INPUT_MODE_MASK;
+ u8 val;
+ int ret;
+
+ if (pwm_mode)
+ val = mask; /* pwm input */
+ else
+ val = 0; /* analog input */
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, val, mask);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to set input mode %d\n",
+ pwm_mode);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_set_resistor(struct lm3533_als *als, u8 val)
+{
+ int ret;
+
+ if (val < LM3533_ALS_RESISTOR_MIN || val > LM3533_ALS_RESISTOR_MAX) {
+ dev_err(&als->pdev->dev, "invalid resistor value\n");
+ return -EINVAL;
+ };
+
+ ret = lm3533_write(als->lm3533, LM3533_REG_ALS_RESISTOR_SELECT, val);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to set resistor\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_setup(struct lm3533_als *als,
+ struct lm3533_als_platform_data *pdata)
+{
+ int ret;
+
+ ret = lm3533_als_set_input_mode(als, pdata->pwm_mode);
+ if (ret)
+ return ret;
+
+ /* ALS input is always high impedance in PWM-mode. */
+ if (!pdata->pwm_mode) {
+ ret = lm3533_als_set_resistor(als, pdata->r_select);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_setup_irq(struct lm3533_als *als, void *dev)
+{
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ int ret;
+
+ /* Make sure interrupts are disabled. */
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, 0, mask);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to disable interrupts\n");
+ return ret;
+ }
+
+ ret = request_threaded_irq(als->irq, NULL, lm3533_als_isr,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ dev_name(&als->pdev->dev), dev);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to request irq %d\n",
+ als->irq);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_enable(struct lm3533_als *als)
+{
+ u8 mask = LM3533_ALS_ENABLE_MASK;
+ int ret;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, mask, mask);
+ if (ret)
+ dev_err(&als->pdev->dev, "failed to enable ALS\n");
+
+ return ret;
+}
+
+static int lm3533_als_disable(struct lm3533_als *als)
+{
+ u8 mask = LM3533_ALS_ENABLE_MASK;
+ int ret;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, 0, mask);
+ if (ret)
+ dev_err(&als->pdev->dev, "failed to disable ALS\n");
+
+ return ret;
+}
+
+static const struct iio_info lm3533_als_info = {
+ .attrs = &lm3533_als_attribute_group,
+ .event_attrs = &lm3533_als_event_attribute_group,
+ .read_raw = &lm3533_als_read_raw,
+};
+
+static int lm3533_als_probe(struct platform_device *pdev)
+{
+ struct lm3533 *lm3533;
+ struct lm3533_als_platform_data *pdata;
+ struct lm3533_als *als;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ lm3533 = dev_get_drvdata(pdev->dev.parent);
+ if (!lm3533)
+ return -EINVAL;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*als));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ indio_dev->info = &lm3533_als_info;
+ indio_dev->channels = lm3533_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(lm3533_als_channels);
+ indio_dev->name = dev_name(&pdev->dev);
+ indio_dev->dev.parent = pdev->dev.parent;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ als = iio_priv(indio_dev);
+ als->lm3533 = lm3533;
+ als->pdev = pdev;
+ als->irq = lm3533->irq;
+ atomic_set(&als->zone, 0);
+ mutex_init(&als->thresh_mutex);
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ if (als->irq) {
+ ret = lm3533_als_setup_irq(als, indio_dev);
+ if (ret)
+ return ret;
+ }
+
+ ret = lm3533_als_setup(als, pdata);
+ if (ret)
+ goto err_free_irq;
+
+ ret = lm3533_als_enable(als);
+ if (ret)
+ goto err_free_irq;
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register ALS\n");
+ goto err_disable;
+ }
+
+ return 0;
+
+err_disable:
+ lm3533_als_disable(als);
+err_free_irq:
+ if (als->irq)
+ free_irq(als->irq, indio_dev);
+
+ return ret;
+}
+
+static int lm3533_als_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+
+ lm3533_als_set_int_mode(indio_dev, false);
+ iio_device_unregister(indio_dev);
+ lm3533_als_disable(als);
+ if (als->irq)
+ free_irq(als->irq, indio_dev);
+
+ return 0;
+}
+
+static struct platform_driver lm3533_als_driver = {
+ .driver = {
+ .name = "lm3533-als",
+ },
+ .probe = lm3533_als_probe,
+ .remove = lm3533_als_remove,
+};
+module_platform_driver(lm3533_als_driver);
+
+MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
+MODULE_DESCRIPTION("LM3533 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lm3533-als");
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
new file mode 100644
index 0000000..830a2d4
--- /dev/null
+++ b/drivers/iio/light/ltr501.c
@@ -0,0 +1,1592 @@
+/*
+ * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
+ *
+ * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * 7-bit I2C slave address 0x23
+ *
+ * TODO: IR LED characteristics
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+#include <linux/acpi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/events.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define LTR501_DRV_NAME "ltr501"
+
+#define LTR501_ALS_CONTR 0x80 /* ALS operation mode, SW reset */
+#define LTR501_PS_CONTR 0x81 /* PS operation mode */
+#define LTR501_PS_MEAS_RATE 0x84 /* measurement rate*/
+#define LTR501_ALS_MEAS_RATE 0x85 /* ALS integ time, measurement rate*/
+#define LTR501_PART_ID 0x86
+#define LTR501_MANUFAC_ID 0x87
+#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */
+#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */
+#define LTR501_ALS_PS_STATUS 0x8c
+#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */
+#define LTR501_INTR 0x8f /* output mode, polarity, mode */
+#define LTR501_PS_THRESH_UP 0x90 /* 11 bit, ps upper threshold */
+#define LTR501_PS_THRESH_LOW 0x92 /* 11 bit, ps lower threshold */
+#define LTR501_ALS_THRESH_UP 0x97 /* 16 bit, ALS upper threshold */
+#define LTR501_ALS_THRESH_LOW 0x99 /* 16 bit, ALS lower threshold */
+#define LTR501_INTR_PRST 0x9e /* ps thresh, als thresh */
+#define LTR501_MAX_REG 0x9f
+
+#define LTR501_ALS_CONTR_SW_RESET BIT(2)
+#define LTR501_CONTR_PS_GAIN_MASK (BIT(3) | BIT(2))
+#define LTR501_CONTR_PS_GAIN_SHIFT 2
+#define LTR501_CONTR_ALS_GAIN_MASK BIT(3)
+#define LTR501_CONTR_ACTIVE BIT(1)
+
+#define LTR501_STATUS_ALS_INTR BIT(3)
+#define LTR501_STATUS_ALS_RDY BIT(2)
+#define LTR501_STATUS_PS_INTR BIT(1)
+#define LTR501_STATUS_PS_RDY BIT(0)
+
+#define LTR501_PS_DATA_MASK 0x7ff
+#define LTR501_PS_THRESH_MASK 0x7ff
+#define LTR501_ALS_THRESH_MASK 0xffff
+
+#define LTR501_ALS_DEF_PERIOD 500000
+#define LTR501_PS_DEF_PERIOD 100000
+
+#define LTR501_REGMAP_NAME "ltr501_regmap"
+
+#define LTR501_LUX_CONV(vis_coeff, vis_data, ir_coeff, ir_data) \
+ ((vis_coeff * vis_data) - (ir_coeff * ir_data))
+
+static const int int_time_mapping[] = {100000, 50000, 200000, 400000};
+
+static const struct reg_field reg_field_it =
+ REG_FIELD(LTR501_ALS_MEAS_RATE, 3, 4);
+static const struct reg_field reg_field_als_intr =
+ REG_FIELD(LTR501_INTR, 1, 1);
+static const struct reg_field reg_field_ps_intr =
+ REG_FIELD(LTR501_INTR, 0, 0);
+static const struct reg_field reg_field_als_rate =
+ REG_FIELD(LTR501_ALS_MEAS_RATE, 0, 2);
+static const struct reg_field reg_field_ps_rate =
+ REG_FIELD(LTR501_PS_MEAS_RATE, 0, 3);
+static const struct reg_field reg_field_als_prst =
+ REG_FIELD(LTR501_INTR_PRST, 0, 3);
+static const struct reg_field reg_field_ps_prst =
+ REG_FIELD(LTR501_INTR_PRST, 4, 7);
+
+struct ltr501_samp_table {
+ int freq_val; /* repetition frequency in micro HZ*/
+ int time_val; /* repetition rate in micro seconds */
+};
+
+#define LTR501_RESERVED_GAIN -1
+
+enum {
+ ltr501 = 0,
+ ltr559,
+ ltr301,
+};
+
+struct ltr501_gain {
+ int scale;
+ int uscale;
+};
+
+static struct ltr501_gain ltr501_als_gain_tbl[] = {
+ {1, 0},
+ {0, 5000},
+};
+
+static struct ltr501_gain ltr559_als_gain_tbl[] = {
+ {1, 0},
+ {0, 500000},
+ {0, 250000},
+ {0, 125000},
+ {LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN},
+ {LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN},
+ {0, 20000},
+ {0, 10000},
+};
+
+static struct ltr501_gain ltr501_ps_gain_tbl[] = {
+ {1, 0},
+ {0, 250000},
+ {0, 125000},
+ {0, 62500},
+};
+
+static struct ltr501_gain ltr559_ps_gain_tbl[] = {
+ {0, 62500}, /* x16 gain */
+ {0, 31250}, /* x32 gain */
+ {0, 15625}, /* bits X1 are for x64 gain */
+ {0, 15624},
+};
+
+struct ltr501_chip_info {
+ u8 partid;
+ struct ltr501_gain *als_gain;
+ int als_gain_tbl_size;
+ struct ltr501_gain *ps_gain;
+ int ps_gain_tbl_size;
+ u8 als_mode_active;
+ u8 als_gain_mask;
+ u8 als_gain_shift;
+ struct iio_chan_spec const *channels;
+ const int no_channels;
+ const struct iio_info *info;
+ const struct iio_info *info_no_irq;
+};
+
+struct ltr501_data {
+ struct i2c_client *client;
+ struct mutex lock_als, lock_ps;
+ struct ltr501_chip_info *chip_info;
+ u8 als_contr, ps_contr;
+ int als_period, ps_period; /* period in micro seconds */
+ struct regmap *regmap;
+ struct regmap_field *reg_it;
+ struct regmap_field *reg_als_intr;
+ struct regmap_field *reg_ps_intr;
+ struct regmap_field *reg_als_rate;
+ struct regmap_field *reg_ps_rate;
+ struct regmap_field *reg_als_prst;
+ struct regmap_field *reg_ps_prst;
+};
+
+static const struct ltr501_samp_table ltr501_als_samp_table[] = {
+ {20000000, 50000}, {10000000, 100000},
+ {5000000, 200000}, {2000000, 500000},
+ {1000000, 1000000}, {500000, 2000000},
+ {500000, 2000000}, {500000, 2000000}
+};
+
+static const struct ltr501_samp_table ltr501_ps_samp_table[] = {
+ {20000000, 50000}, {14285714, 70000},
+ {10000000, 100000}, {5000000, 200000},
+ {2000000, 500000}, {1000000, 1000000},
+ {500000, 2000000}, {500000, 2000000},
+ {500000, 2000000}
+};
+
+static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab,
+ int len, int val, int val2)
+{
+ int i, freq;
+
+ freq = val * 1000000 + val2;
+
+ for (i = 0; i < len; i++) {
+ if (tab[i].freq_val == freq)
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_als_read_samp_freq(struct ltr501_data *data,
+ int *val, int *val2)
+{
+ int ret, i;
+
+ ret = regmap_field_read(data->reg_als_rate, &i);
+ if (ret < 0)
+ return ret;
+
+ if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table))
+ return -EINVAL;
+
+ *val = ltr501_als_samp_table[i].freq_val / 1000000;
+ *val2 = ltr501_als_samp_table[i].freq_val % 1000000;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int ltr501_ps_read_samp_freq(struct ltr501_data *data,
+ int *val, int *val2)
+{
+ int ret, i;
+
+ ret = regmap_field_read(data->reg_ps_rate, &i);
+ if (ret < 0)
+ return ret;
+
+ if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))
+ return -EINVAL;
+
+ *val = ltr501_ps_samp_table[i].freq_val / 1000000;
+ *val2 = ltr501_ps_samp_table[i].freq_val % 1000000;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int ltr501_als_write_samp_freq(struct ltr501_data *data,
+ int val, int val2)
+{
+ int i, ret;
+
+ i = ltr501_match_samp_freq(ltr501_als_samp_table,
+ ARRAY_SIZE(ltr501_als_samp_table),
+ val, val2);
+
+ if (i < 0)
+ return i;
+
+ mutex_lock(&data->lock_als);
+ ret = regmap_field_write(data->reg_als_rate, i);
+ mutex_unlock(&data->lock_als);
+
+ return ret;
+}
+
+static int ltr501_ps_write_samp_freq(struct ltr501_data *data,
+ int val, int val2)
+{
+ int i, ret;
+
+ i = ltr501_match_samp_freq(ltr501_ps_samp_table,
+ ARRAY_SIZE(ltr501_ps_samp_table),
+ val, val2);
+
+ if (i < 0)
+ return i;
+
+ mutex_lock(&data->lock_ps);
+ ret = regmap_field_write(data->reg_ps_rate, i);
+ mutex_unlock(&data->lock_ps);
+
+ return ret;
+}
+
+static int ltr501_als_read_samp_period(struct ltr501_data *data, int *val)
+{
+ int ret, i;
+
+ ret = regmap_field_read(data->reg_als_rate, &i);
+ if (ret < 0)
+ return ret;
+
+ if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table))
+ return -EINVAL;
+
+ *val = ltr501_als_samp_table[i].time_val;
+
+ return IIO_VAL_INT;
+}
+
+static int ltr501_ps_read_samp_period(struct ltr501_data *data, int *val)
+{
+ int ret, i;
+
+ ret = regmap_field_read(data->reg_ps_rate, &i);
+ if (ret < 0)
+ return ret;
+
+ if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table))
+ return -EINVAL;
+
+ *val = ltr501_ps_samp_table[i].time_val;
+
+ return IIO_VAL_INT;
+}
+
+/* IR and visible spectrum coeff's are given in data sheet */
+static unsigned long ltr501_calculate_lux(u16 vis_data, u16 ir_data)
+{
+ unsigned long ratio, lux;
+
+ if (vis_data == 0)
+ return 0;
+
+ /* multiply numerator by 100 to avoid handling ratio < 1 */
+ ratio = DIV_ROUND_UP(ir_data * 100, ir_data + vis_data);
+
+ if (ratio < 45)
+ lux = LTR501_LUX_CONV(1774, vis_data, -1105, ir_data);
+ else if (ratio >= 45 && ratio < 64)
+ lux = LTR501_LUX_CONV(3772, vis_data, 1336, ir_data);
+ else if (ratio >= 64 && ratio < 85)
+ lux = LTR501_LUX_CONV(1690, vis_data, 169, ir_data);
+ else
+ lux = 0;
+
+ return lux / 1000;
+}
+
+static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
+{
+ int tries = 100;
+ int ret, status;
+
+ while (tries--) {
+ ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status);
+ if (ret < 0)
+ return ret;
+ if ((status & drdy_mask) == drdy_mask)
+ return 0;
+ msleep(25);
+ }
+
+ dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n");
+ return -EIO;
+}
+
+static int ltr501_set_it_time(struct ltr501_data *data, int it)
+{
+ int ret, i, index = -1, status;
+
+ for (i = 0; i < ARRAY_SIZE(int_time_mapping); i++) {
+ if (int_time_mapping[i] == it) {
+ index = i;
+ break;
+ }
+ }
+ /* Make sure integ time index is valid */
+ if (index < 0)
+ return -EINVAL;
+
+ ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status);
+ if (ret < 0)
+ return ret;
+
+ if (status & LTR501_CONTR_ALS_GAIN_MASK) {
+ /*
+ * 200 ms and 400 ms integ time can only be
+ * used in dynamic range 1
+ */
+ if (index > 1)
+ return -EINVAL;
+ } else
+ /* 50 ms integ time can only be used in dynamic range 2 */
+ if (index == 1)
+ return -EINVAL;
+
+ return regmap_field_write(data->reg_it, index);
+}
+
+/* read int time in micro seconds */
+static int ltr501_read_it_time(struct ltr501_data *data, int *val, int *val2)
+{
+ int ret, index;
+
+ ret = regmap_field_read(data->reg_it, &index);
+ if (ret < 0)
+ return ret;
+
+ /* Make sure integ time index is valid */
+ if (index < 0 || index >= ARRAY_SIZE(int_time_mapping))
+ return -EINVAL;
+
+ *val2 = int_time_mapping[index];
+ *val = 0;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
+{
+ int ret;
+
+ ret = ltr501_drdy(data, LTR501_STATUS_ALS_RDY);
+ if (ret < 0)
+ return ret;
+ /* always read both ALS channels in given order */
+ return regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,
+ buf, 2 * sizeof(__le16));
+}
+
+static int ltr501_read_ps(struct ltr501_data *data)
+{
+ int ret, status;
+
+ ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,
+ &status, 2);
+ if (ret < 0)
+ return ret;
+
+ return status;
+}
+
+static int ltr501_read_intr_prst(struct ltr501_data *data,
+ enum iio_chan_type type,
+ int *val2)
+{
+ int ret, samp_period, prst;
+
+ switch (type) {
+ case IIO_INTENSITY:
+ ret = regmap_field_read(data->reg_als_prst, &prst);
+ if (ret < 0)
+ return ret;
+
+ ret = ltr501_als_read_samp_period(data, &samp_period);
+
+ if (ret < 0)
+ return ret;
+ *val2 = samp_period * prst;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PROXIMITY:
+ ret = regmap_field_read(data->reg_ps_prst, &prst);
+ if (ret < 0)
+ return ret;
+
+ ret = ltr501_ps_read_samp_period(data, &samp_period);
+
+ if (ret < 0)
+ return ret;
+
+ *val2 = samp_period * prst;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_write_intr_prst(struct ltr501_data *data,
+ enum iio_chan_type type,
+ int val, int val2)
+{
+ int ret, samp_period, new_val;
+ unsigned long period;
+
+ if (val < 0 || val2 < 0)
+ return -EINVAL;
+
+ /* period in microseconds */
+ period = ((val * 1000000) + val2);
+
+ switch (type) {
+ case IIO_INTENSITY:
+ ret = ltr501_als_read_samp_period(data, &samp_period);
+ if (ret < 0)
+ return ret;
+
+ /* period should be atleast equal to sampling period */
+ if (period < samp_period)
+ return -EINVAL;
+
+ new_val = DIV_ROUND_UP(period, samp_period);
+ if (new_val < 0 || new_val > 0x0f)
+ return -EINVAL;
+
+ mutex_lock(&data->lock_als);
+ ret = regmap_field_write(data->reg_als_prst, new_val);
+ mutex_unlock(&data->lock_als);
+ if (ret >= 0)
+ data->als_period = period;
+
+ return ret;
+ case IIO_PROXIMITY:
+ ret = ltr501_ps_read_samp_period(data, &samp_period);
+ if (ret < 0)
+ return ret;
+
+ /* period should be atleast equal to rate */
+ if (period < samp_period)
+ return -EINVAL;
+
+ new_val = DIV_ROUND_UP(period, samp_period);
+ if (new_val < 0 || new_val > 0x0f)
+ return -EINVAL;
+
+ mutex_lock(&data->lock_ps);
+ ret = regmap_field_write(data->reg_ps_prst, new_val);
+ mutex_unlock(&data->lock_ps);
+ if (ret >= 0)
+ data->ps_period = period;
+
+ return ret;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_event_spec ltr501_als_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD),
+ },
+
+};
+
+static const struct iio_event_spec ltr501_pxs_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD),
+ },
+};
+
+#define LTR501_INTENSITY_CHANNEL(_idx, _addr, _mod, _shared, \
+ _evspec, _evsize) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .address = (_addr), \
+ .channel2 = (_mod), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = (_shared), \
+ .scan_index = (_idx), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+ .event_spec = _evspec,\
+ .num_event_specs = _evsize,\
+}
+
+#define LTR501_LIGHT_CHANNEL() { \
+ .type = IIO_LIGHT, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+ .scan_index = -1, \
+}
+
+static const struct iio_chan_spec ltr501_channels[] = {
+ LTR501_LIGHT_CHANNEL(),
+ LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,
+ ltr501_als_event_spec,
+ ARRAY_SIZE(ltr501_als_event_spec)),
+ LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ NULL, 0),
+ {
+ .type = IIO_PROXIMITY,
+ .address = LTR501_PS_DATA,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .scan_index = 2,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 11,
+ .storagebits = 16,
+ .endianness = IIO_CPU,
+ },
+ .event_spec = ltr501_pxs_event_spec,
+ .num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_chan_spec ltr301_channels[] = {
+ LTR501_LIGHT_CHANNEL(),
+ LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,
+ ltr501_als_event_spec,
+ ARRAY_SIZE(ltr501_als_event_spec)),
+ LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ NULL, 0),
+ IIO_CHAN_SOFT_TIMESTAMP(2),
+};
+
+static int ltr501_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ __le16 buf[2];
+ int ret, i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ mutex_lock(&data->lock_als);
+ ret = ltr501_read_als(data, buf);
+ mutex_unlock(&data->lock_als);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+ *val = ltr501_calculate_lux(le16_to_cpu(buf[1]),
+ le16_to_cpu(buf[0]));
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ mutex_lock(&data->lock_als);
+ ret = ltr501_read_als(data, buf);
+ mutex_unlock(&data->lock_als);
+ if (ret < 0)
+ break;
+ *val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ?
+ buf[0] : buf[1]);
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_PROXIMITY:
+ mutex_lock(&data->lock_ps);
+ ret = ltr501_read_ps(data);
+ mutex_unlock(&data->lock_ps);
+ if (ret < 0)
+ break;
+ *val = ret & LTR501_PS_DATA_MASK;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ i = (data->als_contr & data->chip_info->als_gain_mask)
+ >> data->chip_info->als_gain_shift;
+ *val = data->chip_info->als_gain[i].scale;
+ *val2 = data->chip_info->als_gain[i].uscale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_PROXIMITY:
+ i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >>
+ LTR501_CONTR_PS_GAIN_SHIFT;
+ *val = data->chip_info->ps_gain[i].scale;
+ *val2 = data->chip_info->ps_gain[i].uscale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ return ltr501_read_it_time(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ return ltr501_als_read_samp_freq(data, val, val2);
+ case IIO_PROXIMITY:
+ return ltr501_ps_read_samp_freq(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+ }
+ return -EINVAL;
+}
+
+static int ltr501_get_gain_index(struct ltr501_gain *gain, int size,
+ int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ if (val == gain[i].scale && val2 == gain[i].uscale)
+ return i;
+
+ return -1;
+}
+
+static int ltr501_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int i, ret, freq_val, freq_val2;
+ struct ltr501_chip_info *info = data->chip_info;
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ i = ltr501_get_gain_index(info->als_gain,
+ info->als_gain_tbl_size,
+ val, val2);
+ if (i < 0) {
+ ret = -EINVAL;
+ break;
+ }
+
+ data->als_contr &= ~info->als_gain_mask;
+ data->als_contr |= i << info->als_gain_shift;
+
+ ret = regmap_write(data->regmap, LTR501_ALS_CONTR,
+ data->als_contr);
+ break;
+ case IIO_PROXIMITY:
+ i = ltr501_get_gain_index(info->ps_gain,
+ info->ps_gain_tbl_size,
+ val, val2);
+ if (i < 0) {
+ ret = -EINVAL;
+ break;
+ }
+ data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK;
+ data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT;
+
+ ret = regmap_write(data->regmap, LTR501_PS_CONTR,
+ data->ps_contr);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ if (val != 0) {
+ ret = -EINVAL;
+ break;
+ }
+ mutex_lock(&data->lock_als);
+ ret = ltr501_set_it_time(data, val2);
+ mutex_unlock(&data->lock_als);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ ret = ltr501_als_read_samp_freq(data, &freq_val,
+ &freq_val2);
+ if (ret < 0)
+ break;
+
+ ret = ltr501_als_write_samp_freq(data, val, val2);
+ if (ret < 0)
+ break;
+
+ /* update persistence count when changing frequency */
+ ret = ltr501_write_intr_prst(data, chan->type,
+ 0, data->als_period);
+
+ if (ret < 0)
+ ret = ltr501_als_write_samp_freq(data, freq_val,
+ freq_val2);
+ break;
+ case IIO_PROXIMITY:
+ ret = ltr501_ps_read_samp_freq(data, &freq_val,
+ &freq_val2);
+ if (ret < 0)
+ break;
+
+ ret = ltr501_ps_write_samp_freq(data, val, val2);
+ if (ret < 0)
+ break;
+
+ /* update persistence count when changing frequency */
+ ret = ltr501_write_intr_prst(data, chan->type,
+ 0, data->ps_period);
+
+ if (ret < 0)
+ ret = ltr501_ps_write_samp_freq(data, freq_val,
+ freq_val2);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+}
+
+static int ltr501_read_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int ret, thresh_data;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ ret = regmap_bulk_read(data->regmap,
+ LTR501_ALS_THRESH_UP,
+ &thresh_data, 2);
+ if (ret < 0)
+ return ret;
+ *val = thresh_data & LTR501_ALS_THRESH_MASK;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ ret = regmap_bulk_read(data->regmap,
+ LTR501_ALS_THRESH_LOW,
+ &thresh_data, 2);
+ if (ret < 0)
+ return ret;
+ *val = thresh_data & LTR501_ALS_THRESH_MASK;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_PROXIMITY:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ ret = regmap_bulk_read(data->regmap,
+ LTR501_PS_THRESH_UP,
+ &thresh_data, 2);
+ if (ret < 0)
+ return ret;
+ *val = thresh_data & LTR501_PS_THRESH_MASK;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ ret = regmap_bulk_read(data->regmap,
+ LTR501_PS_THRESH_LOW,
+ &thresh_data, 2);
+ if (ret < 0)
+ return ret;
+ *val = thresh_data & LTR501_PS_THRESH_MASK;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_write_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (val < 0)
+ return -EINVAL;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ if (val > LTR501_ALS_THRESH_MASK)
+ return -EINVAL;
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&data->lock_als);
+ ret = regmap_bulk_write(data->regmap,
+ LTR501_ALS_THRESH_UP,
+ &val, 2);
+ mutex_unlock(&data->lock_als);
+ return ret;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&data->lock_als);
+ ret = regmap_bulk_write(data->regmap,
+ LTR501_ALS_THRESH_LOW,
+ &val, 2);
+ mutex_unlock(&data->lock_als);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ case IIO_PROXIMITY:
+ if (val > LTR501_PS_THRESH_MASK)
+ return -EINVAL;
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&data->lock_ps);
+ ret = regmap_bulk_write(data->regmap,
+ LTR501_PS_THRESH_UP,
+ &val, 2);
+ mutex_unlock(&data->lock_ps);
+ return ret;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&data->lock_ps);
+ ret = regmap_bulk_write(data->regmap,
+ LTR501_PS_THRESH_LOW,
+ &val, 2);
+ mutex_unlock(&data->lock_ps);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ int ret;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ return ltr501_read_thresh(indio_dev, chan, type, dir,
+ info, val, val2);
+ case IIO_EV_INFO_PERIOD:
+ ret = ltr501_read_intr_prst(iio_priv(indio_dev),
+ chan->type, val2);
+ *val = *val2 / 1000000;
+ *val2 = *val2 % 1000000;
+ return ret;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (val2 != 0)
+ return -EINVAL;
+ return ltr501_write_thresh(indio_dev, chan, type, dir,
+ info, val, val2);
+ case IIO_EV_INFO_PERIOD:
+ return ltr501_write_intr_prst(iio_priv(indio_dev), chan->type,
+ val, val2);
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int ret, status;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ ret = regmap_field_read(data->reg_als_intr, &status);
+ if (ret < 0)
+ return ret;
+ return status;
+ case IIO_PROXIMITY:
+ ret = regmap_field_read(data->reg_ps_intr, &status);
+ if (ret < 0)
+ return ret;
+ return status;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int ltr501_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int ret;
+
+ /* only 1 and 0 are valid inputs */
+ if (state != 1 && state != 0)
+ return -EINVAL;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ mutex_lock(&data->lock_als);
+ ret = regmap_field_write(data->reg_als_intr, state);
+ mutex_unlock(&data->lock_als);
+ return ret;
+ case IIO_PROXIMITY:
+ mutex_lock(&data->lock_ps);
+ ret = regmap_field_write(data->reg_ps_intr, state);
+ mutex_unlock(&data->lock_ps);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t ltr501_show_proximity_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
+ struct ltr501_chip_info *info = data->chip_info;
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < info->ps_gain_tbl_size; i++) {
+ if (info->ps_gain[i].scale == LTR501_RESERVED_GAIN)
+ continue;
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+ info->ps_gain[i].scale,
+ info->ps_gain[i].uscale);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t ltr501_show_intensity_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev));
+ struct ltr501_chip_info *info = data->chip_info;
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < info->als_gain_tbl_size; i++) {
+ if (info->als_gain[i].scale == LTR501_RESERVED_GAIN)
+ continue;
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+ info->als_gain[i].scale,
+ info->als_gain[i].uscale);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.05 0.1 0.2 0.4");
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("20 10 5 2 1 0.5");
+
+static IIO_DEVICE_ATTR(in_proximity_scale_available, S_IRUGO,
+ ltr501_show_proximity_scale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_intensity_scale_available, S_IRUGO,
+ ltr501_show_intensity_scale_avail, NULL, 0);
+
+static struct attribute *ltr501_attributes[] = {
+ &iio_dev_attr_in_proximity_scale_available.dev_attr.attr,
+ &iio_dev_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static struct attribute *ltr301_attributes[] = {
+ &iio_dev_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group ltr501_attribute_group = {
+ .attrs = ltr501_attributes,
+};
+
+static const struct attribute_group ltr301_attribute_group = {
+ .attrs = ltr301_attributes,
+};
+
+static const struct iio_info ltr501_info_no_irq = {
+ .read_raw = ltr501_read_raw,
+ .write_raw = ltr501_write_raw,
+ .attrs = <r501_attribute_group,
+};
+
+static const struct iio_info ltr501_info = {
+ .read_raw = ltr501_read_raw,
+ .write_raw = ltr501_write_raw,
+ .attrs = <r501_attribute_group,
+ .read_event_value = <r501_read_event,
+ .write_event_value = <r501_write_event,
+ .read_event_config = <r501_read_event_config,
+ .write_event_config = <r501_write_event_config,
+};
+
+static const struct iio_info ltr301_info_no_irq = {
+ .read_raw = ltr501_read_raw,
+ .write_raw = ltr501_write_raw,
+ .attrs = <r301_attribute_group,
+};
+
+static const struct iio_info ltr301_info = {
+ .read_raw = ltr501_read_raw,
+ .write_raw = ltr501_write_raw,
+ .attrs = <r301_attribute_group,
+ .read_event_value = <r501_read_event,
+ .write_event_value = <r501_write_event,
+ .read_event_config = <r501_read_event_config,
+ .write_event_config = <r501_write_event_config,
+};
+
+static struct ltr501_chip_info ltr501_chip_info_tbl[] = {
+ [ltr501] = {
+ .partid = 0x08,
+ .als_gain = ltr501_als_gain_tbl,
+ .als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl),
+ .ps_gain = ltr501_ps_gain_tbl,
+ .ps_gain_tbl_size = ARRAY_SIZE(ltr501_ps_gain_tbl),
+ .als_mode_active = BIT(0) | BIT(1),
+ .als_gain_mask = BIT(3),
+ .als_gain_shift = 3,
+ .info = <r501_info,
+ .info_no_irq = <r501_info_no_irq,
+ .channels = ltr501_channels,
+ .no_channels = ARRAY_SIZE(ltr501_channels),
+ },
+ [ltr559] = {
+ .partid = 0x09,
+ .als_gain = ltr559_als_gain_tbl,
+ .als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl),
+ .ps_gain = ltr559_ps_gain_tbl,
+ .ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl),
+ .als_mode_active = BIT(1),
+ .als_gain_mask = BIT(2) | BIT(3) | BIT(4),
+ .als_gain_shift = 2,
+ .info = <r501_info,
+ .info_no_irq = <r501_info_no_irq,
+ .channels = ltr501_channels,
+ .no_channels = ARRAY_SIZE(ltr501_channels),
+ },
+ [ltr301] = {
+ .partid = 0x08,
+ .als_gain = ltr501_als_gain_tbl,
+ .als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl),
+ .als_mode_active = BIT(0) | BIT(1),
+ .als_gain_mask = BIT(3),
+ .als_gain_shift = 3,
+ .info = <r301_info,
+ .info_no_irq = <r301_info_no_irq,
+ .channels = ltr301_channels,
+ .no_channels = ARRAY_SIZE(ltr301_channels),
+ },
+};
+
+static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val)
+{
+ int ret;
+
+ ret = regmap_write(data->regmap, LTR501_ALS_CONTR, als_val);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write(data->regmap, LTR501_PS_CONTR, ps_val);
+}
+
+static irqreturn_t ltr501_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ltr501_data *data = iio_priv(indio_dev);
+ u16 buf[8];
+ __le16 als_buf[2];
+ u8 mask = 0;
+ int j = 0;
+ int ret, psdata;
+
+ memset(buf, 0, sizeof(buf));
+
+ /* figure out which data needs to be ready */
+ if (test_bit(0, indio_dev->active_scan_mask) ||
+ test_bit(1, indio_dev->active_scan_mask))
+ mask |= LTR501_STATUS_ALS_RDY;
+ if (test_bit(2, indio_dev->active_scan_mask))
+ mask |= LTR501_STATUS_PS_RDY;
+
+ ret = ltr501_drdy(data, mask);
+ if (ret < 0)
+ goto done;
+
+ if (mask & LTR501_STATUS_ALS_RDY) {
+ ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1,
+ (u8 *)als_buf, sizeof(als_buf));
+ if (ret < 0)
+ return ret;
+ if (test_bit(0, indio_dev->active_scan_mask))
+ buf[j++] = le16_to_cpu(als_buf[1]);
+ if (test_bit(1, indio_dev->active_scan_mask))
+ buf[j++] = le16_to_cpu(als_buf[0]);
+ }
+
+ if (mask & LTR501_STATUS_PS_RDY) {
+ ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA,
+ &psdata, 2);
+ if (ret < 0)
+ goto done;
+ buf[j++] = psdata & LTR501_PS_DATA_MASK;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buf,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t ltr501_interrupt_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int ret, status;
+
+ ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "irq read int reg failed\n");
+ return IRQ_HANDLED;
+ }
+
+ if (status & LTR501_STATUS_ALS_INTR)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+
+ if (status & LTR501_STATUS_PS_INTR)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+
+ return IRQ_HANDLED;
+}
+
+static int ltr501_init(struct ltr501_data *data)
+{
+ int ret, status;
+
+ ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status);
+ if (ret < 0)
+ return ret;
+
+ data->als_contr = status | data->chip_info->als_mode_active;
+
+ ret = regmap_read(data->regmap, LTR501_PS_CONTR, &status);
+ if (ret < 0)
+ return ret;
+
+ data->ps_contr = status | LTR501_CONTR_ACTIVE;
+
+ ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period);
+ if (ret < 0)
+ return ret;
+
+ ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period);
+ if (ret < 0)
+ return ret;
+
+ return ltr501_write_contr(data, data->als_contr, data->ps_contr);
+}
+
+static bool ltr501_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case LTR501_ALS_DATA1:
+ case LTR501_ALS_DATA0:
+ case LTR501_ALS_PS_STATUS:
+ case LTR501_PS_DATA:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct regmap_config ltr501_regmap_config = {
+ .name = LTR501_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = LTR501_MAX_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = ltr501_is_volatile_reg,
+};
+
+static int ltr501_powerdown(struct ltr501_data *data)
+{
+ return ltr501_write_contr(data, data->als_contr &
+ ~data->chip_info->als_mode_active,
+ data->ps_contr & ~LTR501_CONTR_ACTIVE);
+}
+
+static const char *ltr501_match_acpi_device(struct device *dev, int *chip_idx)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return NULL;
+ *chip_idx = id->driver_data;
+ return dev_name(dev);
+}
+
+static int ltr501_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ltr501_data *data;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int ret, partid, chip_idx = 0;
+ const char *name = NULL;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ regmap = devm_regmap_init_i2c(client, <r501_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Regmap initialization failed.\n");
+ return PTR_ERR(regmap);
+ }
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->regmap = regmap;
+ mutex_init(&data->lock_als);
+ mutex_init(&data->lock_ps);
+
+ data->reg_it = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_it);
+ if (IS_ERR(data->reg_it)) {
+ dev_err(&client->dev, "Integ time reg field init failed.\n");
+ return PTR_ERR(data->reg_it);
+ }
+
+ data->reg_als_intr = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_als_intr);
+ if (IS_ERR(data->reg_als_intr)) {
+ dev_err(&client->dev, "ALS intr mode reg field init failed\n");
+ return PTR_ERR(data->reg_als_intr);
+ }
+
+ data->reg_ps_intr = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_ps_intr);
+ if (IS_ERR(data->reg_ps_intr)) {
+ dev_err(&client->dev, "PS intr mode reg field init failed.\n");
+ return PTR_ERR(data->reg_ps_intr);
+ }
+
+ data->reg_als_rate = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_als_rate);
+ if (IS_ERR(data->reg_als_rate)) {
+ dev_err(&client->dev, "ALS samp rate field init failed.\n");
+ return PTR_ERR(data->reg_als_rate);
+ }
+
+ data->reg_ps_rate = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_ps_rate);
+ if (IS_ERR(data->reg_ps_rate)) {
+ dev_err(&client->dev, "PS samp rate field init failed.\n");
+ return PTR_ERR(data->reg_ps_rate);
+ }
+
+ data->reg_als_prst = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_als_prst);
+ if (IS_ERR(data->reg_als_prst)) {
+ dev_err(&client->dev, "ALS prst reg field init failed\n");
+ return PTR_ERR(data->reg_als_prst);
+ }
+
+ data->reg_ps_prst = devm_regmap_field_alloc(&client->dev, regmap,
+ reg_field_ps_prst);
+ if (IS_ERR(data->reg_ps_prst)) {
+ dev_err(&client->dev, "PS prst reg field init failed.\n");
+ return PTR_ERR(data->reg_ps_prst);
+ }
+
+ ret = regmap_read(data->regmap, LTR501_PART_ID, &partid);
+ if (ret < 0)
+ return ret;
+
+ if (id) {
+ name = id->name;
+ chip_idx = id->driver_data;
+ } else if (ACPI_HANDLE(&client->dev)) {
+ name = ltr501_match_acpi_device(&client->dev, &chip_idx);
+ } else {
+ return -ENODEV;
+ }
+
+ data->chip_info = <r501_chip_info_tbl[chip_idx];
+
+ if ((partid >> 4) != data->chip_info->partid)
+ return -ENODEV;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = data->chip_info->info;
+ indio_dev->channels = data->chip_info->channels;
+ indio_dev->num_channels = data->chip_info->no_channels;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = ltr501_init(data);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq > 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL, ltr501_interrupt_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "ltr501_thresh_event",
+ indio_dev);
+ if (ret) {
+ dev_err(&client->dev, "request irq (%d) failed\n",
+ client->irq);
+ return ret;
+ }
+ } else {
+ indio_dev->info = data->chip_info->info_no_irq;
+ }
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ ltr501_trigger_handler, NULL);
+ if (ret)
+ goto powerdown_on_error;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_unreg_buffer;
+
+ return 0;
+
+error_unreg_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+powerdown_on_error:
+ ltr501_powerdown(data);
+ return ret;
+}
+
+static int ltr501_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ ltr501_powerdown(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ltr501_suspend(struct device *dev)
+{
+ struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return ltr501_powerdown(data);
+}
+
+static int ltr501_resume(struct device *dev)
+{
+ struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return ltr501_write_contr(data, data->als_contr,
+ data->ps_contr);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
+
+static const struct acpi_device_id ltr_acpi_match[] = {
+ {"LTER0501", ltr501},
+ {"LTER0559", ltr559},
+ {"LTER0301", ltr301},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, ltr_acpi_match);
+
+static const struct i2c_device_id ltr501_id[] = {
+ { "ltr501", ltr501},
+ { "ltr559", ltr559},
+ { "ltr301", ltr301},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ltr501_id);
+
+static struct i2c_driver ltr501_driver = {
+ .driver = {
+ .name = LTR501_DRV_NAME,
+ .pm = <r501_pm_ops,
+ .acpi_match_table = ACPI_PTR(ltr_acpi_match),
+ },
+ .probe = ltr501_probe,
+ .remove = ltr501_remove,
+ .id_table = ltr501_id,
+};
+
+module_i2c_driver(ltr501_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/lv0104cs.c b/drivers/iio/light/lv0104cs.c
new file mode 100644
index 0000000..55b8e28
--- /dev/null
+++ b/drivers/iio/light/lv0104cs.c
@@ -0,0 +1,531 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * lv0104cs.c: LV0104CS Ambient Light Sensor Driver
+ *
+ * Copyright (C) 2018
+ * Author: Jeff LaBundy <jeff@labundy.com>
+ *
+ * 7-bit I2C slave address: 0x13
+ *
+ * Link to data sheet: http://www.onsemi.com/pub/Collateral/LV0104CS-D.PDF
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define LV0104CS_REGVAL_MEASURE 0xE0
+#define LV0104CS_REGVAL_SLEEP 0x00
+
+#define LV0104CS_SCALE_0_25X 0
+#define LV0104CS_SCALE_1X 1
+#define LV0104CS_SCALE_2X 2
+#define LV0104CS_SCALE_8X 3
+#define LV0104CS_SCALE_SHIFT 3
+
+#define LV0104CS_INTEG_12_5MS 0
+#define LV0104CS_INTEG_100MS 1
+#define LV0104CS_INTEG_200MS 2
+#define LV0104CS_INTEG_SHIFT 1
+
+#define LV0104CS_CALIBSCALE_UNITY 31
+
+struct lv0104cs_private {
+ struct i2c_client *client;
+ struct mutex lock;
+ u8 calibscale;
+ u8 scale;
+ u8 int_time;
+};
+
+struct lv0104cs_mapping {
+ int val;
+ int val2;
+ u8 regval;
+};
+
+static const struct lv0104cs_mapping lv0104cs_calibscales[] = {
+ { 0, 666666, 0x81 },
+ { 0, 800000, 0x82 },
+ { 0, 857142, 0x83 },
+ { 0, 888888, 0x84 },
+ { 0, 909090, 0x85 },
+ { 0, 923076, 0x86 },
+ { 0, 933333, 0x87 },
+ { 0, 941176, 0x88 },
+ { 0, 947368, 0x89 },
+ { 0, 952380, 0x8A },
+ { 0, 956521, 0x8B },
+ { 0, 960000, 0x8C },
+ { 0, 962962, 0x8D },
+ { 0, 965517, 0x8E },
+ { 0, 967741, 0x8F },
+ { 0, 969696, 0x90 },
+ { 0, 971428, 0x91 },
+ { 0, 972972, 0x92 },
+ { 0, 974358, 0x93 },
+ { 0, 975609, 0x94 },
+ { 0, 976744, 0x95 },
+ { 0, 977777, 0x96 },
+ { 0, 978723, 0x97 },
+ { 0, 979591, 0x98 },
+ { 0, 980392, 0x99 },
+ { 0, 981132, 0x9A },
+ { 0, 981818, 0x9B },
+ { 0, 982456, 0x9C },
+ { 0, 983050, 0x9D },
+ { 0, 983606, 0x9E },
+ { 0, 984126, 0x9F },
+ { 1, 0, 0x80 },
+ { 1, 16129, 0xBF },
+ { 1, 16666, 0xBE },
+ { 1, 17241, 0xBD },
+ { 1, 17857, 0xBC },
+ { 1, 18518, 0xBB },
+ { 1, 19230, 0xBA },
+ { 1, 20000, 0xB9 },
+ { 1, 20833, 0xB8 },
+ { 1, 21739, 0xB7 },
+ { 1, 22727, 0xB6 },
+ { 1, 23809, 0xB5 },
+ { 1, 24999, 0xB4 },
+ { 1, 26315, 0xB3 },
+ { 1, 27777, 0xB2 },
+ { 1, 29411, 0xB1 },
+ { 1, 31250, 0xB0 },
+ { 1, 33333, 0xAF },
+ { 1, 35714, 0xAE },
+ { 1, 38461, 0xAD },
+ { 1, 41666, 0xAC },
+ { 1, 45454, 0xAB },
+ { 1, 50000, 0xAA },
+ { 1, 55555, 0xA9 },
+ { 1, 62500, 0xA8 },
+ { 1, 71428, 0xA7 },
+ { 1, 83333, 0xA6 },
+ { 1, 100000, 0xA5 },
+ { 1, 125000, 0xA4 },
+ { 1, 166666, 0xA3 },
+ { 1, 250000, 0xA2 },
+ { 1, 500000, 0xA1 },
+};
+
+static const struct lv0104cs_mapping lv0104cs_scales[] = {
+ { 0, 250000, LV0104CS_SCALE_0_25X << LV0104CS_SCALE_SHIFT },
+ { 1, 0, LV0104CS_SCALE_1X << LV0104CS_SCALE_SHIFT },
+ { 2, 0, LV0104CS_SCALE_2X << LV0104CS_SCALE_SHIFT },
+ { 8, 0, LV0104CS_SCALE_8X << LV0104CS_SCALE_SHIFT },
+};
+
+static const struct lv0104cs_mapping lv0104cs_int_times[] = {
+ { 0, 12500, LV0104CS_INTEG_12_5MS << LV0104CS_INTEG_SHIFT },
+ { 0, 100000, LV0104CS_INTEG_100MS << LV0104CS_INTEG_SHIFT },
+ { 0, 200000, LV0104CS_INTEG_200MS << LV0104CS_INTEG_SHIFT },
+};
+
+static int lv0104cs_write_reg(struct i2c_client *client, u8 regval)
+{
+ int ret;
+
+ ret = i2c_master_send(client, (char *)®val, sizeof(regval));
+ if (ret < 0)
+ return ret;
+ if (ret != sizeof(regval))
+ return -EIO;
+
+ return 0;
+}
+
+static int lv0104cs_read_adc(struct i2c_client *client, u16 *adc_output)
+{
+ __be16 regval;
+ int ret;
+
+ ret = i2c_master_recv(client, (char *)®val, sizeof(regval));
+ if (ret < 0)
+ return ret;
+ if (ret != sizeof(regval))
+ return -EIO;
+
+ *adc_output = be16_to_cpu(regval);
+
+ return 0;
+}
+
+static int lv0104cs_get_lux(struct lv0104cs_private *lv0104cs,
+ int *val, int *val2)
+{
+ u8 regval = LV0104CS_REGVAL_MEASURE;
+ u16 adc_output;
+ int ret;
+
+ regval |= lv0104cs_scales[lv0104cs->scale].regval;
+ regval |= lv0104cs_int_times[lv0104cs->int_time].regval;
+ ret = lv0104cs_write_reg(lv0104cs->client, regval);
+ if (ret)
+ return ret;
+
+ /* wait for integration time to pass (with margin) */
+ switch (lv0104cs->int_time) {
+ case LV0104CS_INTEG_12_5MS:
+ msleep(50);
+ break;
+
+ case LV0104CS_INTEG_100MS:
+ msleep(150);
+ break;
+
+ case LV0104CS_INTEG_200MS:
+ msleep(250);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ ret = lv0104cs_read_adc(lv0104cs->client, &adc_output);
+ if (ret)
+ return ret;
+
+ ret = lv0104cs_write_reg(lv0104cs->client, LV0104CS_REGVAL_SLEEP);
+ if (ret)
+ return ret;
+
+ /* convert ADC output to lux */
+ switch (lv0104cs->scale) {
+ case LV0104CS_SCALE_0_25X:
+ *val = adc_output * 4;
+ *val2 = 0;
+ return 0;
+
+ case LV0104CS_SCALE_1X:
+ *val = adc_output;
+ *val2 = 0;
+ return 0;
+
+ case LV0104CS_SCALE_2X:
+ *val = adc_output / 2;
+ *val2 = (adc_output % 2) * 500000;
+ return 0;
+
+ case LV0104CS_SCALE_8X:
+ *val = adc_output / 8;
+ *val2 = (adc_output % 8) * 125000;
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int lv0104cs_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct lv0104cs_private *lv0104cs = iio_priv(indio_dev);
+ int ret;
+
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ mutex_lock(&lv0104cs->lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = lv0104cs_get_lux(lv0104cs, val, val2);
+ if (ret)
+ goto err_mutex;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+
+ case IIO_CHAN_INFO_CALIBSCALE:
+ *val = lv0104cs_calibscales[lv0104cs->calibscale].val;
+ *val2 = lv0104cs_calibscales[lv0104cs->calibscale].val2;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+
+ case IIO_CHAN_INFO_SCALE:
+ *val = lv0104cs_scales[lv0104cs->scale].val;
+ *val2 = lv0104cs_scales[lv0104cs->scale].val2;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = lv0104cs_int_times[lv0104cs->int_time].val;
+ *val2 = lv0104cs_int_times[lv0104cs->int_time].val2;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+err_mutex:
+ mutex_unlock(&lv0104cs->lock);
+
+ return ret;
+}
+
+static int lv0104cs_set_calibscale(struct lv0104cs_private *lv0104cs,
+ int val, int val2)
+{
+ int calibscale = val * 1000000 + val2;
+ int floor, ceil, mid;
+ int ret, i, index;
+
+ /* round to nearest quantized calibscale (sensitivity) */
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_calibscales) - 1; i++) {
+ floor = lv0104cs_calibscales[i].val * 1000000
+ + lv0104cs_calibscales[i].val2;
+ ceil = lv0104cs_calibscales[i + 1].val * 1000000
+ + lv0104cs_calibscales[i + 1].val2;
+ mid = (floor + ceil) / 2;
+
+ /* round down */
+ if (calibscale >= floor && calibscale < mid) {
+ index = i;
+ break;
+ }
+
+ /* round up */
+ if (calibscale >= mid && calibscale <= ceil) {
+ index = i + 1;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(lv0104cs_calibscales) - 1)
+ return -EINVAL;
+
+ mutex_lock(&lv0104cs->lock);
+
+ /* set calibscale (sensitivity) */
+ ret = lv0104cs_write_reg(lv0104cs->client,
+ lv0104cs_calibscales[index].regval);
+ if (ret)
+ goto err_mutex;
+
+ lv0104cs->calibscale = index;
+
+err_mutex:
+ mutex_unlock(&lv0104cs->lock);
+
+ return ret;
+}
+
+static int lv0104cs_set_scale(struct lv0104cs_private *lv0104cs,
+ int val, int val2)
+{
+ int i;
+
+ /* hard matching */
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_scales); i++) {
+ if (val != lv0104cs_scales[i].val)
+ continue;
+
+ if (val2 == lv0104cs_scales[i].val2)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(lv0104cs_scales))
+ return -EINVAL;
+
+ mutex_lock(&lv0104cs->lock);
+ lv0104cs->scale = i;
+ mutex_unlock(&lv0104cs->lock);
+
+ return 0;
+}
+
+static int lv0104cs_set_int_time(struct lv0104cs_private *lv0104cs,
+ int val, int val2)
+{
+ int i;
+
+ /* hard matching */
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_int_times); i++) {
+ if (val != lv0104cs_int_times[i].val)
+ continue;
+
+ if (val2 == lv0104cs_int_times[i].val2)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(lv0104cs_int_times))
+ return -EINVAL;
+
+ mutex_lock(&lv0104cs->lock);
+ lv0104cs->int_time = i;
+ mutex_unlock(&lv0104cs->lock);
+
+ return 0;
+}
+
+static int lv0104cs_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct lv0104cs_private *lv0104cs = iio_priv(indio_dev);
+
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ return lv0104cs_set_calibscale(lv0104cs, val, val2);
+
+ case IIO_CHAN_INFO_SCALE:
+ return lv0104cs_set_scale(lv0104cs, val, val2);
+
+ case IIO_CHAN_INFO_INT_TIME:
+ return lv0104cs_set_int_time(lv0104cs, val, val2);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t lv0104cs_show_calibscale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_calibscales); i++) {
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+ lv0104cs_calibscales[i].val,
+ lv0104cs_calibscales[i].val2);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t lv0104cs_show_scale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_scales); i++) {
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+ lv0104cs_scales[i].val,
+ lv0104cs_scales[i].val2);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t lv0104cs_show_int_time_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lv0104cs_int_times); i++) {
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ",
+ lv0104cs_int_times[i].val,
+ lv0104cs_int_times[i].val2);
+ }
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEVICE_ATTR(calibscale_available, 0444,
+ lv0104cs_show_calibscale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(scale_available, 0444,
+ lv0104cs_show_scale_avail, NULL, 0);
+static IIO_DEV_ATTR_INT_TIME_AVAIL(lv0104cs_show_int_time_avail);
+
+static struct attribute *lv0104cs_attributes[] = {
+ &iio_dev_attr_calibscale_available.dev_attr.attr,
+ &iio_dev_attr_scale_available.dev_attr.attr,
+ &iio_dev_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group lv0104cs_attribute_group = {
+ .attrs = lv0104cs_attributes,
+};
+
+static const struct iio_info lv0104cs_info = {
+ .attrs = &lv0104cs_attribute_group,
+ .read_raw = &lv0104cs_read_raw,
+ .write_raw = &lv0104cs_write_raw,
+};
+
+static const struct iio_chan_spec lv0104cs_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+};
+
+static int lv0104cs_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct lv0104cs_private *lv0104cs;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*lv0104cs));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ lv0104cs = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, lv0104cs);
+ lv0104cs->client = client;
+
+ mutex_init(&lv0104cs->lock);
+
+ lv0104cs->calibscale = LV0104CS_CALIBSCALE_UNITY;
+ lv0104cs->scale = LV0104CS_SCALE_1X;
+ lv0104cs->int_time = LV0104CS_INTEG_200MS;
+
+ ret = lv0104cs_write_reg(lv0104cs->client,
+ lv0104cs_calibscales[LV0104CS_CALIBSCALE_UNITY].regval);
+ if (ret)
+ return ret;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = lv0104cs_channels;
+ indio_dev->num_channels = ARRAY_SIZE(lv0104cs_channels);
+ indio_dev->name = client->name;
+ indio_dev->info = &lv0104cs_info;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id lv0104cs_id[] = {
+ { "lv0104cs", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lv0104cs_id);
+
+static struct i2c_driver lv0104cs_i2c_driver = {
+ .driver = {
+ .name = "lv0104cs",
+ },
+ .id_table = lv0104cs_id,
+ .probe = lv0104cs_probe,
+};
+module_i2c_driver(lv0104cs_i2c_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("LV0104CS Ambient Light Sensor Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/max44000.c b/drivers/iio/light/max44000.c
new file mode 100644
index 0000000..bcdb0eb
--- /dev/null
+++ b/drivers/iio/light/max44000.c
@@ -0,0 +1,639 @@
+/*
+ * MAX44000 Ambient and Infrared Proximity Sensor
+ *
+ * Copyright (c) 2016, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Data sheet: https://datasheets.maximintegrated.com/en/ds/MAX44000.pdf
+ *
+ * 7-bit I2C slave address 0x4a
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/util_macros.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/acpi.h>
+
+#define MAX44000_DRV_NAME "max44000"
+
+/* Registers in datasheet order */
+#define MAX44000_REG_STATUS 0x00
+#define MAX44000_REG_CFG_MAIN 0x01
+#define MAX44000_REG_CFG_RX 0x02
+#define MAX44000_REG_CFG_TX 0x03
+#define MAX44000_REG_ALS_DATA_HI 0x04
+#define MAX44000_REG_ALS_DATA_LO 0x05
+#define MAX44000_REG_PRX_DATA 0x16
+#define MAX44000_REG_ALS_UPTHR_HI 0x06
+#define MAX44000_REG_ALS_UPTHR_LO 0x07
+#define MAX44000_REG_ALS_LOTHR_HI 0x08
+#define MAX44000_REG_ALS_LOTHR_LO 0x09
+#define MAX44000_REG_PST 0x0a
+#define MAX44000_REG_PRX_IND 0x0b
+#define MAX44000_REG_PRX_THR 0x0c
+#define MAX44000_REG_TRIM_GAIN_GREEN 0x0f
+#define MAX44000_REG_TRIM_GAIN_IR 0x10
+
+/* REG_CFG bits */
+#define MAX44000_CFG_ALSINTE 0x01
+#define MAX44000_CFG_PRXINTE 0x02
+#define MAX44000_CFG_MASK 0x1c
+#define MAX44000_CFG_MODE_SHUTDOWN 0x00
+#define MAX44000_CFG_MODE_ALS_GIR 0x04
+#define MAX44000_CFG_MODE_ALS_G 0x08
+#define MAX44000_CFG_MODE_ALS_IR 0x0c
+#define MAX44000_CFG_MODE_ALS_PRX 0x10
+#define MAX44000_CFG_MODE_PRX 0x14
+#define MAX44000_CFG_TRIM 0x20
+
+/*
+ * Upper 4 bits are not documented but start as 1 on powerup
+ * Setting them to 0 causes proximity to misbehave so set them to 1
+ */
+#define MAX44000_REG_CFG_RX_DEFAULT 0xf0
+
+/* REG_RX bits */
+#define MAX44000_CFG_RX_ALSTIM_MASK 0x0c
+#define MAX44000_CFG_RX_ALSTIM_SHIFT 2
+#define MAX44000_CFG_RX_ALSPGA_MASK 0x03
+#define MAX44000_CFG_RX_ALSPGA_SHIFT 0
+
+/* REG_TX bits */
+#define MAX44000_LED_CURRENT_MASK 0xf
+#define MAX44000_LED_CURRENT_MAX 11
+#define MAX44000_LED_CURRENT_DEFAULT 6
+
+#define MAX44000_ALSDATA_OVERFLOW 0x4000
+
+struct max44000_data {
+ struct mutex lock;
+ struct regmap *regmap;
+};
+
+/* Default scale is set to the minimum of 0.03125 or 1 / (1 << 5) lux */
+#define MAX44000_ALS_TO_LUX_DEFAULT_FRACTION_LOG2 5
+
+/* Scale can be multiplied by up to 128x via ALSPGA for measurement gain */
+static const int max44000_alspga_shift[] = {0, 2, 4, 7};
+#define MAX44000_ALSPGA_MAX_SHIFT 7
+
+/*
+ * Scale can be multiplied by up to 64x via ALSTIM because of lost resolution
+ *
+ * This scaling factor is hidden from userspace and instead accounted for when
+ * reading raw values from the device.
+ *
+ * This makes it possible to cleanly expose ALSPGA as IIO_CHAN_INFO_SCALE and
+ * ALSTIM as IIO_CHAN_INFO_INT_TIME without the values affecting each other.
+ *
+ * Handling this internally is also required for buffer support because the
+ * channel's scan_type can't be modified dynamically.
+ */
+static const int max44000_alstim_shift[] = {0, 2, 4, 6};
+#define MAX44000_ALSTIM_SHIFT(alstim) (2 * (alstim))
+
+/* Available integration times with pretty manual alignment: */
+static const int max44000_int_time_avail_ns_array[] = {
+ 100000000,
+ 25000000,
+ 6250000,
+ 1562500,
+};
+static const char max44000_int_time_avail_str[] =
+ "0.100 "
+ "0.025 "
+ "0.00625 "
+ "0.0015625";
+
+/* Available scales (internal to ulux) with pretty manual alignment: */
+static const int max44000_scale_avail_ulux_array[] = {
+ 31250,
+ 125000,
+ 500000,
+ 4000000,
+};
+static const char max44000_scale_avail_str[] =
+ "0.03125 "
+ "0.125 "
+ "0.5 "
+ "4";
+
+#define MAX44000_SCAN_INDEX_ALS 0
+#define MAX44000_SCAN_INDEX_PRX 1
+
+static const struct iio_chan_spec max44000_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .scan_index = MAX44000_SCAN_INDEX_ALS,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 14,
+ .storagebits = 16,
+ }
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .scan_index = MAX44000_SCAN_INDEX_PRX,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 8,
+ .storagebits = 16,
+ }
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(2),
+ {
+ .type = IIO_CURRENT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .extend_name = "led",
+ .output = 1,
+ .scan_index = -1,
+ },
+};
+
+static int max44000_read_alstim(struct max44000_data *data)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(data->regmap, MAX44000_REG_CFG_RX, &val);
+ if (ret < 0)
+ return ret;
+ return (val & MAX44000_CFG_RX_ALSTIM_MASK) >> MAX44000_CFG_RX_ALSTIM_SHIFT;
+}
+
+static int max44000_write_alstim(struct max44000_data *data, int val)
+{
+ return regmap_write_bits(data->regmap, MAX44000_REG_CFG_RX,
+ MAX44000_CFG_RX_ALSTIM_MASK,
+ val << MAX44000_CFG_RX_ALSTIM_SHIFT);
+}
+
+static int max44000_read_alspga(struct max44000_data *data)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(data->regmap, MAX44000_REG_CFG_RX, &val);
+ if (ret < 0)
+ return ret;
+ return (val & MAX44000_CFG_RX_ALSPGA_MASK) >> MAX44000_CFG_RX_ALSPGA_SHIFT;
+}
+
+static int max44000_write_alspga(struct max44000_data *data, int val)
+{
+ return regmap_write_bits(data->regmap, MAX44000_REG_CFG_RX,
+ MAX44000_CFG_RX_ALSPGA_MASK,
+ val << MAX44000_CFG_RX_ALSPGA_SHIFT);
+}
+
+static int max44000_read_alsval(struct max44000_data *data)
+{
+ u16 regval;
+ __be16 val;
+ int alstim, ret;
+
+ ret = regmap_bulk_read(data->regmap, MAX44000_REG_ALS_DATA_HI,
+ &val, sizeof(val));
+ if (ret < 0)
+ return ret;
+ alstim = ret = max44000_read_alstim(data);
+ if (ret < 0)
+ return ret;
+
+ regval = be16_to_cpu(val);
+
+ /*
+ * Overflow is explained on datasheet page 17.
+ *
+ * It's a warning that either the G or IR channel has become saturated
+ * and that the value in the register is likely incorrect.
+ *
+ * The recommendation is to change the scale (ALSPGA).
+ * The driver just returns the max representable value.
+ */
+ if (regval & MAX44000_ALSDATA_OVERFLOW)
+ return 0x3FFF;
+
+ return regval << MAX44000_ALSTIM_SHIFT(alstim);
+}
+
+static int max44000_write_led_current_raw(struct max44000_data *data, int val)
+{
+ /* Maybe we should clamp the value instead? */
+ if (val < 0 || val > MAX44000_LED_CURRENT_MAX)
+ return -ERANGE;
+ if (val >= 8)
+ val += 4;
+ return regmap_write_bits(data->regmap, MAX44000_REG_CFG_TX,
+ MAX44000_LED_CURRENT_MASK, val);
+}
+
+static int max44000_read_led_current_raw(struct max44000_data *data)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(data->regmap, MAX44000_REG_CFG_TX, ®val);
+ if (ret < 0)
+ return ret;
+ regval &= MAX44000_LED_CURRENT_MASK;
+ if (regval >= 8)
+ regval -= 4;
+ return regval;
+}
+
+static int max44000_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct max44000_data *data = iio_priv(indio_dev);
+ int alstim, alspga;
+ unsigned int regval;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ mutex_lock(&data->lock);
+ ret = max44000_read_alsval(data);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+
+ case IIO_PROXIMITY:
+ mutex_lock(&data->lock);
+ ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, ®val);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+ *val = regval;
+ return IIO_VAL_INT;
+
+ case IIO_CURRENT:
+ mutex_lock(&data->lock);
+ ret = max44000_read_led_current_raw(data);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_CURRENT:
+ /* Output register is in 10s of miliamps */
+ *val = 10;
+ return IIO_VAL_INT;
+
+ case IIO_LIGHT:
+ mutex_lock(&data->lock);
+ alspga = ret = max44000_read_alspga(data);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ /* Avoid negative shifts */
+ *val = (1 << MAX44000_ALSPGA_MAX_SHIFT);
+ *val2 = MAX44000_ALS_TO_LUX_DEFAULT_FRACTION_LOG2
+ + MAX44000_ALSPGA_MAX_SHIFT
+ - max44000_alspga_shift[alspga];
+ return IIO_VAL_FRACTIONAL_LOG2;
+
+ default:
+ return -EINVAL;
+ }
+
+ case IIO_CHAN_INFO_INT_TIME:
+ mutex_lock(&data->lock);
+ alstim = ret = max44000_read_alstim(data);
+ mutex_unlock(&data->lock);
+
+ if (ret < 0)
+ return ret;
+ *val = 0;
+ *val2 = max44000_int_time_avail_ns_array[alstim];
+ return IIO_VAL_INT_PLUS_NANO;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int max44000_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct max44000_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (mask == IIO_CHAN_INFO_RAW && chan->type == IIO_CURRENT) {
+ mutex_lock(&data->lock);
+ ret = max44000_write_led_current_raw(data, val);
+ mutex_unlock(&data->lock);
+ return ret;
+ } else if (mask == IIO_CHAN_INFO_INT_TIME && chan->type == IIO_LIGHT) {
+ s64 valns = val * NSEC_PER_SEC + val2;
+ int alstim = find_closest_descending(valns,
+ max44000_int_time_avail_ns_array,
+ ARRAY_SIZE(max44000_int_time_avail_ns_array));
+ mutex_lock(&data->lock);
+ ret = max44000_write_alstim(data, alstim);
+ mutex_unlock(&data->lock);
+ return ret;
+ } else if (mask == IIO_CHAN_INFO_SCALE && chan->type == IIO_LIGHT) {
+ s64 valus = val * USEC_PER_SEC + val2;
+ int alspga = find_closest(valus,
+ max44000_scale_avail_ulux_array,
+ ARRAY_SIZE(max44000_scale_avail_ulux_array));
+ mutex_lock(&data->lock);
+ ret = max44000_write_alspga(data, alspga);
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int max44000_write_raw_get_fmt(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ long mask)
+{
+ if (mask == IIO_CHAN_INFO_INT_TIME && chan->type == IIO_LIGHT)
+ return IIO_VAL_INT_PLUS_NANO;
+ else if (mask == IIO_CHAN_INFO_SCALE && chan->type == IIO_LIGHT)
+ return IIO_VAL_INT_PLUS_MICRO;
+ else
+ return IIO_VAL_INT;
+}
+
+static IIO_CONST_ATTR(illuminance_integration_time_available, max44000_int_time_avail_str);
+static IIO_CONST_ATTR(illuminance_scale_available, max44000_scale_avail_str);
+
+static struct attribute *max44000_attributes[] = {
+ &iio_const_attr_illuminance_integration_time_available.dev_attr.attr,
+ &iio_const_attr_illuminance_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group max44000_attribute_group = {
+ .attrs = max44000_attributes,
+};
+
+static const struct iio_info max44000_info = {
+ .read_raw = max44000_read_raw,
+ .write_raw = max44000_write_raw,
+ .write_raw_get_fmt = max44000_write_raw_get_fmt,
+ .attrs = &max44000_attribute_group,
+};
+
+static bool max44000_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX44000_REG_STATUS:
+ case MAX44000_REG_CFG_MAIN:
+ case MAX44000_REG_CFG_RX:
+ case MAX44000_REG_CFG_TX:
+ case MAX44000_REG_ALS_DATA_HI:
+ case MAX44000_REG_ALS_DATA_LO:
+ case MAX44000_REG_PRX_DATA:
+ case MAX44000_REG_ALS_UPTHR_HI:
+ case MAX44000_REG_ALS_UPTHR_LO:
+ case MAX44000_REG_ALS_LOTHR_HI:
+ case MAX44000_REG_ALS_LOTHR_LO:
+ case MAX44000_REG_PST:
+ case MAX44000_REG_PRX_IND:
+ case MAX44000_REG_PRX_THR:
+ case MAX44000_REG_TRIM_GAIN_GREEN:
+ case MAX44000_REG_TRIM_GAIN_IR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max44000_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX44000_REG_CFG_MAIN:
+ case MAX44000_REG_CFG_RX:
+ case MAX44000_REG_CFG_TX:
+ case MAX44000_REG_ALS_UPTHR_HI:
+ case MAX44000_REG_ALS_UPTHR_LO:
+ case MAX44000_REG_ALS_LOTHR_HI:
+ case MAX44000_REG_ALS_LOTHR_LO:
+ case MAX44000_REG_PST:
+ case MAX44000_REG_PRX_IND:
+ case MAX44000_REG_PRX_THR:
+ case MAX44000_REG_TRIM_GAIN_GREEN:
+ case MAX44000_REG_TRIM_GAIN_IR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max44000_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX44000_REG_STATUS:
+ case MAX44000_REG_ALS_DATA_HI:
+ case MAX44000_REG_ALS_DATA_LO:
+ case MAX44000_REG_PRX_DATA:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max44000_precious_reg(struct device *dev, unsigned int reg)
+{
+ return reg == MAX44000_REG_STATUS;
+}
+
+static const struct regmap_config max44000_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = MAX44000_REG_PRX_DATA,
+ .readable_reg = max44000_readable_reg,
+ .writeable_reg = max44000_writeable_reg,
+ .volatile_reg = max44000_volatile_reg,
+ .precious_reg = max44000_precious_reg,
+
+ .use_single_rw = 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static irqreturn_t max44000_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct max44000_data *data = iio_priv(indio_dev);
+ u16 buf[8]; /* 2x u16 + padding + 8 bytes timestamp */
+ int index = 0;
+ unsigned int regval;
+ int ret;
+
+ mutex_lock(&data->lock);
+ if (test_bit(MAX44000_SCAN_INDEX_ALS, indio_dev->active_scan_mask)) {
+ ret = max44000_read_alsval(data);
+ if (ret < 0)
+ goto out_unlock;
+ buf[index++] = ret;
+ }
+ if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) {
+ ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, ®val);
+ if (ret < 0)
+ goto out_unlock;
+ buf[index] = regval;
+ }
+ mutex_unlock(&data->lock);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buf,
+ iio_get_time_ns(indio_dev));
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+
+out_unlock:
+ mutex_unlock(&data->lock);
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+static int max44000_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max44000_data *data;
+ struct iio_dev *indio_dev;
+ int ret, reg;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+ data = iio_priv(indio_dev);
+ data->regmap = devm_regmap_init_i2c(client, &max44000_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ dev_err(&client->dev, "regmap_init failed!\n");
+ return PTR_ERR(data->regmap);
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+ mutex_init(&data->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &max44000_info;
+ indio_dev->name = MAX44000_DRV_NAME;
+ indio_dev->channels = max44000_channels;
+ indio_dev->num_channels = ARRAY_SIZE(max44000_channels);
+
+ /*
+ * The device doesn't have a reset function so we just clear some
+ * important bits at probe time to ensure sane operation.
+ *
+ * Since we don't support interrupts/events the threshold values are
+ * not important. We also don't touch trim values.
+ */
+
+ /* Reset ALS scaling bits */
+ ret = regmap_write(data->regmap, MAX44000_REG_CFG_RX,
+ MAX44000_REG_CFG_RX_DEFAULT);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to write default CFG_RX: %d\n",
+ ret);
+ return ret;
+ }
+
+ /*
+ * By default the LED pulse used for the proximity sensor is disabled.
+ * Set a middle value so that we get some sort of valid data by default.
+ */
+ ret = max44000_write_led_current_raw(data, MAX44000_LED_CURRENT_DEFAULT);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to write init config: %d\n", ret);
+ return ret;
+ }
+
+ /* Reset CFG bits to ALS_PRX mode which allows easy reading of both values. */
+ reg = MAX44000_CFG_TRIM | MAX44000_CFG_MODE_ALS_PRX;
+ ret = regmap_write(data->regmap, MAX44000_REG_CFG_MAIN, reg);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to write init config: %d\n", ret);
+ return ret;
+ }
+
+ /* Read status at least once to clear any stale interrupt bits. */
+ ret = regmap_read(data->regmap, MAX44000_REG_STATUS, ®);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to read init status: %d\n", ret);
+ return ret;
+ }
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL, max44000_trigger_handler, NULL);
+ if (ret < 0) {
+ dev_err(&client->dev, "iio triggered buffer setup failed\n");
+ return ret;
+ }
+
+ return iio_device_register(indio_dev);
+}
+
+static int max44000_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id max44000_id[] = {
+ {"max44000", 0},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max44000_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id max44000_acpi_match[] = {
+ {"MAX44000", 0},
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, max44000_acpi_match);
+#endif
+
+static struct i2c_driver max44000_driver = {
+ .driver = {
+ .name = MAX44000_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(max44000_acpi_match),
+ },
+ .probe = max44000_probe,
+ .remove = max44000_remove,
+ .id_table = max44000_id,
+};
+
+module_i2c_driver(max44000_driver);
+
+MODULE_AUTHOR("Crestez Dan Leonard <leonard.crestez@intel.com>");
+MODULE_DESCRIPTION("MAX44000 Ambient and Infrared Proximity Sensor");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
new file mode 100644
index 0000000..54d88b6
--- /dev/null
+++ b/drivers/iio/light/opt3001.c
@@ -0,0 +1,859 @@
+/**
+ * opt3001.c - Texas Instruments OPT3001 Light Sensor
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Andreas Dannenberg <dannenberg@ti.com>
+ * Based on previous work from: Felipe Balbi <balbi@ti.com>
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 of the License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define OPT3001_RESULT 0x00
+#define OPT3001_CONFIGURATION 0x01
+#define OPT3001_LOW_LIMIT 0x02
+#define OPT3001_HIGH_LIMIT 0x03
+#define OPT3001_MANUFACTURER_ID 0x7e
+#define OPT3001_DEVICE_ID 0x7f
+
+#define OPT3001_CONFIGURATION_RN_MASK (0xf << 12)
+#define OPT3001_CONFIGURATION_RN_AUTO (0xc << 12)
+
+#define OPT3001_CONFIGURATION_CT BIT(11)
+
+#define OPT3001_CONFIGURATION_M_MASK (3 << 9)
+#define OPT3001_CONFIGURATION_M_SHUTDOWN (0 << 9)
+#define OPT3001_CONFIGURATION_M_SINGLE (1 << 9)
+#define OPT3001_CONFIGURATION_M_CONTINUOUS (2 << 9) /* also 3 << 9 */
+
+#define OPT3001_CONFIGURATION_OVF BIT(8)
+#define OPT3001_CONFIGURATION_CRF BIT(7)
+#define OPT3001_CONFIGURATION_FH BIT(6)
+#define OPT3001_CONFIGURATION_FL BIT(5)
+#define OPT3001_CONFIGURATION_L BIT(4)
+#define OPT3001_CONFIGURATION_POL BIT(3)
+#define OPT3001_CONFIGURATION_ME BIT(2)
+
+#define OPT3001_CONFIGURATION_FC_MASK (3 << 0)
+
+/* The end-of-conversion enable is located in the low-limit register */
+#define OPT3001_LOW_LIMIT_EOC_ENABLE 0xc000
+
+#define OPT3001_REG_EXPONENT(n) ((n) >> 12)
+#define OPT3001_REG_MANTISSA(n) ((n) & 0xfff)
+
+#define OPT3001_INT_TIME_LONG 800000
+#define OPT3001_INT_TIME_SHORT 100000
+
+/*
+ * Time to wait for conversion result to be ready. The device datasheet
+ * sect. 6.5 states results are ready after total integration time plus 3ms.
+ * This results in worst-case max values of 113ms or 883ms, respectively.
+ * Add some slack to be on the safe side.
+ */
+#define OPT3001_RESULT_READY_SHORT 150
+#define OPT3001_RESULT_READY_LONG 1000
+
+struct opt3001 {
+ struct i2c_client *client;
+ struct device *dev;
+
+ struct mutex lock;
+ bool ok_to_ignore_lock;
+ bool result_ready;
+ wait_queue_head_t result_ready_queue;
+ u16 result;
+
+ u32 int_time;
+ u32 mode;
+
+ u16 high_thresh_mantissa;
+ u16 low_thresh_mantissa;
+
+ u8 high_thresh_exp;
+ u8 low_thresh_exp;
+
+ bool use_irq;
+};
+
+struct opt3001_scale {
+ int val;
+ int val2;
+};
+
+static const struct opt3001_scale opt3001_scales[] = {
+ {
+ .val = 40,
+ .val2 = 950000,
+ },
+ {
+ .val = 81,
+ .val2 = 900000,
+ },
+ {
+ .val = 163,
+ .val2 = 800000,
+ },
+ {
+ .val = 327,
+ .val2 = 600000,
+ },
+ {
+ .val = 655,
+ .val2 = 200000,
+ },
+ {
+ .val = 1310,
+ .val2 = 400000,
+ },
+ {
+ .val = 2620,
+ .val2 = 800000,
+ },
+ {
+ .val = 5241,
+ .val2 = 600000,
+ },
+ {
+ .val = 10483,
+ .val2 = 200000,
+ },
+ {
+ .val = 20966,
+ .val2 = 400000,
+ },
+ {
+ .val = 83865,
+ .val2 = 600000,
+ },
+};
+
+static int opt3001_find_scale(const struct opt3001 *opt, int val,
+ int val2, u8 *exponent)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(opt3001_scales); i++) {
+ const struct opt3001_scale *scale = &opt3001_scales[i];
+
+ /*
+ * Combine the integer and micro parts for comparison
+ * purposes. Use milli lux precision to avoid 32-bit integer
+ * overflows.
+ */
+ if ((val * 1000 + val2 / 1000) <=
+ (scale->val * 1000 + scale->val2 / 1000)) {
+ *exponent = i;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static void opt3001_to_iio_ret(struct opt3001 *opt, u8 exponent,
+ u16 mantissa, int *val, int *val2)
+{
+ int lux;
+
+ lux = 10 * (mantissa << exponent);
+ *val = lux / 1000;
+ *val2 = (lux - (*val * 1000)) * 1000;
+}
+
+static void opt3001_set_mode(struct opt3001 *opt, u16 *reg, u16 mode)
+{
+ *reg &= ~OPT3001_CONFIGURATION_M_MASK;
+ *reg |= mode;
+ opt->mode = mode;
+}
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.1 0.8");
+
+static struct attribute *opt3001_attributes[] = {
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group opt3001_attribute_group = {
+ .attrs = opt3001_attributes,
+};
+
+static const struct iio_event_spec opt3001_event_spec[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec opt3001_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .event_spec = opt3001_event_spec,
+ .num_event_specs = ARRAY_SIZE(opt3001_event_spec),
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
+{
+ int ret;
+ u16 mantissa;
+ u16 reg;
+ u8 exponent;
+ u16 value;
+ long timeout;
+
+ if (opt->use_irq) {
+ /*
+ * Enable the end-of-conversion interrupt mechanism. Note that
+ * doing so will overwrite the low-level limit value however we
+ * will restore this value later on.
+ */
+ ret = i2c_smbus_write_word_swapped(opt->client,
+ OPT3001_LOW_LIMIT,
+ OPT3001_LOW_LIMIT_EOC_ENABLE);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_LOW_LIMIT);
+ return ret;
+ }
+
+ /* Allow IRQ to access the device despite lock being set */
+ opt->ok_to_ignore_lock = true;
+ }
+
+ /* Reset data-ready indicator flag */
+ opt->result_ready = false;
+
+ /* Configure for single-conversion mode and start a new conversion */
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto err;
+ }
+
+ reg = ret;
+ opt3001_set_mode(opt, ®, OPT3001_CONFIGURATION_M_SINGLE);
+
+ ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
+ reg);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto err;
+ }
+
+ if (opt->use_irq) {
+ /* Wait for the IRQ to indicate the conversion is complete */
+ ret = wait_event_timeout(opt->result_ready_queue,
+ opt->result_ready,
+ msecs_to_jiffies(OPT3001_RESULT_READY_LONG));
+ } else {
+ /* Sleep for result ready time */
+ timeout = (opt->int_time == OPT3001_INT_TIME_SHORT) ?
+ OPT3001_RESULT_READY_SHORT : OPT3001_RESULT_READY_LONG;
+ msleep(timeout);
+
+ /* Check result ready flag */
+ ret = i2c_smbus_read_word_swapped(opt->client,
+ OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto err;
+ }
+
+ if (!(ret & OPT3001_CONFIGURATION_CRF)) {
+ ret = -ETIMEDOUT;
+ goto err;
+ }
+
+ /* Obtain value */
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_RESULT);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_RESULT);
+ goto err;
+ }
+ opt->result = ret;
+ opt->result_ready = true;
+ }
+
+err:
+ if (opt->use_irq)
+ /* Disallow IRQ to access the device while lock is active */
+ opt->ok_to_ignore_lock = false;
+
+ if (ret == 0)
+ return -ETIMEDOUT;
+ else if (ret < 0)
+ return ret;
+
+ if (opt->use_irq) {
+ /*
+ * Disable the end-of-conversion interrupt mechanism by
+ * restoring the low-level limit value (clearing
+ * OPT3001_LOW_LIMIT_EOC_ENABLE). Note that selectively clearing
+ * those enable bits would affect the actual limit value due to
+ * bit-overlap and therefore can't be done.
+ */
+ value = (opt->low_thresh_exp << 12) | opt->low_thresh_mantissa;
+ ret = i2c_smbus_write_word_swapped(opt->client,
+ OPT3001_LOW_LIMIT,
+ value);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_LOW_LIMIT);
+ return ret;
+ }
+ }
+
+ exponent = OPT3001_REG_EXPONENT(opt->result);
+ mantissa = OPT3001_REG_MANTISSA(opt->result);
+
+ opt3001_to_iio_ret(opt, exponent, mantissa, val, val2);
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int opt3001_get_int_time(struct opt3001 *opt, int *val, int *val2)
+{
+ *val = 0;
+ *val2 = opt->int_time;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int opt3001_set_int_time(struct opt3001 *opt, int time)
+{
+ int ret;
+ u16 reg;
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ return ret;
+ }
+
+ reg = ret;
+
+ switch (time) {
+ case OPT3001_INT_TIME_SHORT:
+ reg &= ~OPT3001_CONFIGURATION_CT;
+ opt->int_time = OPT3001_INT_TIME_SHORT;
+ break;
+ case OPT3001_INT_TIME_LONG:
+ reg |= OPT3001_CONFIGURATION_CT;
+ opt->int_time = OPT3001_INT_TIME_LONG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
+ reg);
+}
+
+static int opt3001_read_raw(struct iio_dev *iio,
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
+{
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+
+ if (opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS)
+ return -EBUSY;
+
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ mutex_lock(&opt->lock);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = opt3001_get_lux(opt, val, val2);
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ ret = opt3001_get_int_time(opt, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&opt->lock);
+
+ return ret;
+}
+
+static int opt3001_write_raw(struct iio_dev *iio,
+ struct iio_chan_spec const *chan, int val, int val2,
+ long mask)
+{
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+
+ if (opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS)
+ return -EBUSY;
+
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ if (mask != IIO_CHAN_INFO_INT_TIME)
+ return -EINVAL;
+
+ if (val != 0)
+ return -EINVAL;
+
+ mutex_lock(&opt->lock);
+ ret = opt3001_set_int_time(opt, val2);
+ mutex_unlock(&opt->lock);
+
+ return ret;
+}
+
+static int opt3001_read_event_value(struct iio_dev *iio,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct opt3001 *opt = iio_priv(iio);
+ int ret = IIO_VAL_INT_PLUS_MICRO;
+
+ mutex_lock(&opt->lock);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ opt3001_to_iio_ret(opt, opt->high_thresh_exp,
+ opt->high_thresh_mantissa, val, val2);
+ break;
+ case IIO_EV_DIR_FALLING:
+ opt3001_to_iio_ret(opt, opt->low_thresh_exp,
+ opt->low_thresh_mantissa, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&opt->lock);
+
+ return ret;
+}
+
+static int opt3001_write_event_value(struct iio_dev *iio,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info,
+ int val, int val2)
+{
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+
+ u16 mantissa;
+ u16 value;
+ u16 reg;
+
+ u8 exponent;
+
+ if (val < 0)
+ return -EINVAL;
+
+ mutex_lock(&opt->lock);
+
+ ret = opt3001_find_scale(opt, val, val2, &exponent);
+ if (ret < 0) {
+ dev_err(opt->dev, "can't find scale for %d.%06u\n", val, val2);
+ goto err;
+ }
+
+ mantissa = (((val * 1000) + (val2 / 1000)) / 10) >> exponent;
+ value = (exponent << 12) | mantissa;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ reg = OPT3001_HIGH_LIMIT;
+ opt->high_thresh_mantissa = mantissa;
+ opt->high_thresh_exp = exponent;
+ break;
+ case IIO_EV_DIR_FALLING:
+ reg = OPT3001_LOW_LIMIT;
+ opt->low_thresh_mantissa = mantissa;
+ opt->low_thresh_exp = exponent;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = i2c_smbus_write_word_swapped(opt->client, reg, value);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n", reg);
+ goto err;
+ }
+
+err:
+ mutex_unlock(&opt->lock);
+
+ return ret;
+}
+
+static int opt3001_read_event_config(struct iio_dev *iio,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct opt3001 *opt = iio_priv(iio);
+
+ return opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS;
+}
+
+static int opt3001_write_event_config(struct iio_dev *iio,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+ u16 mode;
+ u16 reg;
+
+ if (state && opt->mode == OPT3001_CONFIGURATION_M_CONTINUOUS)
+ return 0;
+
+ if (!state && opt->mode == OPT3001_CONFIGURATION_M_SHUTDOWN)
+ return 0;
+
+ mutex_lock(&opt->lock);
+
+ mode = state ? OPT3001_CONFIGURATION_M_CONTINUOUS
+ : OPT3001_CONFIGURATION_M_SHUTDOWN;
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto err;
+ }
+
+ reg = ret;
+ opt3001_set_mode(opt, ®, mode);
+
+ ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
+ reg);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto err;
+ }
+
+err:
+ mutex_unlock(&opt->lock);
+
+ return ret;
+}
+
+static const struct iio_info opt3001_info = {
+ .attrs = &opt3001_attribute_group,
+ .read_raw = opt3001_read_raw,
+ .write_raw = opt3001_write_raw,
+ .read_event_value = opt3001_read_event_value,
+ .write_event_value = opt3001_write_event_value,
+ .read_event_config = opt3001_read_event_config,
+ .write_event_config = opt3001_write_event_config,
+};
+
+static int opt3001_read_id(struct opt3001 *opt)
+{
+ char manufacturer[2];
+ u16 device_id;
+ int ret;
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_MANUFACTURER_ID);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_MANUFACTURER_ID);
+ return ret;
+ }
+
+ manufacturer[0] = ret >> 8;
+ manufacturer[1] = ret & 0xff;
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_DEVICE_ID);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_DEVICE_ID);
+ return ret;
+ }
+
+ device_id = ret;
+
+ dev_info(opt->dev, "Found %c%c OPT%04x\n", manufacturer[0],
+ manufacturer[1], device_id);
+
+ return 0;
+}
+
+static int opt3001_configure(struct opt3001 *opt)
+{
+ int ret;
+ u16 reg;
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ return ret;
+ }
+
+ reg = ret;
+
+ /* Enable automatic full-scale setting mode */
+ reg &= ~OPT3001_CONFIGURATION_RN_MASK;
+ reg |= OPT3001_CONFIGURATION_RN_AUTO;
+
+ /* Reflect status of the device's integration time setting */
+ if (reg & OPT3001_CONFIGURATION_CT)
+ opt->int_time = OPT3001_INT_TIME_LONG;
+ else
+ opt->int_time = OPT3001_INT_TIME_SHORT;
+
+ /* Ensure device is in shutdown initially */
+ opt3001_set_mode(opt, ®, OPT3001_CONFIGURATION_M_SHUTDOWN);
+
+ /* Configure for latched window-style comparison operation */
+ reg |= OPT3001_CONFIGURATION_L;
+ reg &= ~OPT3001_CONFIGURATION_POL;
+ reg &= ~OPT3001_CONFIGURATION_ME;
+ reg &= ~OPT3001_CONFIGURATION_FC_MASK;
+
+ ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
+ reg);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_CONFIGURATION);
+ return ret;
+ }
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_LOW_LIMIT);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_LOW_LIMIT);
+ return ret;
+ }
+
+ opt->low_thresh_mantissa = OPT3001_REG_MANTISSA(ret);
+ opt->low_thresh_exp = OPT3001_REG_EXPONENT(ret);
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_HIGH_LIMIT);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_HIGH_LIMIT);
+ return ret;
+ }
+
+ opt->high_thresh_mantissa = OPT3001_REG_MANTISSA(ret);
+ opt->high_thresh_exp = OPT3001_REG_EXPONENT(ret);
+
+ return 0;
+}
+
+static irqreturn_t opt3001_irq(int irq, void *_iio)
+{
+ struct iio_dev *iio = _iio;
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+
+ if (!opt->ok_to_ignore_lock)
+ mutex_lock(&opt->lock);
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ goto out;
+ }
+
+ if ((ret & OPT3001_CONFIGURATION_M_MASK) ==
+ OPT3001_CONFIGURATION_M_CONTINUOUS) {
+ if (ret & OPT3001_CONFIGURATION_FH)
+ iio_push_event(iio,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ iio_get_time_ns(iio));
+ if (ret & OPT3001_CONFIGURATION_FL)
+ iio_push_event(iio,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ iio_get_time_ns(iio));
+ } else if (ret & OPT3001_CONFIGURATION_CRF) {
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_RESULT);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_RESULT);
+ goto out;
+ }
+ opt->result = ret;
+ opt->result_ready = true;
+ wake_up(&opt->result_ready_queue);
+ }
+
+out:
+ if (!opt->ok_to_ignore_lock)
+ mutex_unlock(&opt->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int opt3001_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+
+ struct iio_dev *iio;
+ struct opt3001 *opt;
+ int irq = client->irq;
+ int ret;
+
+ iio = devm_iio_device_alloc(dev, sizeof(*opt));
+ if (!iio)
+ return -ENOMEM;
+
+ opt = iio_priv(iio);
+ opt->client = client;
+ opt->dev = dev;
+
+ mutex_init(&opt->lock);
+ init_waitqueue_head(&opt->result_ready_queue);
+ i2c_set_clientdata(client, iio);
+
+ ret = opt3001_read_id(opt);
+ if (ret)
+ return ret;
+
+ ret = opt3001_configure(opt);
+ if (ret)
+ return ret;
+
+ iio->name = client->name;
+ iio->channels = opt3001_channels;
+ iio->num_channels = ARRAY_SIZE(opt3001_channels);
+ iio->dev.parent = dev;
+ iio->modes = INDIO_DIRECT_MODE;
+ iio->info = &opt3001_info;
+
+ ret = devm_iio_device_register(dev, iio);
+ if (ret) {
+ dev_err(dev, "failed to register IIO device\n");
+ return ret;
+ }
+
+ /* Make use of INT pin only if valid IRQ no. is given */
+ if (irq > 0) {
+ ret = request_threaded_irq(irq, NULL, opt3001_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "opt3001", iio);
+ if (ret) {
+ dev_err(dev, "failed to request IRQ #%d\n", irq);
+ return ret;
+ }
+ opt->use_irq = true;
+ } else {
+ dev_dbg(opt->dev, "enabling interrupt-less operation\n");
+ }
+
+ return 0;
+}
+
+static int opt3001_remove(struct i2c_client *client)
+{
+ struct iio_dev *iio = i2c_get_clientdata(client);
+ struct opt3001 *opt = iio_priv(iio);
+ int ret;
+ u16 reg;
+
+ if (opt->use_irq)
+ free_irq(client->irq, iio);
+
+ ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to read register %02x\n",
+ OPT3001_CONFIGURATION);
+ return ret;
+ }
+
+ reg = ret;
+ opt3001_set_mode(opt, ®, OPT3001_CONFIGURATION_M_SHUTDOWN);
+
+ ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
+ reg);
+ if (ret < 0) {
+ dev_err(opt->dev, "failed to write register %02x\n",
+ OPT3001_CONFIGURATION);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id opt3001_id[] = {
+ { "opt3001", 0 },
+ { } /* Terminating Entry */
+};
+MODULE_DEVICE_TABLE(i2c, opt3001_id);
+
+static const struct of_device_id opt3001_of_match[] = {
+ { .compatible = "ti,opt3001" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, opt3001_of_match);
+
+static struct i2c_driver opt3001_driver = {
+ .probe = opt3001_probe,
+ .remove = opt3001_remove,
+ .id_table = opt3001_id,
+
+ .driver = {
+ .name = "opt3001",
+ .of_match_table = of_match_ptr(opt3001_of_match),
+ },
+};
+
+module_i2c_driver(opt3001_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>");
+MODULE_DESCRIPTION("Texas Instruments OPT3001 Light Sensor Driver");
diff --git a/drivers/iio/light/pa12203001.c b/drivers/iio/light/pa12203001.c
new file mode 100644
index 0000000..30ea1a0
--- /dev/null
+++ b/drivers/iio/light/pa12203001.c
@@ -0,0 +1,488 @@
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Driver for TXC PA12203001 Proximity and Ambient Light Sensor.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ * To do: Interrupt support.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/mutex.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+
+#define PA12203001_DRIVER_NAME "pa12203001"
+
+#define PA12203001_REG_CFG0 0x00
+#define PA12203001_REG_CFG1 0x01
+#define PA12203001_REG_CFG2 0x02
+#define PA12203001_REG_CFG3 0x03
+
+#define PA12203001_REG_ADL 0x0b
+#define PA12203001_REG_PDH 0x0e
+
+#define PA12203001_REG_POFS 0x10
+#define PA12203001_REG_PSET 0x11
+
+#define PA12203001_ALS_EN_MASK BIT(0)
+#define PA12203001_PX_EN_MASK BIT(1)
+#define PA12203001_PX_NORMAL_MODE_MASK GENMASK(7, 6)
+#define PA12203001_AFSR_MASK GENMASK(5, 4)
+#define PA12203001_AFSR_SHIFT 4
+
+#define PA12203001_PSCAN 0x03
+
+/* als range 31000, ps, als disabled */
+#define PA12203001_REG_CFG0_DEFAULT 0x30
+
+/* led current: 100 mA */
+#define PA12203001_REG_CFG1_DEFAULT 0x20
+
+/* ps mode: normal, interrupts not active */
+#define PA12203001_REG_CFG2_DEFAULT 0xcc
+
+#define PA12203001_REG_CFG3_DEFAULT 0x00
+
+#define PA12203001_SLEEP_DELAY_MS 3000
+
+#define PA12203001_CHIP_ENABLE 0xff
+#define PA12203001_CHIP_DISABLE 0x00
+
+/* available scales: corresponding to [500, 4000, 7000, 31000] lux */
+static const int pa12203001_scales[] = { 7629, 61036, 106813, 473029};
+
+struct pa12203001_data {
+ struct i2c_client *client;
+
+ /* protect device states */
+ struct mutex lock;
+
+ bool als_enabled;
+ bool px_enabled;
+ bool als_needs_enable;
+ bool px_needs_enable;
+
+ struct regmap *map;
+};
+
+static const struct {
+ u8 reg;
+ u8 val;
+} regvals[] = {
+ {PA12203001_REG_CFG0, PA12203001_REG_CFG0_DEFAULT},
+ {PA12203001_REG_CFG1, PA12203001_REG_CFG1_DEFAULT},
+ {PA12203001_REG_CFG2, PA12203001_REG_CFG2_DEFAULT},
+ {PA12203001_REG_CFG3, PA12203001_REG_CFG3_DEFAULT},
+ {PA12203001_REG_PSET, PA12203001_PSCAN},
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available,
+ "0.007629 0.061036 0.106813 0.473029");
+
+static struct attribute *pa12203001_attrs[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group pa12203001_attr_group = {
+ .attrs = pa12203001_attrs,
+};
+
+static const struct iio_chan_spec pa12203001_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }
+};
+
+static const struct regmap_range pa12203001_volatile_regs_ranges[] = {
+ regmap_reg_range(PA12203001_REG_ADL, PA12203001_REG_ADL + 1),
+ regmap_reg_range(PA12203001_REG_PDH, PA12203001_REG_PDH),
+};
+
+static const struct regmap_access_table pa12203001_volatile_regs = {
+ .yes_ranges = pa12203001_volatile_regs_ranges,
+ .n_yes_ranges = ARRAY_SIZE(pa12203001_volatile_regs_ranges),
+};
+
+static const struct regmap_config pa12203001_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = PA12203001_REG_PSET,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_table = &pa12203001_volatile_regs,
+};
+
+static inline int pa12203001_als_enable(struct pa12203001_data *data, u8 enable)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->map, PA12203001_REG_CFG0,
+ PA12203001_ALS_EN_MASK, enable);
+ if (ret < 0)
+ return ret;
+
+ data->als_enabled = !!enable;
+
+ return 0;
+}
+
+static inline int pa12203001_px_enable(struct pa12203001_data *data, u8 enable)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->map, PA12203001_REG_CFG0,
+ PA12203001_PX_EN_MASK, enable);
+ if (ret < 0)
+ return ret;
+
+ data->px_enabled = !!enable;
+
+ return 0;
+}
+
+static int pa12203001_set_power_state(struct pa12203001_data *data, bool on,
+ u8 mask)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (on && (mask & PA12203001_ALS_EN_MASK)) {
+ mutex_lock(&data->lock);
+ if (data->px_enabled) {
+ ret = pa12203001_als_enable(data,
+ PA12203001_ALS_EN_MASK);
+ if (ret < 0)
+ goto err;
+ } else {
+ data->als_needs_enable = true;
+ }
+ mutex_unlock(&data->lock);
+ }
+
+ if (on && (mask & PA12203001_PX_EN_MASK)) {
+ mutex_lock(&data->lock);
+ if (data->als_enabled) {
+ ret = pa12203001_px_enable(data, PA12203001_PX_EN_MASK);
+ if (ret < 0)
+ goto err;
+ } else {
+ data->px_needs_enable = true;
+ }
+ mutex_unlock(&data->lock);
+ }
+
+ if (on) {
+ ret = pm_runtime_get_sync(&data->client->dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(&data->client->dev);
+
+ } else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+
+ return ret;
+
+err:
+ mutex_unlock(&data->lock);
+ return ret;
+
+#endif
+ return 0;
+}
+
+static int pa12203001_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct pa12203001_data *data = iio_priv(indio_dev);
+ int ret;
+ u8 dev_mask;
+ unsigned int reg_byte;
+ __le16 reg_word;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ dev_mask = PA12203001_ALS_EN_MASK;
+ ret = pa12203001_set_power_state(data, true, dev_mask);
+ if (ret < 0)
+ return ret;
+ /*
+ * ALS ADC value is stored in registers
+ * PA12203001_REG_ADL and in PA12203001_REG_ADL + 1.
+ */
+ ret = regmap_bulk_read(data->map, PA12203001_REG_ADL,
+ ®_word, 2);
+ if (ret < 0)
+ goto reg_err;
+
+ *val = le16_to_cpu(reg_word);
+ ret = pa12203001_set_power_state(data, false, dev_mask);
+ if (ret < 0)
+ return ret;
+ break;
+ case IIO_PROXIMITY:
+ dev_mask = PA12203001_PX_EN_MASK;
+ ret = pa12203001_set_power_state(data, true, dev_mask);
+ if (ret < 0)
+ return ret;
+ ret = regmap_read(data->map, PA12203001_REG_PDH,
+ ®_byte);
+ if (ret < 0)
+ goto reg_err;
+
+ *val = reg_byte;
+ ret = pa12203001_set_power_state(data, false, dev_mask);
+ if (ret < 0)
+ return ret;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = regmap_read(data->map, PA12203001_REG_CFG0, ®_byte);
+ if (ret < 0)
+ return ret;
+ *val = 0;
+ reg_byte = (reg_byte & PA12203001_AFSR_MASK);
+ *val2 = pa12203001_scales[reg_byte >> 4];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+reg_err:
+ pa12203001_set_power_state(data, false, dev_mask);
+ return ret;
+}
+
+static int pa12203001_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct pa12203001_data *data = iio_priv(indio_dev);
+ int i, ret, new_val;
+ unsigned int reg_byte;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ ret = regmap_read(data->map, PA12203001_REG_CFG0, ®_byte);
+ if (val != 0 || ret < 0)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(pa12203001_scales); i++) {
+ if (val2 == pa12203001_scales[i]) {
+ new_val = i << PA12203001_AFSR_SHIFT;
+ return regmap_update_bits(data->map,
+ PA12203001_REG_CFG0,
+ PA12203001_AFSR_MASK,
+ new_val);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_info pa12203001_info = {
+ .read_raw = pa12203001_read_raw,
+ .write_raw = pa12203001_write_raw,
+ .attrs = &pa12203001_attr_group,
+};
+
+static int pa12203001_init(struct iio_dev *indio_dev)
+{
+ struct pa12203001_data *data = iio_priv(indio_dev);
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(regvals); i++) {
+ ret = regmap_write(data->map, regvals[i].reg, regvals[i].val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pa12203001_power_chip(struct iio_dev *indio_dev, u8 state)
+{
+ struct pa12203001_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = pa12203001_als_enable(data, state);
+ if (ret < 0)
+ goto out;
+
+ ret = pa12203001_px_enable(data, state);
+
+out:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int pa12203001_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pa12203001_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev,
+ sizeof(struct pa12203001_data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ data->map = devm_regmap_init_i2c(client, &pa12203001_regmap_config);
+ if (IS_ERR(data->map))
+ return PTR_ERR(data->map);
+
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &pa12203001_info;
+ indio_dev->name = PA12203001_DRIVER_NAME;
+ indio_dev->channels = pa12203001_channels;
+ indio_dev->num_channels = ARRAY_SIZE(pa12203001_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = pa12203001_init(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = pa12203001_power_chip(indio_dev, PA12203001_CHIP_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto out_err;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ PA12203001_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ pa12203001_power_chip(indio_dev, PA12203001_CHIP_DISABLE);
+ return ret;
+}
+
+static int pa12203001_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ return pa12203001_power_chip(indio_dev, PA12203001_CHIP_DISABLE);
+}
+
+#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM)
+static int pa12203001_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+
+ return pa12203001_power_chip(indio_dev, PA12203001_CHIP_DISABLE);
+}
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int pa12203001_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+
+ return pa12203001_power_chip(indio_dev, PA12203001_CHIP_ENABLE);
+}
+#endif
+
+#ifdef CONFIG_PM
+static int pa12203001_runtime_resume(struct device *dev)
+{
+ struct pa12203001_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ mutex_lock(&data->lock);
+ if (data->als_needs_enable) {
+ pa12203001_als_enable(data, PA12203001_ALS_EN_MASK);
+ data->als_needs_enable = false;
+ }
+ if (data->px_needs_enable) {
+ pa12203001_px_enable(data, PA12203001_PX_EN_MASK);
+ data->px_needs_enable = false;
+ }
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops pa12203001_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pa12203001_suspend, pa12203001_resume)
+ SET_RUNTIME_PM_OPS(pa12203001_suspend, pa12203001_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id pa12203001_acpi_match[] = {
+ { "TXCPA122", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, pa12203001_acpi_match);
+
+static const struct i2c_device_id pa12203001_id[] = {
+ {"txcpa122", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, pa12203001_id);
+
+static struct i2c_driver pa12203001_driver = {
+ .driver = {
+ .name = PA12203001_DRIVER_NAME,
+ .pm = &pa12203001_pm_ops,
+ .acpi_match_table = ACPI_PTR(pa12203001_acpi_match),
+ },
+ .probe = pa12203001_probe,
+ .remove = pa12203001_remove,
+ .id_table = pa12203001_id,
+
+};
+module_i2c_driver(pa12203001_driver);
+
+MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
+MODULE_DESCRIPTION("Driver for TXC PA12203001 Proximity and Light Sensor");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/rpr0521.c b/drivers/iio/light/rpr0521.c
new file mode 100644
index 0000000..ffe9ce7
--- /dev/null
+++ b/drivers/iio/light/rpr0521.c
@@ -0,0 +1,1142 @@
+/*
+ * RPR-0521 ROHM Ambient Light and Proximity Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38).
+ *
+ * TODO: illuminance channel
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/sysfs.h>
+#include <linux/pm_runtime.h>
+
+#define RPR0521_REG_SYSTEM_CTRL 0x40
+#define RPR0521_REG_MODE_CTRL 0x41
+#define RPR0521_REG_ALS_CTRL 0x42
+#define RPR0521_REG_PXS_CTRL 0x43
+#define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */
+#define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */
+#define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */
+#define RPR0521_REG_INTERRUPT 0x4A
+#define RPR0521_REG_PS_OFFSET_LSB 0x53
+#define RPR0521_REG_ID 0x92
+
+#define RPR0521_MODE_ALS_MASK BIT(7)
+#define RPR0521_MODE_PXS_MASK BIT(6)
+#define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0)
+#define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4)
+#define RPR0521_ALS_DATA0_GAIN_SHIFT 4
+#define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2)
+#define RPR0521_ALS_DATA1_GAIN_SHIFT 2
+#define RPR0521_PXS_GAIN_MASK GENMASK(5, 4)
+#define RPR0521_PXS_GAIN_SHIFT 4
+#define RPR0521_PXS_PERSISTENCE_MASK GENMASK(3, 0)
+#define RPR0521_INTERRUPT_INT_TRIG_PS_MASK BIT(0)
+#define RPR0521_INTERRUPT_INT_TRIG_ALS_MASK BIT(1)
+#define RPR0521_INTERRUPT_INT_REASSERT_MASK BIT(3)
+#define RPR0521_INTERRUPT_ALS_INT_STATUS_MASK BIT(6)
+#define RPR0521_INTERRUPT_PS_INT_STATUS_MASK BIT(7)
+
+#define RPR0521_MODE_ALS_ENABLE BIT(7)
+#define RPR0521_MODE_ALS_DISABLE 0x00
+#define RPR0521_MODE_PXS_ENABLE BIT(6)
+#define RPR0521_MODE_PXS_DISABLE 0x00
+#define RPR0521_PXS_PERSISTENCE_DRDY 0x00
+
+#define RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE BIT(0)
+#define RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE 0x00
+#define RPR0521_INTERRUPT_INT_TRIG_ALS_ENABLE BIT(1)
+#define RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE 0x00
+#define RPR0521_INTERRUPT_INT_REASSERT_ENABLE BIT(3)
+#define RPR0521_INTERRUPT_INT_REASSERT_DISABLE 0x00
+
+#define RPR0521_MANUFACT_ID 0xE0
+#define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */
+
+#define RPR0521_DRV_NAME "RPR0521"
+#define RPR0521_IRQ_NAME "rpr0521_event"
+#define RPR0521_REGMAP_NAME "rpr0521_regmap"
+
+#define RPR0521_SLEEP_DELAY_MS 2000
+
+#define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1"
+#define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1"
+
+struct rpr0521_gain {
+ int scale;
+ int uscale;
+};
+
+static const struct rpr0521_gain rpr0521_als_gain[4] = {
+ {1, 0}, /* x1 */
+ {0, 500000}, /* x2 */
+ {0, 15625}, /* x64 */
+ {0, 7812}, /* x128 */
+};
+
+static const struct rpr0521_gain rpr0521_pxs_gain[3] = {
+ {1, 0}, /* x1 */
+ {0, 500000}, /* x2 */
+ {0, 125000}, /* x4 */
+};
+
+enum rpr0521_channel {
+ RPR0521_CHAN_PXS,
+ RPR0521_CHAN_ALS_DATA0,
+ RPR0521_CHAN_ALS_DATA1,
+};
+
+struct rpr0521_reg_desc {
+ u8 address;
+ u8 device_mask;
+};
+
+static const struct rpr0521_reg_desc rpr0521_data_reg[] = {
+ [RPR0521_CHAN_PXS] = {
+ .address = RPR0521_REG_PXS_DATA,
+ .device_mask = RPR0521_MODE_PXS_MASK,
+ },
+ [RPR0521_CHAN_ALS_DATA0] = {
+ .address = RPR0521_REG_ALS_DATA0,
+ .device_mask = RPR0521_MODE_ALS_MASK,
+ },
+ [RPR0521_CHAN_ALS_DATA1] = {
+ .address = RPR0521_REG_ALS_DATA1,
+ .device_mask = RPR0521_MODE_ALS_MASK,
+ },
+};
+
+static const struct rpr0521_gain_info {
+ u8 reg;
+ u8 mask;
+ u8 shift;
+ const struct rpr0521_gain *gain;
+ int size;
+} rpr0521_gain[] = {
+ [RPR0521_CHAN_PXS] = {
+ .reg = RPR0521_REG_PXS_CTRL,
+ .mask = RPR0521_PXS_GAIN_MASK,
+ .shift = RPR0521_PXS_GAIN_SHIFT,
+ .gain = rpr0521_pxs_gain,
+ .size = ARRAY_SIZE(rpr0521_pxs_gain),
+ },
+ [RPR0521_CHAN_ALS_DATA0] = {
+ .reg = RPR0521_REG_ALS_CTRL,
+ .mask = RPR0521_ALS_DATA0_GAIN_MASK,
+ .shift = RPR0521_ALS_DATA0_GAIN_SHIFT,
+ .gain = rpr0521_als_gain,
+ .size = ARRAY_SIZE(rpr0521_als_gain),
+ },
+ [RPR0521_CHAN_ALS_DATA1] = {
+ .reg = RPR0521_REG_ALS_CTRL,
+ .mask = RPR0521_ALS_DATA1_GAIN_MASK,
+ .shift = RPR0521_ALS_DATA1_GAIN_SHIFT,
+ .gain = rpr0521_als_gain,
+ .size = ARRAY_SIZE(rpr0521_als_gain),
+ },
+};
+
+struct rpr0521_samp_freq {
+ int als_hz;
+ int als_uhz;
+ int pxs_hz;
+ int pxs_uhz;
+};
+
+static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = {
+/* {ALS, PXS}, W==currently writable option */
+ {0, 0, 0, 0}, /* W0000, 0=standby */
+ {0, 0, 100, 0}, /* 0001 */
+ {0, 0, 25, 0}, /* 0010 */
+ {0, 0, 10, 0}, /* 0011 */
+ {0, 0, 2, 500000}, /* 0100 */
+ {10, 0, 20, 0}, /* 0101 */
+ {10, 0, 10, 0}, /* W0110 */
+ {10, 0, 2, 500000}, /* 0111 */
+ {2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */
+ {2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */
+ {2, 500000, 0, 0}, /* 1010, high sensitivity mode */
+ {2, 500000, 2, 500000}, /* W1011, high sensitivity mode */
+ {20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */
+};
+
+struct rpr0521_data {
+ struct i2c_client *client;
+
+ /* protect device params updates (e.g state, gain) */
+ struct mutex lock;
+
+ /* device active status */
+ bool als_dev_en;
+ bool pxs_dev_en;
+
+ struct iio_trigger *drdy_trigger0;
+ s64 irq_timestamp;
+
+ /* optimize runtime pm ops - enable/disable device only if needed */
+ bool als_ps_need_en;
+ bool pxs_ps_need_en;
+ bool als_need_dis;
+ bool pxs_need_dis;
+
+ struct regmap *regmap;
+};
+
+static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL);
+static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL);
+
+/*
+ * Start with easy freq first, whole table of freq combinations is more
+ * complicated.
+ */
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10");
+
+static struct attribute *rpr0521_attributes[] = {
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group rpr0521_attribute_group = {
+ .attrs = rpr0521_attributes,
+};
+
+/* Order of the channel data in buffer */
+enum rpr0521_scan_index_order {
+ RPR0521_CHAN_INDEX_PXS,
+ RPR0521_CHAN_INDEX_BOTH,
+ RPR0521_CHAN_INDEX_IR,
+};
+
+static const unsigned long rpr0521_available_scan_masks[] = {
+ BIT(RPR0521_CHAN_INDEX_PXS) | BIT(RPR0521_CHAN_INDEX_BOTH) |
+ BIT(RPR0521_CHAN_INDEX_IR),
+ 0
+};
+
+static const struct iio_chan_spec rpr0521_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .address = RPR0521_CHAN_PXS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .scan_index = RPR0521_CHAN_INDEX_PXS,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ },
+ {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .address = RPR0521_CHAN_ALS_DATA0,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .scan_index = RPR0521_CHAN_INDEX_BOTH,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ },
+ {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .address = RPR0521_CHAN_ALS_DATA1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+ .scan_index = RPR0521_CHAN_INDEX_IR,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 16,
+ .storagebits = 16,
+ .endianness = IIO_LE,
+ },
+ },
+};
+
+static int rpr0521_als_enable(struct rpr0521_data *data, u8 status)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
+ RPR0521_MODE_ALS_MASK,
+ status);
+ if (ret < 0)
+ return ret;
+
+ if (status & RPR0521_MODE_ALS_MASK)
+ data->als_dev_en = true;
+ else
+ data->als_dev_en = false;
+
+ return 0;
+}
+
+static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status)
+{
+ int ret;
+
+ ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
+ RPR0521_MODE_PXS_MASK,
+ status);
+ if (ret < 0)
+ return ret;
+
+ if (status & RPR0521_MODE_PXS_MASK)
+ data->pxs_dev_en = true;
+ else
+ data->pxs_dev_en = false;
+
+ return 0;
+}
+
+/**
+ * rpr0521_set_power_state - handles runtime PM state and sensors enabled status
+ *
+ * @data: rpr0521 device private data
+ * @on: state to be set for devices in @device_mask
+ * @device_mask: bitmask specifying for which device we need to update @on state
+ *
+ * Calls for this function must be balanced so that each ON should have matching
+ * OFF. Otherwise pm usage_count gets out of sync.
+ */
+static int rpr0521_set_power_state(struct rpr0521_data *data, bool on,
+ u8 device_mask)
+{
+#ifdef CONFIG_PM
+ int ret;
+
+ if (device_mask & RPR0521_MODE_ALS_MASK) {
+ data->als_ps_need_en = on;
+ data->als_need_dis = !on;
+ }
+
+ if (device_mask & RPR0521_MODE_PXS_MASK) {
+ data->pxs_ps_need_en = on;
+ data->pxs_need_dis = !on;
+ }
+
+ /*
+ * On: _resume() is called only when we are suspended
+ * Off: _suspend() is called after delay if _resume() is not
+ * called before that.
+ * Note: If either measurement is re-enabled before _suspend(),
+ * both stay enabled until _suspend().
+ */
+ if (on) {
+ ret = pm_runtime_get_sync(&data->client->dev);
+ } else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "Failed: rpr0521_set_power_state for %d, ret %d\n",
+ on, ret);
+ if (on)
+ pm_runtime_put_noidle(&data->client->dev);
+
+ return ret;
+ }
+
+ if (on) {
+ /* If _resume() was not called, enable measurement now. */
+ if (data->als_ps_need_en) {
+ ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
+ if (ret)
+ return ret;
+ data->als_ps_need_en = false;
+ }
+
+ if (data->pxs_ps_need_en) {
+ ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
+ if (ret)
+ return ret;
+ data->pxs_ps_need_en = false;
+ }
+ }
+#endif
+ return 0;
+}
+
+/* Interrupt register tells if this sensor caused the interrupt or not. */
+static inline bool rpr0521_is_triggered(struct rpr0521_data *data)
+{
+ int ret;
+ int reg;
+
+ ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, ®);
+ if (ret < 0)
+ return false; /* Reg read failed. */
+ if (reg &
+ (RPR0521_INTERRUPT_ALS_INT_STATUS_MASK |
+ RPR0521_INTERRUPT_PS_INT_STATUS_MASK))
+ return true;
+ else
+ return false; /* Int not from this sensor. */
+}
+
+/* IRQ to trigger handler */
+static irqreturn_t rpr0521_drdy_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct rpr0521_data *data = iio_priv(indio_dev);
+
+ data->irq_timestamp = iio_get_time_ns(indio_dev);
+ /*
+ * We need to wake the thread to read the interrupt reg. It
+ * is not possible to do that here because regmap_read takes a
+ * mutex.
+ */
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t rpr0521_drdy_irq_thread(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct rpr0521_data *data = iio_priv(indio_dev);
+
+ if (rpr0521_is_triggered(data)) {
+ iio_trigger_poll_chained(data->drdy_trigger0);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static irqreturn_t rpr0521_trigger_consumer_store_time(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+
+ /* Other trigger polls store time here. */
+ if (!iio_trigger_using_own(indio_dev))
+ pf->timestamp = iio_get_time_ns(indio_dev);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t rpr0521_trigger_consumer_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int err;
+
+ u8 buffer[16]; /* 3 16-bit channels + padding + ts */
+
+ /* Use irq timestamp when reasonable. */
+ if (iio_trigger_using_own(indio_dev) && data->irq_timestamp) {
+ pf->timestamp = data->irq_timestamp;
+ data->irq_timestamp = 0;
+ }
+ /* Other chained trigger polls get timestamp only here. */
+ if (!pf->timestamp)
+ pf->timestamp = iio_get_time_ns(indio_dev);
+
+ err = regmap_bulk_read(data->regmap, RPR0521_REG_PXS_DATA,
+ &buffer,
+ (3 * 2) + 1); /* 3 * 16-bit + (discarded) int clear reg. */
+ if (!err)
+ iio_push_to_buffers_with_timestamp(indio_dev,
+ buffer, pf->timestamp);
+ else
+ dev_err(&data->client->dev,
+ "Trigger consumer can't read from sensor.\n");
+ pf->timestamp = 0;
+
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int rpr0521_write_int_enable(struct rpr0521_data *data)
+{
+ int err;
+
+ /* Interrupt after each measurement */
+ err = regmap_update_bits(data->regmap, RPR0521_REG_PXS_CTRL,
+ RPR0521_PXS_PERSISTENCE_MASK,
+ RPR0521_PXS_PERSISTENCE_DRDY);
+ if (err) {
+ dev_err(&data->client->dev, "PS control reg write fail.\n");
+ return -EBUSY;
+ }
+
+ /* Ignore latch and mode because of drdy */
+ err = regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
+ RPR0521_INTERRUPT_INT_REASSERT_DISABLE |
+ RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
+ RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE
+ );
+ if (err) {
+ dev_err(&data->client->dev, "Interrupt setup write fail.\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+static int rpr0521_write_int_disable(struct rpr0521_data *data)
+{
+ /* Don't care of clearing mode, assert and latch. */
+ return regmap_write(data->regmap, RPR0521_REG_INTERRUPT,
+ RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE |
+ RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE
+ );
+}
+
+/*
+ * Trigger producer enable / disable. Note that there will be trigs only when
+ * measurement data is ready to be read.
+ */
+static int rpr0521_pxs_drdy_set_state(struct iio_trigger *trigger,
+ bool enable_drdy)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger);
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int err;
+
+ if (enable_drdy)
+ err = rpr0521_write_int_enable(data);
+ else
+ err = rpr0521_write_int_disable(data);
+ if (err)
+ dev_err(&data->client->dev, "rpr0521_pxs_drdy_set_state failed\n");
+
+ return err;
+}
+
+static const struct iio_trigger_ops rpr0521_trigger_ops = {
+ .set_trigger_state = rpr0521_pxs_drdy_set_state,
+ };
+
+
+static int rpr0521_buffer_preenable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct rpr0521_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->lock);
+ err = rpr0521_set_power_state(data, true,
+ (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
+ mutex_unlock(&data->lock);
+ if (err)
+ dev_err(&data->client->dev, "_buffer_preenable fail\n");
+
+ return err;
+}
+
+static int rpr0521_buffer_postdisable(struct iio_dev *indio_dev)
+{
+ int err;
+ struct rpr0521_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->lock);
+ err = rpr0521_set_power_state(data, false,
+ (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK));
+ mutex_unlock(&data->lock);
+ if (err)
+ dev_err(&data->client->dev, "_buffer_postdisable fail\n");
+
+ return err;
+}
+
+static const struct iio_buffer_setup_ops rpr0521_buffer_setup_ops = {
+ .preenable = rpr0521_buffer_preenable,
+ .postenable = iio_triggered_buffer_postenable,
+ .predisable = iio_triggered_buffer_predisable,
+ .postdisable = rpr0521_buffer_postdisable,
+};
+
+static int rpr0521_get_gain(struct rpr0521_data *data, int chan,
+ int *val, int *val2)
+{
+ int ret, reg, idx;
+
+ ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®);
+ if (ret < 0)
+ return ret;
+
+ idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift;
+ *val = rpr0521_gain[chan].gain[idx].scale;
+ *val2 = rpr0521_gain[chan].gain[idx].uscale;
+
+ return 0;
+}
+
+static int rpr0521_set_gain(struct rpr0521_data *data, int chan,
+ int val, int val2)
+{
+ int i, idx = -EINVAL;
+
+ /* get gain index */
+ for (i = 0; i < rpr0521_gain[chan].size; i++)
+ if (val == rpr0521_gain[chan].gain[i].scale &&
+ val2 == rpr0521_gain[chan].gain[i].uscale) {
+ idx = i;
+ break;
+ }
+
+ if (idx < 0)
+ return idx;
+
+ return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg,
+ rpr0521_gain[chan].mask,
+ idx << rpr0521_gain[chan].shift);
+}
+
+static int rpr0521_read_samp_freq(struct rpr0521_data *data,
+ enum iio_chan_type chan_type,
+ int *val, int *val2)
+{
+ int reg, ret;
+
+ ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®);
+ if (ret < 0)
+ return ret;
+
+ reg &= RPR0521_MODE_MEAS_TIME_MASK;
+ if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i))
+ return -EINVAL;
+
+ switch (chan_type) {
+ case IIO_INTENSITY:
+ *val = rpr0521_samp_freq_i[reg].als_hz;
+ *val2 = rpr0521_samp_freq_i[reg].als_uhz;
+ return 0;
+
+ case IIO_PROXIMITY:
+ *val = rpr0521_samp_freq_i[reg].pxs_hz;
+ *val2 = rpr0521_samp_freq_i[reg].pxs_uhz;
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rpr0521_write_samp_freq_common(struct rpr0521_data *data,
+ enum iio_chan_type chan_type,
+ int val, int val2)
+{
+ int i;
+
+ /*
+ * Ignore channel
+ * both pxs and als are setup only to same freq because of simplicity
+ */
+ switch (val) {
+ case 0:
+ i = 0;
+ break;
+
+ case 2:
+ if (val2 != 500000)
+ return -EINVAL;
+
+ i = 11;
+ break;
+
+ case 10:
+ i = 6;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(data->regmap,
+ RPR0521_REG_MODE_CTRL,
+ RPR0521_MODE_MEAS_TIME_MASK,
+ i);
+}
+
+static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset)
+{
+ int ret;
+ __le16 buffer;
+
+ ret = regmap_bulk_read(data->regmap,
+ RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
+
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Failed to read PS OFFSET register\n");
+ return ret;
+ }
+ *offset = le16_to_cpu(buffer);
+
+ return ret;
+}
+
+static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset)
+{
+ int ret;
+ __le16 buffer;
+
+ buffer = cpu_to_le16(offset & 0x3ff);
+ ret = regmap_raw_write(data->regmap,
+ RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer));
+
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Failed to write PS OFFSET register\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int rpr0521_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int ret;
+ int busy;
+ u8 device_mask;
+ __le16 raw_data;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ busy = iio_device_claim_direct_mode(indio_dev);
+ if (busy)
+ return -EBUSY;
+
+ device_mask = rpr0521_data_reg[chan->address].device_mask;
+
+ mutex_lock(&data->lock);
+ ret = rpr0521_set_power_state(data, true, device_mask);
+ if (ret < 0)
+ goto rpr0521_read_raw_out;
+
+ ret = regmap_bulk_read(data->regmap,
+ rpr0521_data_reg[chan->address].address,
+ &raw_data, sizeof(raw_data));
+ if (ret < 0) {
+ rpr0521_set_power_state(data, false, device_mask);
+ goto rpr0521_read_raw_out;
+ }
+
+ ret = rpr0521_set_power_state(data, false, device_mask);
+
+rpr0521_read_raw_out:
+ mutex_unlock(&data->lock);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ *val = le16_to_cpu(raw_data);
+
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ mutex_lock(&data->lock);
+ ret = rpr0521_get_gain(data, chan->address, val, val2);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->lock);
+ ret = rpr0521_read_samp_freq(data, chan->type, val, val2);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ case IIO_CHAN_INFO_OFFSET:
+ mutex_lock(&data->lock);
+ ret = rpr0521_read_ps_offset(data, val);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rpr0521_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ mutex_lock(&data->lock);
+ ret = rpr0521_set_gain(data, chan->address, val, val2);
+ mutex_unlock(&data->lock);
+
+ return ret;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->lock);
+ ret = rpr0521_write_samp_freq_common(data, chan->type,
+ val, val2);
+ mutex_unlock(&data->lock);
+
+ return ret;
+
+ case IIO_CHAN_INFO_OFFSET:
+ mutex_lock(&data->lock);
+ ret = rpr0521_write_ps_offset(data, val);
+ mutex_unlock(&data->lock);
+
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info rpr0521_info = {
+ .read_raw = rpr0521_read_raw,
+ .write_raw = rpr0521_write_raw,
+ .attrs = &rpr0521_attribute_group,
+};
+
+static int rpr0521_init(struct rpr0521_data *data)
+{
+ int ret;
+ int id;
+
+ ret = regmap_read(data->regmap, RPR0521_REG_ID, &id);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Failed to read REG_ID register\n");
+ return ret;
+ }
+
+ if (id != RPR0521_MANUFACT_ID) {
+ dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n",
+ id, RPR0521_MANUFACT_ID);
+ return -ENODEV;
+ }
+
+ /* set default measurement time - 100 ms for both ALS and PS */
+ ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
+ RPR0521_MODE_MEAS_TIME_MASK,
+ RPR0521_DEFAULT_MEAS_TIME);
+ if (ret) {
+ pr_err("regmap_update_bits returned %d\n", ret);
+ return ret;
+ }
+
+#ifndef CONFIG_PM
+ ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
+ if (ret < 0)
+ return ret;
+ ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
+ if (ret < 0)
+ return ret;
+#endif
+
+ data->irq_timestamp = 0;
+
+ return 0;
+}
+
+static int rpr0521_poweroff(struct rpr0521_data *data)
+{
+ int ret;
+ int tmp;
+
+ ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL,
+ RPR0521_MODE_ALS_MASK |
+ RPR0521_MODE_PXS_MASK,
+ RPR0521_MODE_ALS_DISABLE |
+ RPR0521_MODE_PXS_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ data->als_dev_en = false;
+ data->pxs_dev_en = false;
+
+ /*
+ * Int pin keeps state after power off. Set pin to high impedance
+ * mode to prevent power drain.
+ */
+ ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, &tmp);
+ if (ret) {
+ dev_err(&data->client->dev, "Failed to reset int pin.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case RPR0521_REG_MODE_CTRL:
+ case RPR0521_REG_ALS_CTRL:
+ case RPR0521_REG_PXS_CTRL:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static const struct regmap_config rpr0521_regmap_config = {
+ .name = RPR0521_REGMAP_NAME,
+
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = RPR0521_REG_ID,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = rpr0521_is_volatile_reg,
+};
+
+static int rpr0521_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct rpr0521_data *data;
+ struct iio_dev *indio_dev;
+ struct regmap *regmap;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "regmap_init failed!\n");
+ return PTR_ERR(regmap);
+ }
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->regmap = regmap;
+
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &rpr0521_info;
+ indio_dev->name = RPR0521_DRV_NAME;
+ indio_dev->channels = rpr0521_channels;
+ indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = rpr0521_init(data);
+ if (ret < 0) {
+ dev_err(&client->dev, "rpr0521 chip init failed\n");
+ return ret;
+ }
+
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto err_poweroff;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ /*
+ * If sensor write/read is needed in _probe after _use_autosuspend,
+ * sensor needs to be _resumed first using rpr0521_set_power_state().
+ */
+
+ /* IRQ to trigger setup */
+ if (client->irq) {
+ /* Trigger0 producer setup */
+ data->drdy_trigger0 = devm_iio_trigger_alloc(
+ indio_dev->dev.parent,
+ "%s-dev%d", indio_dev->name, indio_dev->id);
+ if (!data->drdy_trigger0) {
+ ret = -ENOMEM;
+ goto err_pm_disable;
+ }
+ data->drdy_trigger0->dev.parent = indio_dev->dev.parent;
+ data->drdy_trigger0->ops = &rpr0521_trigger_ops;
+ indio_dev->available_scan_masks = rpr0521_available_scan_masks;
+ iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev);
+
+ /* Ties irq to trigger producer handler. */
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ rpr0521_drdy_irq_handler, rpr0521_drdy_irq_thread,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ RPR0521_IRQ_NAME, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "request irq %d for trigger0 failed\n",
+ client->irq);
+ goto err_pm_disable;
+ }
+
+ ret = devm_iio_trigger_register(indio_dev->dev.parent,
+ data->drdy_trigger0);
+ if (ret) {
+ dev_err(&client->dev, "iio trigger register failed\n");
+ goto err_pm_disable;
+ }
+
+ /*
+ * Now whole pipe from physical interrupt (irq defined by
+ * devicetree to device) to trigger0 output is set up.
+ */
+
+ /* Trigger consumer setup */
+ ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent,
+ indio_dev,
+ rpr0521_trigger_consumer_store_time,
+ rpr0521_trigger_consumer_handler,
+ &rpr0521_buffer_setup_ops);
+ if (ret < 0) {
+ dev_err(&client->dev, "iio triggered buffer setup failed\n");
+ goto err_pm_disable;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto err_pm_disable;
+
+ return 0;
+
+err_pm_disable:
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+err_poweroff:
+ rpr0521_poweroff(data);
+
+ return ret;
+}
+
+static int rpr0521_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ rpr0521_poweroff(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int rpr0521_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->lock);
+ /* If measurements are enabled, enable them on resume */
+ if (!data->als_need_dis)
+ data->als_ps_need_en = data->als_dev_en;
+ if (!data->pxs_need_dis)
+ data->pxs_ps_need_en = data->pxs_dev_en;
+
+ /* disable channels and sets {als,pxs}_dev_en to false */
+ ret = rpr0521_poweroff(data);
+ regcache_mark_dirty(data->regmap);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int rpr0521_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct rpr0521_data *data = iio_priv(indio_dev);
+ int ret;
+
+ regcache_sync(data->regmap);
+ if (data->als_ps_need_en) {
+ ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE);
+ if (ret < 0)
+ return ret;
+ data->als_ps_need_en = false;
+ }
+
+ if (data->pxs_ps_need_en) {
+ ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE);
+ if (ret < 0)
+ return ret;
+ data->pxs_ps_need_en = false;
+ }
+ msleep(100); //wait for first measurement result
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops rpr0521_pm_ops = {
+ SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend,
+ rpr0521_runtime_resume, NULL)
+};
+
+static const struct acpi_device_id rpr0521_acpi_match[] = {
+ {"RPR0521", 0},
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match);
+
+static const struct i2c_device_id rpr0521_id[] = {
+ {"rpr0521", 0},
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, rpr0521_id);
+
+static struct i2c_driver rpr0521_driver = {
+ .driver = {
+ .name = RPR0521_DRV_NAME,
+ .pm = &rpr0521_pm_ops,
+ .acpi_match_table = ACPI_PTR(rpr0521_acpi_match),
+ },
+ .probe = rpr0521_probe,
+ .remove = rpr0521_remove,
+ .id_table = rpr0521_id,
+};
+
+module_i2c_driver(rpr0521_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
+MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c
new file mode 100644
index 0000000..015a21f
--- /dev/null
+++ b/drivers/iio/light/si1133.c
@@ -0,0 +1,1071 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * si1133.c - Support for Silabs SI1133 combined ambient
+ * light and UV index sensors
+ *
+ * Copyright 2018 Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#include <linux/util_macros.h>
+
+#define SI1133_REG_PART_ID 0x00
+#define SI1133_REG_REV_ID 0x01
+#define SI1133_REG_MFR_ID 0x02
+#define SI1133_REG_INFO0 0x03
+#define SI1133_REG_INFO1 0x04
+
+#define SI1133_PART_ID 0x33
+
+#define SI1133_REG_HOSTIN0 0x0A
+#define SI1133_REG_COMMAND 0x0B
+#define SI1133_REG_IRQ_ENABLE 0x0F
+#define SI1133_REG_RESPONSE1 0x10
+#define SI1133_REG_RESPONSE0 0x11
+#define SI1133_REG_IRQ_STATUS 0x12
+#define SI1133_REG_MEAS_RATE 0x1A
+
+#define SI1133_IRQ_CHANNEL_ENABLE 0xF
+
+#define SI1133_CMD_RESET_CTR 0x00
+#define SI1133_CMD_RESET_SW 0x01
+#define SI1133_CMD_FORCE 0x11
+#define SI1133_CMD_START_AUTONOMOUS 0x13
+#define SI1133_CMD_PARAM_SET 0x80
+#define SI1133_CMD_PARAM_QUERY 0x40
+#define SI1133_CMD_PARAM_MASK 0x3F
+
+#define SI1133_CMD_ERR_MASK BIT(4)
+#define SI1133_CMD_SEQ_MASK 0xF
+#define SI1133_MAX_CMD_CTR 0xF
+
+#define SI1133_PARAM_REG_CHAN_LIST 0x01
+#define SI1133_PARAM_REG_ADCCONFIG(x) ((x) * 4) + 2
+#define SI1133_PARAM_REG_ADCSENS(x) ((x) * 4) + 3
+#define SI1133_PARAM_REG_ADCPOST(x) ((x) * 4) + 4
+
+#define SI1133_ADCMUX_MASK 0x1F
+
+#define SI1133_ADCCONFIG_DECIM_RATE(x) (x) << 5
+
+#define SI1133_ADCSENS_SCALE_MASK 0x70
+#define SI1133_ADCSENS_SCALE_SHIFT 4
+#define SI1133_ADCSENS_HSIG_MASK BIT(7)
+#define SI1133_ADCSENS_HSIG_SHIFT 7
+#define SI1133_ADCSENS_HW_GAIN_MASK 0xF
+#define SI1133_ADCSENS_NB_MEAS(x) fls(x) << SI1133_ADCSENS_SCALE_SHIFT
+
+#define SI1133_ADCPOST_24BIT_EN BIT(6)
+#define SI1133_ADCPOST_POSTSHIFT_BITQTY(x) (x & GENMASK(2, 0)) << 3
+
+#define SI1133_PARAM_ADCMUX_SMALL_IR 0x0
+#define SI1133_PARAM_ADCMUX_MED_IR 0x1
+#define SI1133_PARAM_ADCMUX_LARGE_IR 0x2
+#define SI1133_PARAM_ADCMUX_WHITE 0xB
+#define SI1133_PARAM_ADCMUX_LARGE_WHITE 0xD
+#define SI1133_PARAM_ADCMUX_UV 0x18
+#define SI1133_PARAM_ADCMUX_UV_DEEP 0x19
+
+#define SI1133_ERR_INVALID_CMD 0x0
+#define SI1133_ERR_INVALID_LOCATION_CMD 0x1
+#define SI1133_ERR_SATURATION_ADC_OR_OVERFLOW_ACCUMULATION 0x2
+#define SI1133_ERR_OUTPUT_BUFFER_OVERFLOW 0x3
+
+#define SI1133_COMPLETION_TIMEOUT_MS 500
+
+#define SI1133_CMD_MINSLEEP_US_LOW 5000
+#define SI1133_CMD_MINSLEEP_US_HIGH 7500
+#define SI1133_CMD_TIMEOUT_MS 25
+#define SI1133_CMD_LUX_TIMEOUT_MS 5000
+#define SI1133_CMD_TIMEOUT_US SI1133_CMD_TIMEOUT_MS * 1000
+
+#define SI1133_REG_HOSTOUT(x) (x) + 0x13
+
+#define SI1133_MEASUREMENT_FREQUENCY 1250
+
+#define SI1133_X_ORDER_MASK 0x0070
+#define SI1133_Y_ORDER_MASK 0x0007
+#define si1133_get_x_order(m) ((m) & SI1133_X_ORDER_MASK) >> 4
+#define si1133_get_y_order(m) ((m) & SI1133_Y_ORDER_MASK)
+
+#define SI1133_LUX_ADC_MASK 0xE
+#define SI1133_ADC_THRESHOLD 16000
+#define SI1133_INPUT_FRACTION_HIGH 7
+#define SI1133_INPUT_FRACTION_LOW 15
+#define SI1133_LUX_OUTPUT_FRACTION 12
+#define SI1133_LUX_BUFFER_SIZE 9
+
+static const int si1133_scale_available[] = {
+ 1, 2, 4, 8, 16, 32, 64, 128};
+
+static IIO_CONST_ATTR(scale_available, "1 2 4 8 16 32 64 128");
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.0244 0.0488 0.0975 0.195 0.390 0.780 "
+ "1.560 3.120 6.24 12.48 25.0 50.0");
+
+/* A.K.A. HW_GAIN in datasheet */
+enum si1133_int_time {
+ _24_4_us = 0,
+ _48_8_us = 1,
+ _97_5_us = 2,
+ _195_0_us = 3,
+ _390_0_us = 4,
+ _780_0_us = 5,
+ _1_560_0_us = 6,
+ _3_120_0_us = 7,
+ _6_240_0_us = 8,
+ _12_480_0_us = 9,
+ _25_ms = 10,
+ _50_ms = 11,
+};
+
+/* Integration time in milliseconds, nanoseconds */
+static const int si1133_int_time_table[][2] = {
+ [_24_4_us] = {0, 24400},
+ [_48_8_us] = {0, 48800},
+ [_97_5_us] = {0, 97500},
+ [_195_0_us] = {0, 195000},
+ [_390_0_us] = {0, 390000},
+ [_780_0_us] = {0, 780000},
+ [_1_560_0_us] = {1, 560000},
+ [_3_120_0_us] = {3, 120000},
+ [_6_240_0_us] = {6, 240000},
+ [_12_480_0_us] = {12, 480000},
+ [_25_ms] = {25, 000000},
+ [_50_ms] = {50, 000000},
+};
+
+static const struct regmap_range si1133_reg_ranges[] = {
+ regmap_reg_range(0x00, 0x02),
+ regmap_reg_range(0x0A, 0x0B),
+ regmap_reg_range(0x0F, 0x0F),
+ regmap_reg_range(0x10, 0x12),
+ regmap_reg_range(0x13, 0x2C),
+};
+
+static const struct regmap_range si1133_reg_ro_ranges[] = {
+ regmap_reg_range(0x00, 0x02),
+ regmap_reg_range(0x10, 0x2C),
+};
+
+static const struct regmap_range si1133_precious_ranges[] = {
+ regmap_reg_range(0x12, 0x12),
+};
+
+static const struct regmap_access_table si1133_write_ranges_table = {
+ .yes_ranges = si1133_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_reg_ranges),
+ .no_ranges = si1133_reg_ro_ranges,
+ .n_no_ranges = ARRAY_SIZE(si1133_reg_ro_ranges),
+};
+
+static const struct regmap_access_table si1133_read_ranges_table = {
+ .yes_ranges = si1133_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_reg_ranges),
+};
+
+static const struct regmap_access_table si1133_precious_table = {
+ .yes_ranges = si1133_precious_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_precious_ranges),
+};
+
+static const struct regmap_config si1133_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0x2C,
+
+ .wr_table = &si1133_write_ranges_table,
+ .rd_table = &si1133_read_ranges_table,
+
+ .precious_table = &si1133_precious_table,
+};
+
+struct si1133_data {
+ struct regmap *regmap;
+ struct i2c_client *client;
+
+ /* Lock protecting one command at a time can be processed */
+ struct mutex mutex;
+
+ int rsp_seq;
+ u8 scan_mask;
+ u8 adc_sens[6];
+ u8 adc_config[6];
+
+ struct completion completion;
+};
+
+struct si1133_coeff {
+ s16 info;
+ u16 mag;
+};
+
+struct si1133_lux_coeff {
+ struct si1133_coeff coeff_high[4];
+ struct si1133_coeff coeff_low[9];
+};
+
+static const struct si1133_lux_coeff lux_coeff = {
+ {
+ { 0, 209},
+ { 1665, 93},
+ { 2064, 65},
+ {-2671, 234}
+ },
+ {
+ { 0, 0},
+ { 1921, 29053},
+ {-1022, 36363},
+ { 2320, 20789},
+ { -367, 57909},
+ {-1774, 38240},
+ { -608, 46775},
+ {-1503, 51831},
+ {-1886, 58928}
+ }
+};
+
+static int si1133_calculate_polynomial_inner(u32 input, u8 fraction, u16 mag,
+ s8 shift)
+{
+ return ((input << fraction) / mag) << shift;
+}
+
+static int si1133_calculate_output(u32 x, u32 y, u8 x_order, u8 y_order,
+ u8 input_fraction, s8 sign,
+ const struct si1133_coeff *coeffs)
+{
+ s8 shift;
+ int x1 = 1;
+ int x2 = 1;
+ int y1 = 1;
+ int y2 = 1;
+
+ shift = ((u16)coeffs->info & 0xFF00) >> 8;
+ shift ^= 0xFF;
+ shift += 1;
+ shift = -shift;
+
+ if (x_order > 0) {
+ x1 = si1133_calculate_polynomial_inner(x, input_fraction,
+ coeffs->mag, shift);
+ if (x_order > 1)
+ x2 = x1;
+ }
+
+ if (y_order > 0) {
+ y1 = si1133_calculate_polynomial_inner(y, input_fraction,
+ coeffs->mag, shift);
+ if (y_order > 1)
+ y2 = y1;
+ }
+
+ return sign * x1 * x2 * y1 * y2;
+}
+
+/*
+ * The algorithm is from:
+ * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00716
+ */
+static int si1133_calc_polynomial(u32 x, u32 y, u8 input_fraction, u8 num_coeff,
+ const struct si1133_coeff *coeffs)
+{
+ u8 x_order, y_order;
+ u8 counter;
+ s8 sign;
+ int output = 0;
+
+ for (counter = 0; counter < num_coeff; counter++) {
+ if (coeffs->info < 0)
+ sign = -1;
+ else
+ sign = 1;
+
+ x_order = si1133_get_x_order(coeffs->info);
+ y_order = si1133_get_y_order(coeffs->info);
+
+ if ((x_order == 0) && (y_order == 0))
+ output +=
+ sign * coeffs->mag << SI1133_LUX_OUTPUT_FRACTION;
+ else
+ output += si1133_calculate_output(x, y, x_order,
+ y_order,
+ input_fraction, sign,
+ coeffs);
+ coeffs++;
+ }
+
+ return abs(output);
+}
+
+static int si1133_cmd_reset_sw(struct si1133_data *data)
+{
+ struct device *dev = &data->client->dev;
+ unsigned int resp;
+ unsigned long timeout;
+ int err;
+
+ err = regmap_write(data->regmap, SI1133_REG_COMMAND,
+ SI1133_CMD_RESET_SW);
+ if (err)
+ return err;
+
+ timeout = jiffies + msecs_to_jiffies(SI1133_CMD_TIMEOUT_MS);
+ while (true) {
+ err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);
+ if (err == -ENXIO) {
+ usleep_range(SI1133_CMD_MINSLEEP_US_LOW,
+ SI1133_CMD_MINSLEEP_US_HIGH);
+ continue;
+ }
+
+ if ((resp & SI1133_MAX_CMD_CTR) == SI1133_MAX_CMD_CTR)
+ break;
+
+ if (time_after(jiffies, timeout)) {
+ dev_warn(dev, "Timeout on reset ctr resp: %d\n", resp);
+ return -ETIMEDOUT;
+ }
+ }
+
+ if (!err)
+ data->rsp_seq = SI1133_MAX_CMD_CTR;
+
+ return err;
+}
+
+static int si1133_parse_response_err(struct device *dev, u32 resp, u8 cmd)
+{
+ resp &= 0xF;
+
+ switch (resp) {
+ case SI1133_ERR_OUTPUT_BUFFER_OVERFLOW:
+ dev_warn(dev, "Output buffer overflow: %#02hhx\n", cmd);
+ return -EOVERFLOW;
+ case SI1133_ERR_SATURATION_ADC_OR_OVERFLOW_ACCUMULATION:
+ dev_warn(dev, "Saturation of the ADC or overflow of accumulation: %#02hhx\n",
+ cmd);
+ return -EOVERFLOW;
+ case SI1133_ERR_INVALID_LOCATION_CMD:
+ dev_warn(dev,
+ "Parameter access to an invalid location: %#02hhx\n",
+ cmd);
+ return -EINVAL;
+ case SI1133_ERR_INVALID_CMD:
+ dev_warn(dev, "Invalid command %#02hhx\n", cmd);
+ return -EINVAL;
+ default:
+ dev_warn(dev, "Unknown error %#02hhx\n", cmd);
+ return -EINVAL;
+ }
+}
+
+static int si1133_cmd_reset_counter(struct si1133_data *data)
+{
+ int err = regmap_write(data->regmap, SI1133_REG_COMMAND,
+ SI1133_CMD_RESET_CTR);
+ if (err)
+ return err;
+
+ data->rsp_seq = 0;
+
+ return 0;
+}
+
+static int si1133_command(struct si1133_data *data, u8 cmd)
+{
+ struct device *dev = &data->client->dev;
+ u32 resp;
+ int err;
+ int expected_seq;
+
+ mutex_lock(&data->mutex);
+
+ expected_seq = (data->rsp_seq + 1) & SI1133_MAX_CMD_CTR;
+
+ if (cmd == SI1133_CMD_FORCE)
+ reinit_completion(&data->completion);
+
+ err = regmap_write(data->regmap, SI1133_REG_COMMAND, cmd);
+ if (err) {
+ dev_warn(dev, "Failed to write command %#02hhx, ret=%d\n", cmd,
+ err);
+ goto out;
+ }
+
+ if (cmd == SI1133_CMD_FORCE) {
+ /* wait for irq */
+ if (!wait_for_completion_timeout(&data->completion,
+ msecs_to_jiffies(SI1133_COMPLETION_TIMEOUT_MS))) {
+ err = -ETIMEDOUT;
+ goto out;
+ }
+ err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);
+ if (err)
+ goto out;
+ } else {
+ err = regmap_read_poll_timeout(data->regmap,
+ SI1133_REG_RESPONSE0, resp,
+ (resp & SI1133_CMD_SEQ_MASK) ==
+ expected_seq ||
+ (resp & SI1133_CMD_ERR_MASK),
+ SI1133_CMD_MINSLEEP_US_LOW,
+ SI1133_CMD_TIMEOUT_MS * 1000);
+ if (err) {
+ dev_warn(dev,
+ "Failed to read command %#02hhx, ret=%d\n",
+ cmd, err);
+ goto out;
+ }
+ }
+
+ if (resp & SI1133_CMD_ERR_MASK) {
+ err = si1133_parse_response_err(dev, resp, cmd);
+ si1133_cmd_reset_counter(data);
+ } else {
+ data->rsp_seq = expected_seq;
+ }
+
+out:
+ mutex_unlock(&data->mutex);
+
+ return err;
+}
+
+static int si1133_param_set(struct si1133_data *data, u8 param, u32 value)
+{
+ int err = regmap_write(data->regmap, SI1133_REG_HOSTIN0, value);
+
+ if (err)
+ return err;
+
+ return si1133_command(data, SI1133_CMD_PARAM_SET |
+ (param & SI1133_CMD_PARAM_MASK));
+}
+
+static int si1133_param_query(struct si1133_data *data, u8 param, u32 *result)
+{
+ int err = si1133_command(data, SI1133_CMD_PARAM_QUERY |
+ (param & SI1133_CMD_PARAM_MASK));
+ if (err)
+ return err;
+
+ return regmap_read(data->regmap, SI1133_REG_RESPONSE1, result);
+}
+
+#define SI1133_CHANNEL(_ch, _type) \
+ .type = _type, \
+ .channel = _ch, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN), \
+
+static const struct iio_chan_spec si1133_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ .channel = 0,
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_WHITE, IIO_INTENSITY)
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_LARGE_WHITE, IIO_INTENSITY)
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .extend_name = "large",
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_SMALL_IR, IIO_INTENSITY)
+ .extend_name = "small",
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_MED_IR, IIO_INTENSITY)
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_LARGE_IR, IIO_INTENSITY)
+ .extend_name = "large",
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_UV, IIO_UVINDEX)
+ },
+ {
+ SI1133_CHANNEL(SI1133_PARAM_ADCMUX_UV_DEEP, IIO_UVINDEX)
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_DUV,
+ }
+};
+
+static int si1133_get_int_time_index(int milliseconds, int nanoseconds)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(si1133_int_time_table); i++) {
+ if (milliseconds == si1133_int_time_table[i][0] &&
+ nanoseconds == si1133_int_time_table[i][1])
+ return i;
+ }
+ return -EINVAL;
+}
+
+static int si1133_set_integration_time(struct si1133_data *data, u8 adc,
+ int milliseconds, int nanoseconds)
+{
+ int index;
+
+ index = si1133_get_int_time_index(milliseconds, nanoseconds);
+ if (index < 0)
+ return index;
+
+ data->adc_sens[adc] &= 0xF0;
+ data->adc_sens[adc] |= index;
+
+ return si1133_param_set(data, SI1133_PARAM_REG_ADCSENS(0),
+ data->adc_sens[adc]);
+}
+
+static int si1133_set_chlist(struct si1133_data *data, u8 scan_mask)
+{
+ /* channel list already set, no need to reprogram */
+ if (data->scan_mask == scan_mask)
+ return 0;
+
+ data->scan_mask = scan_mask;
+
+ return si1133_param_set(data, SI1133_PARAM_REG_CHAN_LIST, scan_mask);
+}
+
+static int si1133_chan_set_adcconfig(struct si1133_data *data, u8 adc,
+ u8 adc_config)
+{
+ int err;
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCCONFIG(adc),
+ adc_config);
+ if (err)
+ return err;
+
+ data->adc_config[adc] = adc_config;
+
+ return 0;
+}
+
+static int si1133_update_adcconfig(struct si1133_data *data, uint8_t adc,
+ u8 mask, u8 shift, u8 value)
+{
+ u32 adc_config;
+ int err;
+
+ err = si1133_param_query(data, SI1133_PARAM_REG_ADCCONFIG(adc),
+ &adc_config);
+ if (err)
+ return err;
+
+ adc_config &= ~mask;
+ adc_config |= (value << shift);
+
+ return si1133_chan_set_adcconfig(data, adc, adc_config);
+}
+
+static int si1133_set_adcmux(struct si1133_data *data, u8 adc, u8 mux)
+{
+ if ((mux & data->adc_config[adc]) == mux)
+ return 0; /* mux already set to correct value */
+
+ return si1133_update_adcconfig(data, adc, SI1133_ADCMUX_MASK, 0, mux);
+}
+
+static int si1133_force_measurement(struct si1133_data *data)
+{
+ return si1133_command(data, SI1133_CMD_FORCE);
+}
+
+static int si1133_bulk_read(struct si1133_data *data, u8 start_reg, u8 length,
+ u8 *buffer)
+{
+ int err;
+
+ err = si1133_force_measurement(data);
+ if (err)
+ return err;
+
+ return regmap_bulk_read(data->regmap, start_reg, buffer, length);
+}
+
+static int si1133_measure(struct si1133_data *data,
+ struct iio_chan_spec const *chan,
+ int *val)
+{
+ int err;
+
+ __be16 resp;
+
+ err = si1133_set_adcmux(data, 0, chan->channel);
+ if (err)
+ return err;
+
+ /* Deactivate lux measurements if they were active */
+ err = si1133_set_chlist(data, BIT(0));
+ if (err)
+ return err;
+
+ err = si1133_bulk_read(data, SI1133_REG_HOSTOUT(0), sizeof(resp),
+ (u8 *)&resp);
+ if (err)
+ return err;
+
+ *val = be16_to_cpu(resp);
+
+ return err;
+}
+
+static irqreturn_t si1133_threaded_irq_handler(int irq, void *private)
+{
+ struct iio_dev *iio_dev = private;
+ struct si1133_data *data = iio_priv(iio_dev);
+ u32 irq_status;
+ int err;
+
+ err = regmap_read(data->regmap, SI1133_REG_IRQ_STATUS, &irq_status);
+ if (err) {
+ dev_err_ratelimited(&iio_dev->dev, "Error reading IRQ\n");
+ goto out;
+ }
+
+ if (irq_status != data->scan_mask)
+ return IRQ_NONE;
+
+out:
+ complete(&data->completion);
+
+ return IRQ_HANDLED;
+}
+
+static int si1133_scale_to_swgain(int scale_integer, int scale_fractional)
+{
+ scale_integer = find_closest(scale_integer, si1133_scale_available,
+ ARRAY_SIZE(si1133_scale_available));
+ if (scale_integer < 0 ||
+ scale_integer > ARRAY_SIZE(si1133_scale_available) ||
+ scale_fractional != 0)
+ return -EINVAL;
+
+ return scale_integer;
+}
+
+static int si1133_chan_set_adcsens(struct si1133_data *data, u8 adc,
+ u8 adc_sens)
+{
+ int err;
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCSENS(adc), adc_sens);
+ if (err)
+ return err;
+
+ data->adc_sens[adc] = adc_sens;
+
+ return 0;
+}
+
+static int si1133_update_adcsens(struct si1133_data *data, u8 mask,
+ u8 shift, u8 value)
+{
+ int err;
+ u32 adc_sens;
+
+ err = si1133_param_query(data, SI1133_PARAM_REG_ADCSENS(0),
+ &adc_sens);
+ if (err)
+ return err;
+
+ adc_sens &= ~mask;
+ adc_sens |= (value << shift);
+
+ return si1133_chan_set_adcsens(data, 0, adc_sens);
+}
+
+static int si1133_get_lux(struct si1133_data *data, int *val)
+{
+ int err;
+ int lux;
+ u32 high_vis;
+ u32 low_vis;
+ u32 ir;
+ u8 buffer[SI1133_LUX_BUFFER_SIZE];
+
+ /* Activate lux channels */
+ err = si1133_set_chlist(data, SI1133_LUX_ADC_MASK);
+ if (err)
+ return err;
+
+ err = si1133_bulk_read(data, SI1133_REG_HOSTOUT(0),
+ SI1133_LUX_BUFFER_SIZE, buffer);
+ if (err)
+ return err;
+
+ high_vis = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
+ low_vis = (buffer[3] << 16) | (buffer[4] << 8) | buffer[5];
+ ir = (buffer[6] << 16) | (buffer[7] << 8) | buffer[8];
+
+ if (high_vis > SI1133_ADC_THRESHOLD || ir > SI1133_ADC_THRESHOLD)
+ lux = si1133_calc_polynomial(high_vis, ir,
+ SI1133_INPUT_FRACTION_HIGH,
+ ARRAY_SIZE(lux_coeff.coeff_high),
+ &lux_coeff.coeff_high[0]);
+ else
+ lux = si1133_calc_polynomial(low_vis, ir,
+ SI1133_INPUT_FRACTION_LOW,
+ ARRAY_SIZE(lux_coeff.coeff_low),
+ &lux_coeff.coeff_low[0]);
+
+ *val = lux >> SI1133_LUX_OUTPUT_FRACTION;
+
+ return err;
+}
+
+static int si1133_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct si1133_data *data = iio_priv(iio_dev);
+ u8 adc_sens = data->adc_sens[0];
+ int err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ err = si1133_get_lux(data, val);
+ if (err)
+ return err;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ err = si1133_measure(data, chan, val);
+ if (err)
+ return err;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ adc_sens &= SI1133_ADCSENS_HW_GAIN_MASK;
+
+ *val = si1133_int_time_table[adc_sens][0];
+ *val2 = si1133_int_time_table[adc_sens][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ adc_sens &= SI1133_ADCSENS_SCALE_MASK;
+ adc_sens >>= SI1133_ADCSENS_SCALE_SHIFT;
+
+ *val = BIT(adc_sens);
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ adc_sens >>= SI1133_ADCSENS_HSIG_SHIFT;
+
+ *val = adc_sens;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int si1133_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct si1133_data *data = iio_priv(iio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ val = si1133_scale_to_swgain(val, val2);
+ if (val < 0)
+ return val;
+
+ return si1133_update_adcsens(data,
+ SI1133_ADCSENS_SCALE_MASK,
+ SI1133_ADCSENS_SCALE_SHIFT,
+ val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ return si1133_set_integration_time(data, 0, val, val2);
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_UVINDEX:
+ if (val != 0 && val != 1)
+ return -EINVAL;
+
+ return si1133_update_adcsens(data,
+ SI1133_ADCSENS_HSIG_MASK,
+ SI1133_ADCSENS_HSIG_SHIFT,
+ val);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static struct attribute *si1133_attributes[] = {
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ &iio_const_attr_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group si1133_attribute_group = {
+ .attrs = si1133_attributes,
+};
+
+static const struct iio_info si1133_info = {
+ .read_raw = si1133_read_raw,
+ .write_raw = si1133_write_raw,
+ .attrs = &si1133_attribute_group,
+};
+
+/*
+ * si1133_init_lux_channels - Configure 3 different channels(adc) (1,2 and 3)
+ * The channel configuration for the lux measurement was taken from :
+ * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00578
+ *
+ * Reserved the channel 0 for the other raw measurements
+ */
+static int si1133_init_lux_channels(struct si1133_data *data)
+{
+ int err;
+
+ err = si1133_chan_set_adcconfig(data, 1,
+ SI1133_ADCCONFIG_DECIM_RATE(1) |
+ SI1133_PARAM_ADCMUX_LARGE_WHITE);
+ if (err)
+ return err;
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCPOST(1),
+ SI1133_ADCPOST_24BIT_EN |
+ SI1133_ADCPOST_POSTSHIFT_BITQTY(0));
+ if (err)
+ return err;
+ err = si1133_chan_set_adcsens(data, 1, SI1133_ADCSENS_HSIG_MASK |
+ SI1133_ADCSENS_NB_MEAS(64) | _48_8_us);
+ if (err)
+ return err;
+
+ err = si1133_chan_set_adcconfig(data, 2,
+ SI1133_ADCCONFIG_DECIM_RATE(1) |
+ SI1133_PARAM_ADCMUX_LARGE_WHITE);
+ if (err)
+ return err;
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCPOST(2),
+ SI1133_ADCPOST_24BIT_EN |
+ SI1133_ADCPOST_POSTSHIFT_BITQTY(2));
+ if (err)
+ return err;
+
+ err = si1133_chan_set_adcsens(data, 2, SI1133_ADCSENS_HSIG_MASK |
+ SI1133_ADCSENS_NB_MEAS(1) | _3_120_0_us);
+ if (err)
+ return err;
+
+ err = si1133_chan_set_adcconfig(data, 3,
+ SI1133_ADCCONFIG_DECIM_RATE(1) |
+ SI1133_PARAM_ADCMUX_MED_IR);
+ if (err)
+ return err;
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCPOST(3),
+ SI1133_ADCPOST_24BIT_EN |
+ SI1133_ADCPOST_POSTSHIFT_BITQTY(2));
+ if (err)
+ return err;
+
+ return si1133_chan_set_adcsens(data, 3, SI1133_ADCSENS_HSIG_MASK |
+ SI1133_ADCSENS_NB_MEAS(64) | _48_8_us);
+}
+
+static int si1133_initialize(struct si1133_data *data)
+{
+ int err;
+
+ err = si1133_cmd_reset_sw(data);
+ if (err)
+ return err;
+
+ /* Turn off autonomous mode */
+ err = si1133_param_set(data, SI1133_REG_MEAS_RATE, 0);
+ if (err)
+ return err;
+
+ err = si1133_init_lux_channels(data);
+ if (err)
+ return err;
+
+ return regmap_write(data->regmap, SI1133_REG_IRQ_ENABLE,
+ SI1133_IRQ_CHANNEL_ENABLE);
+}
+
+static int si1133_validate_ids(struct iio_dev *iio_dev)
+{
+ struct si1133_data *data = iio_priv(iio_dev);
+
+ unsigned int part_id, rev_id, mfr_id;
+ int err;
+
+ err = regmap_read(data->regmap, SI1133_REG_PART_ID, &part_id);
+ if (err)
+ return err;
+
+ err = regmap_read(data->regmap, SI1133_REG_REV_ID, &rev_id);
+ if (err)
+ return err;
+
+ err = regmap_read(data->regmap, SI1133_REG_MFR_ID, &mfr_id);
+ if (err)
+ return err;
+
+ dev_info(&iio_dev->dev,
+ "Device ID part %#02hhx rev %#02hhx mfr %#02hhx\n",
+ part_id, rev_id, mfr_id);
+ if (part_id != SI1133_PART_ID) {
+ dev_err(&iio_dev->dev,
+ "Part ID mismatch got %#02hhx, expected %#02x\n",
+ part_id, SI1133_PART_ID);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int si1133_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si1133_data *data;
+ struct iio_dev *iio_dev;
+ int err;
+
+ iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!iio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(iio_dev);
+
+ init_completion(&data->completion);
+
+ data->regmap = devm_regmap_init_i2c(client, &si1133_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ err = PTR_ERR(data->regmap);
+ dev_err(&client->dev, "Failed to initialise regmap: %d\n", err);
+ return err;
+ }
+
+ i2c_set_clientdata(client, iio_dev);
+ data->client = client;
+
+ iio_dev->dev.parent = &client->dev;
+ iio_dev->name = id->name;
+ iio_dev->channels = si1133_channels;
+ iio_dev->num_channels = ARRAY_SIZE(si1133_channels);
+ iio_dev->info = &si1133_info;
+ iio_dev->modes = INDIO_DIRECT_MODE;
+
+ mutex_init(&data->mutex);
+
+ err = si1133_validate_ids(iio_dev);
+ if (err)
+ return err;
+
+ err = si1133_initialize(data);
+ if (err) {
+ dev_err(&client->dev,
+ "Error when initializing chip: %d\n", err);
+ return err;
+ }
+
+ if (!client->irq) {
+ dev_err(&client->dev,
+ "Required interrupt not provided, cannot proceed\n");
+ return -EINVAL;
+ }
+
+ err = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL,
+ si1133_threaded_irq_handler,
+ IRQF_ONESHOT | IRQF_SHARED,
+ client->name, iio_dev);
+ if (err) {
+ dev_warn(&client->dev, "Request irq %d failed: %i\n",
+ client->irq, err);
+ return err;
+ }
+
+ return devm_iio_device_register(&client->dev, iio_dev);
+}
+
+static const struct i2c_device_id si1133_ids[] = {
+ { "si1133", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, si1133_ids);
+
+static struct i2c_driver si1133_driver = {
+ .driver = {
+ .name = "si1133",
+ },
+ .probe = si1133_probe,
+ .id_table = si1133_ids,
+};
+
+module_i2c_driver(si1133_driver);
+
+MODULE_AUTHOR("Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>");
+MODULE_DESCRIPTION("Silabs SI1133, UV index sensor and ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
new file mode 100644
index 0000000..76f16f9
--- /dev/null
+++ b/drivers/iio/light/si1145.c
@@ -0,0 +1,1401 @@
+/*
+ * si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient
+ * light, UV index and proximity sensors
+ *
+ * Copyright 2014-16 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
+ * Copyright 2016 Crestez Dan Leonard <leonard.crestez@intel.com>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * SI1132 (7-bit I2C slave address 0x60)
+ * SI1141/2/3 (7-bit I2C slave address 0x5a)
+ * SI1145/6/6 (7-bit I2C slave address 0x60)
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/buffer.h>
+#include <linux/util_macros.h>
+
+#define SI1145_REG_PART_ID 0x00
+#define SI1145_REG_REV_ID 0x01
+#define SI1145_REG_SEQ_ID 0x02
+#define SI1145_REG_INT_CFG 0x03
+#define SI1145_REG_IRQ_ENABLE 0x04
+#define SI1145_REG_IRQ_MODE 0x05
+#define SI1145_REG_HW_KEY 0x07
+#define SI1145_REG_MEAS_RATE 0x08
+#define SI1145_REG_PS_LED21 0x0f
+#define SI1145_REG_PS_LED3 0x10
+#define SI1145_REG_UCOEF1 0x13
+#define SI1145_REG_UCOEF2 0x14
+#define SI1145_REG_UCOEF3 0x15
+#define SI1145_REG_UCOEF4 0x16
+#define SI1145_REG_PARAM_WR 0x17
+#define SI1145_REG_COMMAND 0x18
+#define SI1145_REG_RESPONSE 0x20
+#define SI1145_REG_IRQ_STATUS 0x21
+#define SI1145_REG_ALSVIS_DATA 0x22
+#define SI1145_REG_ALSIR_DATA 0x24
+#define SI1145_REG_PS1_DATA 0x26
+#define SI1145_REG_PS2_DATA 0x28
+#define SI1145_REG_PS3_DATA 0x2a
+#define SI1145_REG_AUX_DATA 0x2c
+#define SI1145_REG_PARAM_RD 0x2e
+#define SI1145_REG_CHIP_STAT 0x30
+
+#define SI1145_UCOEF1_DEFAULT 0x7b
+#define SI1145_UCOEF2_DEFAULT 0x6b
+#define SI1145_UCOEF3_DEFAULT 0x01
+#define SI1145_UCOEF4_DEFAULT 0x00
+
+/* Helper to figure out PS_LED register / shift per channel */
+#define SI1145_PS_LED_REG(ch) \
+ (((ch) == 2) ? SI1145_REG_PS_LED3 : SI1145_REG_PS_LED21)
+#define SI1145_PS_LED_SHIFT(ch) \
+ (((ch) == 1) ? 4 : 0)
+
+/* Parameter offsets */
+#define SI1145_PARAM_CHLIST 0x01
+#define SI1145_PARAM_PSLED12_SELECT 0x02
+#define SI1145_PARAM_PSLED3_SELECT 0x03
+#define SI1145_PARAM_PS_ENCODING 0x05
+#define SI1145_PARAM_ALS_ENCODING 0x06
+#define SI1145_PARAM_PS1_ADC_MUX 0x07
+#define SI1145_PARAM_PS2_ADC_MUX 0x08
+#define SI1145_PARAM_PS3_ADC_MUX 0x09
+#define SI1145_PARAM_PS_ADC_COUNTER 0x0a
+#define SI1145_PARAM_PS_ADC_GAIN 0x0b
+#define SI1145_PARAM_PS_ADC_MISC 0x0c
+#define SI1145_PARAM_ALS_ADC_MUX 0x0d
+#define SI1145_PARAM_ALSIR_ADC_MUX 0x0e
+#define SI1145_PARAM_AUX_ADC_MUX 0x0f
+#define SI1145_PARAM_ALSVIS_ADC_COUNTER 0x10
+#define SI1145_PARAM_ALSVIS_ADC_GAIN 0x11
+#define SI1145_PARAM_ALSVIS_ADC_MISC 0x12
+#define SI1145_PARAM_LED_RECOVERY 0x1c
+#define SI1145_PARAM_ALSIR_ADC_COUNTER 0x1d
+#define SI1145_PARAM_ALSIR_ADC_GAIN 0x1e
+#define SI1145_PARAM_ALSIR_ADC_MISC 0x1f
+#define SI1145_PARAM_ADC_OFFSET 0x1a
+
+/* Channel enable masks for CHLIST parameter */
+#define SI1145_CHLIST_EN_PS1 BIT(0)
+#define SI1145_CHLIST_EN_PS2 BIT(1)
+#define SI1145_CHLIST_EN_PS3 BIT(2)
+#define SI1145_CHLIST_EN_ALSVIS BIT(4)
+#define SI1145_CHLIST_EN_ALSIR BIT(5)
+#define SI1145_CHLIST_EN_AUX BIT(6)
+#define SI1145_CHLIST_EN_UV BIT(7)
+
+/* Proximity measurement mode for ADC_MISC parameter */
+#define SI1145_PS_ADC_MODE_NORMAL BIT(2)
+/* Signal range mask for ADC_MISC parameter */
+#define SI1145_ADC_MISC_RANGE BIT(5)
+
+/* Commands for REG_COMMAND */
+#define SI1145_CMD_NOP 0x00
+#define SI1145_CMD_RESET 0x01
+#define SI1145_CMD_PS_FORCE 0x05
+#define SI1145_CMD_ALS_FORCE 0x06
+#define SI1145_CMD_PSALS_FORCE 0x07
+#define SI1145_CMD_PS_PAUSE 0x09
+#define SI1145_CMD_ALS_PAUSE 0x0a
+#define SI1145_CMD_PSALS_PAUSE 0x0b
+#define SI1145_CMD_PS_AUTO 0x0d
+#define SI1145_CMD_ALS_AUTO 0x0e
+#define SI1145_CMD_PSALS_AUTO 0x0f
+#define SI1145_CMD_PARAM_QUERY 0x80
+#define SI1145_CMD_PARAM_SET 0xa0
+
+#define SI1145_RSP_INVALID_SETTING 0x80
+#define SI1145_RSP_COUNTER_MASK 0x0F
+
+/* Minimum sleep after each command to ensure it's received */
+#define SI1145_COMMAND_MINSLEEP_MS 5
+/* Return -ETIMEDOUT after this long */
+#define SI1145_COMMAND_TIMEOUT_MS 25
+
+/* Interrupt configuration masks for INT_CFG register */
+#define SI1145_INT_CFG_OE BIT(0) /* enable interrupt */
+#define SI1145_INT_CFG_MODE BIT(1) /* auto reset interrupt pin */
+
+/* Interrupt enable masks for IRQ_ENABLE register */
+#define SI1145_MASK_ALL_IE (BIT(4) | BIT(3) | BIT(2) | BIT(0))
+
+#define SI1145_MUX_TEMP 0x65
+#define SI1145_MUX_VDD 0x75
+
+/* Proximity LED current; see Table 2 in datasheet */
+#define SI1145_LED_CURRENT_45mA 0x04
+
+enum {
+ SI1132,
+ SI1141,
+ SI1142,
+ SI1143,
+ SI1145,
+ SI1146,
+ SI1147,
+};
+
+struct si1145_part_info {
+ u8 part;
+ const struct iio_info *iio_info;
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+ unsigned int num_leds;
+ bool uncompressed_meas_rate;
+};
+
+/**
+ * struct si1145_data - si1145 chip state data
+ * @client: I2C client
+ * @lock: mutex to protect shared state.
+ * @cmdlock: Low-level mutex to protect command execution only
+ * @rsp_seq: Next expected response number or -1 if counter reset required
+ * @scan_mask: Saved scan mask to avoid duplicate set_chlist
+ * @autonomous: If automatic measurements are active (for buffer support)
+ * @part_info: Part information
+ * @trig: Pointer to iio trigger
+ * @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode
+ */
+struct si1145_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ struct mutex cmdlock;
+ int rsp_seq;
+ const struct si1145_part_info *part_info;
+ unsigned long scan_mask;
+ bool autonomous;
+ struct iio_trigger *trig;
+ int meas_rate;
+};
+
+/**
+ * __si1145_command_reset() - Send CMD_NOP and wait for response 0
+ *
+ * Does not modify data->rsp_seq
+ *
+ * Return: 0 on success and -errno on error.
+ */
+static int __si1145_command_reset(struct si1145_data *data)
+{
+ struct device *dev = &data->client->dev;
+ unsigned long stop_jiffies;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND,
+ SI1145_CMD_NOP);
+ if (ret < 0)
+ return ret;
+ msleep(SI1145_COMMAND_MINSLEEP_MS);
+
+ stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000;
+ while (true) {
+ ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_RESPONSE);
+ if (ret <= 0)
+ return ret;
+ if (time_after(jiffies, stop_jiffies)) {
+ dev_warn(dev, "timeout on reset\n");
+ return -ETIMEDOUT;
+ }
+ msleep(SI1145_COMMAND_MINSLEEP_MS);
+ continue;
+ }
+}
+
+/**
+ * si1145_command() - Execute a command and poll the response register
+ *
+ * All conversion overflows are reported as -EOVERFLOW
+ * INVALID_SETTING is reported as -EINVAL
+ * Timeouts are reported as -ETIMEDOUT
+ *
+ * Return: 0 on success or -errno on failure
+ */
+static int si1145_command(struct si1145_data *data, u8 cmd)
+{
+ struct device *dev = &data->client->dev;
+ unsigned long stop_jiffies;
+ int ret;
+
+ mutex_lock(&data->cmdlock);
+
+ if (data->rsp_seq < 0) {
+ ret = __si1145_command_reset(data);
+ if (ret < 0) {
+ dev_err(dev, "failed to reset command counter, ret=%d\n",
+ ret);
+ goto out;
+ }
+ data->rsp_seq = 0;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, cmd);
+ if (ret) {
+ dev_warn(dev, "failed to write command, ret=%d\n", ret);
+ goto out;
+ }
+ /* Sleep a little to ensure the command is received */
+ msleep(SI1145_COMMAND_MINSLEEP_MS);
+
+ stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000;
+ while (true) {
+ ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_RESPONSE);
+ if (ret < 0) {
+ dev_warn(dev, "failed to read response, ret=%d\n", ret);
+ break;
+ }
+
+ if ((ret & ~SI1145_RSP_COUNTER_MASK) == 0) {
+ if (ret == data->rsp_seq) {
+ if (time_after(jiffies, stop_jiffies)) {
+ dev_warn(dev, "timeout on command %#02hhx\n",
+ cmd);
+ ret = -ETIMEDOUT;
+ break;
+ }
+ msleep(SI1145_COMMAND_MINSLEEP_MS);
+ continue;
+ }
+ if (ret == ((data->rsp_seq + 1) &
+ SI1145_RSP_COUNTER_MASK)) {
+ data->rsp_seq = ret;
+ ret = 0;
+ break;
+ }
+ dev_warn(dev, "unexpected response counter %d instead of %d\n",
+ ret, (data->rsp_seq + 1) &
+ SI1145_RSP_COUNTER_MASK);
+ ret = -EIO;
+ } else {
+ if (ret == SI1145_RSP_INVALID_SETTING) {
+ dev_warn(dev, "INVALID_SETTING error on command %#02hhx\n",
+ cmd);
+ ret = -EINVAL;
+ } else {
+ /* All overflows are treated identically */
+ dev_dbg(dev, "overflow, ret=%d, cmd=%#02hhx\n",
+ ret, cmd);
+ ret = -EOVERFLOW;
+ }
+ }
+
+ /* Force a counter reset next time */
+ data->rsp_seq = -1;
+ break;
+ }
+
+out:
+ mutex_unlock(&data->cmdlock);
+
+ return ret;
+}
+
+static int si1145_param_update(struct si1145_data *data, u8 op, u8 param,
+ u8 value)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_PARAM_WR, value);
+ if (ret < 0)
+ return ret;
+
+ return si1145_command(data, op | (param & 0x1F));
+}
+
+static int si1145_param_set(struct si1145_data *data, u8 param, u8 value)
+{
+ return si1145_param_update(data, SI1145_CMD_PARAM_SET, param, value);
+}
+
+/* Set param. Returns negative errno or current value */
+static int si1145_param_query(struct si1145_data *data, u8 param)
+{
+ int ret;
+
+ ret = si1145_command(data, SI1145_CMD_PARAM_QUERY | (param & 0x1F));
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_read_byte_data(data->client, SI1145_REG_PARAM_RD);
+}
+
+/* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */
+static u16 si1145_uncompress(u8 x)
+{
+ u16 result = 0;
+ u8 exponent = 0;
+
+ if (x < 8)
+ return 0;
+
+ exponent = (x & 0xf0) >> 4;
+ result = 0x10 | (x & 0x0f);
+
+ if (exponent >= 4)
+ return result << (exponent - 4);
+ return result >> (4 - exponent);
+}
+
+/* Compress 16 bit value to 8 bit, see Silabs AN498 */
+static u8 si1145_compress(u16 x)
+{
+ u32 exponent = 0;
+ u32 significand = 0;
+ u32 tmp = x;
+
+ if (x == 0x0000)
+ return 0x00;
+ if (x == 0x0001)
+ return 0x08;
+
+ while (1) {
+ tmp >>= 1;
+ exponent += 1;
+ if (tmp == 1)
+ break;
+ }
+
+ if (exponent < 5) {
+ significand = x << (4 - exponent);
+ return (exponent << 4) | (significand & 0xF);
+ }
+
+ significand = x >> (exponent - 5);
+ if (significand & 1) {
+ significand += 2;
+ if (significand & 0x0040) {
+ exponent += 1;
+ significand >>= 1;
+ }
+ }
+
+ return (exponent << 4) | ((significand >> 1) & 0xF);
+}
+
+/* Write meas_rate in hardware */
+static int si1145_set_meas_rate(struct si1145_data *data, int interval)
+{
+ if (data->part_info->uncompressed_meas_rate)
+ return i2c_smbus_write_word_data(data->client,
+ SI1145_REG_MEAS_RATE, interval);
+ else
+ return i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_MEAS_RATE, interval);
+}
+
+static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2)
+{
+ *val = 32000;
+ if (data->part_info->uncompressed_meas_rate)
+ *val2 = data->meas_rate;
+ else
+ *val2 = si1145_uncompress(data->meas_rate);
+ return IIO_VAL_FRACTIONAL;
+}
+
+/* Set the samp freq in driver private data */
+static int si1145_store_samp_freq(struct si1145_data *data, int val)
+{
+ int ret = 0;
+ int meas_rate;
+
+ if (val <= 0 || val > 32000)
+ return -ERANGE;
+ meas_rate = 32000 / val;
+
+ mutex_lock(&data->lock);
+ if (data->autonomous) {
+ ret = si1145_set_meas_rate(data, meas_rate);
+ if (ret)
+ goto out;
+ }
+ if (data->part_info->uncompressed_meas_rate)
+ data->meas_rate = meas_rate;
+ else
+ data->meas_rate = si1145_compress(meas_rate);
+
+out:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static irqreturn_t si1145_trigger_handler(int irq, void *private)
+{
+ struct iio_poll_func *pf = private;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct si1145_data *data = iio_priv(indio_dev);
+ /*
+ * Maximum buffer size:
+ * 6*2 bytes channels data + 4 bytes alignment +
+ * 8 bytes timestamp
+ */
+ u8 buffer[24];
+ int i, j = 0;
+ int ret;
+ u8 irq_status = 0;
+
+ if (!data->autonomous) {
+ ret = si1145_command(data, SI1145_CMD_PSALS_FORCE);
+ if (ret < 0 && ret != -EOVERFLOW)
+ goto done;
+ } else {
+ irq_status = ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_IRQ_STATUS);
+ if (ret < 0)
+ goto done;
+ if (!(irq_status & SI1145_MASK_ALL_IE))
+ goto done;
+ }
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ int run = 1;
+
+ while (i + run < indio_dev->masklength) {
+ if (!test_bit(i + run, indio_dev->active_scan_mask))
+ break;
+ if (indio_dev->channels[i + run].address !=
+ indio_dev->channels[i].address + 2 * run)
+ break;
+ run++;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data_or_emulated(
+ data->client, indio_dev->channels[i].address,
+ sizeof(u16) * run, &buffer[j]);
+ if (ret < 0)
+ goto done;
+ j += run * sizeof(u16);
+ i += run - 1;
+ }
+
+ if (data->autonomous) {
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_IRQ_STATUS,
+ irq_status & SI1145_MASK_ALL_IE);
+ if (ret < 0)
+ goto done;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 reg = 0, mux;
+ int ret;
+ int i;
+
+ /* channel list already set, no need to reprogram */
+ if (data->scan_mask == scan_mask)
+ return 0;
+
+ for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+ switch (indio_dev->channels[i].address) {
+ case SI1145_REG_ALSVIS_DATA:
+ reg |= SI1145_CHLIST_EN_ALSVIS;
+ break;
+ case SI1145_REG_ALSIR_DATA:
+ reg |= SI1145_CHLIST_EN_ALSIR;
+ break;
+ case SI1145_REG_PS1_DATA:
+ reg |= SI1145_CHLIST_EN_PS1;
+ break;
+ case SI1145_REG_PS2_DATA:
+ reg |= SI1145_CHLIST_EN_PS2;
+ break;
+ case SI1145_REG_PS3_DATA:
+ reg |= SI1145_CHLIST_EN_PS3;
+ break;
+ case SI1145_REG_AUX_DATA:
+ switch (indio_dev->channels[i].type) {
+ case IIO_UVINDEX:
+ reg |= SI1145_CHLIST_EN_UV;
+ break;
+ default:
+ reg |= SI1145_CHLIST_EN_AUX;
+ if (indio_dev->channels[i].type == IIO_TEMP)
+ mux = SI1145_MUX_TEMP;
+ else
+ mux = SI1145_MUX_VDD;
+ ret = si1145_param_set(data,
+ SI1145_PARAM_AUX_ADC_MUX, mux);
+ if (ret < 0)
+ return ret;
+
+ break;
+ }
+ }
+ }
+
+ data->scan_mask = scan_mask;
+ ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg);
+
+ return ret < 0 ? ret : 0;
+}
+
+static int si1145_measure(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 cmd;
+ int ret;
+
+ ret = si1145_set_chlist(indio_dev, BIT(chan->scan_index));
+ if (ret < 0)
+ return ret;
+
+ cmd = (chan->type == IIO_PROXIMITY) ? SI1145_CMD_PS_FORCE :
+ SI1145_CMD_ALS_FORCE;
+ ret = si1145_command(data, cmd);
+ if (ret < 0 && ret != -EOVERFLOW)
+ return ret;
+
+ return i2c_smbus_read_word_data(data->client, chan->address);
+}
+
+/*
+ * Conversion between iio scale and ADC_GAIN values
+ * These could be further adjusted but proximity/intensity are dimensionless
+ */
+static const int si1145_proximity_scale_available[] = {
+ 128, 64, 32, 16, 8, 4};
+static const int si1145_intensity_scale_available[] = {
+ 128, 64, 32, 16, 8, 4, 2, 1};
+static IIO_CONST_ATTR(in_proximity_scale_available,
+ "128 64 32 16 8 4");
+static IIO_CONST_ATTR(in_intensity_scale_available,
+ "128 64 32 16 8 4 2 1");
+static IIO_CONST_ATTR(in_intensity_ir_scale_available,
+ "128 64 32 16 8 4 2 1");
+
+static int si1145_scale_from_adcgain(int regval)
+{
+ return 128 >> regval;
+}
+
+static int si1145_proximity_adcgain_from_scale(int val, int val2)
+{
+ val = find_closest_descending(val, si1145_proximity_scale_available,
+ ARRAY_SIZE(si1145_proximity_scale_available));
+ if (val < 0 || val > 5 || val2 != 0)
+ return -EINVAL;
+
+ return val;
+}
+
+static int si1145_intensity_adcgain_from_scale(int val, int val2)
+{
+ val = find_closest_descending(val, si1145_intensity_scale_available,
+ ARRAY_SIZE(si1145_intensity_scale_available));
+ if (val < 0 || val > 7 || val2 != 0)
+ return -EINVAL;
+
+ return val;
+}
+
+static int si1145_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ int ret;
+ u8 reg;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_PROXIMITY:
+ case IIO_VOLTAGE:
+ case IIO_TEMP:
+ case IIO_UVINDEX:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = si1145_measure(indio_dev, chan);
+ iio_device_release_direct_mode(indio_dev);
+
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return IIO_VAL_INT;
+ case IIO_CURRENT:
+ ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_PS_LED_REG(chan->channel));
+ if (ret < 0)
+ return ret;
+
+ *val = (ret >> SI1145_PS_LED_SHIFT(chan->channel))
+ & 0x0f;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ reg = SI1145_PARAM_PS_ADC_GAIN;
+ break;
+ case IIO_INTENSITY:
+ if (chan->channel2 == IIO_MOD_LIGHT_IR)
+ reg = SI1145_PARAM_ALSIR_ADC_GAIN;
+ else
+ reg = SI1145_PARAM_ALSVIS_ADC_GAIN;
+ break;
+ case IIO_TEMP:
+ *val = 28;
+ *val2 = 571429;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_UVINDEX:
+ *val = 0;
+ *val2 = 10000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+ ret = si1145_param_query(data, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = si1145_scale_from_adcgain(ret & 0x07);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_TEMP:
+ /*
+ * -ADC offset - ADC counts @ 25°C -
+ * 35 * ADC counts / °C
+ */
+ *val = -256 - 11136 + 25 * 35;
+ return IIO_VAL_INT;
+ default:
+ /*
+ * All ADC measurements have are by default offset
+ * by -256
+ * See AN498 5.6.3
+ */
+ ret = si1145_param_query(data, SI1145_PARAM_ADC_OFFSET);
+ if (ret < 0)
+ return ret;
+ *val = -si1145_uncompress(ret);
+ return IIO_VAL_INT;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1145_read_samp_freq(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int si1145_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 reg1, reg2, shift;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ val = si1145_proximity_adcgain_from_scale(val, val2);
+ if (val < 0)
+ return val;
+ reg1 = SI1145_PARAM_PS_ADC_GAIN;
+ reg2 = SI1145_PARAM_PS_ADC_COUNTER;
+ break;
+ case IIO_INTENSITY:
+ val = si1145_intensity_adcgain_from_scale(val, val2);
+ if (val < 0)
+ return val;
+ if (chan->channel2 == IIO_MOD_LIGHT_IR) {
+ reg1 = SI1145_PARAM_ALSIR_ADC_GAIN;
+ reg2 = SI1145_PARAM_ALSIR_ADC_COUNTER;
+ } else {
+ reg1 = SI1145_PARAM_ALSVIS_ADC_GAIN;
+ reg2 = SI1145_PARAM_ALSVIS_ADC_COUNTER;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ ret = si1145_param_set(data, reg1, val);
+ if (ret < 0) {
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ }
+ /* Set recovery period to one's complement of gain */
+ ret = si1145_param_set(data, reg2, (~val & 0x07) << 4);
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type != IIO_CURRENT)
+ return -EINVAL;
+
+ if (val < 0 || val > 15 || val2 != 0)
+ return -EINVAL;
+
+ reg1 = SI1145_PS_LED_REG(chan->channel);
+ shift = SI1145_PS_LED_SHIFT(chan->channel);
+
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, reg1);
+ if (ret < 0) {
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ }
+ ret = i2c_smbus_write_byte_data(data->client, reg1,
+ (ret & ~(0x0f << shift)) |
+ ((val & 0x0f) << shift));
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1145_store_samp_freq(data, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+#define SI1145_ST { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+}
+
+#define SI1145_INTENSITY_CHANNEL(_si) { \
+ .type = IIO_INTENSITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_ALSVIS_DATA, \
+}
+
+#define SI1145_INTENSITY_IR_CHANNEL(_si) { \
+ .type = IIO_INTENSITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .modified = 1, \
+ .channel2 = IIO_MOD_LIGHT_IR, \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_ALSIR_DATA, \
+}
+
+#define SI1145_TEMP_CHANNEL(_si) { \
+ .type = IIO_TEMP, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_UV_CHANNEL(_si) { \
+ .type = IIO_UVINDEX, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_PROXIMITY_CHANNEL(_si, _ch) { \
+ .type = IIO_PROXIMITY, \
+ .indexed = 1, \
+ .channel = _ch, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_PS1_DATA + _ch * 2, \
+}
+
+#define SI1145_VOLTAGE_CHANNEL(_si) { \
+ .type = IIO_VOLTAGE, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_CURRENT_CHANNEL(_ch) { \
+ .type = IIO_CURRENT, \
+ .indexed = 1, \
+ .channel = _ch, \
+ .output = 1, \
+ .scan_index = -1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+}
+
+static const struct iio_chan_spec si1132_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_TEMP_CHANNEL(2),
+ SI1145_VOLTAGE_CHANNEL(3),
+ SI1145_UV_CHANNEL(4),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+};
+
+static const struct iio_chan_spec si1141_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_TEMP_CHANNEL(3),
+ SI1145_VOLTAGE_CHANNEL(4),
+ IIO_CHAN_SOFT_TIMESTAMP(5),
+ SI1145_CURRENT_CHANNEL(0),
+};
+
+static const struct iio_chan_spec si1142_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_TEMP_CHANNEL(4),
+ SI1145_VOLTAGE_CHANNEL(5),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+};
+
+static const struct iio_chan_spec si1143_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_PROXIMITY_CHANNEL(4, 2),
+ SI1145_TEMP_CHANNEL(5),
+ SI1145_VOLTAGE_CHANNEL(6),
+ IIO_CHAN_SOFT_TIMESTAMP(7),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+ SI1145_CURRENT_CHANNEL(2),
+};
+
+static const struct iio_chan_spec si1145_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_TEMP_CHANNEL(3),
+ SI1145_VOLTAGE_CHANNEL(4),
+ SI1145_UV_CHANNEL(5),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+ SI1145_CURRENT_CHANNEL(0),
+};
+
+static const struct iio_chan_spec si1146_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_TEMP_CHANNEL(2),
+ SI1145_VOLTAGE_CHANNEL(3),
+ SI1145_UV_CHANNEL(4),
+ SI1145_PROXIMITY_CHANNEL(5, 0),
+ SI1145_PROXIMITY_CHANNEL(6, 1),
+ IIO_CHAN_SOFT_TIMESTAMP(7),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+};
+
+static const struct iio_chan_spec si1147_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_PROXIMITY_CHANNEL(4, 2),
+ SI1145_TEMP_CHANNEL(5),
+ SI1145_VOLTAGE_CHANNEL(6),
+ SI1145_UV_CHANNEL(7),
+ IIO_CHAN_SOFT_TIMESTAMP(8),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+ SI1145_CURRENT_CHANNEL(2),
+};
+
+static struct attribute *si1132_attributes[] = {
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static struct attribute *si114x_attributes[] = {
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group si1132_attribute_group = {
+ .attrs = si1132_attributes,
+};
+
+static const struct attribute_group si114x_attribute_group = {
+ .attrs = si114x_attributes,
+};
+
+
+static const struct iio_info si1132_info = {
+ .read_raw = si1145_read_raw,
+ .write_raw = si1145_write_raw,
+ .attrs = &si1132_attribute_group,
+};
+
+static const struct iio_info si114x_info = {
+ .read_raw = si1145_read_raw,
+ .write_raw = si1145_write_raw,
+ .attrs = &si114x_attribute_group,
+};
+
+#define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) \
+ {id, iio_info, chans, ARRAY_SIZE(chans), leds, uncompressed_meas_rate}
+
+static const struct si1145_part_info si1145_part_info[] = {
+ [SI1132] = SI1145_PART(0x32, &si1132_info, si1132_channels, 0, true),
+ [SI1141] = SI1145_PART(0x41, &si114x_info, si1141_channels, 1, false),
+ [SI1142] = SI1145_PART(0x42, &si114x_info, si1142_channels, 2, false),
+ [SI1143] = SI1145_PART(0x43, &si114x_info, si1143_channels, 3, false),
+ [SI1145] = SI1145_PART(0x45, &si114x_info, si1145_channels, 1, true),
+ [SI1146] = SI1145_PART(0x46, &si114x_info, si1146_channels, 2, true),
+ [SI1147] = SI1145_PART(0x47, &si114x_info, si1147_channels, 3, true),
+};
+
+static int si1145_initialize(struct si1145_data *data)
+{
+ struct i2c_client *client = data->client;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, SI1145_REG_COMMAND,
+ SI1145_CMD_RESET);
+ if (ret < 0)
+ return ret;
+ msleep(SI1145_COMMAND_TIMEOUT_MS);
+
+ /* Hardware key, magic value */
+ ret = i2c_smbus_write_byte_data(client, SI1145_REG_HW_KEY, 0x17);
+ if (ret < 0)
+ return ret;
+ msleep(SI1145_COMMAND_TIMEOUT_MS);
+
+ /* Turn off autonomous mode */
+ ret = si1145_set_meas_rate(data, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Initialize sampling freq to 10 Hz */
+ ret = si1145_store_samp_freq(data, 10);
+ if (ret < 0)
+ return ret;
+
+ /* Set LED currents to 45 mA; have 4 bits, see Table 2 in datasheet */
+ switch (data->part_info->num_leds) {
+ case 3:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED3,
+ SI1145_LED_CURRENT_45mA);
+ if (ret < 0)
+ return ret;
+ /* fallthrough */
+ case 2:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED21,
+ (SI1145_LED_CURRENT_45mA << 4) |
+ SI1145_LED_CURRENT_45mA);
+ break;
+ case 1:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED21,
+ SI1145_LED_CURRENT_45mA);
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ if (ret < 0)
+ return ret;
+
+ /* Set normal proximity measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_MISC,
+ SI1145_PS_ADC_MODE_NORMAL);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_GAIN, 0x01);
+ if (ret < 0)
+ return ret;
+
+ /* ADC_COUNTER should be one complement of ADC_GAIN */
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_COUNTER, 0x06 << 4);
+ if (ret < 0)
+ return ret;
+
+ /* Set ALS visible measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_MISC,
+ SI1145_ADC_MISC_RANGE);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_GAIN, 0x03);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_COUNTER,
+ 0x04 << 4);
+ if (ret < 0)
+ return ret;
+
+ /* Set ALS IR measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_MISC,
+ SI1145_ADC_MISC_RANGE);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_GAIN, 0x01);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_COUNTER,
+ 0x06 << 4);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Initialize UCOEF to default values in datasheet
+ * These registers are normally zero on reset
+ */
+ if (data->part_info == &si1145_part_info[SI1132] ||
+ data->part_info == &si1145_part_info[SI1145] ||
+ data->part_info == &si1145_part_info[SI1146] ||
+ data->part_info == &si1145_part_info[SI1147]) {
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF1,
+ SI1145_UCOEF1_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF2, SI1145_UCOEF2_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF3, SI1145_UCOEF3_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF4, SI1145_UCOEF4_DEFAULT);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * Program the channels we want to measure with CMD_PSALS_AUTO. No need for
+ * _postdisable as we stop with CMD_PSALS_PAUSE; single measurement (direct)
+ * mode reprograms the channels list anyway...
+ */
+static int si1145_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = si1145_set_chlist(indio_dev, *indio_dev->active_scan_mask);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static bool si1145_validate_scan_mask(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ unsigned int count = 0;
+ int i;
+
+ /* Check that at most one AUX channel is enabled */
+ for_each_set_bit(i, scan_mask, data->part_info->num_channels) {
+ if (indio_dev->channels[i].address == SI1145_REG_AUX_DATA)
+ count++;
+ }
+
+ return count <= 1;
+}
+
+static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = {
+ .preenable = si1145_buffer_preenable,
+ .postenable = iio_triggered_buffer_postenable,
+ .predisable = iio_triggered_buffer_predisable,
+ .validate_scan_mask = si1145_validate_scan_mask,
+};
+
+/**
+ * si1145_trigger_set_state() - Set trigger state
+ *
+ * When not using triggers interrupts are disabled and measurement rate is
+ * set to zero in order to minimize power consumption.
+ */
+static int si1145_trigger_set_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct si1145_data *data = iio_priv(indio_dev);
+ int err = 0, ret;
+
+ mutex_lock(&data->lock);
+
+ if (state) {
+ data->autonomous = true;
+ err = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_INT_CFG, SI1145_INT_CFG_OE);
+ if (err < 0)
+ goto disable;
+ err = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_IRQ_ENABLE, SI1145_MASK_ALL_IE);
+ if (err < 0)
+ goto disable;
+ err = si1145_set_meas_rate(data, data->meas_rate);
+ if (err < 0)
+ goto disable;
+ err = si1145_command(data, SI1145_CMD_PSALS_AUTO);
+ if (err < 0)
+ goto disable;
+ } else {
+disable:
+ /* Disable as much as possible skipping errors */
+ ret = si1145_command(data, SI1145_CMD_PSALS_PAUSE);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = si1145_set_meas_rate(data, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_IRQ_ENABLE, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_INT_CFG, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ data->autonomous = false;
+ }
+
+ mutex_unlock(&data->lock);
+ return err;
+}
+
+static const struct iio_trigger_ops si1145_trigger_ops = {
+ .set_trigger_state = si1145_trigger_set_state,
+};
+
+static int si1145_probe_trigger(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+ struct iio_trigger *trig;
+ int ret;
+
+ trig = devm_iio_trigger_alloc(&client->dev,
+ "%s-dev%d", indio_dev->name, indio_dev->id);
+ if (!trig)
+ return -ENOMEM;
+
+ trig->dev.parent = &client->dev;
+ trig->ops = &si1145_trigger_ops;
+ iio_trigger_set_drvdata(trig, indio_dev);
+
+ ret = devm_request_irq(&client->dev, client->irq,
+ iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_FALLING,
+ "si1145_irq",
+ trig);
+ if (ret < 0) {
+ dev_err(&client->dev, "irq request failed\n");
+ return ret;
+ }
+
+ ret = iio_trigger_register(trig);
+ if (ret)
+ return ret;
+
+ data->trig = trig;
+ indio_dev->trig = iio_trigger_get(data->trig);
+
+ return 0;
+}
+
+static void si1145_remove_trigger(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+
+ if (data->trig) {
+ iio_trigger_unregister(data->trig);
+ data->trig = NULL;
+ }
+}
+
+static int si1145_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si1145_data *data;
+ struct iio_dev *indio_dev;
+ u8 part_id, rev_id, seq_id;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->part_info = &si1145_part_info[id->driver_data];
+
+ part_id = ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_PART_ID);
+ if (ret < 0)
+ return ret;
+ rev_id = ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_REV_ID);
+ if (ret < 0)
+ return ret;
+ seq_id = ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_SEQ_ID);
+ if (ret < 0)
+ return ret;
+ dev_info(&client->dev, "device ID part %#02hhx rev %#02hhx seq %#02hhx\n",
+ part_id, rev_id, seq_id);
+ if (part_id != data->part_info->part) {
+ dev_err(&client->dev, "part ID mismatch got %#02hhx, expected %#02x\n",
+ part_id, data->part_info->part);
+ return -ENODEV;
+ }
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->name = id->name;
+ indio_dev->channels = data->part_info->channels;
+ indio_dev->num_channels = data->part_info->num_channels;
+ indio_dev->info = data->part_info->iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ mutex_init(&data->lock);
+ mutex_init(&data->cmdlock);
+
+ ret = si1145_initialize(data);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ si1145_trigger_handler, &si1145_buffer_setup_ops);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq) {
+ ret = si1145_probe_trigger(indio_dev);
+ if (ret < 0)
+ goto error_free_buffer;
+ } else {
+ dev_info(&client->dev, "no irq, using polling\n");
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto error_free_trigger;
+
+ return 0;
+
+error_free_trigger:
+ si1145_remove_trigger(indio_dev);
+error_free_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return ret;
+}
+
+static const struct i2c_device_id si1145_ids[] = {
+ { "si1132", SI1132 },
+ { "si1141", SI1141 },
+ { "si1142", SI1142 },
+ { "si1143", SI1143 },
+ { "si1145", SI1145 },
+ { "si1146", SI1146 },
+ { "si1147", SI1147 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, si1145_ids);
+
+static int si1145_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ si1145_remove_trigger(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+
+ return 0;
+}
+
+static struct i2c_driver si1145_driver = {
+ .driver = {
+ .name = "si1145",
+ },
+ .probe = si1145_probe,
+ .remove = si1145_remove,
+ .id_table = si1145_ids,
+};
+
+module_i2c_driver(si1145_driver);
+
+MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Silabs SI1132 and SI1141/2/3/5/6/7 proximity, ambient light and UV index sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/st_uvis25.h b/drivers/iio/light/st_uvis25.h
new file mode 100644
index 0000000..5e970ab
--- /dev/null
+++ b/drivers/iio/light/st_uvis25.h
@@ -0,0 +1,37 @@
+/*
+ * STMicroelectronics uvis25 sensor driver
+ *
+ * Copyright 2017 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_UVIS25_H
+#define ST_UVIS25_H
+
+#define ST_UVIS25_DEV_NAME "uvis25"
+
+#include <linux/iio/iio.h>
+
+/**
+ * struct st_uvis25_hw - ST UVIS25 sensor instance
+ * @regmap: Register map of the device.
+ * @trig: The trigger in use by the driver.
+ * @enabled: Status of the sensor (false->off, true->on).
+ * @irq: Device interrupt line (I2C or SPI).
+ */
+struct st_uvis25_hw {
+ struct regmap *regmap;
+
+ struct iio_trigger *trig;
+ bool enabled;
+ int irq;
+};
+
+extern const struct dev_pm_ops st_uvis25_pm_ops;
+
+int st_uvis25_probe(struct device *dev, int irq, struct regmap *regmap);
+
+#endif /* ST_UVIS25_H */
diff --git a/drivers/iio/light/st_uvis25_core.c b/drivers/iio/light/st_uvis25_core.c
new file mode 100644
index 0000000..3026358
--- /dev/null
+++ b/drivers/iio/light/st_uvis25_core.c
@@ -0,0 +1,359 @@
+/*
+ * STMicroelectronics uvis25 sensor driver
+ *
+ * Copyright 2017 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/iio/sysfs.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/interrupt.h>
+#include <linux/irqreturn.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/buffer.h>
+#include <linux/regmap.h>
+
+#include "st_uvis25.h"
+
+#define ST_UVIS25_REG_WHOAMI_ADDR 0x0f
+#define ST_UVIS25_REG_WHOAMI_VAL 0xca
+#define ST_UVIS25_REG_CTRL1_ADDR 0x20
+#define ST_UVIS25_REG_ODR_MASK BIT(0)
+#define ST_UVIS25_REG_BDU_MASK BIT(1)
+#define ST_UVIS25_REG_CTRL2_ADDR 0x21
+#define ST_UVIS25_REG_BOOT_MASK BIT(7)
+#define ST_UVIS25_REG_CTRL3_ADDR 0x22
+#define ST_UVIS25_REG_HL_MASK BIT(7)
+#define ST_UVIS25_REG_STATUS_ADDR 0x27
+#define ST_UVIS25_REG_UV_DA_MASK BIT(0)
+#define ST_UVIS25_REG_OUT_ADDR 0x28
+
+static const struct iio_chan_spec st_uvis25_channels[] = {
+ {
+ .type = IIO_UVINDEX,
+ .address = ST_UVIS25_REG_OUT_ADDR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ .scan_index = 0,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 8,
+ .storagebits = 8,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(1),
+};
+
+static int st_uvis25_check_whoami(struct st_uvis25_hw *hw)
+{
+ int err, data;
+
+ err = regmap_read(hw->regmap, ST_UVIS25_REG_WHOAMI_ADDR, &data);
+ if (err < 0) {
+ dev_err(regmap_get_device(hw->regmap),
+ "failed to read whoami register\n");
+ return err;
+ }
+
+ if (data != ST_UVIS25_REG_WHOAMI_VAL) {
+ dev_err(regmap_get_device(hw->regmap),
+ "wrong whoami {%02x vs %02x}\n",
+ data, ST_UVIS25_REG_WHOAMI_VAL);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int st_uvis25_set_enable(struct st_uvis25_hw *hw, bool enable)
+{
+ int err;
+
+ err = regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL1_ADDR,
+ ST_UVIS25_REG_ODR_MASK, enable);
+ if (err < 0)
+ return err;
+
+ hw->enabled = enable;
+
+ return 0;
+}
+
+static int st_uvis25_read_oneshot(struct st_uvis25_hw *hw, u8 addr, int *val)
+{
+ int err;
+
+ err = st_uvis25_set_enable(hw, true);
+ if (err < 0)
+ return err;
+
+ msleep(1500);
+
+ /*
+ * in order to avoid possible race conditions with interrupt
+ * generation, disable the sensor first and then poll output
+ * register. That sequence guarantees the interrupt will be reset
+ * when irq line is unmasked
+ */
+ err = st_uvis25_set_enable(hw, false);
+ if (err < 0)
+ return err;
+
+ err = regmap_read(hw->regmap, addr, val);
+
+ return err < 0 ? err : IIO_VAL_INT;
+}
+
+static int st_uvis25_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *ch,
+ int *val, int *val2, long mask)
+{
+ int ret;
+
+ ret = iio_device_claim_direct_mode(iio_dev);
+ if (ret)
+ return ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED: {
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+
+ /*
+ * mask irq line during oneshot read since the sensor
+ * does not export the capability to disable data-ready line
+ * in the register map and it is enabled by default.
+ * If the line is unmasked during read_raw() it will be set
+ * active and never reset since the trigger is disabled
+ */
+ if (hw->irq > 0)
+ disable_irq(hw->irq);
+ ret = st_uvis25_read_oneshot(hw, ch->address, val);
+ if (hw->irq > 0)
+ enable_irq(hw->irq);
+ break;
+ }
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ iio_device_release_direct_mode(iio_dev);
+
+ return ret;
+}
+
+static irqreturn_t st_uvis25_trigger_handler_thread(int irq, void *private)
+{
+ struct st_uvis25_hw *hw = private;
+ int err, status;
+
+ err = regmap_read(hw->regmap, ST_UVIS25_REG_STATUS_ADDR, &status);
+ if (err < 0)
+ return IRQ_HANDLED;
+
+ if (!(status & ST_UVIS25_REG_UV_DA_MASK))
+ return IRQ_NONE;
+
+ iio_trigger_poll_chained(hw->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int st_uvis25_allocate_trigger(struct iio_dev *iio_dev)
+{
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+ struct device *dev = regmap_get_device(hw->regmap);
+ bool irq_active_low = false;
+ unsigned long irq_type;
+ int err;
+
+ irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq));
+
+ switch (irq_type) {
+ case IRQF_TRIGGER_HIGH:
+ case IRQF_TRIGGER_RISING:
+ break;
+ case IRQF_TRIGGER_LOW:
+ case IRQF_TRIGGER_FALLING:
+ irq_active_low = true;
+ break;
+ default:
+ dev_info(dev, "mode %lx unsupported\n", irq_type);
+ return -EINVAL;
+ }
+
+ err = regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL3_ADDR,
+ ST_UVIS25_REG_HL_MASK, irq_active_low);
+ if (err < 0)
+ return err;
+
+ err = devm_request_threaded_irq(dev, hw->irq, NULL,
+ st_uvis25_trigger_handler_thread,
+ irq_type | IRQF_ONESHOT,
+ iio_dev->name, hw);
+ if (err) {
+ dev_err(dev, "failed to request trigger irq %d\n",
+ hw->irq);
+ return err;
+ }
+
+ hw->trig = devm_iio_trigger_alloc(dev, "%s-trigger",
+ iio_dev->name);
+ if (!hw->trig)
+ return -ENOMEM;
+
+ iio_trigger_set_drvdata(hw->trig, iio_dev);
+ hw->trig->dev.parent = dev;
+
+ return devm_iio_trigger_register(dev, hw->trig);
+}
+
+static int st_uvis25_buffer_preenable(struct iio_dev *iio_dev)
+{
+ return st_uvis25_set_enable(iio_priv(iio_dev), true);
+}
+
+static int st_uvis25_buffer_postdisable(struct iio_dev *iio_dev)
+{
+ return st_uvis25_set_enable(iio_priv(iio_dev), false);
+}
+
+static const struct iio_buffer_setup_ops st_uvis25_buffer_ops = {
+ .preenable = st_uvis25_buffer_preenable,
+ .postenable = iio_triggered_buffer_postenable,
+ .predisable = iio_triggered_buffer_predisable,
+ .postdisable = st_uvis25_buffer_postdisable,
+};
+
+static irqreturn_t st_uvis25_buffer_handler_thread(int irq, void *p)
+{
+ u8 buffer[ALIGN(sizeof(u8), sizeof(s64)) + sizeof(s64)];
+ struct iio_poll_func *pf = p;
+ struct iio_dev *iio_dev = pf->indio_dev;
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+ int err;
+
+ err = regmap_read(hw->regmap, ST_UVIS25_REG_OUT_ADDR, (int *)buffer);
+ if (err < 0)
+ goto out;
+
+ iio_push_to_buffers_with_timestamp(iio_dev, buffer,
+ iio_get_time_ns(iio_dev));
+
+out:
+ iio_trigger_notify_done(hw->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int st_uvis25_allocate_buffer(struct iio_dev *iio_dev)
+{
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+
+ return devm_iio_triggered_buffer_setup(regmap_get_device(hw->regmap),
+ iio_dev, NULL,
+ st_uvis25_buffer_handler_thread,
+ &st_uvis25_buffer_ops);
+}
+
+static const struct iio_info st_uvis25_info = {
+ .read_raw = st_uvis25_read_raw,
+};
+
+static int st_uvis25_init_sensor(struct st_uvis25_hw *hw)
+{
+ int err;
+
+ err = regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL2_ADDR,
+ ST_UVIS25_REG_BOOT_MASK, 1);
+ if (err < 0)
+ return err;
+
+ msleep(2000);
+
+ return regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL1_ADDR,
+ ST_UVIS25_REG_BDU_MASK, 1);
+}
+
+int st_uvis25_probe(struct device *dev, int irq, struct regmap *regmap)
+{
+ struct st_uvis25_hw *hw;
+ struct iio_dev *iio_dev;
+ int err;
+
+ iio_dev = devm_iio_device_alloc(dev, sizeof(*hw));
+ if (!iio_dev)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, (void *)iio_dev);
+
+ hw = iio_priv(iio_dev);
+ hw->irq = irq;
+ hw->regmap = regmap;
+
+ err = st_uvis25_check_whoami(hw);
+ if (err < 0)
+ return err;
+
+ iio_dev->modes = INDIO_DIRECT_MODE;
+ iio_dev->dev.parent = dev;
+ iio_dev->channels = st_uvis25_channels;
+ iio_dev->num_channels = ARRAY_SIZE(st_uvis25_channels);
+ iio_dev->name = ST_UVIS25_DEV_NAME;
+ iio_dev->info = &st_uvis25_info;
+
+ err = st_uvis25_init_sensor(hw);
+ if (err < 0)
+ return err;
+
+ if (hw->irq > 0) {
+ err = st_uvis25_allocate_buffer(iio_dev);
+ if (err < 0)
+ return err;
+
+ err = st_uvis25_allocate_trigger(iio_dev);
+ if (err)
+ return err;
+ }
+
+ return devm_iio_device_register(dev, iio_dev);
+}
+EXPORT_SYMBOL(st_uvis25_probe);
+
+static int __maybe_unused st_uvis25_suspend(struct device *dev)
+{
+ struct iio_dev *iio_dev = dev_get_drvdata(dev);
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+
+ return regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL1_ADDR,
+ ST_UVIS25_REG_ODR_MASK, 0);
+}
+
+static int __maybe_unused st_uvis25_resume(struct device *dev)
+{
+ struct iio_dev *iio_dev = dev_get_drvdata(dev);
+ struct st_uvis25_hw *hw = iio_priv(iio_dev);
+
+ if (hw->enabled)
+ return regmap_update_bits(hw->regmap, ST_UVIS25_REG_CTRL1_ADDR,
+ ST_UVIS25_REG_ODR_MASK, 1);
+
+ return 0;
+}
+
+const struct dev_pm_ops st_uvis25_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(st_uvis25_suspend, st_uvis25_resume)
+};
+EXPORT_SYMBOL(st_uvis25_pm_ops);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
+MODULE_DESCRIPTION("STMicroelectronics uvis25 sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/st_uvis25_i2c.c b/drivers/iio/light/st_uvis25_i2c.c
new file mode 100644
index 0000000..afd6eb0
--- /dev/null
+++ b/drivers/iio/light/st_uvis25_i2c.c
@@ -0,0 +1,69 @@
+/*
+ * STMicroelectronics uvis25 i2c driver
+ *
+ * Copyright 2017 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_uvis25.h"
+
+#define UVIS25_I2C_AUTO_INCREMENT BIT(7)
+
+static const struct regmap_config st_uvis25_i2c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .write_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
+ .read_flag_mask = UVIS25_I2C_AUTO_INCREMENT,
+};
+
+static int st_uvis25_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &st_uvis25_i2c_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Failed to register i2c regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_uvis25_probe(&client->dev, client->irq, regmap);
+}
+
+static const struct of_device_id st_uvis25_i2c_of_match[] = {
+ { .compatible = "st,uvis25", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_uvis25_i2c_of_match);
+
+static const struct i2c_device_id st_uvis25_i2c_id_table[] = {
+ { ST_UVIS25_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, st_uvis25_i2c_id_table);
+
+static struct i2c_driver st_uvis25_driver = {
+ .driver = {
+ .name = "st_uvis25_i2c",
+ .pm = &st_uvis25_pm_ops,
+ .of_match_table = of_match_ptr(st_uvis25_i2c_of_match),
+ },
+ .probe = st_uvis25_i2c_probe,
+ .id_table = st_uvis25_i2c_id_table,
+};
+module_i2c_driver(st_uvis25_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
+MODULE_DESCRIPTION("STMicroelectronics uvis25 i2c driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/st_uvis25_spi.c b/drivers/iio/light/st_uvis25_spi.c
new file mode 100644
index 0000000..cdfee5e
--- /dev/null
+++ b/drivers/iio/light/st_uvis25_spi.c
@@ -0,0 +1,68 @@
+/*
+ * STMicroelectronics uvis25 spi driver
+ *
+ * Copyright 2017 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_uvis25.h"
+
+#define UVIS25_SENSORS_SPI_READ BIT(7)
+#define UVIS25_SPI_AUTO_INCREMENT BIT(6)
+
+static const struct regmap_config st_uvis25_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .read_flag_mask = UVIS25_SENSORS_SPI_READ | UVIS25_SPI_AUTO_INCREMENT,
+ .write_flag_mask = UVIS25_SPI_AUTO_INCREMENT,
+};
+
+static int st_uvis25_spi_probe(struct spi_device *spi)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &st_uvis25_spi_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Failed to register spi regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_uvis25_probe(&spi->dev, spi->irq, regmap);
+}
+
+static const struct of_device_id st_uvis25_spi_of_match[] = {
+ { .compatible = "st,uvis25", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_uvis25_spi_of_match);
+
+static const struct spi_device_id st_uvis25_spi_id_table[] = {
+ { ST_UVIS25_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_uvis25_spi_id_table);
+
+static struct spi_driver st_uvis25_driver = {
+ .driver = {
+ .name = "st_uvis25_spi",
+ .pm = &st_uvis25_pm_ops,
+ .of_match_table = of_match_ptr(st_uvis25_spi_of_match),
+ },
+ .probe = st_uvis25_spi_probe,
+ .id_table = st_uvis25_spi_id_table,
+};
+module_spi_driver(st_uvis25_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
+MODULE_DESCRIPTION("STMicroelectronics uvis25 spi driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
new file mode 100644
index 0000000..6e2a169
--- /dev/null
+++ b/drivers/iio/light/stk3310.c
@@ -0,0 +1,696 @@
+/**
+ * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define STK3310_REG_STATE 0x00
+#define STK3310_REG_PSCTRL 0x01
+#define STK3310_REG_ALSCTRL 0x02
+#define STK3310_REG_INT 0x04
+#define STK3310_REG_THDH_PS 0x06
+#define STK3310_REG_THDL_PS 0x08
+#define STK3310_REG_FLAG 0x10
+#define STK3310_REG_PS_DATA_MSB 0x11
+#define STK3310_REG_PS_DATA_LSB 0x12
+#define STK3310_REG_ALS_DATA_MSB 0x13
+#define STK3310_REG_ALS_DATA_LSB 0x14
+#define STK3310_REG_ID 0x3E
+#define STK3310_MAX_REG 0x80
+
+#define STK3310_STATE_EN_PS BIT(0)
+#define STK3310_STATE_EN_ALS BIT(1)
+#define STK3310_STATE_STANDBY 0x00
+
+#define STK3310_CHIP_ID_VAL 0x13
+#define STK3311_CHIP_ID_VAL 0x1D
+#define STK3310_PSINT_EN 0x01
+#define STK3310_PS_MAX_VAL 0xFFFF
+
+#define STK3310_DRIVER_NAME "stk3310"
+#define STK3310_REGMAP_NAME "stk3310_regmap"
+#define STK3310_EVENT "stk3310_event"
+
+#define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1"
+
+#define STK3310_IT_AVAILABLE \
+ "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \
+ "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \
+ "3.031040 6.062080"
+
+#define STK3310_REGFIELD(name) \
+ do { \
+ data->reg_##name = \
+ devm_regmap_field_alloc(&client->dev, regmap, \
+ stk3310_reg_field_##name); \
+ if (IS_ERR(data->reg_##name)) { \
+ dev_err(&client->dev, "reg field alloc failed.\n"); \
+ return PTR_ERR(data->reg_##name); \
+ } \
+ } while (0)
+
+static const struct reg_field stk3310_reg_field_state =
+ REG_FIELD(STK3310_REG_STATE, 0, 2);
+static const struct reg_field stk3310_reg_field_als_gain =
+ REG_FIELD(STK3310_REG_ALSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_ps_gain =
+ REG_FIELD(STK3310_REG_PSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_als_it =
+ REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
+static const struct reg_field stk3310_reg_field_ps_it =
+ REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
+static const struct reg_field stk3310_reg_field_int_ps =
+ REG_FIELD(STK3310_REG_INT, 0, 2);
+static const struct reg_field stk3310_reg_field_flag_psint =
+ REG_FIELD(STK3310_REG_FLAG, 4, 4);
+static const struct reg_field stk3310_reg_field_flag_nf =
+ REG_FIELD(STK3310_REG_FLAG, 0, 0);
+
+/* Estimate maximum proximity values with regard to measurement scale. */
+static const int stk3310_ps_max[4] = {
+ STK3310_PS_MAX_VAL / 640,
+ STK3310_PS_MAX_VAL / 160,
+ STK3310_PS_MAX_VAL / 40,
+ STK3310_PS_MAX_VAL / 10
+};
+
+static const int stk3310_scale_table[][2] = {
+ {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000}
+};
+
+/* Integration time in seconds, microseconds */
+static const int stk3310_it_table[][2] = {
+ {0, 185}, {0, 370}, {0, 741}, {0, 1480},
+ {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680},
+ {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880},
+ {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080},
+};
+
+struct stk3310_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ bool als_enabled;
+ bool ps_enabled;
+ u64 timestamp;
+ struct regmap *regmap;
+ struct regmap_field *reg_state;
+ struct regmap_field *reg_als_gain;
+ struct regmap_field *reg_ps_gain;
+ struct regmap_field *reg_als_it;
+ struct regmap_field *reg_ps_it;
+ struct regmap_field *reg_int_ps;
+ struct regmap_field *reg_flag_psint;
+ struct regmap_field *reg_flag_nf;
+};
+
+static const struct iio_event_spec stk3310_events[] = {
+ /* Proximity event */
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ /* Out-of-proximity event */
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec stk3310_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .event_spec = stk3310_events,
+ .num_event_specs = ARRAY_SIZE(stk3310_events),
+ }
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+ STK3310_IT_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_integration_time_available,
+ STK3310_IT_AVAILABLE);
+
+static struct attribute *stk3310_attributes[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group stk3310_attribute_group = {
+ .attrs = stk3310_attributes
+};
+
+static int stk3310_get_index(const int table[][2], int table_size,
+ int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < table_size; i++) {
+ if (val == table[i][0] && val2 == table[i][1])
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int stk3310_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ u8 reg;
+ __be16 buf;
+ int ret;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ /* Only proximity interrupts are implemented at the moment. */
+ if (dir == IIO_EV_DIR_RISING)
+ reg = STK3310_REG_THDH_PS;
+ else if (dir == IIO_EV_DIR_FALLING)
+ reg = STK3310_REG_THDL_PS;
+ else
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ mutex_unlock(&data->lock);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "register read failed\n");
+ return ret;
+ }
+ *val = be16_to_cpu(buf);
+
+ return IIO_VAL_INT;
+}
+
+static int stk3310_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ u8 reg;
+ __be16 buf;
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ ret = regmap_field_read(data->reg_ps_gain, &index);
+ if (ret < 0)
+ return ret;
+
+ if (val < 0 || val > stk3310_ps_max[index])
+ return -EINVAL;
+
+ if (dir == IIO_EV_DIR_RISING)
+ reg = STK3310_REG_THDH_PS;
+ else if (dir == IIO_EV_DIR_FALLING)
+ reg = STK3310_REG_THDL_PS;
+ else
+ return -EINVAL;
+
+ buf = cpu_to_be16(val);
+ ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to set PS threshold!\n");
+
+ return ret;
+}
+
+static int stk3310_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ unsigned int event_val;
+ int ret;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ ret = regmap_field_read(data->reg_int_ps, &event_val);
+ if (ret < 0)
+ return ret;
+
+ return event_val;
+}
+
+static int stk3310_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ int ret;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ if (state < 0 || state > 7)
+ return -EINVAL;
+
+ /* Set INT_PS value */
+ mutex_lock(&data->lock);
+ ret = regmap_field_write(data->reg_int_ps, state);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to set interrupt mode\n");
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int stk3310_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ u8 reg;
+ __be16 buf;
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_LIGHT)
+ reg = STK3310_REG_ALS_DATA_MSB;
+ else
+ reg = STK3310_REG_PS_DATA_MSB;
+
+ mutex_lock(&data->lock);
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ if (ret < 0) {
+ dev_err(&client->dev, "register read failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ *val = be16_to_cpu(buf);
+ mutex_unlock(&data->lock);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_read(data->reg_als_it, &index);
+ else
+ ret = regmap_field_read(data->reg_ps_it, &index);
+ if (ret < 0)
+ return ret;
+
+ *val = stk3310_it_table[index][0];
+ *val2 = stk3310_it_table[index][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_read(data->reg_als_gain, &index);
+ else
+ ret = regmap_field_read(data->reg_ps_gain, &index);
+ if (ret < 0)
+ return ret;
+
+ *val = stk3310_scale_table[index][0];
+ *val2 = stk3310_scale_table[index][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+
+ return -EINVAL;
+}
+
+static int stk3310_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret;
+ int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ if (chan->type != IIO_LIGHT && chan->type != IIO_PROXIMITY)
+ return -EINVAL;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ index = stk3310_get_index(stk3310_it_table,
+ ARRAY_SIZE(stk3310_it_table),
+ val, val2);
+ if (index < 0)
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_write(data->reg_als_it, index);
+ else
+ ret = regmap_field_write(data->reg_ps_it, index);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "sensor configuration failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+
+ case IIO_CHAN_INFO_SCALE:
+ index = stk3310_get_index(stk3310_scale_table,
+ ARRAY_SIZE(stk3310_scale_table),
+ val, val2);
+ if (index < 0)
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_write(data->reg_als_gain, index);
+ else
+ ret = regmap_field_write(data->reg_ps_gain, index);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "sensor configuration failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_info stk3310_info = {
+ .read_raw = stk3310_read_raw,
+ .write_raw = stk3310_write_raw,
+ .attrs = &stk3310_attribute_group,
+ .read_event_value = stk3310_read_event,
+ .write_event_value = stk3310_write_event,
+ .read_event_config = stk3310_read_event_config,
+ .write_event_config = stk3310_write_event_config,
+};
+
+static int stk3310_set_state(struct stk3310_data *data, u8 state)
+{
+ int ret;
+ struct i2c_client *client = data->client;
+
+ /* 3-bit state; 0b100 is not supported. */
+ if (state > 7 || state == 4)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = regmap_field_write(data->reg_state, state);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to change sensor state\n");
+ } else if (state != STK3310_STATE_STANDBY) {
+ /* Don't reset the 'enabled' flags if we're going in standby */
+ data->ps_enabled = !!(state & STK3310_STATE_EN_PS);
+ data->als_enabled = !!(state & STK3310_STATE_EN_ALS);
+ }
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int stk3310_init(struct iio_dev *indio_dev)
+{
+ int ret;
+ int chipid;
+ u8 state;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);
+ if (ret < 0)
+ return ret;
+
+ if (chipid != STK3310_CHIP_ID_VAL &&
+ chipid != STK3311_CHIP_ID_VAL) {
+ dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
+ return -ENODEV;
+ }
+
+ state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
+ ret = stk3310_set_state(data, state);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to enable sensor");
+ return ret;
+ }
+
+ /* Enable PS interrupts */
+ ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to enable interrupts!\n");
+
+ return ret;
+}
+
+static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case STK3310_REG_ALS_DATA_MSB:
+ case STK3310_REG_ALS_DATA_LSB:
+ case STK3310_REG_PS_DATA_LSB:
+ case STK3310_REG_PS_DATA_MSB:
+ case STK3310_REG_FLAG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct regmap_config stk3310_regmap_config = {
+ .name = STK3310_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = STK3310_MAX_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = stk3310_is_volatile_reg,
+};
+
+static int stk3310_regmap_init(struct stk3310_data *data)
+{
+ struct regmap *regmap;
+ struct i2c_client *client;
+
+ client = data->client;
+ regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "regmap initialization failed.\n");
+ return PTR_ERR(regmap);
+ }
+ data->regmap = regmap;
+
+ STK3310_REGFIELD(state);
+ STK3310_REGFIELD(als_gain);
+ STK3310_REGFIELD(ps_gain);
+ STK3310_REGFIELD(als_it);
+ STK3310_REGFIELD(ps_it);
+ STK3310_REGFIELD(int_ps);
+ STK3310_REGFIELD(flag_psint);
+ STK3310_REGFIELD(flag_nf);
+
+ return 0;
+}
+
+static irqreturn_t stk3310_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ data->timestamp = iio_get_time_ns(indio_dev);
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t stk3310_irq_event_handler(int irq, void *private)
+{
+ int ret;
+ unsigned int dir;
+ u64 event;
+
+ struct iio_dev *indio_dev = private;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ /* Read FLAG_NF to figure out what threshold has been met. */
+ mutex_lock(&data->lock);
+ ret = regmap_field_read(data->reg_flag_nf, &dir);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "register read failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1,
+ IIO_EV_TYPE_THRESH,
+ (dir ? IIO_EV_DIR_FALLING :
+ IIO_EV_DIR_RISING));
+ iio_push_event(indio_dev, event, data->timestamp);
+
+ /* Reset the interrupt flag */
+ ret = regmap_field_write(data->reg_flag_psint, 0);
+ if (ret < 0)
+ dev_err(&data->client->dev, "failed to reset interrupts\n");
+ mutex_unlock(&data->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int stk3310_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct iio_dev *indio_dev;
+ struct stk3310_data *data;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev) {
+ dev_err(&client->dev, "iio allocation failed!\n");
+ return -ENOMEM;
+ }
+
+ data = iio_priv(indio_dev);
+ data->client = client;
+ i2c_set_clientdata(client, indio_dev);
+ mutex_init(&data->lock);
+
+ ret = stk3310_regmap_init(data);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &stk3310_info;
+ indio_dev->name = STK3310_DRIVER_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = stk3310_channels;
+ indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);
+
+ ret = stk3310_init(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq > 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ stk3310_irq_handler,
+ stk3310_irq_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ STK3310_EVENT, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "request irq %d failed\n",
+ client->irq);
+ goto err_standby;
+ }
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "device_register failed\n");
+ goto err_standby;
+ }
+
+ return 0;
+
+err_standby:
+ stk3310_set_state(data, STK3310_STATE_STANDBY);
+ return ret;
+}
+
+static int stk3310_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ return stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stk3310_suspend(struct device *dev)
+{
+ struct stk3310_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ return stk3310_set_state(data, STK3310_STATE_STANDBY);
+}
+
+static int stk3310_resume(struct device *dev)
+{
+ u8 state = 0;
+ struct stk3310_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+ if (data->ps_enabled)
+ state |= STK3310_STATE_EN_PS;
+ if (data->als_enabled)
+ state |= STK3310_STATE_EN_ALS;
+
+ return stk3310_set_state(data, state);
+}
+
+static SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, stk3310_resume);
+
+#define STK3310_PM_OPS (&stk3310_pm_ops)
+#else
+#define STK3310_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id stk3310_i2c_id[] = {
+ {"STK3310", 0},
+ {"STK3311", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, stk3310_i2c_id);
+
+static const struct acpi_device_id stk3310_acpi_id[] = {
+ {"STK3310", 0},
+ {"STK3311", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id);
+
+static struct i2c_driver stk3310_driver = {
+ .driver = {
+ .name = "stk3310",
+ .pm = STK3310_PM_OPS,
+ .acpi_match_table = ACPI_PTR(stk3310_acpi_id),
+ },
+ .probe = stk3310_probe,
+ .remove = stk3310_remove,
+ .id_table = stk3310_i2c_id,
+};
+
+module_i2c_driver(stk3310_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
new file mode 100644
index 0000000..205e565
--- /dev/null
+++ b/drivers/iio/light/tcs3414.c
@@ -0,0 +1,401 @@
+/*
+ * tcs3414.c - Support for TAOS TCS3414 digital color sensor
+ *
+ * Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Digital color sensor with 16-bit channels for red, green, blue, clear);
+ * 7-bit I2C slave address 0x39 (TCS3414) or 0x29, 0x49, 0x59 (TCS3413,
+ * TCS3415, TCS3416, resp.)
+ *
+ * TODO: sync, interrupt support, thresholds, prescaler
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define TCS3414_DRV_NAME "tcs3414"
+
+#define TCS3414_COMMAND BIT(7)
+#define TCS3414_COMMAND_WORD (TCS3414_COMMAND | BIT(5))
+
+#define TCS3414_CONTROL (TCS3414_COMMAND | 0x00)
+#define TCS3414_TIMING (TCS3414_COMMAND | 0x01)
+#define TCS3414_ID (TCS3414_COMMAND | 0x04)
+#define TCS3414_GAIN (TCS3414_COMMAND | 0x07)
+#define TCS3414_DATA_GREEN (TCS3414_COMMAND_WORD | 0x10)
+#define TCS3414_DATA_RED (TCS3414_COMMAND_WORD | 0x12)
+#define TCS3414_DATA_BLUE (TCS3414_COMMAND_WORD | 0x14)
+#define TCS3414_DATA_CLEAR (TCS3414_COMMAND_WORD | 0x16)
+
+#define TCS3414_CONTROL_ADC_VALID BIT(4)
+#define TCS3414_CONTROL_ADC_EN BIT(1)
+#define TCS3414_CONTROL_POWER BIT(0)
+
+#define TCS3414_INTEG_MASK GENMASK(1, 0)
+#define TCS3414_INTEG_12MS 0x0
+#define TCS3414_INTEG_100MS 0x1
+#define TCS3414_INTEG_400MS 0x2
+
+#define TCS3414_GAIN_MASK GENMASK(5, 4)
+#define TCS3414_GAIN_SHIFT 4
+
+struct tcs3414_data {
+ struct i2c_client *client;
+ u8 control;
+ u8 gain;
+ u8 timing;
+ u16 buffer[8]; /* 4x 16-bit + 8 bytes timestamp */
+};
+
+#define TCS3414_CHANNEL(_color, _si, _addr) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+ .address = _addr, \
+ .scan_index = _si, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+}
+
+/* scale factors: 1/gain */
+static const int tcs3414_scales[][2] = {
+ {1, 0}, {0, 250000}, {0, 62500}, {0, 15625}
+};
+
+/* integration time in ms */
+static const int tcs3414_times[] = { 12, 100, 400 };
+
+static const struct iio_chan_spec tcs3414_channels[] = {
+ TCS3414_CHANNEL(GREEN, 0, TCS3414_DATA_GREEN),
+ TCS3414_CHANNEL(RED, 1, TCS3414_DATA_RED),
+ TCS3414_CHANNEL(BLUE, 2, TCS3414_DATA_BLUE),
+ TCS3414_CHANNEL(CLEAR, 3, TCS3414_DATA_CLEAR),
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static int tcs3414_req_data(struct tcs3414_data *data)
+{
+ int tries = 25;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control | TCS3414_CONTROL_ADC_EN);
+ if (ret < 0)
+ return ret;
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, TCS3414_CONTROL);
+ if (ret < 0)
+ return ret;
+ if (ret & TCS3414_CONTROL_ADC_VALID)
+ break;
+ msleep(20);
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control);
+ if (ret < 0)
+ return ret;
+
+ if (tries < 0) {
+ dev_err(&data->client->dev, "data not ready\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int tcs3414_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tcs3414_data *data = iio_priv(indio_dev);
+ int i, ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = tcs3414_req_data(data);
+ if (ret < 0) {
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ }
+ ret = i2c_smbus_read_word_data(data->client, chan->address);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ i = (data->gain & TCS3414_GAIN_MASK) >> TCS3414_GAIN_SHIFT;
+ *val = tcs3414_scales[i][0];
+ *val2 = tcs3414_scales[i][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = tcs3414_times[data->timing & TCS3414_INTEG_MASK] * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int tcs3414_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tcs3414_data *data = iio_priv(indio_dev);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ for (i = 0; i < ARRAY_SIZE(tcs3414_scales); i++) {
+ if (val == tcs3414_scales[i][0] &&
+ val2 == tcs3414_scales[i][1]) {
+ data->gain &= ~TCS3414_GAIN_MASK;
+ data->gain |= i << TCS3414_GAIN_SHIFT;
+ return i2c_smbus_write_byte_data(
+ data->client, TCS3414_GAIN,
+ data->gain);
+ }
+ }
+ return -EINVAL;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(tcs3414_times); i++) {
+ if (val2 == tcs3414_times[i] * 1000) {
+ data->timing &= ~TCS3414_INTEG_MASK;
+ data->timing |= i;
+ return i2c_smbus_write_byte_data(
+ data->client, TCS3414_TIMING,
+ data->timing);
+ }
+ }
+ return -EINVAL;
+ default:
+ return -EINVAL;
+ }
+}
+
+static irqreturn_t tcs3414_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct tcs3414_data *data = iio_priv(indio_dev);
+ int i, j = 0;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ int ret = i2c_smbus_read_word_data(data->client,
+ TCS3414_DATA_GREEN + 2*i);
+ if (ret < 0)
+ goto done;
+
+ data->buffer[j++] = ret;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static IIO_CONST_ATTR(scale_available, "1 0.25 0.0625 0.015625");
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.012 0.1 0.4");
+
+static struct attribute *tcs3414_attributes[] = {
+ &iio_const_attr_scale_available.dev_attr.attr,
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tcs3414_attribute_group = {
+ .attrs = tcs3414_attributes,
+};
+
+static const struct iio_info tcs3414_info = {
+ .read_raw = tcs3414_read_raw,
+ .write_raw = tcs3414_write_raw,
+ .attrs = &tcs3414_attribute_group,
+};
+
+static int tcs3414_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct tcs3414_data *data = iio_priv(indio_dev);
+
+ data->control |= TCS3414_CONTROL_ADC_EN;
+ return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control);
+}
+
+static int tcs3414_buffer_predisable(struct iio_dev *indio_dev)
+{
+ struct tcs3414_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = iio_triggered_buffer_predisable(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ data->control &= ~TCS3414_CONTROL_ADC_EN;
+ return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control);
+}
+
+static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = {
+ .preenable = tcs3414_buffer_preenable,
+ .postenable = &iio_triggered_buffer_postenable,
+ .predisable = tcs3414_buffer_predisable,
+};
+
+static int tcs3414_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tcs3414_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &tcs3414_info;
+ indio_dev->name = TCS3414_DRV_NAME;
+ indio_dev->channels = tcs3414_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tcs3414_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3414_ID);
+ if (ret < 0)
+ return ret;
+
+ switch (ret & 0xf0) {
+ case 0x00:
+ dev_info(&client->dev, "TCS3404 found\n");
+ break;
+ case 0x10:
+ dev_info(&client->dev, "TCS3413/14/15/16 found\n");
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ data->control = TCS3414_CONTROL_POWER;
+ ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control);
+ if (ret < 0)
+ return ret;
+
+ data->timing = TCS3414_INTEG_12MS; /* free running */
+ ret = i2c_smbus_write_byte_data(data->client, TCS3414_TIMING,
+ data->timing);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3414_GAIN);
+ if (ret < 0)
+ return ret;
+ data->gain = ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ tcs3414_trigger_handler, &tcs3414_buffer_setup_ops);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto buffer_cleanup;
+
+ return 0;
+
+buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int tcs3414_powerdown(struct tcs3414_data *data)
+{
+ return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control & ~(TCS3414_CONTROL_POWER |
+ TCS3414_CONTROL_ADC_EN));
+}
+
+static int tcs3414_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ tcs3414_powerdown(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tcs3414_suspend(struct device *dev)
+{
+ struct tcs3414_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return tcs3414_powerdown(data);
+}
+
+static int tcs3414_resume(struct device *dev)
+{
+ struct tcs3414_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+ data->control);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tcs3414_pm_ops, tcs3414_suspend, tcs3414_resume);
+
+static const struct i2c_device_id tcs3414_id[] = {
+ { "tcs3414", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tcs3414_id);
+
+static struct i2c_driver tcs3414_driver = {
+ .driver = {
+ .name = TCS3414_DRV_NAME,
+ .pm = &tcs3414_pm_ops,
+ },
+ .probe = tcs3414_probe,
+ .remove = tcs3414_remove,
+ .id_table = tcs3414_id,
+};
+module_i2c_driver(tcs3414_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("TCS3414 digital color sensors driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c
new file mode 100644
index 0000000..e7923b5
--- /dev/null
+++ b/drivers/iio/light/tcs3472.c
@@ -0,0 +1,622 @@
+/*
+ * tcs3472.c - Support for TAOS TCS3472 color light-to-digital converter
+ *
+ * Copyright (c) 2013 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Color light sensor with 16-bit channels for red, green, blue, clear);
+ * 7-bit I2C slave address 0x39 (TCS34721, TCS34723) or 0x29 (TCS34725,
+ * TCS34727)
+ *
+ * Datasheet: http://ams.com/eng/content/download/319364/1117183/file/TCS3472_Datasheet_EN_v2.pdf
+ *
+ * TODO: wait time
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define TCS3472_DRV_NAME "tcs3472"
+
+#define TCS3472_COMMAND BIT(7)
+#define TCS3472_AUTO_INCR BIT(5)
+#define TCS3472_SPECIAL_FUNC (BIT(5) | BIT(6))
+
+#define TCS3472_INTR_CLEAR (TCS3472_COMMAND | TCS3472_SPECIAL_FUNC | 0x06)
+
+#define TCS3472_ENABLE (TCS3472_COMMAND | 0x00)
+#define TCS3472_ATIME (TCS3472_COMMAND | 0x01)
+#define TCS3472_WTIME (TCS3472_COMMAND | 0x03)
+#define TCS3472_AILT (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x04)
+#define TCS3472_AIHT (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x06)
+#define TCS3472_PERS (TCS3472_COMMAND | 0x0c)
+#define TCS3472_CONFIG (TCS3472_COMMAND | 0x0d)
+#define TCS3472_CONTROL (TCS3472_COMMAND | 0x0f)
+#define TCS3472_ID (TCS3472_COMMAND | 0x12)
+#define TCS3472_STATUS (TCS3472_COMMAND | 0x13)
+#define TCS3472_CDATA (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x14)
+#define TCS3472_RDATA (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x16)
+#define TCS3472_GDATA (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x18)
+#define TCS3472_BDATA (TCS3472_COMMAND | TCS3472_AUTO_INCR | 0x1a)
+
+#define TCS3472_STATUS_AINT BIT(4)
+#define TCS3472_STATUS_AVALID BIT(0)
+#define TCS3472_ENABLE_AIEN BIT(4)
+#define TCS3472_ENABLE_AEN BIT(1)
+#define TCS3472_ENABLE_PON BIT(0)
+#define TCS3472_CONTROL_AGAIN_MASK (BIT(0) | BIT(1))
+
+struct tcs3472_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ u16 low_thresh;
+ u16 high_thresh;
+ u8 enable;
+ u8 control;
+ u8 atime;
+ u8 apers;
+ u16 buffer[8]; /* 4 16-bit channels + 64-bit timestamp */
+};
+
+static const struct iio_event_spec tcs3472_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_PERIOD),
+ },
+};
+
+#define TCS3472_CHANNEL(_color, _si, _addr) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_CALIBSCALE) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+ .channel2 = IIO_MOD_LIGHT_##_color, \
+ .address = _addr, \
+ .scan_index = _si, \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ }, \
+ .event_spec = _si ? NULL : tcs3472_events, \
+ .num_event_specs = _si ? 0 : ARRAY_SIZE(tcs3472_events), \
+}
+
+static const int tcs3472_agains[] = { 1, 4, 16, 60 };
+
+static const struct iio_chan_spec tcs3472_channels[] = {
+ TCS3472_CHANNEL(CLEAR, 0, TCS3472_CDATA),
+ TCS3472_CHANNEL(RED, 1, TCS3472_RDATA),
+ TCS3472_CHANNEL(GREEN, 2, TCS3472_GDATA),
+ TCS3472_CHANNEL(BLUE, 3, TCS3472_BDATA),
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static int tcs3472_req_data(struct tcs3472_data *data)
+{
+ int tries = 50;
+ int ret;
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_STATUS);
+ if (ret < 0)
+ return ret;
+ if (ret & TCS3472_STATUS_AVALID)
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev, "data not ready\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int tcs3472_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = tcs3472_req_data(data);
+ if (ret < 0) {
+ iio_device_release_direct_mode(indio_dev);
+ return ret;
+ }
+ ret = i2c_smbus_read_word_data(data->client, chan->address);
+ iio_device_release_direct_mode(indio_dev);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ *val = tcs3472_agains[data->control &
+ TCS3472_CONTROL_AGAIN_MASK];
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = (256 - data->atime) * 2400;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int tcs3472_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (val2 != 0)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(tcs3472_agains); i++) {
+ if (val == tcs3472_agains[i]) {
+ data->control &= ~TCS3472_CONTROL_AGAIN_MASK;
+ data->control |= i;
+ return i2c_smbus_write_byte_data(
+ data->client, TCS3472_CONTROL,
+ data->control);
+ }
+ }
+ return -EINVAL;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+ for (i = 0; i < 256; i++) {
+ if (val2 == (256 - i) * 2400) {
+ data->atime = i;
+ return i2c_smbus_write_byte_data(
+ data->client, TCS3472_ATIME,
+ data->atime);
+ }
+
+ }
+ return -EINVAL;
+ }
+ return -EINVAL;
+}
+
+/*
+ * Translation from APERS field value to the number of consecutive out-of-range
+ * clear channel values before an interrupt is generated
+ */
+static const int tcs3472_intr_pers[] = {
+ 0, 1, 2, 3, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60
+};
+
+static int tcs3472_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int *val,
+ int *val2)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret;
+ unsigned int period;
+
+ mutex_lock(&data->lock);
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ *val = (dir == IIO_EV_DIR_RISING) ?
+ data->high_thresh : data->low_thresh;
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ period = (256 - data->atime) * 2400 *
+ tcs3472_intr_pers[data->apers];
+ *val = period / USEC_PER_SEC;
+ *val2 = period % USEC_PER_SEC;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int tcs3472_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int val,
+ int val2)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret;
+ u8 command;
+ int period;
+ int i;
+
+ mutex_lock(&data->lock);
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ command = TCS3472_AIHT;
+ break;
+ case IIO_EV_DIR_FALLING:
+ command = TCS3472_AILT;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error;
+ }
+ ret = i2c_smbus_write_word_data(data->client, command, val);
+ if (ret)
+ goto error;
+
+ if (dir == IIO_EV_DIR_RISING)
+ data->high_thresh = val;
+ else
+ data->low_thresh = val;
+ break;
+ case IIO_EV_INFO_PERIOD:
+ period = val * USEC_PER_SEC + val2;
+ for (i = 1; i < ARRAY_SIZE(tcs3472_intr_pers) - 1; i++) {
+ if (period <= (256 - data->atime) * 2400 *
+ tcs3472_intr_pers[i])
+ break;
+ }
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_PERS, i);
+ if (ret)
+ goto error;
+
+ data->apers = i;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+error:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int tcs3472_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = !!(data->enable & TCS3472_ENABLE_AIEN);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int tcs3472_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret = 0;
+ u8 enable_old;
+
+ mutex_lock(&data->lock);
+
+ enable_old = data->enable;
+
+ if (state)
+ data->enable |= TCS3472_ENABLE_AIEN;
+ else
+ data->enable &= ~TCS3472_ENABLE_AIEN;
+
+ if (enable_old != data->enable) {
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_ENABLE,
+ data->enable);
+ if (ret)
+ data->enable = enable_old;
+ }
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static irqreturn_t tcs3472_event_handler(int irq, void *priv)
+{
+ struct iio_dev *indio_dev = priv;
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_STATUS);
+ if (ret >= 0 && (ret & TCS3472_STATUS_AINT)) {
+ iio_push_event(indio_dev, IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(indio_dev));
+
+ i2c_smbus_read_byte_data(data->client, TCS3472_INTR_CLEAR);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t tcs3472_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct tcs3472_data *data = iio_priv(indio_dev);
+ int i, j = 0;
+
+ int ret = tcs3472_req_data(data);
+ if (ret < 0)
+ goto done;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = i2c_smbus_read_word_data(data->client,
+ TCS3472_CDATA + 2*i);
+ if (ret < 0)
+ goto done;
+
+ data->buffer[j++] = ret;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
+ iio_get_time_ns(indio_dev));
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t tcs3472_show_int_time_available(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = 1; i <= 256; i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06d ",
+ 2400 * i);
+
+ /* replace trailing space by newline */
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_CONST_ATTR(calibscale_available, "1 4 16 60");
+static IIO_DEV_ATTR_INT_TIME_AVAIL(tcs3472_show_int_time_available);
+
+static struct attribute *tcs3472_attributes[] = {
+ &iio_const_attr_calibscale_available.dev_attr.attr,
+ &iio_dev_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tcs3472_attribute_group = {
+ .attrs = tcs3472_attributes,
+};
+
+static const struct iio_info tcs3472_info = {
+ .read_raw = tcs3472_read_raw,
+ .write_raw = tcs3472_write_raw,
+ .read_event_value = tcs3472_read_event,
+ .write_event_value = tcs3472_write_event,
+ .read_event_config = tcs3472_read_event_config,
+ .write_event_config = tcs3472_write_event_config,
+ .attrs = &tcs3472_attribute_group,
+};
+
+static int tcs3472_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tcs3472_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &tcs3472_info;
+ indio_dev->name = TCS3472_DRV_NAME;
+ indio_dev->channels = tcs3472_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tcs3472_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_ID);
+ if (ret < 0)
+ return ret;
+
+ if (ret == 0x44)
+ dev_info(&client->dev, "TCS34721/34725 found\n");
+ else if (ret == 0x4d)
+ dev_info(&client->dev, "TCS34723/34727 found\n");
+ else
+ return -ENODEV;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_CONTROL);
+ if (ret < 0)
+ return ret;
+ data->control = ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_ATIME);
+ if (ret < 0)
+ return ret;
+ data->atime = ret;
+
+ ret = i2c_smbus_read_word_data(data->client, TCS3472_AILT);
+ if (ret < 0)
+ return ret;
+ data->low_thresh = ret;
+
+ ret = i2c_smbus_read_word_data(data->client, TCS3472_AIHT);
+ if (ret < 0)
+ return ret;
+ data->high_thresh = ret;
+
+ data->apers = 1;
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_PERS,
+ data->apers);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, TCS3472_ENABLE);
+ if (ret < 0)
+ return ret;
+
+ /* enable device */
+ data->enable = ret | TCS3472_ENABLE_PON | TCS3472_ENABLE_AEN;
+ data->enable &= ~TCS3472_ENABLE_AIEN;
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_ENABLE,
+ data->enable);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ tcs3472_trigger_handler, NULL);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq) {
+ ret = request_threaded_irq(client->irq, NULL,
+ tcs3472_event_handler,
+ IRQF_TRIGGER_FALLING | IRQF_SHARED |
+ IRQF_ONESHOT,
+ client->name, indio_dev);
+ if (ret)
+ goto buffer_cleanup;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto free_irq;
+
+ return 0;
+
+free_irq:
+ free_irq(client->irq, indio_dev);
+buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int tcs3472_powerdown(struct tcs3472_data *data)
+{
+ int ret;
+ u8 enable_mask = TCS3472_ENABLE_AEN | TCS3472_ENABLE_PON;
+
+ mutex_lock(&data->lock);
+
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_ENABLE,
+ data->enable & ~enable_mask);
+ if (!ret)
+ data->enable &= ~enable_mask;
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int tcs3472_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ free_irq(client->irq, indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ tcs3472_powerdown(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tcs3472_suspend(struct device *dev)
+{
+ struct tcs3472_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return tcs3472_powerdown(data);
+}
+
+static int tcs3472_resume(struct device *dev)
+{
+ struct tcs3472_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ int ret;
+ u8 enable_mask = TCS3472_ENABLE_AEN | TCS3472_ENABLE_PON;
+
+ mutex_lock(&data->lock);
+
+ ret = i2c_smbus_write_byte_data(data->client, TCS3472_ENABLE,
+ data->enable | enable_mask);
+ if (!ret)
+ data->enable |= enable_mask;
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tcs3472_pm_ops, tcs3472_suspend, tcs3472_resume);
+
+static const struct i2c_device_id tcs3472_id[] = {
+ { "tcs3472", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tcs3472_id);
+
+static struct i2c_driver tcs3472_driver = {
+ .driver = {
+ .name = TCS3472_DRV_NAME,
+ .pm = &tcs3472_pm_ops,
+ },
+ .probe = tcs3472_probe,
+ .remove = tcs3472_remove,
+ .id_table = tcs3472_id,
+};
+module_i2c_driver(tcs3472_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("TCS3472 color light sensors driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
new file mode 100644
index 0000000..6bbb0b1
--- /dev/null
+++ b/drivers/iio/light/tsl2563.c
@@ -0,0 +1,908 @@
+/*
+ * drivers/iio/light/tsl2563.c
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Written by Timo O. Karjalainen <timo.o.karjalainen@nokia.com>
+ * Contact: Amit Kucheria <amit.kucheria@verdurent.com>
+ *
+ * Converted to IIO driver
+ * Amit Kucheria <amit.kucheria@verdurent.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/platform_data/tsl2563.h>
+
+/* Use this many bits for fraction part. */
+#define ADC_FRAC_BITS 14
+
+/* Given number of 1/10000's in ADC_FRAC_BITS precision. */
+#define FRAC10K(f) (((f) * (1L << (ADC_FRAC_BITS))) / (10000))
+
+/* Bits used for fraction in calibration coefficients.*/
+#define CALIB_FRAC_BITS 10
+/* 0.5 in CALIB_FRAC_BITS precision */
+#define CALIB_FRAC_HALF (1 << (CALIB_FRAC_BITS - 1))
+/* Make a fraction from a number n that was multiplied with b. */
+#define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b))
+/* Decimal 10^(digits in sysfs presentation) */
+#define CALIB_BASE_SYSFS 1000
+
+#define TSL2563_CMD 0x80
+#define TSL2563_CLEARINT 0x40
+
+#define TSL2563_REG_CTRL 0x00
+#define TSL2563_REG_TIMING 0x01
+#define TSL2563_REG_LOWLOW 0x02 /* data0 low threshold, 2 bytes */
+#define TSL2563_REG_LOWHIGH 0x03
+#define TSL2563_REG_HIGHLOW 0x04 /* data0 high threshold, 2 bytes */
+#define TSL2563_REG_HIGHHIGH 0x05
+#define TSL2563_REG_INT 0x06
+#define TSL2563_REG_ID 0x0a
+#define TSL2563_REG_DATA0LOW 0x0c /* broadband sensor value, 2 bytes */
+#define TSL2563_REG_DATA0HIGH 0x0d
+#define TSL2563_REG_DATA1LOW 0x0e /* infrared sensor value, 2 bytes */
+#define TSL2563_REG_DATA1HIGH 0x0f
+
+#define TSL2563_CMD_POWER_ON 0x03
+#define TSL2563_CMD_POWER_OFF 0x00
+#define TSL2563_CTRL_POWER_MASK 0x03
+
+#define TSL2563_TIMING_13MS 0x00
+#define TSL2563_TIMING_100MS 0x01
+#define TSL2563_TIMING_400MS 0x02
+#define TSL2563_TIMING_MASK 0x03
+#define TSL2563_TIMING_GAIN16 0x10
+#define TSL2563_TIMING_GAIN1 0x00
+
+#define TSL2563_INT_DISBLED 0x00
+#define TSL2563_INT_LEVEL 0x10
+#define TSL2563_INT_PERSIST(n) ((n) & 0x0F)
+
+struct tsl2563_gainlevel_coeff {
+ u8 gaintime;
+ u16 min;
+ u16 max;
+};
+
+static const struct tsl2563_gainlevel_coeff tsl2563_gainlevel_table[] = {
+ {
+ .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN16,
+ .min = 0,
+ .max = 65534,
+ }, {
+ .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN1,
+ .min = 2048,
+ .max = 65534,
+ }, {
+ .gaintime = TSL2563_TIMING_100MS | TSL2563_TIMING_GAIN1,
+ .min = 4095,
+ .max = 37177,
+ }, {
+ .gaintime = TSL2563_TIMING_13MS | TSL2563_TIMING_GAIN1,
+ .min = 3000,
+ .max = 65535,
+ },
+};
+
+struct tsl2563_chip {
+ struct mutex lock;
+ struct i2c_client *client;
+ struct delayed_work poweroff_work;
+
+ /* Remember state for suspend and resume functions */
+ bool suspended;
+
+ struct tsl2563_gainlevel_coeff const *gainlevel;
+
+ u16 low_thres;
+ u16 high_thres;
+ u8 intr;
+ bool int_enabled;
+
+ /* Calibration coefficients */
+ u32 calib0;
+ u32 calib1;
+ int cover_comp_gain;
+
+ /* Cache current values, to be returned while suspended */
+ u32 data0;
+ u32 data1;
+};
+
+static int tsl2563_set_power(struct tsl2563_chip *chip, int on)
+{
+ struct i2c_client *client = chip->client;
+ u8 cmd;
+
+ cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF;
+ return i2c_smbus_write_byte_data(client,
+ TSL2563_CMD | TSL2563_REG_CTRL, cmd);
+}
+
+/*
+ * Return value is 0 for off, 1 for on, or a negative error
+ * code if reading failed.
+ */
+static int tsl2563_get_power(struct tsl2563_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_CTRL);
+ if (ret < 0)
+ return ret;
+
+ return (ret & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON;
+}
+
+static int tsl2563_configure(struct tsl2563_chip *chip)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_TIMING,
+ chip->gainlevel->gaintime);
+ if (ret)
+ goto error_ret;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_HIGHLOW,
+ chip->high_thres & 0xFF);
+ if (ret)
+ goto error_ret;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_HIGHHIGH,
+ (chip->high_thres >> 8) & 0xFF);
+ if (ret)
+ goto error_ret;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_LOWLOW,
+ chip->low_thres & 0xFF);
+ if (ret)
+ goto error_ret;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_LOWHIGH,
+ (chip->low_thres >> 8) & 0xFF);
+/*
+ * Interrupt register is automatically written anyway if it is relevant
+ * so is not here.
+ */
+error_ret:
+ return ret;
+}
+
+static void tsl2563_poweroff_work(struct work_struct *work)
+{
+ struct tsl2563_chip *chip =
+ container_of(work, struct tsl2563_chip, poweroff_work.work);
+ tsl2563_set_power(chip, 0);
+}
+
+static int tsl2563_detect(struct tsl2563_chip *chip)
+{
+ int ret;
+
+ ret = tsl2563_set_power(chip, 1);
+ if (ret)
+ return ret;
+
+ ret = tsl2563_get_power(chip);
+ if (ret < 0)
+ return ret;
+
+ return ret ? 0 : -ENODEV;
+}
+
+static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
+{
+ struct i2c_client *client = chip->client;
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
+ if (ret < 0)
+ return ret;
+
+ *id = ret;
+
+ return 0;
+}
+
+/*
+ * "Normalized" ADC value is one obtained with 400ms of integration time and
+ * 16x gain. This function returns the number of bits of shift needed to
+ * convert between normalized values and HW values obtained using given
+ * timing and gain settings.
+ */
+static int tsl2563_adc_shiftbits(u8 timing)
+{
+ int shift = 0;
+
+ switch (timing & TSL2563_TIMING_MASK) {
+ case TSL2563_TIMING_13MS:
+ shift += 5;
+ break;
+ case TSL2563_TIMING_100MS:
+ shift += 2;
+ break;
+ case TSL2563_TIMING_400MS:
+ /* no-op */
+ break;
+ }
+
+ if (!(timing & TSL2563_TIMING_GAIN16))
+ shift += 4;
+
+ return shift;
+}
+
+/* Convert a HW ADC value to normalized scale. */
+static u32 tsl2563_normalize_adc(u16 adc, u8 timing)
+{
+ return adc << tsl2563_adc_shiftbits(timing);
+}
+
+static void tsl2563_wait_adc(struct tsl2563_chip *chip)
+{
+ unsigned int delay;
+
+ switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) {
+ case TSL2563_TIMING_13MS:
+ delay = 14;
+ break;
+ case TSL2563_TIMING_100MS:
+ delay = 101;
+ break;
+ default:
+ delay = 402;
+ }
+ /*
+ * TODO: Make sure that we wait at least required delay but why we
+ * have to extend it one tick more?
+ */
+ schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2);
+}
+
+static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc)
+{
+ struct i2c_client *client = chip->client;
+
+ if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) {
+
+ (adc > chip->gainlevel->max) ?
+ chip->gainlevel++ : chip->gainlevel--;
+
+ i2c_smbus_write_byte_data(client,
+ TSL2563_CMD | TSL2563_REG_TIMING,
+ chip->gainlevel->gaintime);
+
+ tsl2563_wait_adc(chip);
+ tsl2563_wait_adc(chip);
+
+ return 1;
+ } else
+ return 0;
+}
+
+static int tsl2563_get_adc(struct tsl2563_chip *chip)
+{
+ struct i2c_client *client = chip->client;
+ u16 adc0, adc1;
+ int retry = 1;
+ int ret = 0;
+
+ if (chip->suspended)
+ goto out;
+
+ if (!chip->int_enabled) {
+ cancel_delayed_work(&chip->poweroff_work);
+
+ if (!tsl2563_get_power(chip)) {
+ ret = tsl2563_set_power(chip, 1);
+ if (ret)
+ goto out;
+ ret = tsl2563_configure(chip);
+ if (ret)
+ goto out;
+ tsl2563_wait_adc(chip);
+ }
+ }
+
+ while (retry) {
+ ret = i2c_smbus_read_word_data(client,
+ TSL2563_CMD | TSL2563_REG_DATA0LOW);
+ if (ret < 0)
+ goto out;
+ adc0 = ret;
+
+ ret = i2c_smbus_read_word_data(client,
+ TSL2563_CMD | TSL2563_REG_DATA1LOW);
+ if (ret < 0)
+ goto out;
+ adc1 = ret;
+
+ retry = tsl2563_adjust_gainlevel(chip, adc0);
+ }
+
+ chip->data0 = tsl2563_normalize_adc(adc0, chip->gainlevel->gaintime);
+ chip->data1 = tsl2563_normalize_adc(adc1, chip->gainlevel->gaintime);
+
+ if (!chip->int_enabled)
+ schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+
+ ret = 0;
+out:
+ return ret;
+}
+
+static inline int tsl2563_calib_to_sysfs(u32 calib)
+{
+ return (int) (((calib * CALIB_BASE_SYSFS) +
+ CALIB_FRAC_HALF) >> CALIB_FRAC_BITS);
+}
+
+static inline u32 tsl2563_calib_from_sysfs(int value)
+{
+ return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS;
+}
+
+/*
+ * Conversions between lux and ADC values.
+ *
+ * The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are
+ * appropriate constants. Different constants are needed for different
+ * kinds of light, determined by the ratio adc1/adc0 (basically the ratio
+ * of the intensities in infrared and visible wavelengths). lux_table below
+ * lists the upper threshold of the adc1/adc0 ratio and the corresponding
+ * constants.
+ */
+
+struct tsl2563_lux_coeff {
+ unsigned long ch_ratio;
+ unsigned long ch0_coeff;
+ unsigned long ch1_coeff;
+};
+
+static const struct tsl2563_lux_coeff lux_table[] = {
+ {
+ .ch_ratio = FRAC10K(1300),
+ .ch0_coeff = FRAC10K(315),
+ .ch1_coeff = FRAC10K(262),
+ }, {
+ .ch_ratio = FRAC10K(2600),
+ .ch0_coeff = FRAC10K(337),
+ .ch1_coeff = FRAC10K(430),
+ }, {
+ .ch_ratio = FRAC10K(3900),
+ .ch0_coeff = FRAC10K(363),
+ .ch1_coeff = FRAC10K(529),
+ }, {
+ .ch_ratio = FRAC10K(5200),
+ .ch0_coeff = FRAC10K(392),
+ .ch1_coeff = FRAC10K(605),
+ }, {
+ .ch_ratio = FRAC10K(6500),
+ .ch0_coeff = FRAC10K(229),
+ .ch1_coeff = FRAC10K(291),
+ }, {
+ .ch_ratio = FRAC10K(8000),
+ .ch0_coeff = FRAC10K(157),
+ .ch1_coeff = FRAC10K(180),
+ }, {
+ .ch_ratio = FRAC10K(13000),
+ .ch0_coeff = FRAC10K(34),
+ .ch1_coeff = FRAC10K(26),
+ }, {
+ .ch_ratio = ULONG_MAX,
+ .ch0_coeff = 0,
+ .ch1_coeff = 0,
+ },
+};
+
+/* Convert normalized, scaled ADC values to lux. */
+static unsigned int tsl2563_adc_to_lux(u32 adc0, u32 adc1)
+{
+ const struct tsl2563_lux_coeff *lp = lux_table;
+ unsigned long ratio, lux, ch0 = adc0, ch1 = adc1;
+
+ ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX;
+
+ while (lp->ch_ratio < ratio)
+ lp++;
+
+ lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff;
+
+ return (unsigned int) (lux >> ADC_FRAC_BITS);
+}
+
+/* Apply calibration coefficient to ADC count. */
+static u32 tsl2563_calib_adc(u32 adc, u32 calib)
+{
+ unsigned long scaled = adc;
+
+ scaled *= calib;
+ scaled >>= CALIB_FRAC_BITS;
+
+ return (u32) scaled;
+}
+
+static int tsl2563_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+
+ if (mask != IIO_CHAN_INFO_CALIBSCALE)
+ return -EINVAL;
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ chip->calib0 = tsl2563_calib_from_sysfs(val);
+ else if (chan->channel2 == IIO_MOD_LIGHT_IR)
+ chip->calib1 = tsl2563_calib_from_sysfs(val);
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int tsl2563_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ int ret = -EINVAL;
+ u32 calib0, calib1;
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+
+ mutex_lock(&chip->lock);
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = tsl2563_get_adc(chip);
+ if (ret)
+ goto error_ret;
+ calib0 = tsl2563_calib_adc(chip->data0, chip->calib0) *
+ chip->cover_comp_gain;
+ calib1 = tsl2563_calib_adc(chip->data1, chip->calib1) *
+ chip->cover_comp_gain;
+ *val = tsl2563_adc_to_lux(calib0, calib1);
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_INTENSITY:
+ ret = tsl2563_get_adc(chip);
+ if (ret)
+ goto error_ret;
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ *val = chip->data0;
+ else
+ *val = chip->data1;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ break;
+ }
+ break;
+
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ *val = tsl2563_calib_to_sysfs(chip->calib0);
+ else
+ *val = tsl2563_calib_to_sysfs(chip->calib1);
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_ret;
+ }
+
+error_ret:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static const struct iio_event_spec tsl2563_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec tsl2563_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ .channel = 0,
+ }, {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2563_events,
+ .num_event_specs = ARRAY_SIZE(tsl2563_events),
+ }, {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ }
+};
+
+static int tsl2563_read_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int *val,
+ int *val2)
+{
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ *val = chip->high_thres;
+ break;
+ case IIO_EV_DIR_FALLING:
+ *val = chip->low_thres;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int tsl2563_write_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int val,
+ int val2)
+{
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+ int ret;
+ u8 address;
+
+ if (dir == IIO_EV_DIR_RISING)
+ address = TSL2563_REG_HIGHLOW;
+ else
+ address = TSL2563_REG_LOWLOW;
+ mutex_lock(&chip->lock);
+ ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,
+ val & 0xFF);
+ if (ret)
+ goto error_ret;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | (address + 1),
+ (val >> 8) & 0xFF);
+ if (dir == IIO_EV_DIR_RISING)
+ chip->high_thres = val;
+ else
+ chip->low_thres = val;
+
+error_ret:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static irqreturn_t tsl2563_event_handler(int irq, void *private)
+{
+ struct iio_dev *dev_info = private;
+ struct tsl2563_chip *chip = iio_priv(dev_info);
+
+ iio_push_event(dev_info,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns(dev_info));
+
+ /* clear the interrupt and push the event */
+ i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);
+ return IRQ_HANDLED;
+}
+
+static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+ int ret = 0;
+
+ mutex_lock(&chip->lock);
+ if (state && !(chip->intr & 0x30)) {
+ chip->intr &= ~0x30;
+ chip->intr |= 0x10;
+ /* ensure the chip is actually on */
+ cancel_delayed_work(&chip->poweroff_work);
+ if (!tsl2563_get_power(chip)) {
+ ret = tsl2563_set_power(chip, 1);
+ if (ret)
+ goto out;
+ ret = tsl2563_configure(chip);
+ if (ret)
+ goto out;
+ }
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_INT,
+ chip->intr);
+ chip->int_enabled = true;
+ }
+
+ if (!state && (chip->intr & 0x30)) {
+ chip->intr &= ~0x30;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_INT,
+ chip->intr);
+ chip->int_enabled = false;
+ /* now the interrupt is not enabled, we can go to sleep */
+ schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+ }
+out:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct tsl2563_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->lock);
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2563_CMD | TSL2563_REG_INT);
+ mutex_unlock(&chip->lock);
+ if (ret < 0)
+ return ret;
+
+ return !!(ret & 0x30);
+}
+
+static const struct iio_info tsl2563_info_no_irq = {
+ .read_raw = &tsl2563_read_raw,
+ .write_raw = &tsl2563_write_raw,
+};
+
+static const struct iio_info tsl2563_info = {
+ .read_raw = &tsl2563_read_raw,
+ .write_raw = &tsl2563_write_raw,
+ .read_event_value = &tsl2563_read_thresh,
+ .write_event_value = &tsl2563_write_thresh,
+ .read_event_config = &tsl2563_read_interrupt_config,
+ .write_event_config = &tsl2563_write_interrupt_config,
+};
+
+static int tsl2563_probe(struct i2c_client *client,
+ const struct i2c_device_id *device_id)
+{
+ struct iio_dev *indio_dev;
+ struct tsl2563_chip *chip;
+ struct tsl2563_platform_data *pdata = client->dev.platform_data;
+ struct device_node *np = client->dev.of_node;
+ int err = 0;
+ u8 id = 0;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, chip);
+ chip->client = client;
+
+ err = tsl2563_detect(chip);
+ if (err) {
+ dev_err(&client->dev, "detect error %d\n", -err);
+ return err;
+ }
+
+ err = tsl2563_read_id(chip, &id);
+ if (err) {
+ dev_err(&client->dev, "read id error %d\n", -err);
+ return err;
+ }
+
+ mutex_init(&chip->lock);
+
+ /* Default values used until userspace says otherwise */
+ chip->low_thres = 0x0;
+ chip->high_thres = 0xffff;
+ chip->gainlevel = tsl2563_gainlevel_table;
+ chip->intr = TSL2563_INT_PERSIST(4);
+ chip->calib0 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
+ chip->calib1 = tsl2563_calib_from_sysfs(CALIB_BASE_SYSFS);
+
+ if (pdata)
+ chip->cover_comp_gain = pdata->cover_comp_gain;
+ else if (np)
+ of_property_read_u32(np, "amstaos,cover-comp-gain",
+ &chip->cover_comp_gain);
+ else
+ chip->cover_comp_gain = 1;
+
+ dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
+ indio_dev->name = client->name;
+ indio_dev->channels = tsl2563_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ if (client->irq)
+ indio_dev->info = &tsl2563_info;
+ else
+ indio_dev->info = &tsl2563_info_no_irq;
+
+ if (client->irq) {
+ err = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL,
+ &tsl2563_event_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "tsl2563_event",
+ indio_dev);
+ if (err) {
+ dev_err(&client->dev, "irq request error %d\n", -err);
+ return err;
+ }
+ }
+
+ err = tsl2563_configure(chip);
+ if (err) {
+ dev_err(&client->dev, "configure error %d\n", -err);
+ return err;
+ }
+
+ INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
+
+ /* The interrupt cannot yet be enabled so this is fine without lock */
+ schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+
+ err = iio_device_register(indio_dev);
+ if (err) {
+ dev_err(&client->dev, "iio registration error %d\n", -err);
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ cancel_delayed_work_sync(&chip->poweroff_work);
+ return err;
+}
+
+static int tsl2563_remove(struct i2c_client *client)
+{
+ struct tsl2563_chip *chip = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = iio_priv_to_dev(chip);
+
+ iio_device_unregister(indio_dev);
+ if (!chip->int_enabled)
+ cancel_delayed_work(&chip->poweroff_work);
+ /* Ensure that interrupts are disabled - then flush any bottom halves */
+ chip->intr &= ~0x30;
+ i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,
+ chip->intr);
+ flush_scheduled_work();
+ tsl2563_set_power(chip, 0);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tsl2563_suspend(struct device *dev)
+{
+ struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = tsl2563_set_power(chip, 0);
+ if (ret)
+ goto out;
+
+ chip->suspended = true;
+
+out:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static int tsl2563_resume(struct device *dev)
+{
+ struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+ int ret;
+
+ mutex_lock(&chip->lock);
+
+ ret = tsl2563_set_power(chip, 1);
+ if (ret)
+ goto out;
+
+ ret = tsl2563_configure(chip);
+ if (ret)
+ goto out;
+
+ chip->suspended = false;
+
+out:
+ mutex_unlock(&chip->lock);
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume);
+#define TSL2563_PM_OPS (&tsl2563_pm_ops)
+#else
+#define TSL2563_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id tsl2563_id[] = {
+ { "tsl2560", 0 },
+ { "tsl2561", 1 },
+ { "tsl2562", 2 },
+ { "tsl2563", 3 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tsl2563_id);
+
+static const struct of_device_id tsl2563_of_match[] = {
+ { .compatible = "amstaos,tsl2560" },
+ { .compatible = "amstaos,tsl2561" },
+ { .compatible = "amstaos,tsl2562" },
+ { .compatible = "amstaos,tsl2563" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, tsl2563_of_match);
+
+static struct i2c_driver tsl2563_i2c_driver = {
+ .driver = {
+ .name = "tsl2563",
+ .of_match_table = tsl2563_of_match,
+ .pm = TSL2563_PM_OPS,
+ },
+ .probe = tsl2563_probe,
+ .remove = tsl2563_remove,
+ .id_table = tsl2563_id,
+};
+module_i2c_driver(tsl2563_i2c_driver);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("tsl2563 light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c
new file mode 100644
index 0000000..4b5d998
--- /dev/null
+++ b/drivers/iio/light/tsl2583.c
@@ -0,0 +1,958 @@
+/*
+ * Device driver for monitoring ambient light intensity (lux)
+ * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
+ *
+ * Copyright (c) 2011, TAOS Corporation.
+ * Copyright (c) 2016-2017 Brian Masney <masneyb@onstation.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/pm_runtime.h>
+
+/* Device Registers and Masks */
+#define TSL2583_CNTRL 0x00
+#define TSL2583_ALS_TIME 0X01
+#define TSL2583_INTERRUPT 0x02
+#define TSL2583_GAIN 0x07
+#define TSL2583_REVID 0x11
+#define TSL2583_CHIPID 0x12
+#define TSL2583_ALS_CHAN0LO 0x14
+#define TSL2583_ALS_CHAN0HI 0x15
+#define TSL2583_ALS_CHAN1LO 0x16
+#define TSL2583_ALS_CHAN1HI 0x17
+#define TSL2583_TMR_LO 0x18
+#define TSL2583_TMR_HI 0x19
+
+/* tsl2583 cmd reg masks */
+#define TSL2583_CMD_REG 0x80
+#define TSL2583_CMD_SPL_FN 0x60
+#define TSL2583_CMD_ALS_INT_CLR 0x01
+
+/* tsl2583 cntrl reg masks */
+#define TSL2583_CNTL_ADC_ENBL 0x02
+#define TSL2583_CNTL_PWR_OFF 0x00
+#define TSL2583_CNTL_PWR_ON 0x01
+
+/* tsl2583 status reg masks */
+#define TSL2583_STA_ADC_VALID 0x01
+#define TSL2583_STA_ADC_INTR 0x10
+
+/* Lux calculation constants */
+#define TSL2583_LUX_CALC_OVER_FLOW 65535
+
+#define TSL2583_INTERRUPT_DISABLED 0x00
+
+#define TSL2583_CHIP_ID 0x90
+#define TSL2583_CHIP_ID_MASK 0xf0
+
+#define TSL2583_POWER_OFF_DELAY_MS 2000
+
+/* Per-device data */
+struct tsl2583_als_info {
+ u16 als_ch0;
+ u16 als_ch1;
+ u16 lux;
+};
+
+struct tsl2583_lux {
+ unsigned int ratio;
+ unsigned int ch0;
+ unsigned int ch1;
+};
+
+static const struct tsl2583_lux tsl2583_default_lux[] = {
+ { 9830, 8520, 15729 },
+ { 12452, 10807, 23344 },
+ { 14746, 6383, 11705 },
+ { 17695, 4063, 6554 },
+ { 0, 0, 0 } /* Termination segment */
+};
+
+#define TSL2583_MAX_LUX_TABLE_ENTRIES 11
+
+struct tsl2583_settings {
+ int als_time;
+ int als_gain;
+ int als_gain_trim;
+ int als_cal_target;
+
+ /*
+ * This structure is intentionally large to accommodate updates via
+ * sysfs. Sized to 11 = max 10 segments + 1 termination segment.
+ * Assumption is that one and only one type of glass used.
+ */
+ struct tsl2583_lux als_device_lux[TSL2583_MAX_LUX_TABLE_ENTRIES];
+};
+
+struct tsl2583_chip {
+ struct mutex als_mutex;
+ struct i2c_client *client;
+ struct tsl2583_als_info als_cur_info;
+ struct tsl2583_settings als_settings;
+ int als_time_scale;
+ int als_saturation;
+};
+
+struct gainadj {
+ s16 ch0;
+ s16 ch1;
+ s16 mean;
+};
+
+/* Index = (0 - 3) Used to validate the gain selection index */
+static const struct gainadj gainadj[] = {
+ { 1, 1, 1 },
+ { 8, 8, 8 },
+ { 16, 16, 16 },
+ { 107, 115, 111 }
+};
+
+/*
+ * Provides initial operational parameter defaults.
+ * These defaults may be changed through the device's sysfs files.
+ */
+static void tsl2583_defaults(struct tsl2583_chip *chip)
+{
+ /*
+ * The integration time must be a multiple of 50ms and within the
+ * range [50, 600] ms.
+ */
+ chip->als_settings.als_time = 100;
+
+ /*
+ * This is an index into the gainadj table. Assume clear glass as the
+ * default.
+ */
+ chip->als_settings.als_gain = 0;
+
+ /* Default gain trim to account for aperture effects */
+ chip->als_settings.als_gain_trim = 1000;
+
+ /* Known external ALS reading used for calibration */
+ chip->als_settings.als_cal_target = 130;
+
+ /* Default lux table. */
+ memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,
+ sizeof(tsl2583_default_lux));
+}
+
+/*
+ * Reads and calculates current lux value.
+ * The raw ch0 and ch1 values of the ambient light sensed in the last
+ * integration cycle are read from the device.
+ * Time scale factor array values are adjusted based on the integration time.
+ * The raw values are multiplied by a scale factor, and device gain is obtained
+ * using gain index. Limit checks are done next, then the ratio of a multiple
+ * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
+ * declared above is then scanned to find the first ratio value that is just
+ * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
+ * the array are then used along with the time scale factor array values, to
+ * calculate the lux.
+ */
+static int tsl2583_get_lux(struct iio_dev *indio_dev)
+{
+ u16 ch0, ch1; /* separated ch0/ch1 data from device */
+ u32 lux; /* raw lux calculated from device data */
+ u64 lux64;
+ u32 ratio;
+ u8 buf[5];
+ struct tsl2583_lux *p;
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int i, ret;
+
+ ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",
+ __func__);
+ goto done;
+ }
+
+ /* is data new & valid */
+ if (!(ret & TSL2583_STA_ADC_INTR)) {
+ dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",
+ __func__);
+ ret = chip->als_cur_info.lux; /* return LAST VALUE */
+ goto done;
+ }
+
+ for (i = 0; i < 4; i++) {
+ int reg = TSL2583_CMD_REG | (TSL2583_ALS_CHAN0LO + i);
+
+ ret = i2c_smbus_read_byte_data(chip->client, reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to read register %x\n",
+ __func__, reg);
+ goto done;
+ }
+ buf[i] = ret;
+ }
+
+ /*
+ * Clear the pending interrupt status bit on the chip to allow the next
+ * integration cycle to start. This has to be done even though this
+ * driver currently does not support interrupts.
+ */
+ ret = i2c_smbus_write_byte(chip->client,
+ (TSL2583_CMD_REG | TSL2583_CMD_SPL_FN |
+ TSL2583_CMD_ALS_INT_CLR));
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",
+ __func__);
+ goto done; /* have no data, so return failure */
+ }
+
+ /* extract ALS/lux data */
+ ch0 = le16_to_cpup((const __le16 *)&buf[0]);
+ ch1 = le16_to_cpup((const __le16 *)&buf[2]);
+
+ chip->als_cur_info.als_ch0 = ch0;
+ chip->als_cur_info.als_ch1 = ch1;
+
+ if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
+ goto return_max;
+
+ if (!ch0) {
+ /*
+ * The sensor appears to be in total darkness so set the
+ * calculated lux to 0 and return early to avoid a division by
+ * zero below when calculating the ratio.
+ */
+ ret = 0;
+ chip->als_cur_info.lux = 0;
+ goto done;
+ }
+
+ /* calculate ratio */
+ ratio = (ch1 << 15) / ch0;
+
+ /* convert to unscaled lux using the pointer to the table */
+ for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;
+ p->ratio != 0 && p->ratio < ratio; p++)
+ ;
+
+ if (p->ratio == 0) {
+ lux = 0;
+ } else {
+ u32 ch0lux, ch1lux;
+
+ ch0lux = ((ch0 * p->ch0) +
+ (gainadj[chip->als_settings.als_gain].ch0 >> 1))
+ / gainadj[chip->als_settings.als_gain].ch0;
+ ch1lux = ((ch1 * p->ch1) +
+ (gainadj[chip->als_settings.als_gain].ch1 >> 1))
+ / gainadj[chip->als_settings.als_gain].ch1;
+
+ /* note: lux is 31 bit max at this point */
+ if (ch1lux > ch0lux) {
+ dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
+ __func__);
+ ret = 0;
+ chip->als_cur_info.lux = 0;
+ goto done;
+ }
+
+ lux = ch0lux - ch1lux;
+ }
+
+ /* adjust for active time scale */
+ if (chip->als_time_scale == 0)
+ lux = 0;
+ else
+ lux = (lux + (chip->als_time_scale >> 1)) /
+ chip->als_time_scale;
+
+ /*
+ * Adjust for active gain scale.
+ * The tsl2583_default_lux tables above have a factor of 8192 built in,
+ * so we need to shift right.
+ * User-specified gain provides a multiplier.
+ * Apply user-specified gain before shifting right to retain precision.
+ * Use 64 bits to avoid overflow on multiplication.
+ * Then go back to 32 bits before division to avoid using div_u64().
+ */
+ lux64 = lux;
+ lux64 = lux64 * chip->als_settings.als_gain_trim;
+ lux64 >>= 13;
+ lux = lux64;
+ lux = (lux + 500) / 1000;
+
+ if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
+return_max:
+ lux = TSL2583_LUX_CALC_OVER_FLOW;
+ }
+
+ /* Update the structure with the latest VALID lux. */
+ chip->als_cur_info.lux = lux;
+ ret = lux;
+
+done:
+ return ret;
+}
+
+/*
+ * Obtain single reading and calculate the als_gain_trim (later used
+ * to derive actual lux).
+ * Return updated gain_trim value.
+ */
+static int tsl2583_als_calibrate(struct iio_dev *indio_dev)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ unsigned int gain_trim_val;
+ int ret;
+ int lux_val;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_CNTRL);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to read from the CNTRL register\n",
+ __func__);
+ return ret;
+ }
+
+ if ((ret & (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON))
+ != (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON)) {
+ dev_err(&chip->client->dev,
+ "%s: Device is not powered on and/or ADC is not enabled\n",
+ __func__);
+ return -EINVAL;
+ } else if ((ret & TSL2583_STA_ADC_VALID) != TSL2583_STA_ADC_VALID) {
+ dev_err(&chip->client->dev,
+ "%s: The two ADC channels have not completed an integration cycle\n",
+ __func__);
+ return -ENODATA;
+ }
+
+ lux_val = tsl2583_get_lux(indio_dev);
+ if (lux_val < 0) {
+ dev_err(&chip->client->dev, "%s: failed to get lux\n",
+ __func__);
+ return lux_val;
+ }
+
+ gain_trim_val = (unsigned int)(((chip->als_settings.als_cal_target)
+ * chip->als_settings.als_gain_trim) / lux_val);
+ if ((gain_trim_val < 250) || (gain_trim_val > 4000)) {
+ dev_err(&chip->client->dev,
+ "%s: trim_val of %d is not within the range [250, 4000]\n",
+ __func__, gain_trim_val);
+ return -ENODATA;
+ }
+
+ chip->als_settings.als_gain_trim = (int)gain_trim_val;
+
+ return 0;
+}
+
+static int tsl2583_set_als_time(struct tsl2583_chip *chip)
+{
+ int als_count, als_time, ret;
+ u8 val;
+
+ /* determine als integration register */
+ als_count = (chip->als_settings.als_time * 100 + 135) / 270;
+ if (!als_count)
+ als_count = 1; /* ensure at least one cycle */
+
+ /* convert back to time (encompasses overrides) */
+ als_time = (als_count * 27 + 5) / 10;
+
+ val = 256 - als_count;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_ALS_TIME,
+ val);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",
+ __func__, val);
+ return ret;
+ }
+
+ /* set chip struct re scaling and saturation */
+ chip->als_saturation = als_count * 922; /* 90% of full scale */
+ chip->als_time_scale = (als_time + 25) / 50;
+
+ return ret;
+}
+
+static int tsl2583_set_als_gain(struct tsl2583_chip *chip)
+{
+ int ret;
+
+ /* Set the gain based on als_settings struct */
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_GAIN,
+ chip->als_settings.als_gain);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to set the gain to %d\n", __func__,
+ chip->als_settings.als_gain);
+
+ return ret;
+}
+
+static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_CNTRL, state);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to set the power state to %d\n", __func__,
+ state);
+
+ return ret;
+}
+
+/*
+ * Turn the device on.
+ * Configuration must be set before calling this function.
+ */
+static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ /* Power on the device; ADC off. */
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_INTERRUPT,
+ TSL2583_INTERRUPT_DISABLED);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to disable interrupts\n", __func__);
+ return ret;
+ }
+
+ ret = tsl2583_set_als_time(chip);
+ if (ret < 0)
+ return ret;
+
+ ret = tsl2583_set_als_gain(chip);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(3000, 3500);
+
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON |
+ TSL2583_CNTL_ADC_ENBL);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+/* Sysfs Interface Functions */
+
+static ssize_t in_illuminance_input_target_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+ ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static ssize_t in_illuminance_input_target_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int value;
+
+ if (kstrtoint(buf, 0, &value) || !value)
+ return -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+ chip->als_settings.als_cal_target = value;
+ mutex_unlock(&chip->als_mutex);
+
+ return len;
+}
+
+static ssize_t in_illuminance_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int value, ret;
+
+ if (kstrtoint(buf, 0, &value) || value != 1)
+ return -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = tsl2583_als_calibrate(indio_dev);
+ if (ret < 0)
+ goto done;
+
+ ret = len;
+done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static ssize_t in_illuminance_lux_table_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int offset = 0;
+
+ for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {
+ offset += sprintf(buf + offset, "%u,%u,%u,",
+ chip->als_settings.als_device_lux[i].ratio,
+ chip->als_settings.als_device_lux[i].ch0,
+ chip->als_settings.als_device_lux[i].ch1);
+ if (chip->als_settings.als_device_lux[i].ratio == 0) {
+ /*
+ * We just printed the first "0" entry.
+ * Now get rid of the extra "," and break.
+ */
+ offset--;
+ break;
+ }
+ }
+
+ offset += sprintf(buf + offset, "\n");
+
+ return offset;
+}
+
+static ssize_t in_illuminance_lux_table_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
+ int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3 + 1];
+ int ret = -EINVAL;
+ unsigned int n;
+
+ mutex_lock(&chip->als_mutex);
+
+ get_options(buf, ARRAY_SIZE(value), value);
+
+ /*
+ * We now have an array of ints starting at value[1], and
+ * enumerated by value[0].
+ * We expect each group of three ints is one table entry,
+ * and the last table entry is all 0.
+ */
+ n = value[0];
+ if ((n % 3) || n < 6 || n > max_ints) {
+ dev_err(dev,
+ "%s: The number of entries in the lux table must be a multiple of 3 and within the range [6, %d]\n",
+ __func__, max_ints);
+ goto done;
+ }
+ if ((value[n - 2] | value[n - 1] | value[n]) != 0) {
+ dev_err(dev, "%s: The last 3 entries in the lux table must be zeros.\n",
+ __func__);
+ goto done;
+ }
+
+ memcpy(chip->als_settings.als_device_lux, &value[1],
+ value[0] * sizeof(value[1]));
+
+ ret = len;
+
+done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static IIO_CONST_ATTR(in_illuminance_calibscale_available, "1 8 16 111");
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+ "0.050 0.100 0.150 0.200 0.250 0.300 0.350 0.400 0.450 0.500 0.550 0.600 0.650");
+static IIO_DEVICE_ATTR_RW(in_illuminance_input_target, 0);
+static IIO_DEVICE_ATTR_WO(in_illuminance_calibrate, 0);
+static IIO_DEVICE_ATTR_RW(in_illuminance_lux_table, 0);
+
+static struct attribute *sysfs_attrs_ctrl[] = {
+ &iio_const_attr_in_illuminance_calibscale_available.dev_attr.attr,
+ &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_input_target.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_calibrate.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_lux_table.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tsl2583_attribute_group = {
+ .attrs = sysfs_attrs_ctrl,
+};
+
+static const struct iio_chan_spec tsl2583_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+};
+
+static int tsl2583_set_pm_runtime_busy(struct tsl2583_chip *chip, bool on)
+{
+ int ret;
+
+ if (on) {
+ ret = pm_runtime_get_sync(&chip->client->dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(&chip->client->dev);
+ } else {
+ pm_runtime_mark_last_busy(&chip->client->dev);
+ ret = pm_runtime_put_autosuspend(&chip->client->dev);
+ }
+
+ return ret;
+}
+
+static int tsl2583_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret, pm_ret;
+
+ ret = tsl2583_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = -EINVAL;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_LIGHT) {
+ ret = tsl2583_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ /*
+ * From page 20 of the TSL2581, TSL2583 data
+ * sheet (TAOS134 − MARCH 2011):
+ *
+ * One of the photodiodes (channel 0) is
+ * sensitive to both visible and infrared light,
+ * while the second photodiode (channel 1) is
+ * sensitive primarily to infrared light.
+ */
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ *val = chip->als_cur_info.als_ch0;
+ else
+ *val = chip->als_cur_info.als_ch1;
+
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_PROCESSED:
+ if (chan->type == IIO_LIGHT) {
+ ret = tsl2583_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ *val = ret;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->als_settings.als_gain_trim;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = gainadj[chip->als_settings.als_gain].mean;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = chip->als_settings.als_time;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+read_done:
+ mutex_unlock(&chip->als_mutex);
+
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Preserve the ret variable if the call to
+ * tsl2583_set_pm_runtime_busy() is successful so the reading
+ * (if applicable) is returned to user space.
+ */
+ pm_ret = tsl2583_set_pm_runtime_busy(chip, false);
+ if (pm_ret < 0)
+ return pm_ret;
+
+ return ret;
+}
+
+static int tsl2583_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ ret = tsl2583_set_pm_runtime_busy(chip, true);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = -EINVAL;
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ chip->als_settings.als_gain_trim = val;
+ ret = 0;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(gainadj); i++) {
+ if (gainadj[i].mean == val) {
+ chip->als_settings.als_gain = i;
+ ret = tsl2583_set_als_gain(chip);
+ break;
+ }
+ }
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
+ val2 <= 650 && !(val2 % 50)) {
+ chip->als_settings.als_time = val2;
+ ret = tsl2583_set_als_time(chip);
+ }
+ break;
+ default:
+ break;
+ }
+
+ mutex_unlock(&chip->als_mutex);
+
+ if (ret < 0)
+ return ret;
+
+ ret = tsl2583_set_pm_runtime_busy(chip, false);
+ if (ret < 0)
+ return ret;
+
+ return ret;
+}
+
+static const struct iio_info tsl2583_info = {
+ .attrs = &tsl2583_attribute_group,
+ .read_raw = tsl2583_read_raw,
+ .write_raw = tsl2583_write_raw,
+};
+
+static int tsl2583_probe(struct i2c_client *clientp,
+ const struct i2c_device_id *idp)
+{
+ int ret;
+ struct tsl2583_chip *chip;
+ struct iio_dev *indio_dev;
+
+ if (!i2c_check_functionality(clientp->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",
+ __func__);
+ return -EOPNOTSUPP;
+ }
+
+ indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+ chip->client = clientp;
+ i2c_set_clientdata(clientp, indio_dev);
+
+ mutex_init(&chip->als_mutex);
+
+ ret = i2c_smbus_read_byte_data(clientp,
+ TSL2583_CMD_REG | TSL2583_CHIPID);
+ if (ret < 0) {
+ dev_err(&clientp->dev,
+ "%s: failed to read the chip ID register\n", __func__);
+ return ret;
+ }
+
+ if ((ret & TSL2583_CHIP_ID_MASK) != TSL2583_CHIP_ID) {
+ dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",
+ __func__, ret);
+ return -EINVAL;
+ }
+
+ indio_dev->info = &tsl2583_info;
+ indio_dev->channels = tsl2583_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
+ indio_dev->dev.parent = &clientp->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = chip->client->name;
+
+ pm_runtime_enable(&clientp->dev);
+ pm_runtime_set_autosuspend_delay(&clientp->dev,
+ TSL2583_POWER_OFF_DELAY_MS);
+ pm_runtime_use_autosuspend(&clientp->dev);
+
+ ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
+ if (ret) {
+ dev_err(&clientp->dev, "%s: iio registration failed\n",
+ __func__);
+ return ret;
+ }
+
+ /* Load up the V2 defaults (these are hard coded defaults for now) */
+ tsl2583_defaults(chip);
+
+ dev_info(&clientp->dev, "Light sensor found.\n");
+
+ return 0;
+}
+
+static int tsl2583_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+ pm_runtime_put_noidle(&client->dev);
+
+ return tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
+}
+
+static int __maybe_unused tsl2583_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
+
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static int __maybe_unused tsl2583_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = tsl2583_chip_init_and_power_on(indio_dev);
+
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static const struct dev_pm_ops tsl2583_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(tsl2583_suspend, tsl2583_resume, NULL)
+};
+
+static const struct i2c_device_id tsl2583_idtable[] = {
+ { "tsl2580", 0 },
+ { "tsl2581", 1 },
+ { "tsl2583", 2 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tsl2583_idtable);
+
+static const struct of_device_id tsl2583_of_match[] = {
+ { .compatible = "amstaos,tsl2580", },
+ { .compatible = "amstaos,tsl2581", },
+ { .compatible = "amstaos,tsl2583", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tsl2583_of_match);
+
+/* Driver definition */
+static struct i2c_driver tsl2583_driver = {
+ .driver = {
+ .name = "tsl2583",
+ .pm = &tsl2583_pm_ops,
+ .of_match_table = tsl2583_of_match,
+ },
+ .id_table = tsl2583_idtable,
+ .probe = tsl2583_probe,
+ .remove = tsl2583_remove,
+};
+module_i2c_driver(tsl2583_driver);
+
+MODULE_AUTHOR("J. August Brenner <jbrenner@taosinc.com>");
+MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
+MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tsl2772.c b/drivers/iio/light/tsl2772.c
new file mode 100644
index 0000000..df5b2a0
--- /dev/null
+++ b/drivers/iio/light/tsl2772.c
@@ -0,0 +1,1802 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Device driver for monitoring ambient light intensity in (lux) and proximity
+ * detection (prox) within the TAOS TSL2571, TSL2671, TMD2671, TSL2771, TMD2771,
+ * TSL2572, TSL2672, TMD2672, TSL2772, and TMD2772 devices.
+ *
+ * Copyright (c) 2012, TAOS Corporation.
+ * Copyright (c) 2017-2018 Brian Masney <masneyb@onstation.org>
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/platform_data/tsl2772.h>
+
+/* Cal defs */
+#define PROX_STAT_CAL 0
+#define PROX_STAT_SAMP 1
+#define MAX_SAMPLES_CAL 200
+
+/* TSL2772 Device ID */
+#define TRITON_ID 0x00
+#define SWORDFISH_ID 0x30
+#define HALIBUT_ID 0x20
+
+/* Lux calculation constants */
+#define TSL2772_LUX_CALC_OVER_FLOW 65535
+
+/*
+ * TAOS Register definitions - Note: depending on device, some of these register
+ * are not used and the register address is benign.
+ */
+
+/* Register offsets */
+#define TSL2772_MAX_CONFIG_REG 16
+
+/* Device Registers and Masks */
+#define TSL2772_CNTRL 0x00
+#define TSL2772_ALS_TIME 0X01
+#define TSL2772_PRX_TIME 0x02
+#define TSL2772_WAIT_TIME 0x03
+#define TSL2772_ALS_MINTHRESHLO 0X04
+#define TSL2772_ALS_MINTHRESHHI 0X05
+#define TSL2772_ALS_MAXTHRESHLO 0X06
+#define TSL2772_ALS_MAXTHRESHHI 0X07
+#define TSL2772_PRX_MINTHRESHLO 0X08
+#define TSL2772_PRX_MINTHRESHHI 0X09
+#define TSL2772_PRX_MAXTHRESHLO 0X0A
+#define TSL2772_PRX_MAXTHRESHHI 0X0B
+#define TSL2772_PERSISTENCE 0x0C
+#define TSL2772_ALS_PRX_CONFIG 0x0D
+#define TSL2772_PRX_COUNT 0x0E
+#define TSL2772_GAIN 0x0F
+#define TSL2772_NOTUSED 0x10
+#define TSL2772_REVID 0x11
+#define TSL2772_CHIPID 0x12
+#define TSL2772_STATUS 0x13
+#define TSL2772_ALS_CHAN0LO 0x14
+#define TSL2772_ALS_CHAN0HI 0x15
+#define TSL2772_ALS_CHAN1LO 0x16
+#define TSL2772_ALS_CHAN1HI 0x17
+#define TSL2772_PRX_LO 0x18
+#define TSL2772_PRX_HI 0x19
+
+/* tsl2772 cmd reg masks */
+#define TSL2772_CMD_REG 0x80
+#define TSL2772_CMD_SPL_FN 0x60
+#define TSL2772_CMD_REPEAT_PROTO 0x00
+#define TSL2772_CMD_AUTOINC_PROTO 0x20
+
+#define TSL2772_CMD_PROX_INT_CLR 0X05
+#define TSL2772_CMD_ALS_INT_CLR 0x06
+#define TSL2772_CMD_PROXALS_INT_CLR 0X07
+
+/* tsl2772 cntrl reg masks */
+#define TSL2772_CNTL_ADC_ENBL 0x02
+#define TSL2772_CNTL_PWR_ON 0x01
+
+/* tsl2772 status reg masks */
+#define TSL2772_STA_ADC_VALID 0x01
+#define TSL2772_STA_PRX_VALID 0x02
+#define TSL2772_STA_ADC_PRX_VALID (TSL2772_STA_ADC_VALID | \
+ TSL2772_STA_PRX_VALID)
+#define TSL2772_STA_ALS_INTR 0x10
+#define TSL2772_STA_PRX_INTR 0x20
+
+/* tsl2772 cntrl reg masks */
+#define TSL2772_CNTL_REG_CLEAR 0x00
+#define TSL2772_CNTL_PROX_INT_ENBL 0X20
+#define TSL2772_CNTL_ALS_INT_ENBL 0X10
+#define TSL2772_CNTL_WAIT_TMR_ENBL 0X08
+#define TSL2772_CNTL_PROX_DET_ENBL 0X04
+#define TSL2772_CNTL_PWRON 0x01
+#define TSL2772_CNTL_ALSPON_ENBL 0x03
+#define TSL2772_CNTL_INTALSPON_ENBL 0x13
+#define TSL2772_CNTL_PROXPON_ENBL 0x0F
+#define TSL2772_CNTL_INTPROXPON_ENBL 0x2F
+
+#define TSL2772_ALS_GAIN_TRIM_MIN 250
+#define TSL2772_ALS_GAIN_TRIM_MAX 4000
+
+/* Device family members */
+enum {
+ tsl2571,
+ tsl2671,
+ tmd2671,
+ tsl2771,
+ tmd2771,
+ tsl2572,
+ tsl2672,
+ tmd2672,
+ tsl2772,
+ tmd2772
+};
+
+enum {
+ TSL2772_CHIP_UNKNOWN = 0,
+ TSL2772_CHIP_WORKING = 1,
+ TSL2772_CHIP_SUSPENDED = 2
+};
+
+/* Per-device data */
+struct tsl2772_als_info {
+ u16 als_ch0;
+ u16 als_ch1;
+ u16 lux;
+};
+
+struct tsl2772_chip_info {
+ int chan_table_elements;
+ struct iio_chan_spec channel_with_events[4];
+ struct iio_chan_spec channel_without_events[4];
+ const struct iio_info *info;
+};
+
+struct tsl2772_chip {
+ kernel_ulong_t id;
+ struct mutex prox_mutex;
+ struct mutex als_mutex;
+ struct i2c_client *client;
+ u16 prox_data;
+ struct tsl2772_als_info als_cur_info;
+ struct tsl2772_settings settings;
+ struct tsl2772_platform_data *pdata;
+ int als_gain_time_scale;
+ int als_saturation;
+ int tsl2772_chip_status;
+ u8 tsl2772_config[TSL2772_MAX_CONFIG_REG];
+ const struct tsl2772_chip_info *chip_info;
+ const struct iio_info *info;
+ s64 event_timestamp;
+ /*
+ * This structure is intentionally large to accommodate
+ * updates via sysfs.
+ * Sized to 9 = max 8 segments + 1 termination segment
+ */
+ struct tsl2772_lux tsl2772_device_lux[TSL2772_MAX_LUX_TABLE_SIZE];
+};
+
+/*
+ * Different devices require different coefficents, and these numbers were
+ * derived from the 'Lux Equation' section of the various device datasheets.
+ * All of these coefficients assume a Glass Attenuation (GA) factor of 1.
+ * The coefficients are multiplied by 1000 to avoid floating point operations.
+ * The two rows in each table correspond to the Lux1 and Lux2 equations from
+ * the datasheets.
+ */
+static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
+ { 53000, 106000 },
+ { 31800, 53000 },
+ { 0, 0 },
+};
+
+static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
+ { 24000, 48000 },
+ { 14400, 24000 },
+ { 0, 0 },
+};
+
+static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
+ { 60000, 112200 },
+ { 37800, 60000 },
+ { 0, 0 },
+};
+
+static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = {
+ { 20000, 35000 },
+ { 12600, 20000 },
+ { 0, 0 },
+};
+
+static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = {
+ [tsl2571] = tsl2x71_lux_table,
+ [tsl2671] = tsl2x71_lux_table,
+ [tmd2671] = tmd2x71_lux_table,
+ [tsl2771] = tsl2x71_lux_table,
+ [tmd2771] = tmd2x71_lux_table,
+ [tsl2572] = tsl2x72_lux_table,
+ [tsl2672] = tsl2x72_lux_table,
+ [tmd2672] = tmd2x72_lux_table,
+ [tsl2772] = tsl2x72_lux_table,
+ [tmd2772] = tmd2x72_lux_table,
+};
+
+static const struct tsl2772_settings tsl2772_default_settings = {
+ .als_time = 255, /* 2.72 / 2.73 ms */
+ .als_gain = 0,
+ .prox_time = 255, /* 2.72 / 2.73 ms */
+ .prox_gain = 0,
+ .wait_time = 255,
+ .als_prox_config = 0,
+ .als_gain_trim = 1000,
+ .als_cal_target = 150,
+ .als_persistence = 1,
+ .als_interrupt_en = false,
+ .als_thresh_low = 200,
+ .als_thresh_high = 256,
+ .prox_persistence = 1,
+ .prox_interrupt_en = false,
+ .prox_thres_low = 0,
+ .prox_thres_high = 512,
+ .prox_max_samples_cal = 30,
+ .prox_pulse_count = 8,
+ .prox_diode = TSL2772_DIODE1,
+ .prox_power = TSL2772_100_mA
+};
+
+static const s16 tsl2772_als_gain[] = {
+ 1,
+ 8,
+ 16,
+ 120
+};
+
+static const s16 tsl2772_prox_gain[] = {
+ 1,
+ 2,
+ 4,
+ 8
+};
+
+static const int tsl2772_int_time_avail[][6] = {
+ [tsl2571] = { 0, 2720, 0, 2720, 0, 696000 },
+ [tsl2671] = { 0, 2720, 0, 2720, 0, 696000 },
+ [tmd2671] = { 0, 2720, 0, 2720, 0, 696000 },
+ [tsl2771] = { 0, 2720, 0, 2720, 0, 696000 },
+ [tmd2771] = { 0, 2720, 0, 2720, 0, 696000 },
+ [tsl2572] = { 0, 2730, 0, 2730, 0, 699000 },
+ [tsl2672] = { 0, 2730, 0, 2730, 0, 699000 },
+ [tmd2672] = { 0, 2730, 0, 2730, 0, 699000 },
+ [tsl2772] = { 0, 2730, 0, 2730, 0, 699000 },
+ [tmd2772] = { 0, 2730, 0, 2730, 0, 699000 },
+};
+
+static int tsl2772_int_calibscale_avail[] = { 1, 8, 16, 120 };
+
+static int tsl2772_prox_calibscale_avail[] = { 1, 2, 4, 8 };
+
+/* Channel variations */
+enum {
+ ALS,
+ PRX,
+ ALSPRX,
+ PRX2,
+ ALSPRX2,
+};
+
+static const u8 device_channel_config[] = {
+ [tsl2571] = ALS,
+ [tsl2671] = PRX,
+ [tmd2671] = PRX,
+ [tsl2771] = ALSPRX,
+ [tmd2771] = ALSPRX,
+ [tsl2572] = ALS,
+ [tsl2672] = PRX2,
+ [tmd2672] = PRX2,
+ [tsl2772] = ALSPRX2,
+ [tmd2772] = ALSPRX2
+};
+
+static int tsl2772_read_status(struct tsl2772_chip *chip)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2772_CMD_REG | TSL2772_STATUS);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to read STATUS register: %d\n", __func__,
+ ret);
+
+ return ret;
+}
+
+static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2772_CMD_REG | TSL2772_CNTRL, data);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to write to control register %x: %d\n",
+ __func__, data, ret);
+ }
+
+ return ret;
+}
+
+static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg,
+ int upper_reg)
+{
+ u8 buf[2];
+ int ret;
+
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2772_CMD_REG | TSL2772_CMD_AUTOINC_PROTO |
+ lower_reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to enable auto increment protocol: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2772_CMD_REG | lower_reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to read from register %x: %d\n", __func__,
+ lower_reg, ret);
+ return ret;
+ }
+ buf[0] = ret;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2772_CMD_REG | upper_reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to read from register %x: %d\n", __func__,
+ upper_reg, ret);
+ return ret;
+ }
+ buf[1] = ret;
+
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2772_CMD_REG | TSL2772_CMD_REPEAT_PROTO |
+ lower_reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to enable repeated byte protocol: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return le16_to_cpup((const __le16 *)&buf[0]);
+}
+
+/**
+ * tsl2772_get_lux() - Reads and calculates current lux value.
+ * @indio_dev: pointer to IIO device
+ *
+ * The raw ch0 and ch1 values of the ambient light sensed in the last
+ * integration cycle are read from the device. The raw values are multiplied
+ * by a device-specific scale factor, and divided by the integration time and
+ * device gain. The code supports multiple lux equations through the lux table
+ * coefficients. A lux gain trim is applied to each lux equation, and then the
+ * maximum lux within the interval 0..65535 is selected.
+ */
+static int tsl2772_get_lux(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ struct tsl2772_lux *p;
+ int max_lux, ret;
+ bool overflow;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->tsl2772_chip_status != TSL2772_CHIP_WORKING) {
+ dev_err(&chip->client->dev, "%s: device is not enabled\n",
+ __func__);
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+
+ ret = tsl2772_read_status(chip);
+ if (ret < 0)
+ goto out_unlock;
+
+ if (!(ret & TSL2772_STA_ADC_VALID)) {
+ dev_err(&chip->client->dev,
+ "%s: data not valid yet\n", __func__);
+ ret = chip->als_cur_info.lux; /* return LAST VALUE */
+ goto out_unlock;
+ }
+
+ ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN0LO,
+ TSL2772_ALS_CHAN0HI);
+ if (ret < 0)
+ goto out_unlock;
+ chip->als_cur_info.als_ch0 = ret;
+
+ ret = tsl2772_read_autoinc_regs(chip, TSL2772_ALS_CHAN1LO,
+ TSL2772_ALS_CHAN1HI);
+ if (ret < 0)
+ goto out_unlock;
+ chip->als_cur_info.als_ch1 = ret;
+
+ if (chip->als_cur_info.als_ch0 >= chip->als_saturation) {
+ max_lux = TSL2772_LUX_CALC_OVER_FLOW;
+ goto update_struct_with_max_lux;
+ }
+
+ if (!chip->als_cur_info.als_ch0) {
+ /* have no data, so return LAST VALUE */
+ ret = chip->als_cur_info.lux;
+ goto out_unlock;
+ }
+
+ max_lux = 0;
+ overflow = false;
+ for (p = (struct tsl2772_lux *)chip->tsl2772_device_lux; p->ch0 != 0;
+ p++) {
+ int lux;
+
+ lux = ((chip->als_cur_info.als_ch0 * p->ch0) -
+ (chip->als_cur_info.als_ch1 * p->ch1)) /
+ chip->als_gain_time_scale;
+
+ /*
+ * The als_gain_trim can have a value within the range 250..4000
+ * and is a multiplier for the lux. A trim of 1000 makes no
+ * changes to the lux, less than 1000 scales it down, and
+ * greater than 1000 scales it up.
+ */
+ lux = (lux * chip->settings.als_gain_trim) / 1000;
+
+ if (lux > TSL2772_LUX_CALC_OVER_FLOW) {
+ overflow = true;
+ continue;
+ }
+
+ max_lux = max(max_lux, lux);
+ }
+
+ if (overflow && max_lux == 0)
+ max_lux = TSL2772_LUX_CALC_OVER_FLOW;
+
+update_struct_with_max_lux:
+ chip->als_cur_info.lux = max_lux;
+ ret = max_lux;
+
+out_unlock:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+/**
+ * tsl2772_get_prox() - Reads proximity data registers and updates
+ * chip->prox_data.
+ *
+ * @indio_dev: pointer to IIO device
+ */
+static int tsl2772_get_prox(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->prox_mutex);
+
+ ret = tsl2772_read_status(chip);
+ if (ret < 0)
+ goto prox_poll_err;
+
+ switch (chip->id) {
+ case tsl2571:
+ case tsl2671:
+ case tmd2671:
+ case tsl2771:
+ case tmd2771:
+ if (!(ret & TSL2772_STA_ADC_VALID)) {
+ ret = -EINVAL;
+ goto prox_poll_err;
+ }
+ break;
+ case tsl2572:
+ case tsl2672:
+ case tmd2672:
+ case tsl2772:
+ case tmd2772:
+ if (!(ret & TSL2772_STA_PRX_VALID)) {
+ ret = -EINVAL;
+ goto prox_poll_err;
+ }
+ break;
+ }
+
+ ret = tsl2772_read_autoinc_regs(chip, TSL2772_PRX_LO, TSL2772_PRX_HI);
+ if (ret < 0)
+ goto prox_poll_err;
+ chip->prox_data = ret;
+
+prox_poll_err:
+ mutex_unlock(&chip->prox_mutex);
+
+ return ret;
+}
+
+/**
+ * tsl2772_defaults() - Populates the device nominal operating parameters
+ * with those provided by a 'platform' data struct or
+ * with prefined defaults.
+ *
+ * @chip: pointer to device structure.
+ */
+static void tsl2772_defaults(struct tsl2772_chip *chip)
+{
+ /* If Operational settings defined elsewhere.. */
+ if (chip->pdata && chip->pdata->platform_default_settings)
+ memcpy(&chip->settings, chip->pdata->platform_default_settings,
+ sizeof(tsl2772_default_settings));
+ else
+ memcpy(&chip->settings, &tsl2772_default_settings,
+ sizeof(tsl2772_default_settings));
+
+ /* Load up the proper lux table. */
+ if (chip->pdata && chip->pdata->platform_lux_table[0].ch0 != 0)
+ memcpy(chip->tsl2772_device_lux,
+ chip->pdata->platform_lux_table,
+ sizeof(chip->pdata->platform_lux_table));
+ else
+ memcpy(chip->tsl2772_device_lux,
+ tsl2772_default_lux_table_group[chip->id],
+ TSL2772_DEFAULT_TABLE_BYTES);
+}
+
+/**
+ * tsl2772_als_calibrate() - Obtain single reading and calculate
+ * the als_gain_trim.
+ *
+ * @indio_dev: pointer to IIO device
+ */
+static int tsl2772_als_calibrate(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int ret, lux_val;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2772_CMD_REG | TSL2772_CNTRL);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to read from the CNTRL register\n",
+ __func__);
+ return ret;
+ }
+
+ if ((ret & (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON))
+ != (TSL2772_CNTL_ADC_ENBL | TSL2772_CNTL_PWR_ON)) {
+ dev_err(&chip->client->dev,
+ "%s: Device is not powered on and/or ADC is not enabled\n",
+ __func__);
+ return -EINVAL;
+ } else if ((ret & TSL2772_STA_ADC_VALID) != TSL2772_STA_ADC_VALID) {
+ dev_err(&chip->client->dev,
+ "%s: The two ADC channels have not completed an integration cycle\n",
+ __func__);
+ return -ENODATA;
+ }
+
+ lux_val = tsl2772_get_lux(indio_dev);
+ if (lux_val < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to get lux\n", __func__);
+ return lux_val;
+ }
+ if (lux_val == 0)
+ return -ERANGE;
+
+ ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /
+ lux_val;
+ if (ret < TSL2772_ALS_GAIN_TRIM_MIN || ret > TSL2772_ALS_GAIN_TRIM_MAX)
+ return -ERANGE;
+
+ chip->settings.als_gain_trim = ret;
+
+ return ret;
+}
+
+static int tsl2772_chip_on(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int ret, i, als_count, als_time_us;
+ u8 *dev_reg, reg_val;
+
+ /* Non calculated parameters */
+ chip->tsl2772_config[TSL2772_ALS_TIME] = chip->settings.als_time;
+ chip->tsl2772_config[TSL2772_PRX_TIME] = chip->settings.prox_time;
+ chip->tsl2772_config[TSL2772_WAIT_TIME] = chip->settings.wait_time;
+ chip->tsl2772_config[TSL2772_ALS_PRX_CONFIG] =
+ chip->settings.als_prox_config;
+
+ chip->tsl2772_config[TSL2772_ALS_MINTHRESHLO] =
+ (chip->settings.als_thresh_low) & 0xFF;
+ chip->tsl2772_config[TSL2772_ALS_MINTHRESHHI] =
+ (chip->settings.als_thresh_low >> 8) & 0xFF;
+ chip->tsl2772_config[TSL2772_ALS_MAXTHRESHLO] =
+ (chip->settings.als_thresh_high) & 0xFF;
+ chip->tsl2772_config[TSL2772_ALS_MAXTHRESHHI] =
+ (chip->settings.als_thresh_high >> 8) & 0xFF;
+ chip->tsl2772_config[TSL2772_PERSISTENCE] =
+ (chip->settings.prox_persistence & 0xFF) << 4 |
+ (chip->settings.als_persistence & 0xFF);
+
+ chip->tsl2772_config[TSL2772_PRX_COUNT] =
+ chip->settings.prox_pulse_count;
+ chip->tsl2772_config[TSL2772_PRX_MINTHRESHLO] =
+ (chip->settings.prox_thres_low) & 0xFF;
+ chip->tsl2772_config[TSL2772_PRX_MINTHRESHHI] =
+ (chip->settings.prox_thres_low >> 8) & 0xFF;
+ chip->tsl2772_config[TSL2772_PRX_MAXTHRESHLO] =
+ (chip->settings.prox_thres_high) & 0xFF;
+ chip->tsl2772_config[TSL2772_PRX_MAXTHRESHHI] =
+ (chip->settings.prox_thres_high >> 8) & 0xFF;
+
+ /* and make sure we're not already on */
+ if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
+ /* if forcing a register update - turn off, then on */
+ dev_info(&chip->client->dev, "device is already enabled\n");
+ return -EINVAL;
+ }
+
+ /* Set the gain based on tsl2772_settings struct */
+ chip->tsl2772_config[TSL2772_GAIN] =
+ (chip->settings.als_gain & 0xFF) |
+ ((chip->settings.prox_gain & 0xFF) << 2) |
+ (chip->settings.prox_diode << 4) |
+ (chip->settings.prox_power << 6);
+
+ /* set chip time scaling and saturation */
+ als_count = 256 - chip->settings.als_time;
+ als_time_us = als_count * tsl2772_int_time_avail[chip->id][3];
+ chip->als_saturation = als_count * 768; /* 75% of full scale */
+ chip->als_gain_time_scale = als_time_us *
+ tsl2772_als_gain[chip->settings.als_gain];
+
+ /*
+ * TSL2772 Specific power-on / adc enable sequence
+ * Power on the device 1st.
+ */
+ ret = tsl2772_write_control_reg(chip, TSL2772_CNTL_PWR_ON);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Use the following shadow copy for our delay before enabling ADC.
+ * Write all the registers.
+ */
+ for (i = 0, dev_reg = chip->tsl2772_config;
+ i < TSL2772_MAX_CONFIG_REG; i++) {
+ int reg = TSL2772_CMD_REG + i;
+
+ ret = i2c_smbus_write_byte_data(chip->client, reg,
+ *dev_reg++);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to write to register %x: %d\n",
+ __func__, reg, ret);
+ return ret;
+ }
+ }
+
+ /* Power-on settling time */
+ usleep_range(3000, 3500);
+
+ reg_val = TSL2772_CNTL_PWR_ON | TSL2772_CNTL_ADC_ENBL |
+ TSL2772_CNTL_PROX_DET_ENBL;
+ if (chip->settings.als_interrupt_en)
+ reg_val |= TSL2772_CNTL_ALS_INT_ENBL;
+ if (chip->settings.prox_interrupt_en)
+ reg_val |= TSL2772_CNTL_PROX_INT_ENBL;
+
+ ret = tsl2772_write_control_reg(chip, reg_val);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
+ TSL2772_CMD_PROXALS_INT_CLR);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to clear interrupt status: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ chip->tsl2772_chip_status = TSL2772_CHIP_WORKING;
+
+ return ret;
+}
+
+static int tsl2772_chip_off(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ /* turn device off */
+ chip->tsl2772_chip_status = TSL2772_CHIP_SUSPENDED;
+ return tsl2772_write_control_reg(chip, 0x00);
+}
+
+/**
+ * tsl2772_invoke_change - power cycle the device to implement the user
+ * parameters
+ * @indio_dev: pointer to IIO device
+ *
+ * Obtain and lock both ALS and PROX resources, determine and save device state
+ * (On/Off), cycle device to implement updated parameter, put device back into
+ * proper state, and unlock resource.
+ */
+static int tsl2772_invoke_change(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int device_status = chip->tsl2772_chip_status;
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+ mutex_lock(&chip->prox_mutex);
+
+ if (device_status == TSL2772_CHIP_WORKING) {
+ ret = tsl2772_chip_off(indio_dev);
+ if (ret < 0)
+ goto unlock;
+ }
+
+ ret = tsl2772_chip_on(indio_dev);
+
+unlock:
+ mutex_unlock(&chip->prox_mutex);
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static int tsl2772_prox_cal(struct iio_dev *indio_dev)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int prox_history[MAX_SAMPLES_CAL + 1];
+ int i, ret, mean, max, sample_sum;
+
+ if (chip->settings.prox_max_samples_cal < 1 ||
+ chip->settings.prox_max_samples_cal > MAX_SAMPLES_CAL)
+ return -EINVAL;
+
+ for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
+ usleep_range(15000, 17500);
+ ret = tsl2772_get_prox(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ prox_history[i] = chip->prox_data;
+ }
+
+ sample_sum = 0;
+ max = INT_MIN;
+ for (i = 0; i < chip->settings.prox_max_samples_cal; i++) {
+ sample_sum += prox_history[i];
+ max = max(max, prox_history[i]);
+ }
+ mean = sample_sum / chip->settings.prox_max_samples_cal;
+
+ chip->settings.prox_thres_high = (max << 1) - mean;
+
+ return tsl2772_invoke_change(indio_dev);
+}
+
+static int tsl2772_read_avail(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ const int **vals, int *type, int *length,
+ long mask)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_INTENSITY) {
+ *length = ARRAY_SIZE(tsl2772_int_calibscale_avail);
+ *vals = tsl2772_int_calibscale_avail;
+ } else {
+ *length = ARRAY_SIZE(tsl2772_prox_calibscale_avail);
+ *vals = tsl2772_prox_calibscale_avail;
+ }
+ *type = IIO_VAL_INT;
+ return IIO_AVAIL_LIST;
+ case IIO_CHAN_INFO_INT_TIME:
+ *length = ARRAY_SIZE(tsl2772_int_time_avail[chip->id]);
+ *vals = tsl2772_int_time_avail[chip->id];
+ *type = IIO_VAL_INT_PLUS_MICRO;
+ return IIO_AVAIL_RANGE;
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t in_illuminance0_target_input_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", chip->settings.als_cal_target);
+}
+
+static ssize_t in_illuminance0_target_input_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ u16 value;
+ int ret;
+
+ if (kstrtou16(buf, 0, &value))
+ return -EINVAL;
+
+ chip->settings.als_cal_target = value;
+ ret = tsl2772_invoke_change(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+static ssize_t in_illuminance0_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ bool value;
+ int ret;
+
+ if (kstrtobool(buf, &value) || !value)
+ return -EINVAL;
+
+ ret = tsl2772_als_calibrate(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = tsl2772_invoke_change(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+static ssize_t in_illuminance0_lux_table_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct tsl2772_chip *chip = iio_priv(dev_to_iio_dev(dev));
+ int i = 0;
+ int offset = 0;
+
+ while (i < TSL2772_MAX_LUX_TABLE_SIZE) {
+ offset += snprintf(buf + offset, PAGE_SIZE, "%u,%u,",
+ chip->tsl2772_device_lux[i].ch0,
+ chip->tsl2772_device_lux[i].ch1);
+ if (chip->tsl2772_device_lux[i].ch0 == 0) {
+ /*
+ * We just printed the first "0" entry.
+ * Now get rid of the extra "," and break.
+ */
+ offset--;
+ break;
+ }
+ i++;
+ }
+
+ offset += snprintf(buf + offset, PAGE_SIZE, "\n");
+ return offset;
+}
+
+static ssize_t in_illuminance0_lux_table_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int value[ARRAY_SIZE(chip->tsl2772_device_lux) * 2 + 1];
+ int n, ret;
+
+ get_options(buf, ARRAY_SIZE(value), value);
+
+ /*
+ * We now have an array of ints starting at value[1], and
+ * enumerated by value[0].
+ * We expect each group of two ints to be one table entry,
+ * and the last table entry is all 0.
+ */
+ n = value[0];
+ if ((n % 2) || n < 4 ||
+ n > ((ARRAY_SIZE(chip->tsl2772_device_lux) - 1) * 2))
+ return -EINVAL;
+
+ if ((value[(n - 1)] | value[n]) != 0)
+ return -EINVAL;
+
+ if (chip->tsl2772_chip_status == TSL2772_CHIP_WORKING) {
+ ret = tsl2772_chip_off(indio_dev);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Zero out the table */
+ memset(chip->tsl2772_device_lux, 0, sizeof(chip->tsl2772_device_lux));
+ memcpy(chip->tsl2772_device_lux, &value[1], (value[0] * 4));
+
+ ret = tsl2772_invoke_change(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+static ssize_t in_proximity0_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ bool value;
+ int ret;
+
+ if (kstrtobool(buf, &value) || !value)
+ return -EINVAL;
+
+ ret = tsl2772_prox_cal(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = tsl2772_invoke_change(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ if (chan->type == IIO_INTENSITY)
+ return chip->settings.als_interrupt_en;
+ else
+ return chip->settings.prox_interrupt_en;
+}
+
+static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int val)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ if (chan->type == IIO_INTENSITY)
+ chip->settings.als_interrupt_en = val ? true : false;
+ else
+ chip->settings.prox_interrupt_en = val ? true : false;
+
+ return tsl2772_invoke_change(indio_dev);
+}
+
+static int tsl2772_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL, count, persistence;
+ u8 time;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (chan->type == IIO_INTENSITY) {
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ chip->settings.als_thresh_high = val;
+ ret = 0;
+ break;
+ case IIO_EV_DIR_FALLING:
+ chip->settings.als_thresh_low = val;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ chip->settings.prox_thres_high = val;
+ ret = 0;
+ break;
+ case IIO_EV_DIR_FALLING:
+ chip->settings.prox_thres_low = val;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ case IIO_EV_INFO_PERIOD:
+ if (chan->type == IIO_INTENSITY)
+ time = chip->settings.als_time;
+ else
+ time = chip->settings.prox_time;
+
+ count = 256 - time;
+ persistence = ((val * 1000000) + val2) /
+ (count * tsl2772_int_time_avail[chip->id][3]);
+
+ if (chan->type == IIO_INTENSITY) {
+ /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
+ if (persistence > 3)
+ persistence = (persistence / 5) + 3;
+
+ chip->settings.als_persistence = persistence;
+ } else {
+ chip->settings.prox_persistence = persistence;
+ }
+
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ if (ret < 0)
+ return ret;
+
+ return tsl2772_invoke_change(indio_dev);
+}
+
+static int tsl2772_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ int filter_delay, persistence;
+ u8 time;
+
+ switch (info) {
+ case IIO_EV_INFO_VALUE:
+ if (chan->type == IIO_INTENSITY) {
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ *val = chip->settings.als_thresh_high;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ *val = chip->settings.als_thresh_low;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ *val = chip->settings.prox_thres_high;
+ return IIO_VAL_INT;
+ case IIO_EV_DIR_FALLING:
+ *val = chip->settings.prox_thres_low;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ }
+ break;
+ case IIO_EV_INFO_PERIOD:
+ if (chan->type == IIO_INTENSITY) {
+ time = chip->settings.als_time;
+ persistence = chip->settings.als_persistence;
+
+ /* ALS filter values are 1, 2, 3, 5, 10, 15, ..., 60 */
+ if (persistence > 3)
+ persistence = (persistence - 3) * 5;
+ } else {
+ time = chip->settings.prox_time;
+ persistence = chip->settings.prox_persistence;
+ }
+
+ filter_delay = persistence * (256 - time) *
+ tsl2772_int_time_avail[chip->id][3];
+
+ *val = filter_delay / 1000000;
+ *val2 = filter_delay % 1000000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int tsl2772_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ tsl2772_get_lux(indio_dev);
+ *val = chip->als_cur_info.lux;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ tsl2772_get_lux(indio_dev);
+ if (chan->channel == 0)
+ *val = chip->als_cur_info.als_ch0;
+ else
+ *val = chip->als_cur_info.als_ch1;
+ return IIO_VAL_INT;
+ case IIO_PROXIMITY:
+ tsl2772_get_prox(indio_dev);
+ *val = chip->prox_data;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT)
+ *val = tsl2772_als_gain[chip->settings.als_gain];
+ else
+ *val = tsl2772_prox_gain[chip->settings.prox_gain];
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ *val = chip->settings.als_gain_trim;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = (256 - chip->settings.als_time) *
+ tsl2772_int_time_avail[chip->id][3];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int tsl2772_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_INTENSITY) {
+ switch (val) {
+ case 1:
+ chip->settings.als_gain = 0;
+ break;
+ case 8:
+ chip->settings.als_gain = 1;
+ break;
+ case 16:
+ chip->settings.als_gain = 2;
+ break;
+ case 120:
+ chip->settings.als_gain = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (val) {
+ case 1:
+ chip->settings.prox_gain = 0;
+ break;
+ case 2:
+ chip->settings.prox_gain = 1;
+ break;
+ case 4:
+ chip->settings.prox_gain = 2;
+ break;
+ case 8:
+ chip->settings.prox_gain = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (val < TSL2772_ALS_GAIN_TRIM_MIN ||
+ val > TSL2772_ALS_GAIN_TRIM_MAX)
+ return -EINVAL;
+
+ chip->settings.als_gain_trim = val;
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0 || val2 < tsl2772_int_time_avail[chip->id][1] ||
+ val2 > tsl2772_int_time_avail[chip->id][5])
+ return -EINVAL;
+
+ chip->settings.als_time = 256 -
+ (val2 / tsl2772_int_time_avail[chip->id][3]);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return tsl2772_invoke_change(indio_dev);
+}
+
+static DEVICE_ATTR_RW(in_illuminance0_target_input);
+
+static DEVICE_ATTR_WO(in_illuminance0_calibrate);
+
+static DEVICE_ATTR_WO(in_proximity0_calibrate);
+
+static DEVICE_ATTR_RW(in_illuminance0_lux_table);
+
+/* Use the default register values to identify the Taos device */
+static int tsl2772_device_id_verif(int id, int target)
+{
+ switch (target) {
+ case tsl2571:
+ case tsl2671:
+ case tsl2771:
+ return (id & 0xf0) == TRITON_ID;
+ case tmd2671:
+ case tmd2771:
+ return (id & 0xf0) == HALIBUT_ID;
+ case tsl2572:
+ case tsl2672:
+ case tmd2672:
+ case tsl2772:
+ case tmd2772:
+ return (id & 0xf0) == SWORDFISH_ID;
+ }
+
+ return -EINVAL;
+}
+
+static irqreturn_t tsl2772_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct tsl2772_chip *chip = iio_priv(indio_dev);
+ s64 timestamp = iio_get_time_ns(indio_dev);
+ int ret;
+
+ ret = tsl2772_read_status(chip);
+ if (ret < 0)
+ return IRQ_HANDLED;
+
+ /* What type of interrupt do we need to process */
+ if (ret & TSL2772_STA_PRX_INTR) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+ }
+
+ if (ret & TSL2772_STA_ALS_INTR) {
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+ }
+
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2772_CMD_REG | TSL2772_CMD_SPL_FN |
+ TSL2772_CMD_PROXALS_INT_CLR);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to clear interrupt status: %d\n",
+ __func__, ret);
+
+ return IRQ_HANDLED;
+}
+
+static struct attribute *tsl2772_ALS_device_attrs[] = {
+ &dev_attr_in_illuminance0_target_input.attr,
+ &dev_attr_in_illuminance0_calibrate.attr,
+ &dev_attr_in_illuminance0_lux_table.attr,
+ NULL
+};
+
+static struct attribute *tsl2772_PRX_device_attrs[] = {
+ &dev_attr_in_proximity0_calibrate.attr,
+ NULL
+};
+
+static struct attribute *tsl2772_ALSPRX_device_attrs[] = {
+ &dev_attr_in_illuminance0_target_input.attr,
+ &dev_attr_in_illuminance0_calibrate.attr,
+ &dev_attr_in_illuminance0_lux_table.attr,
+ NULL
+};
+
+static struct attribute *tsl2772_PRX2_device_attrs[] = {
+ &dev_attr_in_proximity0_calibrate.attr,
+ NULL
+};
+
+static struct attribute *tsl2772_ALSPRX2_device_attrs[] = {
+ &dev_attr_in_illuminance0_target_input.attr,
+ &dev_attr_in_illuminance0_calibrate.attr,
+ &dev_attr_in_illuminance0_lux_table.attr,
+ &dev_attr_in_proximity0_calibrate.attr,
+ NULL
+};
+
+static const struct attribute_group tsl2772_device_attr_group_tbl[] = {
+ [ALS] = {
+ .attrs = tsl2772_ALS_device_attrs,
+ },
+ [PRX] = {
+ .attrs = tsl2772_PRX_device_attrs,
+ },
+ [ALSPRX] = {
+ .attrs = tsl2772_ALSPRX_device_attrs,
+ },
+ [PRX2] = {
+ .attrs = tsl2772_PRX2_device_attrs,
+ },
+ [ALSPRX2] = {
+ .attrs = tsl2772_ALSPRX2_device_attrs,
+ },
+};
+
+#define TSL2772_DEVICE_INFO(type)[type] = \
+ { \
+ .attrs = &tsl2772_device_attr_group_tbl[type], \
+ .read_raw = &tsl2772_read_raw, \
+ .read_avail = &tsl2772_read_avail, \
+ .write_raw = &tsl2772_write_raw, \
+ .read_event_value = &tsl2772_read_event_value, \
+ .write_event_value = &tsl2772_write_event_value, \
+ .read_event_config = &tsl2772_read_interrupt_config, \
+ .write_event_config = &tsl2772_write_interrupt_config, \
+ }
+
+static const struct iio_info tsl2772_device_info[] = {
+ TSL2772_DEVICE_INFO(ALS),
+ TSL2772_DEVICE_INFO(PRX),
+ TSL2772_DEVICE_INFO(ALSPRX),
+ TSL2772_DEVICE_INFO(PRX2),
+ TSL2772_DEVICE_INFO(ALSPRX2),
+};
+
+static const struct iio_event_spec tsl2772_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_PERIOD) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = {
+ [ALS] = {
+ .channel_with_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ },
+ },
+ .channel_without_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ },
+ },
+ .chan_table_elements = 3,
+ .info = &tsl2772_device_info[ALS],
+ },
+ [PRX] = {
+ .channel_with_events = {
+ {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ },
+ },
+ .channel_without_events = {
+ {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ },
+ .chan_table_elements = 1,
+ .info = &tsl2772_device_info[PRX],
+ },
+ [ALSPRX] = {
+ .channel_with_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }, {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ },
+ },
+ .channel_without_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }, {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ },
+ .chan_table_elements = 4,
+ .info = &tsl2772_device_info[ALSPRX],
+ },
+ [PRX2] = {
+ .channel_with_events = {
+ {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ },
+ },
+ .channel_without_events = {
+ {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ },
+ },
+ .chan_table_elements = 1,
+ .info = &tsl2772_device_info[PRX2],
+ },
+ [ALSPRX2] = {
+ .channel_with_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }, {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .event_spec = tsl2772_events,
+ .num_event_specs = ARRAY_SIZE(tsl2772_events),
+ },
+ },
+ .channel_without_events = {
+ {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ }, {
+ .type = IIO_INTENSITY,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }, {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ .info_mask_separate_available =
+ BIT(IIO_CHAN_INFO_CALIBSCALE),
+ },
+ },
+ .chan_table_elements = 4,
+ .info = &tsl2772_device_info[ALSPRX2],
+ },
+};
+
+static int tsl2772_probe(struct i2c_client *clientp,
+ const struct i2c_device_id *id)
+{
+ struct iio_dev *indio_dev;
+ struct tsl2772_chip *chip;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+ chip->client = clientp;
+ i2c_set_clientdata(clientp, indio_dev);
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2772_CMD_REG | TSL2772_CHIPID);
+ if (ret < 0)
+ return ret;
+
+ if (tsl2772_device_id_verif(ret, id->driver_data) <= 0) {
+ dev_info(&chip->client->dev,
+ "%s: i2c device found does not match expected id\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ ret = i2c_smbus_write_byte(clientp, TSL2772_CMD_REG | TSL2772_CNTRL);
+ if (ret < 0) {
+ dev_err(&clientp->dev,
+ "%s: Failed to write to CMD register: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ mutex_init(&chip->als_mutex);
+ mutex_init(&chip->prox_mutex);
+
+ chip->tsl2772_chip_status = TSL2772_CHIP_UNKNOWN;
+ chip->pdata = dev_get_platdata(&clientp->dev);
+ chip->id = id->driver_data;
+ chip->chip_info =
+ &tsl2772_chip_info_tbl[device_channel_config[id->driver_data]];
+
+ indio_dev->info = chip->chip_info->info;
+ indio_dev->dev.parent = &clientp->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = chip->client->name;
+ indio_dev->num_channels = chip->chip_info->chan_table_elements;
+
+ if (clientp->irq) {
+ indio_dev->channels = chip->chip_info->channel_with_events;
+
+ ret = devm_request_threaded_irq(&clientp->dev, clientp->irq,
+ NULL,
+ &tsl2772_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "TSL2772_event",
+ indio_dev);
+ if (ret) {
+ dev_err(&clientp->dev,
+ "%s: irq request failed\n", __func__);
+ return ret;
+ }
+ } else {
+ indio_dev->channels = chip->chip_info->channel_without_events;
+ }
+
+ tsl2772_defaults(chip);
+ ret = tsl2772_chip_on(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ tsl2772_chip_off(indio_dev);
+ dev_err(&clientp->dev,
+ "%s: iio registration failed\n", __func__);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tsl2772_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+ return tsl2772_chip_off(indio_dev);
+}
+
+static int tsl2772_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+
+ return tsl2772_chip_on(indio_dev);
+}
+
+static int tsl2772_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ tsl2772_chip_off(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id tsl2772_idtable[] = {
+ { "tsl2571", tsl2571 },
+ { "tsl2671", tsl2671 },
+ { "tmd2671", tmd2671 },
+ { "tsl2771", tsl2771 },
+ { "tmd2771", tmd2771 },
+ { "tsl2572", tsl2572 },
+ { "tsl2672", tsl2672 },
+ { "tmd2672", tmd2672 },
+ { "tsl2772", tsl2772 },
+ { "tmd2772", tmd2772 },
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, tsl2772_idtable);
+
+static const struct of_device_id tsl2772_of_match[] = {
+ { .compatible = "amstaos,tsl2571" },
+ { .compatible = "amstaos,tsl2671" },
+ { .compatible = "amstaos,tmd2671" },
+ { .compatible = "amstaos,tsl2771" },
+ { .compatible = "amstaos,tmd2771" },
+ { .compatible = "amstaos,tsl2572" },
+ { .compatible = "amstaos,tsl2672" },
+ { .compatible = "amstaos,tmd2672" },
+ { .compatible = "amstaos,tsl2772" },
+ { .compatible = "amstaos,tmd2772" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, tsl2772_of_match);
+
+static const struct dev_pm_ops tsl2772_pm_ops = {
+ .suspend = tsl2772_suspend,
+ .resume = tsl2772_resume,
+};
+
+static struct i2c_driver tsl2772_driver = {
+ .driver = {
+ .name = "tsl2772",
+ .of_match_table = tsl2772_of_match,
+ .pm = &tsl2772_pm_ops,
+ },
+ .id_table = tsl2772_idtable,
+ .probe = tsl2772_probe,
+ .remove = tsl2772_remove,
+};
+
+module_i2c_driver(tsl2772_driver);
+
+MODULE_AUTHOR("J. August Brenner <Jon.Brenner@ams.com>");
+MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
+MODULE_DESCRIPTION("TAOS tsl2772 ambient and proximity light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tsl4531.c b/drivers/iio/light/tsl4531.c
new file mode 100644
index 0000000..06171cb
--- /dev/null
+++ b/drivers/iio/light/tsl4531.c
@@ -0,0 +1,260 @@
+/*
+ * tsl4531.c - Support for TAOS TSL4531 ambient light sensor
+ *
+ * Copyright 2013 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for the TSL4531x family
+ * TSL45311/TSL45313: 7-bit I2C slave address 0x39
+ * TSL45315/TSL45317: 7-bit I2C slave address 0x29
+ *
+ * TODO: single cycle measurement
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define TSL4531_DRV_NAME "tsl4531"
+
+#define TSL4531_COMMAND BIT(7)
+
+#define TSL4531_CONTROL (TSL4531_COMMAND | 0x00)
+#define TSL4531_CONFIG (TSL4531_COMMAND | 0x01)
+#define TSL4531_DATA (TSL4531_COMMAND | 0x04)
+#define TSL4531_ID (TSL4531_COMMAND | 0x0a)
+
+/* operating modes in control register */
+#define TSL4531_MODE_POWERDOWN 0x00
+#define TSL4531_MODE_SINGLE_ADC 0x02
+#define TSL4531_MODE_NORMAL 0x03
+
+/* integration time control in config register */
+#define TSL4531_TCNTRL_400MS 0x00
+#define TSL4531_TCNTRL_200MS 0x01
+#define TSL4531_TCNTRL_100MS 0x02
+
+/* part number in id register */
+#define TSL45311_ID 0x8
+#define TSL45313_ID 0x9
+#define TSL45315_ID 0xa
+#define TSL45317_ID 0xb
+#define TSL4531_ID_SHIFT 4
+
+struct tsl4531_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ int int_time;
+};
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.1 0.2 0.4");
+
+static struct attribute *tsl4531_attributes[] = {
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tsl4531_attribute_group = {
+ .attrs = tsl4531_attributes,
+};
+
+static const struct iio_chan_spec tsl4531_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME)
+ }
+};
+
+static int tsl4531_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tsl4531_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = i2c_smbus_read_word_data(data->client,
+ TSL4531_DATA);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ /* 0.. 1x, 1 .. 2x, 2 .. 4x */
+ *val = 1 << data->int_time;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (data->int_time == 0)
+ *val2 = 400000;
+ else if (data->int_time == 1)
+ *val2 = 200000;
+ else if (data->int_time == 2)
+ *val2 = 100000;
+ else
+ return -EINVAL;
+ *val = 0;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int tsl4531_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tsl4531_data *data = iio_priv(indio_dev);
+ int int_time, ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+ if (val2 == 400000)
+ int_time = 0;
+ else if (val2 == 200000)
+ int_time = 1;
+ else if (val2 == 100000)
+ int_time = 2;
+ else
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ ret = i2c_smbus_write_byte_data(data->client,
+ TSL4531_CONFIG, int_time);
+ if (ret >= 0)
+ data->int_time = int_time;
+ mutex_unlock(&data->lock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info tsl4531_info = {
+ .read_raw = tsl4531_read_raw,
+ .write_raw = tsl4531_write_raw,
+ .attrs = &tsl4531_attribute_group,
+};
+
+static int tsl4531_check_id(struct i2c_client *client)
+{
+ int ret = i2c_smbus_read_byte_data(client, TSL4531_ID);
+ if (ret < 0)
+ return ret;
+
+ switch (ret >> TSL4531_ID_SHIFT) {
+ case TSL45311_ID:
+ case TSL45313_ID:
+ case TSL45315_ID:
+ case TSL45317_ID:
+ return 0;
+ default:
+ return -ENODEV;
+ }
+}
+
+static int tsl4531_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tsl4531_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ ret = tsl4531_check_id(client);
+ if (ret) {
+ dev_err(&client->dev, "no TSL4531 sensor\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, TSL4531_CONTROL,
+ TSL4531_MODE_NORMAL);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, TSL4531_CONFIG,
+ TSL4531_TCNTRL_400MS);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &tsl4531_info;
+ indio_dev->channels = tsl4531_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tsl4531_channels);
+ indio_dev->name = TSL4531_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return iio_device_register(indio_dev);
+}
+
+static int tsl4531_powerdown(struct i2c_client *client)
+{
+ return i2c_smbus_write_byte_data(client, TSL4531_CONTROL,
+ TSL4531_MODE_POWERDOWN);
+}
+
+static int tsl4531_remove(struct i2c_client *client)
+{
+ iio_device_unregister(i2c_get_clientdata(client));
+ tsl4531_powerdown(client);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tsl4531_suspend(struct device *dev)
+{
+ return tsl4531_powerdown(to_i2c_client(dev));
+}
+
+static int tsl4531_resume(struct device *dev)
+{
+ return i2c_smbus_write_byte_data(to_i2c_client(dev), TSL4531_CONTROL,
+ TSL4531_MODE_NORMAL);
+}
+
+static SIMPLE_DEV_PM_OPS(tsl4531_pm_ops, tsl4531_suspend, tsl4531_resume);
+#define TSL4531_PM_OPS (&tsl4531_pm_ops)
+#else
+#define TSL4531_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id tsl4531_id[] = {
+ { "tsl4531", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tsl4531_id);
+
+static struct i2c_driver tsl4531_driver = {
+ .driver = {
+ .name = TSL4531_DRV_NAME,
+ .pm = TSL4531_PM_OPS,
+ },
+ .probe = tsl4531_probe,
+ .remove = tsl4531_remove,
+ .id_table = tsl4531_id,
+};
+
+module_i2c_driver(tsl4531_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("TAOS TSL4531 ambient light sensors driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/us5182d.c b/drivers/iio/light/us5182d.c
new file mode 100644
index 0000000..68e5294
--- /dev/null
+++ b/drivers/iio/light/us5182d.c
@@ -0,0 +1,996 @@
+/*
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * Driver for UPISEMI us5182d Proximity and Ambient Light Sensor.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * To do: Interrupt support.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/iio/sysfs.h>
+#include <linux/mutex.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+
+#define US5182D_REG_CFG0 0x00
+#define US5182D_CFG0_ONESHOT_EN BIT(6)
+#define US5182D_CFG0_SHUTDOWN_EN BIT(7)
+#define US5182D_CFG0_WORD_ENABLE BIT(0)
+#define US5182D_CFG0_PROX BIT(3)
+#define US5182D_CFG0_PX_IRQ BIT(2)
+
+#define US5182D_REG_CFG1 0x01
+#define US5182D_CFG1_ALS_RES16 BIT(4)
+#define US5182D_CFG1_AGAIN_DEFAULT 0x00
+
+#define US5182D_REG_CFG2 0x02
+#define US5182D_CFG2_PX_RES16 BIT(4)
+#define US5182D_CFG2_PXGAIN_DEFAULT BIT(2)
+
+#define US5182D_REG_CFG3 0x03
+#define US5182D_CFG3_LED_CURRENT100 (BIT(4) | BIT(5))
+#define US5182D_CFG3_INT_SOURCE_PX BIT(3)
+
+#define US5182D_REG_CFG4 0x10
+
+/*
+ * Registers for tuning the auto dark current cancelling feature.
+ * DARK_TH(reg 0x27,0x28) - threshold (counts) for auto dark cancelling.
+ * when ALS > DARK_TH --> ALS_Code = ALS - Upper(0x2A) * Dark
+ * when ALS < DARK_TH --> ALS_Code = ALS - Lower(0x29) * Dark
+ */
+#define US5182D_REG_UDARK_TH 0x27
+#define US5182D_REG_DARK_AUTO_EN 0x2b
+#define US5182D_REG_AUTO_LDARK_GAIN 0x29
+#define US5182D_REG_AUTO_HDARK_GAIN 0x2a
+
+/* Thresholds for events: px low (0x08-l, 0x09-h), px high (0x0a-l 0x0b-h) */
+#define US5182D_REG_PXL_TH 0x08
+#define US5182D_REG_PXH_TH 0x0a
+
+#define US5182D_REG_PXL_TH_DEFAULT 1000
+#define US5182D_REG_PXH_TH_DEFAULT 30000
+
+#define US5182D_OPMODE_ALS 0x01
+#define US5182D_OPMODE_PX 0x02
+#define US5182D_OPMODE_SHIFT 4
+
+#define US5182D_REG_DARK_AUTO_EN_DEFAULT 0x80
+#define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT 0x16
+#define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT 0x00
+
+#define US5182D_REG_ADL 0x0c
+#define US5182D_REG_PDL 0x0e
+
+#define US5182D_REG_MODE_STORE 0x21
+#define US5182D_STORE_MODE 0x01
+
+#define US5182D_REG_CHIPID 0xb2
+
+#define US5182D_OPMODE_MASK GENMASK(5, 4)
+#define US5182D_AGAIN_MASK 0x07
+#define US5182D_RESET_CHIP 0x01
+
+#define US5182D_CHIPID 0x26
+#define US5182D_DRV_NAME "us5182d"
+
+#define US5182D_GA_RESOLUTION 1000
+
+#define US5182D_READ_BYTE 1
+#define US5182D_READ_WORD 2
+#define US5182D_OPSTORE_SLEEP_TIME 20 /* ms */
+#define US5182D_SLEEP_MS 3000 /* ms */
+#define US5182D_PXH_TH_DISABLE 0xffff
+#define US5182D_PXL_TH_DISABLE 0x0000
+
+/* Available ranges: [12354, 7065, 3998, 2202, 1285, 498, 256, 138] lux */
+static const int us5182d_scales[] = {188500, 107800, 61000, 33600, 19600, 7600,
+ 3900, 2100};
+
+/*
+ * Experimental thresholds that work with US5182D sensor on evaluation board
+ * roughly between 12-32 lux
+ */
+static u16 us5182d_dark_ths_vals[] = {170, 200, 512, 512, 800, 2000, 4000,
+ 8000};
+
+enum mode {
+ US5182D_ALS_PX,
+ US5182D_ALS_ONLY,
+ US5182D_PX_ONLY
+};
+
+enum pmode {
+ US5182D_CONTINUOUS,
+ US5182D_ONESHOT
+};
+
+struct us5182d_data {
+ struct i2c_client *client;
+ struct mutex lock;
+
+ /* Glass attenuation factor */
+ u32 ga;
+
+ /* Dark gain tuning */
+ u8 lower_dark_gain;
+ u8 upper_dark_gain;
+ u16 *us5182d_dark_ths;
+
+ u16 px_low_th;
+ u16 px_high_th;
+
+ int rising_en;
+ int falling_en;
+
+ u8 opmode;
+ u8 power_mode;
+
+ bool als_enabled;
+ bool px_enabled;
+
+ bool default_continuous;
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available,
+ "0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885");
+
+static struct attribute *us5182d_attrs[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group us5182d_attr_group = {
+ .attrs = us5182d_attrs,
+};
+
+static const struct {
+ u8 reg;
+ u8 val;
+} us5182d_regvals[] = {
+ {US5182D_REG_CFG0, US5182D_CFG0_WORD_ENABLE},
+ {US5182D_REG_CFG1, US5182D_CFG1_ALS_RES16},
+ {US5182D_REG_CFG2, (US5182D_CFG2_PX_RES16 |
+ US5182D_CFG2_PXGAIN_DEFAULT)},
+ {US5182D_REG_CFG3, US5182D_CFG3_LED_CURRENT100 |
+ US5182D_CFG3_INT_SOURCE_PX},
+ {US5182D_REG_CFG4, 0x00},
+};
+
+static const struct iio_event_spec us5182d_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec us5182d_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = us5182d_events,
+ .num_event_specs = ARRAY_SIZE(us5182d_events),
+ }
+};
+
+static int us5182d_oneshot_en(struct us5182d_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * In oneshot mode the chip will power itself down after taking the
+ * required measurement.
+ */
+ ret = ret | US5182D_CFG0_ONESHOT_EN;
+
+ return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+}
+
+static int us5182d_set_opmode(struct us5182d_data *data, u8 mode)
+{
+ int ret;
+
+ if (mode == data->opmode)
+ return 0;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
+ if (ret < 0)
+ return ret;
+
+ /* update mode */
+ ret = ret & ~US5182D_OPMODE_MASK;
+ ret = ret | (mode << US5182D_OPMODE_SHIFT);
+
+ /*
+ * After updating the operating mode, the chip requires that
+ * the operation is stored, by writing 1 in the STORE_MODE
+ * register (auto-clearing).
+ */
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_MODE_STORE,
+ US5182D_STORE_MODE);
+ if (ret < 0)
+ return ret;
+
+ data->opmode = mode;
+ msleep(US5182D_OPSTORE_SLEEP_TIME);
+
+ return 0;
+}
+
+static int us5182d_als_enable(struct us5182d_data *data)
+{
+ int ret;
+ u8 mode;
+
+ if (data->power_mode == US5182D_ONESHOT) {
+ ret = us5182d_set_opmode(data, US5182D_ALS_ONLY);
+ if (ret < 0)
+ return ret;
+ data->px_enabled = false;
+ }
+
+ if (data->als_enabled)
+ return 0;
+
+ mode = data->px_enabled ? US5182D_ALS_PX : US5182D_ALS_ONLY;
+
+ ret = us5182d_set_opmode(data, mode);
+ if (ret < 0)
+ return ret;
+
+ data->als_enabled = true;
+
+ return 0;
+}
+
+static int us5182d_px_enable(struct us5182d_data *data)
+{
+ int ret;
+ u8 mode;
+
+ if (data->power_mode == US5182D_ONESHOT) {
+ ret = us5182d_set_opmode(data, US5182D_PX_ONLY);
+ if (ret < 0)
+ return ret;
+ data->als_enabled = false;
+ }
+
+ if (data->px_enabled)
+ return 0;
+
+ mode = data->als_enabled ? US5182D_ALS_PX : US5182D_PX_ONLY;
+
+ ret = us5182d_set_opmode(data, mode);
+ if (ret < 0)
+ return ret;
+
+ data->px_enabled = true;
+
+ return 0;
+}
+
+static int us5182d_get_als(struct us5182d_data *data)
+{
+ int ret;
+ unsigned long result;
+
+ ret = us5182d_als_enable(data);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_word_data(data->client,
+ US5182D_REG_ADL);
+ if (ret < 0)
+ return ret;
+
+ result = ret * data->ga / US5182D_GA_RESOLUTION;
+ if (result > 0xffff)
+ result = 0xffff;
+
+ return result;
+}
+
+static int us5182d_get_px(struct us5182d_data *data)
+{
+ int ret;
+
+ ret = us5182d_px_enable(data);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_read_word_data(data->client,
+ US5182D_REG_PDL);
+}
+
+static int us5182d_shutdown_en(struct us5182d_data *data, u8 state)
+{
+ int ret;
+
+ if (data->power_mode == US5182D_ONESHOT)
+ return 0;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
+ if (ret < 0)
+ return ret;
+
+ ret = ret & ~US5182D_CFG0_SHUTDOWN_EN;
+ ret = ret | state;
+
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0, ret);
+ if (ret < 0)
+ return ret;
+
+ if (state & US5182D_CFG0_SHUTDOWN_EN) {
+ data->als_enabled = false;
+ data->px_enabled = false;
+ }
+
+ return ret;
+}
+
+
+static int us5182d_set_power_state(struct us5182d_data *data, bool on)
+{
+ int ret;
+
+ if (data->power_mode == US5182D_ONESHOT)
+ return 0;
+
+ if (on) {
+ ret = pm_runtime_get_sync(&data->client->dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(&data->client->dev);
+ } else {
+ pm_runtime_mark_last_busy(&data->client->dev);
+ ret = pm_runtime_put_autosuspend(&data->client->dev);
+ }
+
+ return ret;
+}
+
+static int us5182d_read_value(struct us5182d_data *data,
+ struct iio_chan_spec const *chan)
+{
+ int ret, value;
+
+ mutex_lock(&data->lock);
+
+ if (data->power_mode == US5182D_ONESHOT) {
+ ret = us5182d_oneshot_en(data);
+ if (ret < 0)
+ goto out_err;
+ }
+
+ ret = us5182d_set_power_state(data, true);
+ if (ret < 0)
+ goto out_err;
+
+ if (chan->type == IIO_LIGHT)
+ ret = us5182d_get_als(data);
+ else
+ ret = us5182d_get_px(data);
+ if (ret < 0)
+ goto out_poweroff;
+
+ value = ret;
+
+ ret = us5182d_set_power_state(data, false);
+ if (ret < 0)
+ goto out_err;
+
+ mutex_unlock(&data->lock);
+ return value;
+
+out_poweroff:
+ us5182d_set_power_state(data, false);
+out_err:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int us5182d_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = us5182d_read_value(data, chan);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
+ if (ret < 0)
+ return ret;
+ *val = 0;
+ *val2 = us5182d_scales[ret & US5182D_AGAIN_MASK];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+/**
+ * us5182d_update_dark_th - update Darh_Th registers
+ * @data us5182d_data structure
+ * @index index in us5182d_dark_ths array to use for the updated value
+ *
+ * Function needs to be called with a lock held because it needs two i2c write
+ * byte operations as these registers (0x27 0x28) don't work in word mode
+ * accessing.
+ */
+static int us5182d_update_dark_th(struct us5182d_data *data, int index)
+{
+ __be16 dark_th = cpu_to_be16(data->us5182d_dark_ths[index]);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH,
+ ((u8 *)&dark_th)[0]);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(data->client, US5182D_REG_UDARK_TH + 1,
+ ((u8 *)&dark_th)[1]);
+}
+
+/**
+ * us5182d_apply_scale - update the ALS scale
+ * @data us5182d_data structure
+ * @index index in us5182d_scales array to use for the updated value
+ *
+ * Function needs to be called with a lock held as we're having more than one
+ * i2c operation.
+ */
+static int us5182d_apply_scale(struct us5182d_data *data, int index)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG1);
+ if (ret < 0)
+ return ret;
+
+ ret = ret & (~US5182D_AGAIN_MASK);
+ ret |= index;
+
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG1, ret);
+ if (ret < 0)
+ return ret;
+
+ return us5182d_update_dark_th(data, index);
+}
+
+static int us5182d_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret, i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ if (val != 0)
+ return -EINVAL;
+ for (i = 0; i < ARRAY_SIZE(us5182d_scales); i++)
+ if (val2 == us5182d_scales[i]) {
+ mutex_lock(&data->lock);
+ ret = us5182d_apply_scale(data, i);
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return -EINVAL;
+}
+
+static int us5182d_setup_prox(struct iio_dev *indio_dev,
+ enum iio_event_direction dir, u16 val)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ if (dir == IIO_EV_DIR_FALLING)
+ return i2c_smbus_write_word_data(data->client,
+ US5182D_REG_PXL_TH, val);
+ else if (dir == IIO_EV_DIR_RISING)
+ return i2c_smbus_write_word_data(data->client,
+ US5182D_REG_PXH_TH, val);
+
+ return 0;
+}
+
+static int us5182d_read_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int *val,
+ int *val2)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&data->lock);
+ *val = data->px_high_th;
+ mutex_unlock(&data->lock);
+ break;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&data->lock);
+ *val = data->px_low_th;
+ mutex_unlock(&data->lock);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT;
+}
+
+static int us5182d_write_thresh(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, enum iio_event_info info, int val,
+ int val2)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret;
+
+ if (val < 0 || val > USHRT_MAX || val2 != 0)
+ return -EINVAL;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&data->lock);
+ if (data->rising_en) {
+ ret = us5182d_setup_prox(indio_dev, dir, val);
+ if (ret < 0)
+ goto err;
+ }
+ data->px_high_th = val;
+ mutex_unlock(&data->lock);
+ break;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&data->lock);
+ if (data->falling_en) {
+ ret = us5182d_setup_prox(indio_dev, dir, val);
+ if (ret < 0)
+ goto err;
+ }
+ data->px_low_th = val;
+ mutex_unlock(&data->lock);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+err:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int us5182d_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ mutex_lock(&data->lock);
+ ret = data->rising_en;
+ mutex_unlock(&data->lock);
+ break;
+ case IIO_EV_DIR_FALLING:
+ mutex_lock(&data->lock);
+ ret = data->falling_en;
+ mutex_unlock(&data->lock);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int us5182d_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret;
+ u16 new_th;
+
+ mutex_lock(&data->lock);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ if (data->rising_en == state) {
+ mutex_unlock(&data->lock);
+ return 0;
+ }
+ new_th = US5182D_PXH_TH_DISABLE;
+ if (state) {
+ data->power_mode = US5182D_CONTINUOUS;
+ ret = us5182d_set_power_state(data, true);
+ if (ret < 0)
+ goto err;
+ ret = us5182d_px_enable(data);
+ if (ret < 0)
+ goto err_poweroff;
+ new_th = data->px_high_th;
+ }
+ ret = us5182d_setup_prox(indio_dev, dir, new_th);
+ if (ret < 0)
+ goto err_poweroff;
+ data->rising_en = state;
+ break;
+ case IIO_EV_DIR_FALLING:
+ if (data->falling_en == state) {
+ mutex_unlock(&data->lock);
+ return 0;
+ }
+ new_th = US5182D_PXL_TH_DISABLE;
+ if (state) {
+ data->power_mode = US5182D_CONTINUOUS;
+ ret = us5182d_set_power_state(data, true);
+ if (ret < 0)
+ goto err;
+ ret = us5182d_px_enable(data);
+ if (ret < 0)
+ goto err_poweroff;
+ new_th = data->px_low_th;
+ }
+ ret = us5182d_setup_prox(indio_dev, dir, new_th);
+ if (ret < 0)
+ goto err_poweroff;
+ data->falling_en = state;
+ break;
+ default:
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (!state) {
+ ret = us5182d_set_power_state(data, false);
+ if (ret < 0)
+ goto err;
+ }
+
+ if (!data->falling_en && !data->rising_en && !data->default_continuous)
+ data->power_mode = US5182D_ONESHOT;
+
+ mutex_unlock(&data->lock);
+ return 0;
+
+err_poweroff:
+ if (state)
+ us5182d_set_power_state(data, false);
+err:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static const struct iio_info us5182d_info = {
+ .read_raw = us5182d_read_raw,
+ .write_raw = us5182d_write_raw,
+ .attrs = &us5182d_attr_group,
+ .read_event_value = &us5182d_read_thresh,
+ .write_event_value = &us5182d_write_thresh,
+ .read_event_config = &us5182d_read_event_config,
+ .write_event_config = &us5182d_write_event_config,
+};
+
+static int us5182d_reset(struct iio_dev *indio_dev)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ return i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG3,
+ US5182D_RESET_CHIP);
+}
+
+static int us5182d_init(struct iio_dev *indio_dev)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int i, ret;
+
+ ret = us5182d_reset(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ data->opmode = 0;
+ data->power_mode = US5182D_CONTINUOUS;
+ data->px_low_th = US5182D_REG_PXL_TH_DEFAULT;
+ data->px_high_th = US5182D_REG_PXH_TH_DEFAULT;
+
+ for (i = 0; i < ARRAY_SIZE(us5182d_regvals); i++) {
+ ret = i2c_smbus_write_byte_data(data->client,
+ us5182d_regvals[i].reg,
+ us5182d_regvals[i].val);
+ if (ret < 0)
+ return ret;
+ }
+
+ data->als_enabled = true;
+ data->px_enabled = true;
+
+ if (!data->default_continuous) {
+ ret = us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
+ if (ret < 0)
+ return ret;
+ data->power_mode = US5182D_ONESHOT;
+ }
+
+ return ret;
+}
+
+static void us5182d_get_platform_data(struct iio_dev *indio_dev)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ if (device_property_read_u32(&data->client->dev, "upisemi,glass-coef",
+ &data->ga))
+ data->ga = US5182D_GA_RESOLUTION;
+ if (device_property_read_u16_array(&data->client->dev,
+ "upisemi,dark-ths",
+ data->us5182d_dark_ths,
+ ARRAY_SIZE(us5182d_dark_ths_vals)))
+ data->us5182d_dark_ths = us5182d_dark_ths_vals;
+ if (device_property_read_u8(&data->client->dev,
+ "upisemi,upper-dark-gain",
+ &data->upper_dark_gain))
+ data->upper_dark_gain = US5182D_REG_AUTO_HDARK_GAIN_DEFAULT;
+ if (device_property_read_u8(&data->client->dev,
+ "upisemi,lower-dark-gain",
+ &data->lower_dark_gain))
+ data->lower_dark_gain = US5182D_REG_AUTO_LDARK_GAIN_DEFAULT;
+ data->default_continuous = device_property_read_bool(&data->client->dev,
+ "upisemi,continuous");
+}
+
+static int us5182d_dark_gain_config(struct iio_dev *indio_dev)
+{
+ struct us5182d_data *data = iio_priv(indio_dev);
+ int ret;
+
+ ret = us5182d_update_dark_th(data, US5182D_CFG1_AGAIN_DEFAULT);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ US5182D_REG_AUTO_LDARK_GAIN,
+ data->lower_dark_gain);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ US5182D_REG_AUTO_HDARK_GAIN,
+ data->upper_dark_gain);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(data->client, US5182D_REG_DARK_AUTO_EN,
+ US5182D_REG_DARK_AUTO_EN_DEFAULT);
+}
+
+static irqreturn_t us5182d_irq_thread_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct us5182d_data *data = iio_priv(indio_dev);
+ enum iio_event_direction dir;
+ int ret;
+ u64 ev;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CFG0);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "i2c transfer error in irq\n");
+ return IRQ_HANDLED;
+ }
+
+ dir = ret & US5182D_CFG0_PROX ? IIO_EV_DIR_RISING : IIO_EV_DIR_FALLING;
+ ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, IIO_EV_TYPE_THRESH, dir);
+
+ iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
+
+ ret = i2c_smbus_write_byte_data(data->client, US5182D_REG_CFG0,
+ ret & ~US5182D_CFG0_PX_IRQ);
+ if (ret < 0)
+ dev_err(&data->client->dev, "i2c transfer error in irq\n");
+
+ return IRQ_HANDLED;
+}
+
+static int us5182d_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct us5182d_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &us5182d_info;
+ indio_dev->name = US5182D_DRV_NAME;
+ indio_dev->channels = us5182d_channels;
+ indio_dev->num_channels = ARRAY_SIZE(us5182d_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = i2c_smbus_read_byte_data(data->client, US5182D_REG_CHIPID);
+ if (ret != US5182D_CHIPID) {
+ dev_err(&data->client->dev,
+ "Failed to detect US5182 light chip\n");
+ return (ret < 0) ? ret : -ENODEV;
+ }
+
+ if (client->irq > 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ us5182d_irq_thread_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "us5182d-irq", indio_dev);
+ if (ret < 0)
+ return ret;
+ } else
+ dev_warn(&client->dev, "no valid irq found\n");
+
+ us5182d_get_platform_data(indio_dev);
+ ret = us5182d_init(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = us5182d_dark_gain_config(indio_dev);
+ if (ret < 0)
+ goto out_err;
+
+ if (data->default_continuous) {
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto out_err;
+ }
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev,
+ US5182D_SLEEP_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
+ return ret;
+
+}
+
+static int us5182d_remove(struct i2c_client *client)
+{
+ struct us5182d_data *data = iio_priv(i2c_get_clientdata(client));
+
+ iio_device_unregister(i2c_get_clientdata(client));
+
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
+}
+
+#if defined(CONFIG_PM_SLEEP) || defined(CONFIG_PM)
+static int us5182d_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ if (data->power_mode == US5182D_CONTINUOUS)
+ return us5182d_shutdown_en(data, US5182D_CFG0_SHUTDOWN_EN);
+
+ return 0;
+}
+
+static int us5182d_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct us5182d_data *data = iio_priv(indio_dev);
+
+ if (data->power_mode == US5182D_CONTINUOUS)
+ return us5182d_shutdown_en(data,
+ ~US5182D_CFG0_SHUTDOWN_EN & 0xff);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops us5182d_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(us5182d_suspend, us5182d_resume)
+ SET_RUNTIME_PM_OPS(us5182d_suspend, us5182d_resume, NULL)
+};
+
+static const struct acpi_device_id us5182d_acpi_match[] = {
+ { "USD5182", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match);
+
+static const struct i2c_device_id us5182d_id[] = {
+ {"usd5182", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, us5182d_id);
+
+static const struct of_device_id us5182d_of_match[] = {
+ { .compatible = "upisemi,usd5182" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, us5182d_of_match);
+
+static struct i2c_driver us5182d_driver = {
+ .driver = {
+ .name = US5182D_DRV_NAME,
+ .pm = &us5182d_pm_ops,
+ .of_match_table = us5182d_of_match,
+ .acpi_match_table = ACPI_PTR(us5182d_acpi_match),
+ },
+ .probe = us5182d_probe,
+ .remove = us5182d_remove,
+ .id_table = us5182d_id,
+
+};
+module_i2c_driver(us5182d_driver);
+
+MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
+MODULE_DESCRIPTION("Driver for us5182d Proximity and Light Sensor");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
new file mode 100644
index 0000000..04fd0d4
--- /dev/null
+++ b/drivers/iio/light/vcnl4000.c
@@ -0,0 +1,378 @@
+/*
+ * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4200 combined ambient
+ * light and proximity sensor
+ *
+ * Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for:
+ * VCNL4000/10/20 (7-bit I2C slave address 0x13)
+ * VCNL4200 (7-bit I2C slave address 0x51)
+ *
+ * TODO:
+ * allow to adjust IR current
+ * proximity threshold and event handling
+ * periodic ALS/proximity measurement (VCNL4010/20)
+ * interrupts (VCNL4010/20, VCNL4200)
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define VCNL4000_DRV_NAME "vcnl4000"
+#define VCNL4000_PROD_ID 0x01
+#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
+#define VCNL4200_PROD_ID 0x58
+
+#define VCNL4000_COMMAND 0x80 /* Command register */
+#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
+#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
+#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
+#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
+#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
+#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
+#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
+#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
+#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
+
+#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
+#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
+#define VCNL4200_PS_DATA 0x08 /* Proximity data */
+#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
+#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
+
+/* Bit masks for COMMAND register */
+#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
+#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
+#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
+#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
+
+enum vcnl4000_device_ids {
+ VCNL4000,
+ VCNL4010,
+ VCNL4200,
+};
+
+struct vcnl4200_channel {
+ u8 reg;
+ ktime_t last_measurement;
+ ktime_t sampling_rate;
+ struct mutex lock;
+};
+
+struct vcnl4000_data {
+ struct i2c_client *client;
+ enum vcnl4000_device_ids id;
+ int rev;
+ int al_scale;
+ const struct vcnl4000_chip_spec *chip_spec;
+ struct mutex vcnl4000_lock;
+ struct vcnl4200_channel vcnl4200_al;
+ struct vcnl4200_channel vcnl4200_ps;
+};
+
+struct vcnl4000_chip_spec {
+ const char *prod;
+ int (*init)(struct vcnl4000_data *data);
+ int (*measure_light)(struct vcnl4000_data *data, int *val);
+ int (*measure_proximity)(struct vcnl4000_data *data, int *val);
+};
+
+static const struct i2c_device_id vcnl4000_id[] = {
+ { "vcnl4000", VCNL4000 },
+ { "vcnl4010", VCNL4010 },
+ { "vcnl4020", VCNL4010 },
+ { "vcnl4200", VCNL4200 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
+
+static int vcnl4000_init(struct vcnl4000_data *data)
+{
+ int ret, prod_id;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
+ if (ret < 0)
+ return ret;
+
+ prod_id = ret >> 4;
+ switch (prod_id) {
+ case VCNL4000_PROD_ID:
+ if (data->id != VCNL4000)
+ dev_warn(&data->client->dev,
+ "wrong device id, use vcnl4000");
+ break;
+ case VCNL4010_PROD_ID:
+ if (data->id != VCNL4010)
+ dev_warn(&data->client->dev,
+ "wrong device id, use vcnl4010/4020");
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ data->rev = ret & 0xf;
+ data->al_scale = 250000;
+ mutex_init(&data->vcnl4000_lock);
+
+ return 0;
+};
+
+static int vcnl4200_init(struct vcnl4000_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
+ if (ret < 0)
+ return ret;
+
+ if ((ret & 0xff) != VCNL4200_PROD_ID)
+ return -ENODEV;
+
+ data->rev = (ret >> 8) & 0xf;
+
+ /* Set defaults and enable both channels */
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4200_AL_CONF, 0x00);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4200_PS_CONF1, 0x00);
+ if (ret < 0)
+ return ret;
+
+ data->al_scale = 24000;
+ data->vcnl4200_al.reg = VCNL4200_AL_DATA;
+ data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
+ /* Integration time is 50ms, but the experiments show 54ms in total. */
+ data->vcnl4200_al.sampling_rate = ktime_set(0, 54000 * 1000);
+ data->vcnl4200_ps.sampling_rate = ktime_set(0, 4200 * 1000);
+ data->vcnl4200_al.last_measurement = ktime_set(0, 0);
+ data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
+ mutex_init(&data->vcnl4200_al.lock);
+ mutex_init(&data->vcnl4200_ps.lock);
+
+ return 0;
+};
+
+static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
+ u8 rdy_mask, u8 data_reg, int *val)
+{
+ int tries = 20;
+ __be16 buf;
+ int ret;
+
+ mutex_lock(&data->vcnl4000_lock);
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
+ req_mask);
+ if (ret < 0)
+ goto fail;
+
+ /* wait for data to become ready */
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
+ if (ret < 0)
+ goto fail;
+ if (ret & rdy_mask)
+ break;
+ msleep(20); /* measurement takes up to 100 ms */
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev,
+ "vcnl4000_measure() failed, data not ready\n");
+ ret = -EIO;
+ goto fail;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data(data->client,
+ data_reg, sizeof(buf), (u8 *) &buf);
+ if (ret < 0)
+ goto fail;
+
+ mutex_unlock(&data->vcnl4000_lock);
+ *val = be16_to_cpu(buf);
+
+ return 0;
+
+fail:
+ mutex_unlock(&data->vcnl4000_lock);
+ return ret;
+}
+
+static int vcnl4200_measure(struct vcnl4000_data *data,
+ struct vcnl4200_channel *chan, int *val)
+{
+ int ret;
+ s64 delta;
+ ktime_t next_measurement;
+
+ mutex_lock(&chan->lock);
+
+ next_measurement = ktime_add(chan->last_measurement,
+ chan->sampling_rate);
+ delta = ktime_us_delta(next_measurement, ktime_get());
+ if (delta > 0)
+ usleep_range(delta, delta + 500);
+ chan->last_measurement = ktime_get();
+
+ mutex_unlock(&chan->lock);
+
+ ret = i2c_smbus_read_word_data(data->client, chan->reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return 0;
+}
+
+static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4000_measure(data,
+ VCNL4000_AL_OD, VCNL4000_AL_RDY,
+ VCNL4000_AL_RESULT_HI, val);
+}
+
+static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4200_measure(data, &data->vcnl4200_al, val);
+}
+
+static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4000_measure(data,
+ VCNL4000_PS_OD, VCNL4000_PS_RDY,
+ VCNL4000_PS_RESULT_HI, val);
+}
+
+static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val)
+{
+ return vcnl4200_measure(data, &data->vcnl4200_ps, val);
+}
+
+static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
+ [VCNL4000] = {
+ .prod = "VCNL4000",
+ .init = vcnl4000_init,
+ .measure_light = vcnl4000_measure_light,
+ .measure_proximity = vcnl4000_measure_proximity,
+ },
+ [VCNL4010] = {
+ .prod = "VCNL4010/4020",
+ .init = vcnl4000_init,
+ .measure_light = vcnl4000_measure_light,
+ .measure_proximity = vcnl4000_measure_proximity,
+ },
+ [VCNL4200] = {
+ .prod = "VCNL4200",
+ .init = vcnl4200_init,
+ .measure_light = vcnl4200_measure_light,
+ .measure_proximity = vcnl4200_measure_proximity,
+ },
+};
+
+static const struct iio_chan_spec vcnl4000_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }
+};
+
+static int vcnl4000_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = data->chip_spec->measure_light(data, val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_PROXIMITY:
+ ret = data->chip_spec->measure_proximity(data, val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ *val = 0;
+ *val2 = data->al_scale;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info vcnl4000_info = {
+ .read_raw = vcnl4000_read_raw,
+};
+
+static int vcnl4000_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct vcnl4000_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->id = id->driver_data;
+ data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];
+
+ ret = data->chip_spec->init(data);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
+ data->chip_spec->prod, data->rev);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &vcnl4000_info;
+ indio_dev->channels = vcnl4000_channels;
+ indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
+ indio_dev->name = VCNL4000_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static struct i2c_driver vcnl4000_driver = {
+ .driver = {
+ .name = VCNL4000_DRV_NAME,
+ },
+ .probe = vcnl4000_probe,
+ .id_table = vcnl4000_id,
+};
+
+module_i2c_driver(vcnl4000_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/veml6070.c b/drivers/iio/light/veml6070.c
new file mode 100644
index 0000000..f4bf3c5
--- /dev/null
+++ b/drivers/iio/light/veml6070.c
@@ -0,0 +1,217 @@
+/*
+ * veml6070.c - Support for Vishay VEML6070 UV A light sensor
+ *
+ * Copyright 2016 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for VEML6070 (7-bit I2C slave addresses 0x38 and 0x39)
+ *
+ * TODO: integration time, ACK signal
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define VEML6070_DRV_NAME "veml6070"
+
+#define VEML6070_ADDR_CONFIG_DATA_MSB 0x38 /* read: MSB data, write: config */
+#define VEML6070_ADDR_DATA_LSB 0x39 /* LSB data */
+
+#define VEML6070_COMMAND_ACK BIT(5) /* raise interrupt when over threshold */
+#define VEML6070_COMMAND_IT GENMASK(3, 2) /* bit mask integration time */
+#define VEML6070_COMMAND_RSRVD BIT(1) /* reserved, set to 1 */
+#define VEML6070_COMMAND_SD BIT(0) /* shutdown mode when set */
+
+#define VEML6070_IT_10 0x04 /* integration time 1x */
+
+struct veml6070_data {
+ struct i2c_client *client1;
+ struct i2c_client *client2;
+ u8 config;
+ struct mutex lock;
+};
+
+static int veml6070_read(struct veml6070_data *data)
+{
+ int ret;
+ u8 msb, lsb;
+
+ mutex_lock(&data->lock);
+
+ /* disable shutdown */
+ ret = i2c_smbus_write_byte(data->client1,
+ data->config & ~VEML6070_COMMAND_SD);
+ if (ret < 0)
+ goto out;
+
+ msleep(125 + 10); /* measurement takes up to 125 ms for IT 1x */
+
+ ret = i2c_smbus_read_byte(data->client2); /* read MSB, address 0x39 */
+ if (ret < 0)
+ goto out;
+ msb = ret;
+
+ ret = i2c_smbus_read_byte(data->client1); /* read LSB, address 0x38 */
+ if (ret < 0)
+ goto out;
+ lsb = ret;
+
+ /* shutdown again */
+ ret = i2c_smbus_write_byte(data->client1, data->config);
+ if (ret < 0)
+ goto out;
+
+ ret = (msb << 8) | lsb;
+
+out:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static const struct iio_chan_spec veml6070_channels[] = {
+ {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_UV,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_UVINDEX,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ }
+};
+
+static int veml6070_to_uv_index(unsigned val)
+{
+ /*
+ * conversion of raw UV intensity values to UV index depends on
+ * integration time (IT) and value of the resistor connected to
+ * the RSET pin (default: 270 KOhm)
+ */
+ unsigned uvi[11] = {
+ 187, 373, 560, /* low */
+ 746, 933, 1120, /* moderate */
+ 1308, 1494, /* high */
+ 1681, 1868, 2054}; /* very high */
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(uvi); i++)
+ if (val <= uvi[i])
+ return i;
+
+ return 11; /* extreme */
+}
+
+static int veml6070_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct veml6070_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = veml6070_read(data);
+ if (ret < 0)
+ return ret;
+ if (mask == IIO_CHAN_INFO_PROCESSED)
+ *val = veml6070_to_uv_index(ret);
+ else
+ *val = ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info veml6070_info = {
+ .read_raw = veml6070_read_raw,
+};
+
+static int veml6070_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct veml6070_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client1 = client;
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &veml6070_info;
+ indio_dev->channels = veml6070_channels;
+ indio_dev->num_channels = ARRAY_SIZE(veml6070_channels);
+ indio_dev->name = VEML6070_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ data->client2 = i2c_new_dummy(client->adapter, VEML6070_ADDR_DATA_LSB);
+ if (!data->client2) {
+ dev_err(&client->dev, "i2c device for second chip address failed\n");
+ return -ENODEV;
+ }
+
+ data->config = VEML6070_IT_10 | VEML6070_COMMAND_RSRVD |
+ VEML6070_COMMAND_SD;
+ ret = i2c_smbus_write_byte(data->client1, data->config);
+ if (ret < 0)
+ goto fail;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto fail;
+
+ return ret;
+
+fail:
+ i2c_unregister_device(data->client2);
+ return ret;
+}
+
+static int veml6070_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct veml6070_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ i2c_unregister_device(data->client2);
+
+ return 0;
+}
+
+static const struct i2c_device_id veml6070_id[] = {
+ { "veml6070", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, veml6070_id);
+
+static struct i2c_driver veml6070_driver = {
+ .driver = {
+ .name = VEML6070_DRV_NAME,
+ },
+ .probe = veml6070_probe,
+ .remove = veml6070_remove,
+ .id_table = veml6070_id,
+};
+
+module_i2c_driver(veml6070_driver);
+
+MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Vishay VEML6070 UV A light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/vl6180.c b/drivers/iio/light/vl6180.c
new file mode 100644
index 0000000..192c77e
--- /dev/null
+++ b/drivers/iio/light/vl6180.c
@@ -0,0 +1,554 @@
+/*
+ * vl6180.c - Support for STMicroelectronics VL6180 ALS, range and proximity
+ * sensor
+ *
+ * Copyright 2017 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
+ * Copyright 2017 Manivannan Sadhasivam <manivannanece23@gmail.com>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for VL6180 (7-bit I2C slave address 0x29)
+ *
+ * Range: 0 to 100mm
+ * ALS: < 1 Lux up to 100 kLux
+ * IR: 850nm
+ *
+ * TODO: irq, threshold events, continuous mode, hardware buffer
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/util_macros.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define VL6180_DRV_NAME "vl6180"
+
+/* Device identification register and value */
+#define VL6180_MODEL_ID 0x000
+#define VL6180_MODEL_ID_VAL 0xb4
+
+/* Configuration registers */
+#define VL6180_INTR_CONFIG 0x014
+#define VL6180_INTR_CLEAR 0x015
+#define VL6180_OUT_OF_RESET 0x016
+#define VL6180_HOLD 0x017
+#define VL6180_RANGE_START 0x018
+#define VL6180_ALS_START 0x038
+#define VL6180_ALS_GAIN 0x03f
+#define VL6180_ALS_IT 0x040
+
+/* Status registers */
+#define VL6180_RANGE_STATUS 0x04d
+#define VL6180_ALS_STATUS 0x04e
+#define VL6180_INTR_STATUS 0x04f
+
+/* Result value registers */
+#define VL6180_ALS_VALUE 0x050
+#define VL6180_RANGE_VALUE 0x062
+#define VL6180_RANGE_RATE 0x066
+
+/* bits of the RANGE_START and ALS_START register */
+#define VL6180_MODE_CONT BIT(1) /* continuous mode */
+#define VL6180_STARTSTOP BIT(0) /* start measurement, auto-reset */
+
+/* bits of the INTR_STATUS and INTR_CONFIG register */
+#define VL6180_ALS_READY BIT(5)
+#define VL6180_RANGE_READY BIT(2)
+
+/* bits of the INTR_CLEAR register */
+#define VL6180_CLEAR_ERROR BIT(2)
+#define VL6180_CLEAR_ALS BIT(1)
+#define VL6180_CLEAR_RANGE BIT(0)
+
+/* bits of the HOLD register */
+#define VL6180_HOLD_ON BIT(0)
+
+/* default value for the ALS_IT register */
+#define VL6180_ALS_IT_100 0x63 /* 100 ms */
+
+/* values for the ALS_GAIN register */
+#define VL6180_ALS_GAIN_1 0x46
+#define VL6180_ALS_GAIN_1_25 0x45
+#define VL6180_ALS_GAIN_1_67 0x44
+#define VL6180_ALS_GAIN_2_5 0x43
+#define VL6180_ALS_GAIN_5 0x42
+#define VL6180_ALS_GAIN_10 0x41
+#define VL6180_ALS_GAIN_20 0x40
+#define VL6180_ALS_GAIN_40 0x47
+
+struct vl6180_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ unsigned int als_gain_milli;
+ unsigned int als_it_ms;
+};
+
+enum { VL6180_ALS, VL6180_RANGE, VL6180_PROX };
+
+/**
+ * struct vl6180_chan_regs - Registers for accessing channels
+ * @drdy_mask: Data ready bit in status register
+ * @start_reg: Conversion start register
+ * @value_reg: Result value register
+ * @word: Register word length
+ */
+struct vl6180_chan_regs {
+ u8 drdy_mask;
+ u16 start_reg, value_reg;
+ bool word;
+};
+
+static const struct vl6180_chan_regs vl6180_chan_regs_table[] = {
+ [VL6180_ALS] = {
+ .drdy_mask = VL6180_ALS_READY,
+ .start_reg = VL6180_ALS_START,
+ .value_reg = VL6180_ALS_VALUE,
+ .word = true,
+ },
+ [VL6180_RANGE] = {
+ .drdy_mask = VL6180_RANGE_READY,
+ .start_reg = VL6180_RANGE_START,
+ .value_reg = VL6180_RANGE_VALUE,
+ .word = false,
+ },
+ [VL6180_PROX] = {
+ .drdy_mask = VL6180_RANGE_READY,
+ .start_reg = VL6180_RANGE_START,
+ .value_reg = VL6180_RANGE_RATE,
+ .word = true,
+ },
+};
+
+static int vl6180_read(struct i2c_client *client, u16 cmd, void *databuf,
+ u8 len)
+{
+ __be16 cmdbuf = cpu_to_be16(cmd);
+ struct i2c_msg msgs[2] = {
+ { .addr = client->addr, .len = sizeof(cmdbuf), .buf = (u8 *) &cmdbuf },
+ { .addr = client->addr, .len = len, .buf = databuf,
+ .flags = I2C_M_RD } };
+ int ret;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret < 0)
+ dev_err(&client->dev, "failed reading register 0x%04x\n", cmd);
+
+ return ret;
+}
+
+static int vl6180_read_byte(struct i2c_client *client, u16 cmd)
+{
+ u8 data;
+ int ret;
+
+ ret = vl6180_read(client, cmd, &data, sizeof(data));
+ if (ret < 0)
+ return ret;
+
+ return data;
+}
+
+static int vl6180_read_word(struct i2c_client *client, u16 cmd)
+{
+ __be16 data;
+ int ret;
+
+ ret = vl6180_read(client, cmd, &data, sizeof(data));
+ if (ret < 0)
+ return ret;
+
+ return be16_to_cpu(data);
+}
+
+static int vl6180_write_byte(struct i2c_client *client, u16 cmd, u8 val)
+{
+ u8 buf[3];
+ struct i2c_msg msgs[1] = {
+ { .addr = client->addr, .len = sizeof(buf), .buf = (u8 *) &buf } };
+ int ret;
+
+ buf[0] = cmd >> 8;
+ buf[1] = cmd & 0xff;
+ buf[2] = val;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret < 0) {
+ dev_err(&client->dev, "failed writing register 0x%04x\n", cmd);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int vl6180_write_word(struct i2c_client *client, u16 cmd, u16 val)
+{
+ __be16 buf[2];
+ struct i2c_msg msgs[1] = {
+ { .addr = client->addr, .len = sizeof(buf), .buf = (u8 *) &buf } };
+ int ret;
+
+ buf[0] = cpu_to_be16(cmd);
+ buf[1] = cpu_to_be16(val);
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (ret < 0) {
+ dev_err(&client->dev, "failed writing register 0x%04x\n", cmd);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int vl6180_measure(struct vl6180_data *data, int addr)
+{
+ struct i2c_client *client = data->client;
+ int tries = 20, ret;
+ u16 value;
+
+ mutex_lock(&data->lock);
+ /* Start single shot measurement */
+ ret = vl6180_write_byte(client,
+ vl6180_chan_regs_table[addr].start_reg, VL6180_STARTSTOP);
+ if (ret < 0)
+ goto fail;
+
+ while (tries--) {
+ ret = vl6180_read_byte(client, VL6180_INTR_STATUS);
+ if (ret < 0)
+ goto fail;
+
+ if (ret & vl6180_chan_regs_table[addr].drdy_mask)
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ ret = -EIO;
+ goto fail;
+ }
+
+ /* Read result value from appropriate registers */
+ ret = vl6180_chan_regs_table[addr].word ?
+ vl6180_read_word(client, vl6180_chan_regs_table[addr].value_reg) :
+ vl6180_read_byte(client, vl6180_chan_regs_table[addr].value_reg);
+ if (ret < 0)
+ goto fail;
+ value = ret;
+
+ /* Clear the interrupt flag after data read */
+ ret = vl6180_write_byte(client, VL6180_INTR_CLEAR,
+ VL6180_CLEAR_ERROR | VL6180_CLEAR_ALS | VL6180_CLEAR_RANGE);
+ if (ret < 0)
+ goto fail;
+
+ ret = value;
+
+fail:
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static const struct iio_chan_spec vl6180_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .address = VL6180_ALS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_INT_TIME) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN),
+ }, {
+ .type = IIO_DISTANCE,
+ .address = VL6180_RANGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }, {
+ .type = IIO_PROXIMITY,
+ .address = VL6180_PROX,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ }
+};
+
+/*
+ * Available Ambient Light Sensor gain settings, 1/1000th, and
+ * corresponding setting for the VL6180_ALS_GAIN register
+ */
+static const int vl6180_als_gain_tab[8] = {
+ 1000, 1250, 1670, 2500, 5000, 10000, 20000, 40000
+};
+static const u8 vl6180_als_gain_tab_bits[8] = {
+ VL6180_ALS_GAIN_1, VL6180_ALS_GAIN_1_25,
+ VL6180_ALS_GAIN_1_67, VL6180_ALS_GAIN_2_5,
+ VL6180_ALS_GAIN_5, VL6180_ALS_GAIN_10,
+ VL6180_ALS_GAIN_20, VL6180_ALS_GAIN_40
+};
+
+static int vl6180_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct vl6180_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = vl6180_measure(data, chan->address);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = data->als_it_ms;
+ *val2 = 1000;
+
+ return IIO_VAL_FRACTIONAL;
+
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ /* one ALS count is 0.32 Lux @ gain 1, IT 100 ms */
+ *val = 32000; /* 0.32 * 1000 * 100 */
+ *val2 = data->als_gain_milli * data->als_it_ms;
+
+ return IIO_VAL_FRACTIONAL;
+
+ case IIO_DISTANCE:
+ *val = 0; /* sensor reports mm, scale to meter */
+ *val2 = 1000;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ *val = data->als_gain_milli;
+ *val2 = 1000;
+
+ return IIO_VAL_FRACTIONAL;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static IIO_CONST_ATTR(als_gain_available, "1 1.25 1.67 2.5 5 10 20 40");
+
+static struct attribute *vl6180_attributes[] = {
+ &iio_const_attr_als_gain_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group vl6180_attribute_group = {
+ .attrs = vl6180_attributes,
+};
+
+/* HOLD is needed before updating any config registers */
+static int vl6180_hold(struct vl6180_data *data, bool hold)
+{
+ return vl6180_write_byte(data->client, VL6180_HOLD,
+ hold ? VL6180_HOLD_ON : 0);
+}
+
+static int vl6180_set_als_gain(struct vl6180_data *data, int val, int val2)
+{
+ int i, ret, gain;
+
+ if (val < 1 || val > 40)
+ return -EINVAL;
+
+ gain = (val * 1000000 + val2) / 1000;
+ if (gain < 1 || gain > 40000)
+ return -EINVAL;
+
+ i = find_closest(gain, vl6180_als_gain_tab,
+ ARRAY_SIZE(vl6180_als_gain_tab));
+
+ mutex_lock(&data->lock);
+ ret = vl6180_hold(data, true);
+ if (ret < 0)
+ goto fail;
+
+ ret = vl6180_write_byte(data->client, VL6180_ALS_GAIN,
+ vl6180_als_gain_tab_bits[i]);
+
+ if (ret >= 0)
+ data->als_gain_milli = vl6180_als_gain_tab[i];
+
+fail:
+ vl6180_hold(data, false);
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int vl6180_set_it(struct vl6180_data *data, int val, int val2)
+{
+ int ret, it_ms;
+
+ it_ms = (val2 + 500) / 1000; /* round to ms */
+ if (val != 0 || it_ms < 1 || it_ms > 512)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = vl6180_hold(data, true);
+ if (ret < 0)
+ goto fail;
+
+ ret = vl6180_write_word(data->client, VL6180_ALS_IT, it_ms - 1);
+
+ if (ret >= 0)
+ data->als_it_ms = it_ms;
+
+fail:
+ vl6180_hold(data, false);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int vl6180_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct vl6180_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ return vl6180_set_it(data, val, val2);
+
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ return vl6180_set_als_gain(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info vl6180_info = {
+ .read_raw = vl6180_read_raw,
+ .write_raw = vl6180_write_raw,
+ .attrs = &vl6180_attribute_group,
+};
+
+static int vl6180_init(struct vl6180_data *data)
+{
+ struct i2c_client *client = data->client;
+ int ret;
+
+ ret = vl6180_read_byte(client, VL6180_MODEL_ID);
+ if (ret < 0)
+ return ret;
+
+ if (ret != VL6180_MODEL_ID_VAL) {
+ dev_err(&client->dev, "invalid model ID %02x\n", ret);
+ return -ENODEV;
+ }
+
+ ret = vl6180_hold(data, true);
+ if (ret < 0)
+ return ret;
+
+ ret = vl6180_read_byte(client, VL6180_OUT_OF_RESET);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Detect false reset condition here. This bit is always set when the
+ * system comes out of reset.
+ */
+ if (ret != 0x01)
+ dev_info(&client->dev, "device is not fresh out of reset\n");
+
+ /* Enable ALS and Range ready interrupts */
+ ret = vl6180_write_byte(client, VL6180_INTR_CONFIG,
+ VL6180_ALS_READY | VL6180_RANGE_READY);
+ if (ret < 0)
+ return ret;
+
+ /* ALS integration time: 100ms */
+ data->als_it_ms = 100;
+ ret = vl6180_write_word(client, VL6180_ALS_IT, VL6180_ALS_IT_100);
+ if (ret < 0)
+ return ret;
+
+ /* ALS gain: 1 */
+ data->als_gain_milli = 1000;
+ ret = vl6180_write_byte(client, VL6180_ALS_GAIN, VL6180_ALS_GAIN_1);
+ if (ret < 0)
+ return ret;
+
+ ret = vl6180_write_byte(client, VL6180_OUT_OF_RESET, 0x00);
+ if (ret < 0)
+ return ret;
+
+ return vl6180_hold(data, false);
+}
+
+static int vl6180_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct vl6180_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &vl6180_info;
+ indio_dev->channels = vl6180_channels;
+ indio_dev->num_channels = ARRAY_SIZE(vl6180_channels);
+ indio_dev->name = VL6180_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = vl6180_init(data);
+ if (ret < 0)
+ return ret;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct of_device_id vl6180_of_match[] = {
+ { .compatible = "st,vl6180", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, vl6180_of_match);
+
+static const struct i2c_device_id vl6180_id[] = {
+ { "vl6180", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, vl6180_id);
+
+static struct i2c_driver vl6180_driver = {
+ .driver = {
+ .name = VL6180_DRV_NAME,
+ .of_match_table = of_match_ptr(vl6180_of_match),
+ },
+ .probe = vl6180_probe,
+ .id_table = vl6180_id,
+};
+
+module_i2c_driver(vl6180_driver);
+
+MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
+MODULE_AUTHOR("Manivannan Sadhasivam <manivannanece23@gmail.com>");
+MODULE_DESCRIPTION("STMicro VL6180 ALS, range and proximity sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/zopt2201.c b/drivers/iio/light/zopt2201.c
new file mode 100644
index 0000000..041ac9e
--- /dev/null
+++ b/drivers/iio/light/zopt2201.c
@@ -0,0 +1,568 @@
+/*
+ * zopt2201.c - Support for IDT ZOPT2201 ambient light and UV B sensor
+ *
+ * Copyright 2017 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * Datasheet: https://www.idt.com/document/dst/zopt2201-datasheet
+ * 7-bit I2C slave addresses 0x53 (default) or 0x52 (programmed)
+ *
+ * TODO: interrupt support, ALS/UVB raw mode
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define ZOPT2201_DRV_NAME "zopt2201"
+
+/* Registers */
+#define ZOPT2201_MAIN_CTRL 0x00
+#define ZOPT2201_LS_MEAS_RATE 0x04
+#define ZOPT2201_LS_GAIN 0x05
+#define ZOPT2201_PART_ID 0x06
+#define ZOPT2201_MAIN_STATUS 0x07
+#define ZOPT2201_ALS_DATA 0x0d /* LSB first, 13 to 20 bits */
+#define ZOPT2201_UVB_DATA 0x10 /* LSB first, 13 to 20 bits */
+#define ZOPT2201_UV_COMP_DATA 0x13 /* LSB first, 13 to 20 bits */
+#define ZOPT2201_COMP_DATA 0x16 /* LSB first, 13 to 20 bits */
+#define ZOPT2201_INT_CFG 0x19
+#define ZOPT2201_INT_PST 0x1a
+
+#define ZOPT2201_MAIN_CTRL_LS_MODE BIT(3) /* 0 .. ALS, 1 .. UV B */
+#define ZOPT2201_MAIN_CTRL_LS_EN BIT(1)
+
+/* Values for ZOPT2201_LS_MEAS_RATE resolution / bit width */
+#define ZOPT2201_MEAS_RES_20BIT 0 /* takes 400 ms */
+#define ZOPT2201_MEAS_RES_19BIT 1 /* takes 200 ms */
+#define ZOPT2201_MEAS_RES_18BIT 2 /* takes 100 ms, default */
+#define ZOPT2201_MEAS_RES_17BIT 3 /* takes 50 ms */
+#define ZOPT2201_MEAS_RES_16BIT 4 /* takes 25 ms */
+#define ZOPT2201_MEAS_RES_13BIT 5 /* takes 3.125 ms */
+#define ZOPT2201_MEAS_RES_SHIFT 4
+
+/* Values for ZOPT2201_LS_MEAS_RATE measurement rate */
+#define ZOPT2201_MEAS_FREQ_25MS 0
+#define ZOPT2201_MEAS_FREQ_50MS 1
+#define ZOPT2201_MEAS_FREQ_100MS 2 /* default */
+#define ZOPT2201_MEAS_FREQ_200MS 3
+#define ZOPT2201_MEAS_FREQ_500MS 4
+#define ZOPT2201_MEAS_FREQ_1000MS 5
+#define ZOPT2201_MEAS_FREQ_2000MS 6
+
+/* Values for ZOPT2201_LS_GAIN */
+#define ZOPT2201_LS_GAIN_1 0
+#define ZOPT2201_LS_GAIN_3 1
+#define ZOPT2201_LS_GAIN_6 2
+#define ZOPT2201_LS_GAIN_9 3
+#define ZOPT2201_LS_GAIN_18 4
+
+/* Values for ZOPT2201_MAIN_STATUS */
+#define ZOPT2201_MAIN_STATUS_POWERON BIT(5)
+#define ZOPT2201_MAIN_STATUS_INT BIT(4)
+#define ZOPT2201_MAIN_STATUS_DRDY BIT(3)
+
+#define ZOPT2201_PART_NUMBER 0xb2
+
+struct zopt2201_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ u8 gain;
+ u8 res;
+ u8 rate;
+};
+
+static const struct {
+ unsigned int gain; /* gain factor */
+ unsigned int scale; /* micro lux per count */
+} zopt2201_gain_als[] = {
+ { 1, 19200000 },
+ { 3, 6400000 },
+ { 6, 3200000 },
+ { 9, 2133333 },
+ { 18, 1066666 },
+};
+
+static const struct {
+ unsigned int gain; /* gain factor */
+ unsigned int scale; /* micro W/m2 per count */
+} zopt2201_gain_uvb[] = {
+ { 1, 460800 },
+ { 3, 153600 },
+ { 6, 76800 },
+ { 9, 51200 },
+ { 18, 25600 },
+};
+
+static const struct {
+ unsigned int bits; /* sensor resolution in bits */
+ unsigned long us; /* measurement time in micro seconds */
+} zopt2201_resolution[] = {
+ { 20, 400000 },
+ { 19, 200000 },
+ { 18, 100000 },
+ { 17, 50000 },
+ { 16, 25000 },
+ { 13, 3125 },
+};
+
+static const struct {
+ unsigned int scale, uscale; /* scale factor as integer + micro */
+ u8 gain; /* gain register value */
+ u8 res; /* resolution register value */
+} zopt2201_scale_als[] = {
+ { 19, 200000, 0, 5 },
+ { 6, 400000, 1, 5 },
+ { 3, 200000, 2, 5 },
+ { 2, 400000, 0, 4 },
+ { 2, 133333, 3, 5 },
+ { 1, 200000, 0, 3 },
+ { 1, 66666, 4, 5 },
+ { 0, 800000, 1, 4 },
+ { 0, 600000, 0, 2 },
+ { 0, 400000, 2, 4 },
+ { 0, 300000, 0, 1 },
+ { 0, 266666, 3, 4 },
+ { 0, 200000, 2, 3 },
+ { 0, 150000, 0, 0 },
+ { 0, 133333, 4, 4 },
+ { 0, 100000, 2, 2 },
+ { 0, 66666, 4, 3 },
+ { 0, 50000, 2, 1 },
+ { 0, 33333, 4, 2 },
+ { 0, 25000, 2, 0 },
+ { 0, 16666, 4, 1 },
+ { 0, 8333, 4, 0 },
+};
+
+static const struct {
+ unsigned int scale, uscale; /* scale factor as integer + micro */
+ u8 gain; /* gain register value */
+ u8 res; /* resolution register value */
+} zopt2201_scale_uvb[] = {
+ { 0, 460800, 0, 5 },
+ { 0, 153600, 1, 5 },
+ { 0, 76800, 2, 5 },
+ { 0, 57600, 0, 4 },
+ { 0, 51200, 3, 5 },
+ { 0, 28800, 0, 3 },
+ { 0, 25600, 4, 5 },
+ { 0, 19200, 1, 4 },
+ { 0, 14400, 0, 2 },
+ { 0, 9600, 2, 4 },
+ { 0, 7200, 0, 1 },
+ { 0, 6400, 3, 4 },
+ { 0, 4800, 2, 3 },
+ { 0, 3600, 0, 0 },
+ { 0, 3200, 4, 4 },
+ { 0, 2400, 2, 2 },
+ { 0, 1600, 4, 3 },
+ { 0, 1200, 2, 1 },
+ { 0, 800, 4, 2 },
+ { 0, 600, 2, 0 },
+ { 0, 400, 4, 1 },
+ { 0, 200, 4, 0 },
+};
+
+static int zopt2201_enable_mode(struct zopt2201_data *data, bool uvb_mode)
+{
+ u8 out = ZOPT2201_MAIN_CTRL_LS_EN;
+
+ if (uvb_mode)
+ out |= ZOPT2201_MAIN_CTRL_LS_MODE;
+
+ return i2c_smbus_write_byte_data(data->client, ZOPT2201_MAIN_CTRL, out);
+}
+
+static int zopt2201_read(struct zopt2201_data *data, u8 reg)
+{
+ struct i2c_client *client = data->client;
+ int tries = 10;
+ u8 buf[3];
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = zopt2201_enable_mode(data, reg == ZOPT2201_UVB_DATA);
+ if (ret < 0)
+ goto fail;
+
+ while (tries--) {
+ unsigned long t = zopt2201_resolution[data->res].us;
+
+ if (t <= 20000)
+ usleep_range(t, t + 1000);
+ else
+ msleep(t / 1000);
+ ret = i2c_smbus_read_byte_data(client, ZOPT2201_MAIN_STATUS);
+ if (ret < 0)
+ goto fail;
+ if (ret & ZOPT2201_MAIN_STATUS_DRDY)
+ break;
+ }
+
+ if (tries < 0) {
+ ret = -ETIMEDOUT;
+ goto fail;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data(client, reg, sizeof(buf), buf);
+ if (ret < 0)
+ goto fail;
+
+ ret = i2c_smbus_write_byte_data(client, ZOPT2201_MAIN_CTRL, 0x00);
+ if (ret < 0)
+ goto fail;
+ mutex_unlock(&data->lock);
+
+ return (buf[2] << 16) | (buf[1] << 8) | buf[0];
+
+fail:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static const struct iio_chan_spec zopt2201_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .address = ZOPT2201_ALS_DATA,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+ {
+ .type = IIO_INTENSITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_UV,
+ .address = ZOPT2201_UVB_DATA,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+ {
+ .type = IIO_UVINDEX,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ },
+};
+
+static int zopt2201_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct zopt2201_data *data = iio_priv(indio_dev);
+ u64 tmp;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = zopt2201_read(data, chan->address);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_PROCESSED:
+ ret = zopt2201_read(data, ZOPT2201_UVB_DATA);
+ if (ret < 0)
+ return ret;
+ *val = ret * 18 *
+ (1 << (20 - zopt2201_resolution[data->res].bits)) /
+ zopt2201_gain_uvb[data->gain].gain;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->address) {
+ case ZOPT2201_ALS_DATA:
+ *val = zopt2201_gain_als[data->gain].scale;
+ break;
+ case ZOPT2201_UVB_DATA:
+ *val = zopt2201_gain_uvb[data->gain].scale;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *val2 = 1000000;
+ *val2 *= (1 << (zopt2201_resolution[data->res].bits - 13));
+ tmp = div_s64(*val * 1000000ULL, *val2);
+ *val = div_s64_rem(tmp, 1000000, val2);
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = zopt2201_resolution[data->res].us;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int zopt2201_set_resolution(struct zopt2201_data *data, u8 res)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, ZOPT2201_LS_MEAS_RATE,
+ (res << ZOPT2201_MEAS_RES_SHIFT) |
+ data->rate);
+ if (ret < 0)
+ return ret;
+
+ data->res = res;
+
+ return 0;
+}
+
+static int zopt2201_write_resolution(struct zopt2201_data *data,
+ int val, int val2)
+{
+ int i, ret;
+
+ if (val != 0)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_resolution); i++)
+ if (val2 == zopt2201_resolution[i].us) {
+ mutex_lock(&data->lock);
+ ret = zopt2201_set_resolution(data, i);
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static int zopt2201_set_gain(struct zopt2201_data *data, u8 gain)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, ZOPT2201_LS_GAIN, gain);
+ if (ret < 0)
+ return ret;
+
+ data->gain = gain;
+
+ return 0;
+}
+
+static int zopt2201_write_scale_als_by_idx(struct zopt2201_data *data, int idx)
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = zopt2201_set_resolution(data, zopt2201_scale_als[idx].res);
+ if (ret < 0)
+ goto unlock;
+
+ ret = zopt2201_set_gain(data, zopt2201_scale_als[idx].gain);
+
+unlock:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int zopt2201_write_scale_als(struct zopt2201_data *data,
+ int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_scale_als); i++)
+ if (val == zopt2201_scale_als[i].scale &&
+ val2 == zopt2201_scale_als[i].uscale) {
+ return zopt2201_write_scale_als_by_idx(data, i);
+ }
+
+ return -EINVAL;
+}
+
+static int zopt2201_write_scale_uvb_by_idx(struct zopt2201_data *data, int idx)
+{
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = zopt2201_set_resolution(data, zopt2201_scale_als[idx].res);
+ if (ret < 0)
+ goto unlock;
+
+ ret = zopt2201_set_gain(data, zopt2201_scale_als[idx].gain);
+
+unlock:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static int zopt2201_write_scale_uvb(struct zopt2201_data *data,
+ int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_scale_uvb); i++)
+ if (val == zopt2201_scale_uvb[i].scale &&
+ val2 == zopt2201_scale_uvb[i].uscale)
+ return zopt2201_write_scale_uvb_by_idx(data, i);
+
+ return -EINVAL;
+}
+
+static int zopt2201_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct zopt2201_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ return zopt2201_write_resolution(data, val, val2);
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->address) {
+ case ZOPT2201_ALS_DATA:
+ return zopt2201_write_scale_als(data, val, val2);
+ case ZOPT2201_UVB_DATA:
+ return zopt2201_write_scale_uvb(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static ssize_t zopt2201_show_int_time_available(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_resolution); i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06lu ",
+ zopt2201_resolution[i].us);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_INT_TIME_AVAIL(zopt2201_show_int_time_available);
+
+static ssize_t zopt2201_show_als_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_scale_als); i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ",
+ zopt2201_scale_als[i].scale,
+ zopt2201_scale_als[i].uscale);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t zopt2201_show_uvb_scale_avail(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ ssize_t len = 0;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(zopt2201_scale_uvb); i++)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06u ",
+ zopt2201_scale_uvb[i].scale,
+ zopt2201_scale_uvb[i].uscale);
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEVICE_ATTR(in_illuminance_scale_available, 0444,
+ zopt2201_show_als_scale_avail, NULL, 0);
+static IIO_DEVICE_ATTR(in_intensity_uv_scale_available, 0444,
+ zopt2201_show_uvb_scale_avail, NULL, 0);
+
+static struct attribute *zopt2201_attributes[] = {
+ &iio_dev_attr_integration_time_available.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_scale_available.dev_attr.attr,
+ &iio_dev_attr_in_intensity_uv_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group zopt2201_attribute_group = {
+ .attrs = zopt2201_attributes,
+};
+
+static const struct iio_info zopt2201_info = {
+ .read_raw = zopt2201_read_raw,
+ .write_raw = zopt2201_write_raw,
+ .attrs = &zopt2201_attribute_group,
+};
+
+static int zopt2201_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct zopt2201_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_I2C_BLOCK))
+ return -EOPNOTSUPP;
+
+ ret = i2c_smbus_read_byte_data(client, ZOPT2201_PART_ID);
+ if (ret < 0)
+ return ret;
+ if (ret != ZOPT2201_PART_NUMBER)
+ return -ENODEV;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ mutex_init(&data->lock);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &zopt2201_info;
+ indio_dev->channels = zopt2201_channels;
+ indio_dev->num_channels = ARRAY_SIZE(zopt2201_channels);
+ indio_dev->name = ZOPT2201_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ data->rate = ZOPT2201_MEAS_FREQ_100MS;
+ ret = zopt2201_set_resolution(data, ZOPT2201_MEAS_RES_18BIT);
+ if (ret < 0)
+ return ret;
+
+ ret = zopt2201_set_gain(data, ZOPT2201_LS_GAIN_3);
+ if (ret < 0)
+ return ret;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static const struct i2c_device_id zopt2201_id[] = {
+ { "zopt2201", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, zopt2201_id);
+
+static struct i2c_driver zopt2201_driver = {
+ .driver = {
+ .name = ZOPT2201_DRV_NAME,
+ },
+ .probe = zopt2201_probe,
+ .id_table = zopt2201_id,
+};
+
+module_i2c_driver(zopt2201_driver);
+
+MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("IDT ZOPT2201 ambient light and UV B sensor driver");
+MODULE_LICENSE("GPL");