Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
index 20b3669..b896f7f 100644
--- a/drivers/iio/adc/lpc32xx_adc.c
+++ b/drivers/iio/adc/lpc32xx_adc.c
@@ -1,39 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* lpc32xx_adc.c - Support for ADC in LPC32XX
*
* 3-channel, 10-bit ADC
*
* Copyright (C) 2011, 2012 Roland Stigge <stigge@antcom.de>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/err.h>
+#include <linux/iio/iio.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/completion.h>
-#include <linux/of.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
+#include <linux/regulator/consumer.h>
/*
* LPC32XX registers definitions
@@ -65,6 +47,7 @@
void __iomem *adc_base;
struct clk *clk;
struct completion completion;
+ struct regulator *vref;
u32 value;
};
@@ -77,7 +60,9 @@
{
struct lpc32xx_adc_state *st = iio_priv(indio_dev);
int ret;
- if (mask == IIO_CHAN_INFO_RAW) {
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
mutex_lock(&indio_dev->mlock);
ret = clk_prepare_enable(st->clk);
if (ret) {
@@ -97,22 +82,36 @@
mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
- }
- return -EINVAL;
+ case IIO_CHAN_INFO_SCALE:
+ *val = regulator_get_voltage(st->vref) / 1000;
+ *val2 = 10;
+
+ return IIO_VAL_FRACTIONAL_LOG2;
+ default:
+ return -EINVAL;
+ }
}
static const struct iio_info lpc32xx_adc_iio_info = {
.read_raw = &lpc32xx_read_raw,
};
-#define LPC32XX_ADC_CHANNEL(_index) { \
+#define LPC32XX_ADC_CHANNEL_BASE(_index) \
.type = IIO_VOLTAGE, \
.indexed = 1, \
.channel = _index, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.address = LPC32XXAD_IN * _index, \
- .scan_index = _index, \
+ .scan_index = _index,
+
+#define LPC32XX_ADC_CHANNEL(_index) { \
+ LPC32XX_ADC_CHANNEL_BASE(_index) \
+}
+
+#define LPC32XX_ADC_SCALE_CHANNEL(_index) { \
+ LPC32XX_ADC_CHANNEL_BASE(_index) \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \
}
static const struct iio_chan_spec lpc32xx_adc_iio_channels[] = {
@@ -121,6 +120,12 @@
LPC32XX_ADC_CHANNEL(2),
};
+static const struct iio_chan_spec lpc32xx_adc_iio_scale_channels[] = {
+ LPC32XX_ADC_SCALE_CHANNEL(0),
+ LPC32XX_ADC_SCALE_CHANNEL(1),
+ LPC32XX_ADC_SCALE_CHANNEL(2),
+};
+
static irqreturn_t lpc32xx_adc_isr(int irq, void *dev_id)
{
struct lpc32xx_adc_state *st = dev_id;
@@ -167,10 +172,8 @@
}
irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_err(&pdev->dev, "failed getting interrupt resource\n");
+ if (irq <= 0)
return -ENXIO;
- }
retval = devm_request_irq(&pdev->dev, irq, lpc32xx_adc_isr, 0,
LPC32XXAD_NAME, st);
@@ -179,6 +182,15 @@
return retval;
}
+ st->vref = devm_regulator_get(&pdev->dev, "vref");
+ if (IS_ERR(st->vref)) {
+ iodev->channels = lpc32xx_adc_iio_channels;
+ dev_info(&pdev->dev,
+ "Missing vref regulator: No scaling available\n");
+ } else {
+ iodev->channels = lpc32xx_adc_iio_scale_channels;
+ }
+
platform_set_drvdata(pdev, iodev);
init_completion(&st->completion);
@@ -187,7 +199,6 @@
iodev->dev.parent = &pdev->dev;
iodev->info = &lpc32xx_adc_iio_info;
iodev->modes = INDIO_DIRECT_MODE;
- iodev->channels = lpc32xx_adc_iio_channels;
iodev->num_channels = ARRAY_SIZE(lpc32xx_adc_iio_channels);
retval = devm_iio_device_register(&pdev->dev, iodev);