v4.19.13 snapshot.
diff --git a/drivers/phy/motorola/Kconfig b/drivers/phy/motorola/Kconfig
new file mode 100644
index 0000000..8265152
--- /dev/null
+++ b/drivers/phy/motorola/Kconfig
@@ -0,0 +1,20 @@
+#
+# Phy drivers for Motorola devices
+#
+config PHY_CPCAP_USB
+ tristate "CPCAP PMIC USB PHY driver"
+ depends on USB_SUPPORT && IIO
+ depends on USB_MUSB_HDRC || USB_MUSB_HDRC=n
+ select GENERIC_PHY
+ select USB_PHY
+ help
+ Enable this for USB to work on Motorola phones and tablets
+ such as Droid 4.
+
+config PHY_MAPPHONE_MDM6600
+ tristate "Motorola Mapphone MDM6600 modem USB PHY driver"
+ depends on OF && USB_SUPPORT
+ select GENERIC_PHY
+ help
+ Enable this for MDM6600 USB modem to work on Motorola phones
+ and tablets such as Droid 4.
diff --git a/drivers/phy/motorola/Makefile b/drivers/phy/motorola/Makefile
new file mode 100644
index 0000000..3514f98
--- /dev/null
+++ b/drivers/phy/motorola/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the phy drivers.
+#
+
+obj-$(CONFIG_PHY_CPCAP_USB) += phy-cpcap-usb.o
+obj-$(CONFIG_PHY_MAPPHONE_MDM6600) += phy-mapphone-mdm6600.o
diff --git a/drivers/phy/motorola/phy-cpcap-usb.c b/drivers/phy/motorola/phy-cpcap-usb.c
new file mode 100644
index 0000000..6601ad0
--- /dev/null
+++ b/drivers/phy/motorola/phy-cpcap-usb.c
@@ -0,0 +1,676 @@
+/*
+ * Motorola CPCAP PMIC USB PHY driver
+ * Copyright (C) 2017 Tony Lindgren <tony@atomide.com>
+ *
+ * Some parts based on earlier Motorola Linux kernel tree code in
+ * board-mapphone-usb.c and cpcap-usb-det.c:
+ * Copyright (C) 2007 - 2011 Motorola, Inc.
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/atomic.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/iio/consumer.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/mfd/motorola-cpcap.h>
+#include <linux/phy/omap_usb.h>
+#include <linux/phy/phy.h>
+#include <linux/regulator/consumer.h>
+#include <linux/usb/musb.h>
+
+/* CPCAP_REG_USBC1 register bits */
+#define CPCAP_BIT_IDPULSE BIT(15)
+#define CPCAP_BIT_ID100KPU BIT(14)
+#define CPCAP_BIT_IDPUCNTRL BIT(13)
+#define CPCAP_BIT_IDPU BIT(12)
+#define CPCAP_BIT_IDPD BIT(11)
+#define CPCAP_BIT_VBUSCHRGTMR3 BIT(10)
+#define CPCAP_BIT_VBUSCHRGTMR2 BIT(9)
+#define CPCAP_BIT_VBUSCHRGTMR1 BIT(8)
+#define CPCAP_BIT_VBUSCHRGTMR0 BIT(7)
+#define CPCAP_BIT_VBUSPU BIT(6)
+#define CPCAP_BIT_VBUSPD BIT(5)
+#define CPCAP_BIT_DMPD BIT(4)
+#define CPCAP_BIT_DPPD BIT(3)
+#define CPCAP_BIT_DM1K5PU BIT(2)
+#define CPCAP_BIT_DP1K5PU BIT(1)
+#define CPCAP_BIT_DP150KPU BIT(0)
+
+/* CPCAP_REG_USBC2 register bits */
+#define CPCAP_BIT_ZHSDRV1 BIT(15)
+#define CPCAP_BIT_ZHSDRV0 BIT(14)
+#define CPCAP_BIT_DPLLCLKREQ BIT(13)
+#define CPCAP_BIT_SE0CONN BIT(12)
+#define CPCAP_BIT_UARTTXTRI BIT(11)
+#define CPCAP_BIT_UARTSWAP BIT(10)
+#define CPCAP_BIT_UARTMUX1 BIT(9)
+#define CPCAP_BIT_UARTMUX0 BIT(8)
+#define CPCAP_BIT_ULPISTPLOW BIT(7)
+#define CPCAP_BIT_TXENPOL BIT(6)
+#define CPCAP_BIT_USBXCVREN BIT(5)
+#define CPCAP_BIT_USBCNTRL BIT(4)
+#define CPCAP_BIT_USBSUSPEND BIT(3)
+#define CPCAP_BIT_EMUMODE2 BIT(2)
+#define CPCAP_BIT_EMUMODE1 BIT(1)
+#define CPCAP_BIT_EMUMODE0 BIT(0)
+
+/* CPCAP_REG_USBC3 register bits */
+#define CPCAP_BIT_SPARE_898_15 BIT(15)
+#define CPCAP_BIT_IHSTX03 BIT(14)
+#define CPCAP_BIT_IHSTX02 BIT(13)
+#define CPCAP_BIT_IHSTX01 BIT(12)
+#define CPCAP_BIT_IHSTX0 BIT(11)
+#define CPCAP_BIT_IDPU_SPI BIT(10)
+#define CPCAP_BIT_UNUSED_898_9 BIT(9)
+#define CPCAP_BIT_VBUSSTBY_EN BIT(8)
+#define CPCAP_BIT_VBUSEN_SPI BIT(7)
+#define CPCAP_BIT_VBUSPU_SPI BIT(6)
+#define CPCAP_BIT_VBUSPD_SPI BIT(5)
+#define CPCAP_BIT_DMPD_SPI BIT(4)
+#define CPCAP_BIT_DPPD_SPI BIT(3)
+#define CPCAP_BIT_SUSPEND_SPI BIT(2)
+#define CPCAP_BIT_PU_SPI BIT(1)
+#define CPCAP_BIT_ULPI_SPI_SEL BIT(0)
+
+struct cpcap_usb_ints_state {
+ bool id_ground;
+ bool id_float;
+ bool chrg_det;
+ bool rvrs_chrg;
+ bool vbusov;
+
+ bool chrg_se1b;
+ bool se0conn;
+ bool rvrs_mode;
+ bool chrgcurr1;
+ bool vbusvld;
+ bool sessvld;
+ bool sessend;
+ bool se1;
+
+ bool battdetb;
+ bool dm;
+ bool dp;
+};
+
+enum cpcap_gpio_mode {
+ CPCAP_DM_DP,
+ CPCAP_MDM_RX_TX,
+ CPCAP_UNKNOWN,
+ CPCAP_OTG_DM_DP,
+};
+
+struct cpcap_phy_ddata {
+ struct regmap *reg;
+ struct device *dev;
+ struct clk *refclk;
+ struct usb_phy phy;
+ struct delayed_work detect_work;
+ struct pinctrl *pins;
+ struct pinctrl_state *pins_ulpi;
+ struct pinctrl_state *pins_utmi;
+ struct pinctrl_state *pins_uart;
+ struct gpio_desc *gpio[2];
+ struct iio_channel *vbus;
+ struct iio_channel *id;
+ struct regulator *vusb;
+ atomic_t active;
+};
+
+static bool cpcap_usb_vbus_valid(struct cpcap_phy_ddata *ddata)
+{
+ int error, value = 0;
+
+ error = iio_read_channel_processed(ddata->vbus, &value);
+ if (error >= 0)
+ return value > 3900 ? true : false;
+
+ dev_err(ddata->dev, "error reading VBUS: %i\n", error);
+
+ return false;
+}
+
+static int cpcap_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host)
+{
+ otg->host = host;
+ if (!host)
+ otg->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static int cpcap_usb_phy_set_peripheral(struct usb_otg *otg,
+ struct usb_gadget *gadget)
+{
+ otg->gadget = gadget;
+ if (!gadget)
+ otg->state = OTG_STATE_UNDEFINED;
+
+ return 0;
+}
+
+static const struct phy_ops ops = {
+ .owner = THIS_MODULE,
+};
+
+static int cpcap_phy_get_ints_state(struct cpcap_phy_ddata *ddata,
+ struct cpcap_usb_ints_state *s)
+{
+ int val, error;
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val);
+ if (error)
+ return error;
+
+ s->id_ground = val & BIT(15);
+ s->id_float = val & BIT(14);
+ s->vbusov = val & BIT(11);
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val);
+ if (error)
+ return error;
+
+ s->vbusvld = val & BIT(3);
+ s->sessvld = val & BIT(2);
+ s->sessend = val & BIT(1);
+ s->se1 = val & BIT(0);
+
+ error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val);
+ if (error)
+ return error;
+
+ s->dm = val & BIT(1);
+ s->dp = val & BIT(0);
+
+ return 0;
+}
+
+static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata);
+static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata);
+
+static void cpcap_usb_detect(struct work_struct *work)
+{
+ struct cpcap_phy_ddata *ddata;
+ struct cpcap_usb_ints_state s;
+ bool vbus = false;
+ int error;
+
+ ddata = container_of(work, struct cpcap_phy_ddata, detect_work.work);
+
+ error = cpcap_phy_get_ints_state(ddata, &s);
+ if (error)
+ return;
+
+ if (s.id_ground) {
+ dev_dbg(ddata->dev, "id ground, USB host mode\n");
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+
+ error = musb_mailbox(MUSB_ID_GROUND);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_VBUSSTBY_EN,
+ CPCAP_BIT_VBUSSTBY_EN);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_VBUSSTBY_EN, 0);
+ if (error)
+ goto out_err;
+
+ vbus = cpcap_usb_vbus_valid(ddata);
+
+ if (vbus) {
+ /* Are we connected to a docking station with vbus? */
+ if (s.id_ground) {
+ dev_dbg(ddata->dev, "connected to a dock\n");
+
+ /* No VBUS needed with docks */
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+ error = musb_mailbox(MUSB_ID_GROUND);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ /* Otherwise assume we're connected to a USB host */
+ dev_dbg(ddata->dev, "connected to USB host\n");
+ error = cpcap_usb_set_usb_mode(ddata);
+ if (error)
+ goto out_err;
+ error = musb_mailbox(MUSB_VBUS_VALID);
+ if (error)
+ goto out_err;
+
+ return;
+ }
+
+ /* Default to debug UART mode */
+ error = cpcap_usb_set_uart_mode(ddata);
+ if (error)
+ goto out_err;
+
+ error = musb_mailbox(MUSB_VBUS_OFF);
+ if (error)
+ goto out_err;
+
+ dev_dbg(ddata->dev, "set UART mode\n");
+
+ return;
+
+out_err:
+ dev_err(ddata->dev, "error setting cable state: %i\n", error);
+}
+
+static irqreturn_t cpcap_phy_irq_thread(int irq, void *data)
+{
+ struct cpcap_phy_ddata *ddata = data;
+
+ if (!atomic_read(&ddata->active))
+ return IRQ_NONE;
+
+ schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));
+
+ return IRQ_HANDLED;
+}
+
+static int cpcap_usb_init_irq(struct platform_device *pdev,
+ struct cpcap_phy_ddata *ddata,
+ const char *name)
+{
+ int irq, error;
+
+ irq = platform_get_irq_byname(pdev, name);
+ if (irq < 0)
+ return -ENODEV;
+
+ error = devm_request_threaded_irq(ddata->dev, irq, NULL,
+ cpcap_phy_irq_thread,
+ IRQF_SHARED,
+ name, ddata);
+ if (error) {
+ dev_err(ddata->dev, "could not get irq %s: %i\n",
+ name, error);
+
+ return error;
+ }
+
+ return 0;
+}
+
+static const char * const cpcap_phy_irqs[] = {
+ /* REG_INT_0 */
+ "id_ground", "id_float",
+
+ /* REG_INT1 */
+ "se0conn", "vbusvld", "sessvld", "sessend", "se1",
+
+ /* REG_INT_3 */
+ "dm", "dp",
+};
+
+static int cpcap_usb_init_interrupts(struct platform_device *pdev,
+ struct cpcap_phy_ddata *ddata)
+{
+ int i, error;
+
+ for (i = 0; i < ARRAY_SIZE(cpcap_phy_irqs); i++) {
+ error = cpcap_usb_init_irq(pdev, ddata, cpcap_phy_irqs[i]);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+/*
+ * Optional pins and modes. At least Motorola mapphone devices
+ * are using two GPIOs and dynamic pinctrl to multiplex PHY pins
+ * to UART, ULPI or UTMI mode.
+ */
+
+static int cpcap_usb_gpio_set_mode(struct cpcap_phy_ddata *ddata,
+ enum cpcap_gpio_mode mode)
+{
+ if (!ddata->gpio[0] || !ddata->gpio[1])
+ return 0;
+
+ gpiod_set_value(ddata->gpio[0], mode & 1);
+ gpiod_set_value(ddata->gpio[1], mode >> 1);
+
+ return 0;
+}
+
+static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata)
+{
+ int error;
+
+ error = cpcap_usb_gpio_set_mode(ddata, CPCAP_DM_DP);
+ if (error)
+ goto out_err;
+
+ if (ddata->pins_uart) {
+ error = pinctrl_select_state(ddata->pins, ddata->pins_uart);
+ if (error)
+ goto out_err;
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,
+ CPCAP_BIT_VBUSPD,
+ CPCAP_BIT_VBUSPD);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ 0xffff, CPCAP_BIT_UARTMUX0 |
+ CPCAP_BIT_EMUMODE0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff,
+ CPCAP_BIT_IDPU_SPI);
+ if (error)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
+
+ return error;
+}
+
+static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata)
+{
+ int error;
+
+ error = cpcap_usb_gpio_set_mode(ddata, CPCAP_OTG_DM_DP);
+ if (error)
+ return error;
+
+ if (ddata->pins_utmi) {
+ error = pinctrl_select_state(ddata->pins, ddata->pins_utmi);
+ if (error) {
+ dev_err(ddata->dev, "could not set usb mode: %i\n",
+ error);
+
+ return error;
+ }
+ }
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1,
+ CPCAP_BIT_VBUSPD, 0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ CPCAP_BIT_USBXCVREN,
+ CPCAP_BIT_USBXCVREN);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3,
+ CPCAP_BIT_PU_SPI |
+ CPCAP_BIT_DMPD_SPI |
+ CPCAP_BIT_DPPD_SPI |
+ CPCAP_BIT_SUSPEND_SPI |
+ CPCAP_BIT_ULPI_SPI_SEL, 0);
+ if (error)
+ goto out_err;
+
+ error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2,
+ CPCAP_BIT_USBXCVREN,
+ CPCAP_BIT_USBXCVREN);
+ if (error)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "%s failed with %i\n", __func__, error);
+
+ return error;
+}
+
+static int cpcap_usb_init_optional_pins(struct cpcap_phy_ddata *ddata)
+{
+ ddata->pins = devm_pinctrl_get(ddata->dev);
+ if (IS_ERR(ddata->pins)) {
+ dev_info(ddata->dev, "default pins not configured: %ld\n",
+ PTR_ERR(ddata->pins));
+ ddata->pins = NULL;
+
+ return 0;
+ }
+
+ ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi");
+ if (IS_ERR(ddata->pins_ulpi)) {
+ dev_info(ddata->dev, "ulpi pins not configured\n");
+ ddata->pins_ulpi = NULL;
+ }
+
+ ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi");
+ if (IS_ERR(ddata->pins_utmi)) {
+ dev_info(ddata->dev, "utmi pins not configured\n");
+ ddata->pins_utmi = NULL;
+ }
+
+ ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart");
+ if (IS_ERR(ddata->pins_uart)) {
+ dev_info(ddata->dev, "uart pins not configured\n");
+ ddata->pins_uart = NULL;
+ }
+
+ if (ddata->pins_uart)
+ return pinctrl_select_state(ddata->pins, ddata->pins_uart);
+
+ return 0;
+}
+
+static void cpcap_usb_init_optional_gpios(struct cpcap_phy_ddata *ddata)
+{
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode",
+ i, GPIOD_OUT_HIGH);
+ if (IS_ERR(ddata->gpio[i])) {
+ dev_info(ddata->dev, "no mode change GPIO%i: %li\n",
+ i, PTR_ERR(ddata->gpio[i]));
+ ddata->gpio[i] = NULL;
+ }
+ }
+}
+
+static int cpcap_usb_init_iio(struct cpcap_phy_ddata *ddata)
+{
+ enum iio_chan_type type;
+ int error;
+
+ ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus");
+ if (IS_ERR(ddata->vbus)) {
+ error = PTR_ERR(ddata->vbus);
+ goto out_err;
+ }
+
+ if (!ddata->vbus->indio_dev) {
+ error = -ENXIO;
+ goto out_err;
+ }
+
+ error = iio_get_channel_type(ddata->vbus, &type);
+ if (error < 0)
+ goto out_err;
+
+ if (type != IIO_VOLTAGE) {
+ error = -EINVAL;
+ goto out_err;
+ }
+
+ return 0;
+
+out_err:
+ dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n",
+ error);
+
+ return error;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id cpcap_usb_phy_id_table[] = {
+ {
+ .compatible = "motorola,cpcap-usb-phy",
+ },
+ {
+ .compatible = "motorola,mapphone-cpcap-usb-phy",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cpcap_usb_phy_id_table);
+#endif
+
+static int cpcap_usb_phy_probe(struct platform_device *pdev)
+{
+ struct cpcap_phy_ddata *ddata;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct usb_otg *otg;
+ const struct of_device_id *of_id;
+ int error;
+
+ of_id = of_match_device(of_match_ptr(cpcap_usb_phy_id_table),
+ &pdev->dev);
+ if (!of_id)
+ return -EINVAL;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ ddata->reg = dev_get_regmap(pdev->dev.parent, NULL);
+ if (!ddata->reg)
+ return -ENODEV;
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ ddata->dev = &pdev->dev;
+ ddata->phy.dev = ddata->dev;
+ ddata->phy.label = "cpcap_usb_phy";
+ ddata->phy.otg = otg;
+ ddata->phy.type = USB_PHY_TYPE_USB2;
+ otg->set_host = cpcap_usb_phy_set_host;
+ otg->set_peripheral = cpcap_usb_phy_set_peripheral;
+ otg->usb_phy = &ddata->phy;
+ INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect);
+ platform_set_drvdata(pdev, ddata);
+
+ ddata->vusb = devm_regulator_get(&pdev->dev, "vusb");
+ if (IS_ERR(ddata->vusb))
+ return PTR_ERR(ddata->vusb);
+
+ error = regulator_enable(ddata->vusb);
+ if (error)
+ return error;
+
+ generic_phy = devm_phy_create(ddata->dev, NULL, &ops);
+ if (IS_ERR(generic_phy)) {
+ error = PTR_ERR(generic_phy);
+ return PTR_ERR(generic_phy);
+ }
+
+ phy_set_drvdata(generic_phy, ddata);
+
+ phy_provider = devm_of_phy_provider_register(ddata->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ error = cpcap_usb_init_optional_pins(ddata);
+ if (error)
+ return error;
+
+ cpcap_usb_init_optional_gpios(ddata);
+
+ error = cpcap_usb_init_iio(ddata);
+ if (error)
+ return error;
+
+ error = cpcap_usb_init_interrupts(pdev, ddata);
+ if (error)
+ return error;
+
+ usb_add_phy_dev(&ddata->phy);
+ atomic_set(&ddata->active, 1);
+ schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1));
+
+ return 0;
+}
+
+static int cpcap_usb_phy_remove(struct platform_device *pdev)
+{
+ struct cpcap_phy_ddata *ddata = platform_get_drvdata(pdev);
+ int error;
+
+ atomic_set(&ddata->active, 0);
+ error = cpcap_usb_set_uart_mode(ddata);
+ if (error)
+ dev_err(ddata->dev, "could not set UART mode\n");
+
+ error = musb_mailbox(MUSB_VBUS_OFF);
+ if (error)
+ dev_err(ddata->dev, "could not set mailbox\n");
+
+ usb_remove_phy(&ddata->phy);
+ cancel_delayed_work_sync(&ddata->detect_work);
+ clk_unprepare(ddata->refclk);
+ regulator_disable(ddata->vusb);
+
+ return 0;
+}
+
+static struct platform_driver cpcap_usb_phy_driver = {
+ .probe = cpcap_usb_phy_probe,
+ .remove = cpcap_usb_phy_remove,
+ .driver = {
+ .name = "cpcap-usb-phy",
+ .of_match_table = of_match_ptr(cpcap_usb_phy_id_table),
+ },
+};
+
+module_platform_driver(cpcap_usb_phy_driver);
+
+MODULE_ALIAS("platform:cpcap_usb");
+MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
+MODULE_DESCRIPTION("CPCAP usb phy driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/phy/motorola/phy-mapphone-mdm6600.c b/drivers/phy/motorola/phy-mapphone-mdm6600.c
new file mode 100644
index 0000000..0075fb0
--- /dev/null
+++ b/drivers/phy/motorola/phy-mapphone-mdm6600.c
@@ -0,0 +1,627 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Motorola Mapphone MDM6600 modem GPIO controlled USB PHY driver
+ * Copyright (C) 2018 Tony Lindgren <tony@atomide.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+
+#define PHY_MDM6600_PHY_DELAY_MS 4000 /* PHY enable 2.2s to 3.5s */
+#define PHY_MDM6600_ENABLED_DELAY_MS 8000 /* 8s more total for MDM6600 */
+#define MDM6600_MODEM_IDLE_DELAY_MS 1000 /* modem after USB suspend */
+#define MDM6600_MODEM_WAKE_DELAY_MS 200 /* modem response after idle */
+
+enum phy_mdm6600_ctrl_lines {
+ PHY_MDM6600_ENABLE, /* USB PHY enable */
+ PHY_MDM6600_POWER, /* Device power */
+ PHY_MDM6600_RESET, /* Device reset */
+ PHY_MDM6600_NR_CTRL_LINES,
+};
+
+enum phy_mdm6600_bootmode_lines {
+ PHY_MDM6600_MODE0, /* out USB mode0 and OOB wake */
+ PHY_MDM6600_MODE1, /* out USB mode1, in OOB wake */
+ PHY_MDM6600_NR_MODE_LINES,
+};
+
+enum phy_mdm6600_cmd_lines {
+ PHY_MDM6600_CMD0,
+ PHY_MDM6600_CMD1,
+ PHY_MDM6600_CMD2,
+ PHY_MDM6600_NR_CMD_LINES,
+};
+
+enum phy_mdm6600_status_lines {
+ PHY_MDM6600_STATUS0,
+ PHY_MDM6600_STATUS1,
+ PHY_MDM6600_STATUS2,
+ PHY_MDM6600_NR_STATUS_LINES,
+};
+
+/*
+ * MDM6600 command codes. These are based on Motorola Mapphone Linux
+ * kernel tree.
+ */
+enum phy_mdm6600_cmd {
+ PHY_MDM6600_CMD_BP_PANIC_ACK,
+ PHY_MDM6600_CMD_DATA_ONLY_BYPASS, /* Reroute USB to CPCAP PHY */
+ PHY_MDM6600_CMD_FULL_BYPASS, /* Reroute USB to CPCAP PHY */
+ PHY_MDM6600_CMD_NO_BYPASS, /* Request normal USB mode */
+ PHY_MDM6600_CMD_BP_SHUTDOWN_REQ, /* Request device power off */
+ PHY_MDM6600_CMD_BP_UNKNOWN_5,
+ PHY_MDM6600_CMD_BP_UNKNOWN_6,
+ PHY_MDM6600_CMD_UNDEFINED,
+};
+
+/*
+ * MDM6600 status codes. These are based on Motorola Mapphone Linux
+ * kernel tree.
+ */
+enum phy_mdm6600_status {
+ PHY_MDM6600_STATUS_PANIC, /* Seems to be really off */
+ PHY_MDM6600_STATUS_PANIC_BUSY_WAIT,
+ PHY_MDM6600_STATUS_QC_DLOAD,
+ PHY_MDM6600_STATUS_RAM_DOWNLOADER, /* MDM6600 USB flashing mode */
+ PHY_MDM6600_STATUS_PHONE_CODE_AWAKE, /* MDM6600 normal USB mode */
+ PHY_MDM6600_STATUS_PHONE_CODE_ASLEEP,
+ PHY_MDM6600_STATUS_SHUTDOWN_ACK,
+ PHY_MDM6600_STATUS_UNDEFINED,
+};
+
+static const char * const
+phy_mdm6600_status_name[] = {
+ "off", "busy", "qc_dl", "ram_dl", "awake",
+ "asleep", "shutdown", "undefined",
+};
+
+struct phy_mdm6600 {
+ struct device *dev;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ struct gpio_desc *ctrl_gpios[PHY_MDM6600_NR_CTRL_LINES];
+ struct gpio_descs *mode_gpios;
+ struct gpio_descs *status_gpios;
+ struct gpio_descs *cmd_gpios;
+ struct delayed_work bootup_work;
+ struct delayed_work status_work;
+ struct delayed_work modem_wake_work;
+ struct completion ack;
+ bool enabled; /* mdm6600 phy enabled */
+ bool running; /* mdm6600 boot done */
+ bool awake; /* mdm6600 respnds on n_gsm */
+ int status;
+};
+
+static int phy_mdm6600_init(struct phy *x)
+{
+ struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+ struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+
+ if (!ddata->enabled)
+ return -EPROBE_DEFER;
+
+ gpiod_set_value_cansleep(enable_gpio, 0);
+
+ return 0;
+}
+
+static int phy_mdm6600_power_on(struct phy *x)
+{
+ struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+ struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+
+ if (!ddata->enabled)
+ return -ENODEV;
+
+ gpiod_set_value_cansleep(enable_gpio, 1);
+
+ return 0;
+}
+
+static int phy_mdm6600_power_off(struct phy *x)
+{
+ struct phy_mdm6600 *ddata = phy_get_drvdata(x);
+ struct gpio_desc *enable_gpio = ddata->ctrl_gpios[PHY_MDM6600_ENABLE];
+
+ if (!ddata->enabled)
+ return -ENODEV;
+
+ gpiod_set_value_cansleep(enable_gpio, 0);
+
+ return 0;
+}
+
+static const struct phy_ops gpio_usb_ops = {
+ .init = phy_mdm6600_init,
+ .power_on = phy_mdm6600_power_on,
+ .power_off = phy_mdm6600_power_off,
+ .owner = THIS_MODULE,
+};
+
+/**
+ * phy_mdm6600_cmd() - send a command request to mdm6600
+ * @ddata: device driver data
+ *
+ * Configures the three command request GPIOs to the specified value.
+ */
+static void phy_mdm6600_cmd(struct phy_mdm6600 *ddata, int val)
+{
+ int values[PHY_MDM6600_NR_CMD_LINES];
+ int i;
+
+ val &= (1 << PHY_MDM6600_NR_CMD_LINES) - 1;
+ for (i = 0; i < PHY_MDM6600_NR_CMD_LINES; i++)
+ values[i] = (val & BIT(i)) >> i;
+
+ gpiod_set_array_value_cansleep(PHY_MDM6600_NR_CMD_LINES,
+ ddata->cmd_gpios->desc, values);
+}
+
+/**
+ * phy_mdm6600_status() - read mdm6600 status lines
+ * @ddata: device driver data
+ */
+static void phy_mdm6600_status(struct work_struct *work)
+{
+ struct phy_mdm6600 *ddata;
+ struct device *dev;
+ int values[PHY_MDM6600_NR_STATUS_LINES];
+ int error, i, val = 0;
+
+ ddata = container_of(work, struct phy_mdm6600, status_work.work);
+ dev = ddata->dev;
+
+ error = gpiod_get_array_value_cansleep(PHY_MDM6600_NR_STATUS_LINES,
+ ddata->status_gpios->desc,
+ values);
+ if (error)
+ return;
+
+ for (i = 0; i < PHY_MDM6600_NR_STATUS_LINES; i++) {
+ val |= values[i] << i;
+ dev_dbg(ddata->dev, "XXX %s: i: %i values[i]: %i val: %i\n",
+ __func__, i, values[i], val);
+ }
+ ddata->status = val;
+
+ dev_info(dev, "modem status: %i %s\n",
+ ddata->status,
+ phy_mdm6600_status_name[ddata->status & 7]);
+ complete(&ddata->ack);
+}
+
+static irqreturn_t phy_mdm6600_irq_thread(int irq, void *data)
+{
+ struct phy_mdm6600 *ddata = data;
+
+ schedule_delayed_work(&ddata->status_work, msecs_to_jiffies(10));
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * phy_mdm6600_wakeirq_thread - handle mode1 line OOB wake after booting
+ * @irq: interrupt
+ * @data: interrupt handler data
+ *
+ * GPIO mode1 is used initially as output to configure the USB boot
+ * mode for mdm6600. After booting it is used as input for OOB wake
+ * signal from mdm6600 to the SoC. Just use it for debug info only
+ * for now.
+ */
+static irqreturn_t phy_mdm6600_wakeirq_thread(int irq, void *data)
+{
+ struct phy_mdm6600 *ddata = data;
+ struct gpio_desc *mode_gpio1;
+
+ mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
+ dev_dbg(ddata->dev, "OOB wake on mode_gpio1: %i\n",
+ gpiod_get_value(mode_gpio1));
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * phy_mdm6600_init_irq() - initialize mdm6600 status IRQ lines
+ * @ddata: device driver data
+ */
+static void phy_mdm6600_init_irq(struct phy_mdm6600 *ddata)
+{
+ struct device *dev = ddata->dev;
+ int i, error, irq;
+
+ for (i = PHY_MDM6600_STATUS0;
+ i <= PHY_MDM6600_STATUS2; i++) {
+ struct gpio_desc *gpio = ddata->status_gpios->desc[i];
+
+ irq = gpiod_to_irq(gpio);
+ if (irq <= 0)
+ continue;
+
+ error = devm_request_threaded_irq(dev, irq, NULL,
+ phy_mdm6600_irq_thread,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "mdm6600",
+ ddata);
+ if (error)
+ dev_warn(dev, "no modem status irq%i: %i\n",
+ irq, error);
+ }
+}
+
+struct phy_mdm6600_map {
+ const char *name;
+ int direction;
+};
+
+static const struct phy_mdm6600_map
+phy_mdm6600_ctrl_gpio_map[PHY_MDM6600_NR_CTRL_LINES] = {
+ { "enable", GPIOD_OUT_LOW, }, /* low = phy disabled */
+ { "power", GPIOD_OUT_LOW, }, /* low = off */
+ { "reset", GPIOD_OUT_HIGH, }, /* high = reset */
+};
+
+/**
+ * phy_mdm6600_init_lines() - initialize mdm6600 GPIO lines
+ * @ddata: device driver data
+ */
+static int phy_mdm6600_init_lines(struct phy_mdm6600 *ddata)
+{
+ struct device *dev = ddata->dev;
+ int i;
+
+ /* MDM6600 control lines */
+ for (i = 0; i < ARRAY_SIZE(phy_mdm6600_ctrl_gpio_map); i++) {
+ const struct phy_mdm6600_map *map =
+ &phy_mdm6600_ctrl_gpio_map[i];
+ struct gpio_desc **gpio = &ddata->ctrl_gpios[i];
+
+ *gpio = devm_gpiod_get(dev, map->name, map->direction);
+ if (IS_ERR(*gpio)) {
+ dev_info(dev, "gpio %s error %li\n",
+ map->name, PTR_ERR(*gpio));
+ return PTR_ERR(*gpio);
+ }
+ }
+
+ /* MDM6600 USB start-up mode output lines */
+ ddata->mode_gpios = devm_gpiod_get_array(dev, "motorola,mode",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ddata->mode_gpios))
+ return PTR_ERR(ddata->mode_gpios);
+
+ if (ddata->mode_gpios->ndescs != PHY_MDM6600_NR_MODE_LINES)
+ return -EINVAL;
+
+ /* MDM6600 status input lines */
+ ddata->status_gpios = devm_gpiod_get_array(dev, "motorola,status",
+ GPIOD_IN);
+ if (IS_ERR(ddata->status_gpios))
+ return PTR_ERR(ddata->status_gpios);
+
+ if (ddata->status_gpios->ndescs != PHY_MDM6600_NR_STATUS_LINES)
+ return -EINVAL;
+
+ /* MDM6600 cmd output lines */
+ ddata->cmd_gpios = devm_gpiod_get_array(dev, "motorola,cmd",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ddata->cmd_gpios))
+ return PTR_ERR(ddata->cmd_gpios);
+
+ if (ddata->cmd_gpios->ndescs != PHY_MDM6600_NR_CMD_LINES)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * phy_mdm6600_device_power_on() - power on mdm6600 device
+ * @ddata: device driver data
+ *
+ * To get the integrated USB phy in MDM6600 takes some hoops. We must ensure
+ * the shared USB bootmode GPIOs are configured, then request modem start-up,
+ * reset and power-up.. And then we need to recycle the shared USB bootmode
+ * GPIOs as they are also used for Out of Band (OOB) wake for the USB and
+ * TS 27.010 serial mux.
+ */
+static int phy_mdm6600_device_power_on(struct phy_mdm6600 *ddata)
+{
+ struct gpio_desc *mode_gpio0, *mode_gpio1, *reset_gpio, *power_gpio;
+ int error = 0, wakeirq;
+
+ mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
+ mode_gpio1 = ddata->mode_gpios->desc[PHY_MDM6600_MODE1];
+ reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
+ power_gpio = ddata->ctrl_gpios[PHY_MDM6600_POWER];
+
+ /*
+ * Shared GPIOs must be low for normal USB mode. After booting
+ * they are used for OOB wake signaling. These can be also used
+ * to configure USB flashing mode later on based on a module
+ * parameter.
+ */
+ gpiod_set_value_cansleep(mode_gpio0, 0);
+ gpiod_set_value_cansleep(mode_gpio1, 0);
+
+ /* Request start-up mode */
+ phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_NO_BYPASS);
+
+ /* Request a reset first */
+ gpiod_set_value_cansleep(reset_gpio, 0);
+ msleep(100);
+
+ /* Toggle power GPIO to request mdm6600 to start */
+ gpiod_set_value_cansleep(power_gpio, 1);
+ msleep(100);
+ gpiod_set_value_cansleep(power_gpio, 0);
+
+ /*
+ * Looks like the USB PHY needs between 2.2 to 4 seconds.
+ * If we try to use it before that, we will get L3 errors
+ * from omap-usb-host trying to access the PHY. See also
+ * phy_mdm6600_init() for -EPROBE_DEFER.
+ */
+ msleep(PHY_MDM6600_PHY_DELAY_MS);
+ ddata->enabled = true;
+
+ /* Booting up the rest of MDM6600 will take total about 8 seconds */
+ dev_info(ddata->dev, "Waiting for power up request to complete..\n");
+ if (wait_for_completion_timeout(&ddata->ack,
+ msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS))) {
+ if (ddata->status > PHY_MDM6600_STATUS_PANIC &&
+ ddata->status < PHY_MDM6600_STATUS_SHUTDOWN_ACK)
+ dev_info(ddata->dev, "Powered up OK\n");
+ } else {
+ ddata->enabled = false;
+ error = -ETIMEDOUT;
+ dev_err(ddata->dev, "Timed out powering up\n");
+ }
+
+ /* Reconfigure mode1 GPIO as input for OOB wake */
+ gpiod_direction_input(mode_gpio1);
+
+ wakeirq = gpiod_to_irq(mode_gpio1);
+ if (wakeirq <= 0)
+ return wakeirq;
+
+ error = devm_request_threaded_irq(ddata->dev, wakeirq, NULL,
+ phy_mdm6600_wakeirq_thread,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "mdm6600-wake",
+ ddata);
+ if (error)
+ dev_warn(ddata->dev, "no modem wakeirq irq%i: %i\n",
+ wakeirq, error);
+
+ ddata->running = true;
+
+ return error;
+}
+
+/**
+ * phy_mdm6600_device_power_off() - power off mdm6600 device
+ * @ddata: device driver data
+ */
+static void phy_mdm6600_device_power_off(struct phy_mdm6600 *ddata)
+{
+ struct gpio_desc *reset_gpio =
+ ddata->ctrl_gpios[PHY_MDM6600_RESET];
+
+ ddata->enabled = false;
+ phy_mdm6600_cmd(ddata, PHY_MDM6600_CMD_BP_SHUTDOWN_REQ);
+ msleep(100);
+
+ gpiod_set_value_cansleep(reset_gpio, 1);
+
+ dev_info(ddata->dev, "Waiting for power down request to complete.. ");
+ if (wait_for_completion_timeout(&ddata->ack,
+ msecs_to_jiffies(5000))) {
+ if (ddata->status == PHY_MDM6600_STATUS_PANIC)
+ dev_info(ddata->dev, "Powered down OK\n");
+ } else {
+ dev_err(ddata->dev, "Timed out powering down\n");
+ }
+}
+
+static void phy_mdm6600_deferred_power_on(struct work_struct *work)
+{
+ struct phy_mdm6600 *ddata;
+ int error;
+
+ ddata = container_of(work, struct phy_mdm6600, bootup_work.work);
+
+ error = phy_mdm6600_device_power_on(ddata);
+ if (error)
+ dev_err(ddata->dev, "Device not functional\n");
+}
+
+/*
+ * USB suspend puts mdm6600 into low power mode. For any n_gsm using apps,
+ * we need to keep the modem awake by kicking it's mode0 GPIO. This will
+ * keep the modem awake for about 1.2 seconds. When no n_gsm apps are using
+ * the modem, runtime PM auto mode can be enabled so modem can enter low
+ * power mode.
+ */
+static void phy_mdm6600_wake_modem(struct phy_mdm6600 *ddata)
+{
+ struct gpio_desc *mode_gpio0;
+
+ mode_gpio0 = ddata->mode_gpios->desc[PHY_MDM6600_MODE0];
+ gpiod_set_value_cansleep(mode_gpio0, 1);
+ usleep_range(5, 15);
+ gpiod_set_value_cansleep(mode_gpio0, 0);
+ if (ddata->awake)
+ usleep_range(5, 15);
+ else
+ msleep(MDM6600_MODEM_WAKE_DELAY_MS);
+}
+
+static void phy_mdm6600_modem_wake(struct work_struct *work)
+{
+ struct phy_mdm6600 *ddata;
+
+ ddata = container_of(work, struct phy_mdm6600, modem_wake_work.work);
+ phy_mdm6600_wake_modem(ddata);
+ schedule_delayed_work(&ddata->modem_wake_work,
+ msecs_to_jiffies(MDM6600_MODEM_IDLE_DELAY_MS));
+}
+
+static int __maybe_unused phy_mdm6600_runtime_suspend(struct device *dev)
+{
+ struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
+
+ cancel_delayed_work_sync(&ddata->modem_wake_work);
+ ddata->awake = false;
+
+ return 0;
+}
+
+static int __maybe_unused phy_mdm6600_runtime_resume(struct device *dev)
+{
+ struct phy_mdm6600 *ddata = dev_get_drvdata(dev);
+
+ phy_mdm6600_modem_wake(&ddata->modem_wake_work.work);
+ ddata->awake = true;
+
+ return 0;
+}
+
+static const struct dev_pm_ops phy_mdm6600_pm_ops = {
+ SET_RUNTIME_PM_OPS(phy_mdm6600_runtime_suspend,
+ phy_mdm6600_runtime_resume, NULL)
+};
+
+static const struct of_device_id phy_mdm6600_id_table[] = {
+ { .compatible = "motorola,mapphone-mdm6600", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, phy_mdm6600_id_table);
+
+static int phy_mdm6600_probe(struct platform_device *pdev)
+{
+ struct phy_mdm6600 *ddata;
+ int error;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&ddata->bootup_work,
+ phy_mdm6600_deferred_power_on);
+ INIT_DELAYED_WORK(&ddata->status_work, phy_mdm6600_status);
+ INIT_DELAYED_WORK(&ddata->modem_wake_work, phy_mdm6600_modem_wake);
+ init_completion(&ddata->ack);
+
+ ddata->dev = &pdev->dev;
+ platform_set_drvdata(pdev, ddata);
+
+ error = phy_mdm6600_init_lines(ddata);
+ if (error)
+ return error;
+
+ phy_mdm6600_init_irq(ddata);
+
+ ddata->generic_phy = devm_phy_create(ddata->dev, NULL, &gpio_usb_ops);
+ if (IS_ERR(ddata->generic_phy)) {
+ error = PTR_ERR(ddata->generic_phy);
+ goto cleanup;
+ }
+
+ phy_set_drvdata(ddata->generic_phy, ddata);
+
+ ddata->phy_provider =
+ devm_of_phy_provider_register(ddata->dev,
+ of_phy_simple_xlate);
+ if (IS_ERR(ddata->phy_provider)) {
+ error = PTR_ERR(ddata->phy_provider);
+ goto cleanup;
+ }
+
+ schedule_delayed_work(&ddata->bootup_work, 0);
+
+ /*
+ * See phy_mdm6600_device_power_on(). We should be able
+ * to remove this eventually when ohci-platform can deal
+ * with -EPROBE_DEFER.
+ */
+ msleep(PHY_MDM6600_PHY_DELAY_MS + 500);
+
+ /*
+ * Enable PM runtime only after PHY has been powered up properly.
+ * It is currently only needed after USB suspends mdm6600 and n_gsm
+ * needs to access the device. We don't want to do this earlier as
+ * gpio mode0 pin doubles as mdm6600 wake-up gpio.
+ */
+ pm_runtime_use_autosuspend(ddata->dev);
+ pm_runtime_set_autosuspend_delay(ddata->dev,
+ MDM6600_MODEM_IDLE_DELAY_MS);
+ pm_runtime_enable(ddata->dev);
+ error = pm_runtime_get_sync(ddata->dev);
+ if (error < 0) {
+ dev_warn(ddata->dev, "failed to wake modem: %i\n", error);
+ pm_runtime_put_noidle(ddata->dev);
+ }
+ pm_runtime_mark_last_busy(ddata->dev);
+ pm_runtime_put_autosuspend(ddata->dev);
+
+ return 0;
+
+cleanup:
+ phy_mdm6600_device_power_off(ddata);
+ return error;
+}
+
+static int phy_mdm6600_remove(struct platform_device *pdev)
+{
+ struct phy_mdm6600 *ddata = platform_get_drvdata(pdev);
+ struct gpio_desc *reset_gpio = ddata->ctrl_gpios[PHY_MDM6600_RESET];
+
+ pm_runtime_dont_use_autosuspend(ddata->dev);
+ pm_runtime_put_sync(ddata->dev);
+ pm_runtime_disable(ddata->dev);
+
+ if (!ddata->running)
+ wait_for_completion_timeout(&ddata->ack,
+ msecs_to_jiffies(PHY_MDM6600_ENABLED_DELAY_MS));
+
+ gpiod_set_value_cansleep(reset_gpio, 1);
+ phy_mdm6600_device_power_off(ddata);
+
+ cancel_delayed_work_sync(&ddata->modem_wake_work);
+ cancel_delayed_work_sync(&ddata->bootup_work);
+ cancel_delayed_work_sync(&ddata->status_work);
+
+ return 0;
+}
+
+static struct platform_driver phy_mdm6600_driver = {
+ .probe = phy_mdm6600_probe,
+ .remove = phy_mdm6600_remove,
+ .driver = {
+ .name = "phy-mapphone-mdm6600",
+ .pm = &phy_mdm6600_pm_ops,
+ .of_match_table = of_match_ptr(phy_mdm6600_id_table),
+ },
+};
+
+module_platform_driver(phy_mdm6600_driver);
+
+MODULE_ALIAS("platform:gpio_usb");
+MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
+MODULE_DESCRIPTION("mdm6600 gpio usb phy driver");
+MODULE_LICENSE("GPL v2");