Commit eab8050c authored by Dongjin Kim's avatar Dongjin Kim Committed by Greg Kroah-Hartman
Browse files

USB: misc: usb3503: add dt support 



Added device tree support for usb3503 driver and add new document with device tree binding information.

Signed-off-by: default avatarDongjin Kim <tobetter@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9bc5d126

Documentation/devicetree/bindings/usb/usb3503.txt

0 → 100644
+20 −0
Original line number Diff line number Diff line 
SMSC USB3503 High-Speed Hub Controller



Required properties:

- compatible: Should be "smsc,usb3503".

- reg: Specifies the i2c slave address, it should be 0x08.

- connect-gpios: Should specify GPIO for connect.

- intn-gpios: Should specify GPIO for interrupt.

- reset-gpios: Should specify GPIO for reset.

- initial-mode: Should specify initial mode.

                (1 for HUB mode, 2 for STANDBY mode)



Examples:

	usb3503@08 {

		compatible = "smsc,usb3503";

		reg = <0x08>;

		connect-gpios = <&gpx3 0 1>;

		intn-gpios = <&gpx3 4 1>;

		reset-gpios = <&gpx3 5 1>;

		initial-mode = <1>;

	};

drivers/usb/misc/usb3503.c

+26 −5
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/of_gpio.h>

#include <linux/platform_device.h>

#include <linux/platform_data/usb3503.h>
@@ -181,8 +182,10 @@ err_hubmode: 
static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)

{

	struct usb3503_platform_data *pdata = i2c->dev.platform_data;

	struct device_node *np = i2c->dev.of_node;

	struct usb3503 *hub;

	int err = -ENOMEM;

	u32 mode;



	hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);

	if (!hub) {
@@ -193,14 +196,23 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 
	i2c_set_clientdata(i2c, hub);

	hub->client = i2c;



	if (!pdata) {

		dev_dbg(&i2c->dev, "missing platform data\n");

		goto err_out;

	} else {

	if (pdata) {

		hub->gpio_intn		= pdata->gpio_intn;

		hub->gpio_connect	= pdata->gpio_connect;

		hub->gpio_reset		= pdata->gpio_reset;

		hub->mode		= pdata->initial_mode;

	} else if (np) {

		hub->gpio_intn	= of_get_named_gpio(np, "connect-gpios", 0);

		if (hub->gpio_intn == -EPROBE_DEFER)

			return -EPROBE_DEFER;

		hub->gpio_connect = of_get_named_gpio(np, "intn-gpios", 0);

		if (hub->gpio_connect == -EPROBE_DEFER)

			return -EPROBE_DEFER;

		hub->gpio_reset	= of_get_named_gpio(np, "reset-gpios", 0);

		if (hub->gpio_reset == -EPROBE_DEFER)

			return -EPROBE_DEFER;

		of_property_read_u32(np, "initial-mode", &mode);

		hub->mode = mode;

	}



	if (gpio_is_valid(hub->gpio_intn)) {
@@ -236,7 +248,7 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 
		}

	}



	usb3503_switch_mode(hub, pdata->initial_mode);

	usb3503_switch_mode(hub, hub->mode);



	dev_info(&i2c->dev, "%s: probed on  %s mode\n", __func__,

			(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");
@@ -277,9 +289,18 @@ static const struct i2c_device_id usb3503_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, usb3503_id);



#ifdef CONFIG_OF

static const struct of_device_id usb3503_of_match[] = {

	{ .compatible = "smsc,usb3503", },

	{},

};

MODULE_DEVICE_TABLE(of, usb3503_of_match);

#endif



static struct i2c_driver usb3503_driver = {

	.driver = {

		.name = USB3503_I2C_NAME,

		.of_match_table = of_match_ptr(usb3503_of_match),

	},

	.probe		= usb3503_probe,

	.remove		= usb3503_remove,

CRA Git | Maintained and supported by SUSTech CRA and CCSE