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USB: misc: usb3503: add dt support

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

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dongjin Kim 2013-01-24 02:47:10 +09:00 committed by Greg Kroah-Hartman
parent 9bc5d12620
commit eab8050c01
2 changed files with 46 additions and 5 deletions
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20
Documentation/devicetree/bindings/usb/usb3503.txt Normal file
View File

@ -0,0 +1,20 @@
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>;
};

31
drivers/usb/misc/usb3503.c
View File

@ -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,