mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 11:49:32 +00:00
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: Dongjin Kim <tobetter@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
9bc5d12620
commit
eab8050c01
2 changed files with 46 additions and 5 deletions
20
Documentation/devicetree/bindings/usb/usb3503.txt
Normal file
20
Documentation/devicetree/bindings/usb/usb3503.txt
Normal 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>;
|
||||||
|
};
|
|
@ -23,6 +23,7 @@
|
||||||
#include <linux/delay.h>
|
#include <linux/delay.h>
|
||||||
#include <linux/slab.h>
|
#include <linux/slab.h>
|
||||||
#include <linux/module.h>
|
#include <linux/module.h>
|
||||||
|
#include <linux/of_gpio.h>
|
||||||
#include <linux/platform_device.h>
|
#include <linux/platform_device.h>
|
||||||
#include <linux/platform_data/usb3503.h>
|
#include <linux/platform_data/usb3503.h>
|
||||||
|
|
||||||
|
@ -181,8 +182,10 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode)
|
||||||
static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
|
static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
|
||||||
{
|
{
|
||||||
struct usb3503_platform_data *pdata = i2c->dev.platform_data;
|
struct usb3503_platform_data *pdata = i2c->dev.platform_data;
|
||||||
|
struct device_node *np = i2c->dev.of_node;
|
||||||
struct usb3503 *hub;
|
struct usb3503 *hub;
|
||||||
int err = -ENOMEM;
|
int err = -ENOMEM;
|
||||||
|
u32 mode;
|
||||||
|
|
||||||
hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);
|
hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);
|
||||||
if (!hub) {
|
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);
|
i2c_set_clientdata(i2c, hub);
|
||||||
hub->client = i2c;
|
hub->client = i2c;
|
||||||
|
|
||||||
if (!pdata) {
|
if (pdata) {
|
||||||
dev_dbg(&i2c->dev, "missing platform data\n");
|
|
||||||
goto err_out;
|
|
||||||
} else {
|
|
||||||
hub->gpio_intn = pdata->gpio_intn;
|
hub->gpio_intn = pdata->gpio_intn;
|
||||||
hub->gpio_connect = pdata->gpio_connect;
|
hub->gpio_connect = pdata->gpio_connect;
|
||||||
hub->gpio_reset = pdata->gpio_reset;
|
hub->gpio_reset = pdata->gpio_reset;
|
||||||
hub->mode = pdata->initial_mode;
|
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)) {
|
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__,
|
dev_info(&i2c->dev, "%s: probed on %s mode\n", __func__,
|
||||||
(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");
|
(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);
|
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 = {
|
static struct i2c_driver usb3503_driver = {
|
||||||
.driver = {
|
.driver = {
|
||||||
.name = USB3503_I2C_NAME,
|
.name = USB3503_I2C_NAME,
|
||||||
|
.of_match_table = of_match_ptr(usb3503_of_match),
|
||||||
},
|
},
|
||||||
.probe = usb3503_probe,
|
.probe = usb3503_probe,
|
||||||
.remove = usb3503_remove,
|
.remove = usb3503_remove,
|
||||||
|
|
Loading…
Reference in a new issue