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>
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index dc2c993..471218a 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -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 @@
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 @@
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 @@
}
}
- 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 @@
};
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,