Added device tree support for usb3503 driver and add new document with device tree binding information.
Signed-off-by: Dongjin Kim <tobetter@xxxxxxxxx>
---
Documentation/devicetree/bindings/usb/usb3503.txt | 20 +++++++++++++
drivers/usb/misc/usb3503.c | 31 +++++++++++++++++----
2 files changed, 46 insertions(+), 5 deletions(-)
create mode 100644 Documentation/devicetree/bindings/usb/usb3503.txt
diff --git a/Documentation/devicetree/bindings/usb/usb3503.txt b/Documentation/devicetree/bindings/usb/usb3503.txt
new file mode 100644
index 0000000..6813a71
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usb3503.txt
@@ -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>;
+ };
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 @@ 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,
--
1.7.10.4
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