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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>
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2 changed files with 46 additions and 5 deletions
20
Documentation/devicetree/bindings/usb/usb3503.txt
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20
Documentation/devicetree/bindings/usb/usb3503.txt
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@ -0,0 +1,20 @@
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SMSC USB3503 High-Speed Hub Controller
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Required properties:
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- compatible: Should be "smsc,usb3503".
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- reg: Specifies the i2c slave address, it should be 0x08.
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- connect-gpios: Should specify GPIO for connect.
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- intn-gpios: Should specify GPIO for interrupt.
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- reset-gpios: Should specify GPIO for reset.
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- initial-mode: Should specify initial mode.
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(1 for HUB mode, 2 for STANDBY mode)
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Examples:
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usb3503@08 {
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compatible = "smsc,usb3503";
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reg = <0x08>;
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connect-gpios = <&gpx3 0 1>;
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intn-gpios = <&gpx3 4 1>;
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reset-gpios = <&gpx3 5 1>;
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initial-mode = <1>;
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};
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@ -23,6 +23,7 @@
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_device.h>
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#include <linux/platform_data/usb3503.h>
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@ -181,8 +182,10 @@ static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode)
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static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
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{
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struct usb3503_platform_data *pdata = i2c->dev.platform_data;
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struct device_node *np = i2c->dev.of_node;
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struct usb3503 *hub;
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int err = -ENOMEM;
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u32 mode;
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hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);
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if (!hub) {
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@ -193,14 +196,23 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
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i2c_set_clientdata(i2c, hub);
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hub->client = i2c;
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if (!pdata) {
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dev_dbg(&i2c->dev, "missing platform data\n");
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goto err_out;
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} else {
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if (pdata) {
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hub->gpio_intn = pdata->gpio_intn;
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hub->gpio_connect = pdata->gpio_connect;
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hub->gpio_reset = pdata->gpio_reset;
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hub->mode = pdata->initial_mode;
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} else if (np) {
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hub->gpio_intn = of_get_named_gpio(np, "connect-gpios", 0);
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if (hub->gpio_intn == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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hub->gpio_connect = of_get_named_gpio(np, "intn-gpios", 0);
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if (hub->gpio_connect == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
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if (hub->gpio_reset == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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of_property_read_u32(np, "initial-mode", &mode);
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hub->mode = mode;
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}
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if (gpio_is_valid(hub->gpio_intn)) {
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@ -236,7 +248,7 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
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}
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}
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usb3503_switch_mode(hub, pdata->initial_mode);
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usb3503_switch_mode(hub, hub->mode);
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dev_info(&i2c->dev, "%s: probed on %s mode\n", __func__,
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(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");
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@ -277,9 +289,18 @@ static const struct i2c_device_id usb3503_id[] = {
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};
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MODULE_DEVICE_TABLE(i2c, usb3503_id);
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#ifdef CONFIG_OF
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static const struct of_device_id usb3503_of_match[] = {
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{ .compatible = "smsc,usb3503", },
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{},
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};
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MODULE_DEVICE_TABLE(of, usb3503_of_match);
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#endif
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static struct i2c_driver usb3503_driver = {
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.driver = {
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.name = USB3503_I2C_NAME,
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.of_match_table = of_match_ptr(usb3503_of_match),
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},
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.probe = usb3503_probe,
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.remove = usb3503_remove,
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