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Commit e8b58b49 authored by Dongjin Kim's avatar Dongjin Kim Committed by Greg Kroah-Hartman
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usb: misc: usb3503: Adding device tree entry 'disabled-ports' 



This patch is to add a property 'disabled-ports' representing the unused port
of USB3503. USB3503 can support up to 3 USB host port and each ports can be
controlled to be enabled or disabled. Do not describe this property if all
ports must be enabled.

You can represent the ports to disable in the device tree.

	usb3503@08{
		...
		disabled-ports = <2 3>;
		...
	};

Signed-off-by: default avatarDongjin Kim <tobetter@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e8e44a48

Documentation/devicetree/bindings/usb/usb3503.txt

+5 −0
Original line number Diff line number Diff line
@@ -4,6 +4,10 @@ Required properties: 
- compatible: Should be "smsc,usb3503".

- reg: Specifies the i2c slave address, it should be 0x08.

- connect-gpios: Should specify GPIO for connect.

- disabled-ports: Should specify the ports unused.

	'1' or '2' or '3' are availe for this property to describe the port

	number. 1~3 property values are possible to be desribed.

	Do not describe this property if all ports have to be enabled.

- intn-gpios: Should specify GPIO for interrupt.

- reset-gpios: Should specify GPIO for reset.

- initial-mode: Should specify initial mode.
@@ -14,6 +18,7 @@ Examples: 
		compatible = "smsc,usb3503";

		reg = <0x08>;

		connect-gpios = <&gpx3 0 1>;

		disabled-ports = <2 3>;

		intn-gpios = <&gpx3 4 1>;

		reset-gpios = <&gpx3 5 1>;

		initial-mode = <1>;

drivers/usb/misc/usb3503.c

+14 −0
Original line number Diff line number Diff line
@@ -186,6 +186,8 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 
	struct usb3503 *hub;

	int err = -ENOMEM;

	u32 mode = USB3503_MODE_UNKNOWN;

	const u32 *property;

	int len;



	hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);

	if (!hub) {
@@ -203,6 +205,18 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id) 
		hub->gpio_reset		= pdata->gpio_reset;

		hub->mode		= pdata->initial_mode;

	} else if (np) {

		hub->port_off_mask = 0;



		property = of_get_property(np, "disabled-ports", &len);

		if (property && (len / sizeof(u32)) > 0) {

			int i;

			for (i = 0; i < len / sizeof(u32); i++) {

				u32 port = be32_to_cpu(property[i]);

				if ((1 <= port) && (port <= 3))

					hub->port_off_mask |= (1 << port);

			}

		}



		hub->gpio_intn	= of_get_named_gpio(np, "connect-gpios", 0);

		if (hub->gpio_intn == -EPROBE_DEFER)

			return -EPROBE_DEFER;