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usb: misc: usb3503: Adding device tree entry 'disabled-ports'

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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: Dongjin Kim <tobetter@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dongjin Kim 2013-05-22 05:20:09 +09:00 committed by Greg Kroah-Hartman
parent e8e44a4896
commit e8b58b4913
2 changed files with 19 additions and 0 deletions
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5
Documentation/devicetree/bindings/usb/usb3503.txt
View file

@ -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>;

14
drivers/usb/misc/usb3503.c
View file

@ -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;