From e52817faae359ce95c93c2b6eb88b16d4b430181 Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Mon, 2 Feb 2015 12:21:59 +0200 Subject: extcon: usb-gpio: Introduce gpio usb extcon driver This driver observes the USB ID pin connected over a GPIO and updates the USB cable extcon states accordingly. The existing GPIO extcon driver is not suitable for this purpose as it needs to be taught to understand USB cable states and it can't handle more than one cable per instance. For the USB case we need to handle 2 cable states. 1) USB (attach/detach) 2) USB-HOST (attach/detach) This driver can be easily updated in the future to handle VBUS events in case it happens to be available on GPIO for any platform. Signed-off-by: Roger Quadros Reviewed-by: Felipe Balbi Acked-by: Felipe Balbi Signed-off-by: Chanwoo Choi --- .../devicetree/bindings/extcon/extcon-usb-gpio.txt | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt (limited to 'Documentation/devicetree/bindings/extcon') diff --git a/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt new file mode 100644 index 000000000000..af0b903de293 --- /dev/null +++ b/Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt @@ -0,0 +1,18 @@ +USB GPIO Extcon device + +This is a virtual device used to generate USB cable states from the USB ID pin +connected to a GPIO pin. + +Required properties: +- compatible: Should be "linux,extcon-usb-gpio" +- id-gpio: gpio for USB ID pin. See gpio binding. + +Example: Examples of extcon-usb-gpio node in dra7-evm.dts as listed below: + extcon_usb1 { + compatible = "linux,extcon-usb-gpio"; + id-gpio = <&gpio6 1 GPIO_ACTIVE_HIGH>; + } + + &omap_dwc3_1 { + extcon = <&extcon_usb1>; + }; -- cgit v1.2.3