Hi Roger,
Looks good to me. Applied it on v3.21 queue.
Thanks,
Chanwoo Choi
On 02/02/2015 07:21 PM, Roger Quadros wrote:
> 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 <rogerq@xxxxxx>
> ---
> v4:
> - got rid of id_irqwake flag. Fail if enable/disable_irq_wake() fails
> - changed host cable name to "USB-HOST"
> - use 'depends on' instead of 'select' GPIOLIB
>
> .../devicetree/bindings/extcon/extcon-usb-gpio.txt | 18 ++
> drivers/extcon/Kconfig | 7 +
> drivers/extcon/Makefile | 1 +
> drivers/extcon/extcon-usb-gpio.c | 237 +++++++++++++++++++++
> 4 files changed, 263 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/extcon/extcon-usb-gpio.txt
> create mode 100644 drivers/extcon/extcon-usb-gpio.c
>
> 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 0000000..85fe6b0
> --- /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:
I add some description for example as following:
+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>;
> + };
[snip]
Thanks,
Chanwoo Choi
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