On Wed, Dec 17, 2014 at 6:10 AM, Y Vo <yvo@xxxxxxx> wrote:
> Documentation for APM X-Gene standby GPIO controller DTS binding.
>
> Signed-off-by: Y Vo <yvo@xxxxxxx>
> ---
> .../devicetree/bindings/gpio/gpio-xgene-sb.txt | 31 ++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
> new file mode 100644
> index 0000000..3215e4d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
> @@ -0,0 +1,31 @@
> +APM X-Gene Standby GPIO controller bindings
> +
> +This is a gpio controller in standby domain.
> +
> +There are 20 GPIO pins from 0..21. There is no GPIO_DS14 and GPIO_DS15.
> +Only GPIO_DS8..GPIO_DS13 support interrupt. IRQ mapping 0x28..0x2d.
> +
> +Required properties:
> +- compatible: "apm,xgene-gpio-sb" for X-Gene Standby GPIO controller
> +- reg: Physical base address and size of the controller's registers
> +- #gpio-cells: Should be two.
> + - first cell is the pin number
> + - second cell is used to specify the gpio polarity:
> + 0 = active high
> + 1 = active low
> +- gpio-controller: Marks the device node as a GPIO controller.
> +- interrupts: Shall contains the interrupts.
>From the example it seems it must contain exactly 6 interrupts?
Then state this.
> +Example:
> + sbgpio: sbgpio@17001000 {
> + compatible = "apm,xgene-gpio-sb";
> + reg = <0x0 0x17001000 0x0 0x400>;
> + #gpio-cells = <2>;
> + gpio-controller;
> + interrupts = <0x0 0x28 0x1>,
> + <0x0 0x29 0x1>,
> + <0x0 0x2a 0x1>,
> + <0x0 0x2b 0x1>,
> + <0x0 0x2c 0x1>,
> + <0x0 0x2d 0x1>;
> + };
Yours,
Linus Walleij
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