Hi Haojian Zhuang,
On Tue, Apr 22, 2014 at 09:35:42AM +0800, Haojian Zhuang wrote:
> If gpio base number isn't specified, the gpio base will be find from
> the end of gpio number. In order to keep with schematics, use alias
> to get the ID of gpio chip.
>
> Signed-off-by: Haojian Zhuang <haojian.zhuang@xxxxxxxxxx>
> ---
> .../devicetree/bindings/gpio/gpio-pl061.txt | 31 ++++++++++++++++++++++
Binding documentation should be done in a separate patch.
> drivers/gpio/gpio-pl061.c | 14 +++++++++-
> 2 files changed, 44 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/gpio/gpio-pl061.txt
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-pl061.txt b/Documentation/devicetree/bindings/gpio/gpio-pl061.txt
> new file mode 100644
> index 0000000..164b5ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/gpio-pl061.txt
> @@ -0,0 +1,31 @@
> +PL061 GPIO controller bindings
> +
> +Required properties:
> +- compatible:
> + - "arm,pl061", "arm,primecell".
> +- #gpio-cells : Should be two.
> + - first cell is the gpio 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.
> +- interrupt-controller : Marks the device node as an interrupt controller.
> +- #interrupt-cells : Should be two.
> + - first cell is the hw irq number
> + - second cell is used to specify the interrupt type:
> + 0 = default, unspecified type
> + 1 = rising edge triggered
> + 2 = falling edge triggered
> + 4 = high level triggered
> + 8 = low level triggered
> +
> +Example:
> + gpio0: gpio@fc806000 {
> + compatible = "arm,pl061", "arm,primecell";
> + reg = <0xfc806000 0x1000>;
> + interrupts = <0 64 0x4>;
The "interrupts" property should be mentioned above.
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + };
baruch
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