[PATCH v4 12/21] DT: omap4/5: add binding for the wake-up generator

[tony@atomide.com (Tony Lindgren)]

* Marc Zyngier <marc.zyngier@arm.com> [150119 01:48]:
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

Acked-by: Tony Lindgren <tony@atomide.com>

> ---
>  .../interrupt-controller/ti,omap4-wugen-mpu        | 33 ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
> 
> diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu b/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
> new file mode 100644
> index 0000000..43effa0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
> @@ -0,0 +1,33 @@
> +TI OMAP4 Wake-up Generator
> +
> +All TI OMAP4/5 (and their derivatives) an interrupt controller that
> +routes interrupts to the GIC, and also serves as a wakeup source. It
> +is also referred to as "WUGEN-MPU", hence the name of the binding.
> +
> +Reguired properties:
> +
> +- compatible : should contain at least "ti,omap4-wugen-mpu" or
> +  "ti,omap5-wugen-mpu"
> +- reg : Specifies base physical address and size of the registers.
> +- interrupt-controller : Identifies the node as an interrupt controller.
> +- #interrupt-cells : Specifies the number of cells needed to encode an
> +  interrupt source. The value must be 3.
> +- interrupt-parent : a phandle to the GIC these interrupts are routed
> +  to.
> +
> +Notes:
> +
> +- Because this HW ultimately routes interrupts to the GIC, the
> +  interrupt specifier must be that of the GIC.
> +- Only SPIs can use the WUGEN as an interrupt parent. SGIs and PPIs
> +  are explicitly forbiden.
> +
> +Example:
> +
> +       wakeupgen: interrupt-controller at 48281000 {
> +               compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";
> +               interrupt-controller;
> +               #interrupt-cells = <3>;
> +               reg = <0x48281000 0x1000>;
> +               interrupt-parent = <&gic>;
> +       };
> -- 
> 2.1.4
>