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Commit 918d98db authored by Marc Zyngier's avatar Marc Zyngier Committed by Jason Cooper
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DT: omap4/5: add binding for the wake-up generator 



Add a binding for the OMAP4/5 wake-up generator, which acts as
an interrupt controller feeding into the GIC.

Acked-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Link: https://lkml.kernel.org/r/1426088629-15377-7-git-send-email-marc.zyngier@arm.com


Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
parent 994dd8a3

Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu

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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@48281000 {

               compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";

               interrupt-controller;

               #interrupt-cells = <3>;

               reg = <0x48281000 0x1000>;

               interrupt-parent = <&gic>;

       };