Sorry, please ignore this version, it has build issue, just resent the patch series.
Anson.
> Subject: [PATCH V5 1/5] dt-bindings: fsl: scu: add scu key binding
>
> NXP i.MX8QXP is an ARMv8 SoC with a Cortex-M4 core inside as system
> controller, the system controller is in charge of system power, clock and scu
> key event etc. management, Linux kernel has to communicate with system
> controller via MU (message unit) IPC to get scu key event, add binding doc for
> i.MX system controller key driver.
>
> Signed-off-by: Anson Huang <[email protected]>
> ---
> No changes.
> ---
> .../devicetree/bindings/arm/freescale/fsl,scu.txt | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> index c149fad..5eab7d0 100644
> --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> @@ -157,6 +157,15 @@ Required properties:
> Optional properties:
> - timeout-sec: contains the watchdog timeout in seconds.
>
> +SCU key bindings based on SCU Message Protocol
> +------------------------------------------------------------
> +
> +Required properties:
> +- compatible: should be:
> + "fsl,imx8qxp-sc-key"
> + followed by "fsl,imx-sc-key";
> +- linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt
> +
> Example (imx8qxp):
> -------------
> aliases {
> @@ -220,6 +229,11 @@ firmware {
> compatible = "fsl,imx8qxp-sc-rtc";
> };
>
> + scu_key: scu-key {
> + compatible = "fsl,imx8qxp-sc-key", "fsl,imx-sc-key";
> + linux,keycode = <KEY_POWER>;
> + };
> +
> watchdog {
> compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
> timeout-sec = <60>;
> --
> 2.7.4