On Fri, Aug 30, 2019 at 04:53:45PM -0400, Anson Huang wrote:
> 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 power key event etc. management, Linux kernel
> has to communicate with system controller via MU (message unit)
> IPC to get power key event, add binding doc for i.MX system
> controller power key driver.
>
> Signed-off-by: Anson Huang <anson.hu...@nxp.com>
> ---
> .../devicetree/bindings/arm/freescale/fsl,scu.txt | 18
> ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> index c149fad..001d0b7 100644
> --- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
> @@ -157,6 +157,17 @@ Required properties:
> Optional properties:
> - timeout-sec: contains the watchdog timeout in seconds.
>
> +Power key bindings based on SCU Message Protocol
> +------------------------------------------------------------
> +
> +Required properties:
> +- compatible: should be:
> + "fsl,imx8qxp-sc-pwrkey"
> + followed by "fsl,imx-sc-pwrkey";
> +- linux,keycodes: See Documentation/devicetree/bindings/input/keys.txt
> +Optional Properties:
> +- wakeup-source: See
> Documentation/devicetree/bindings/power/wakeup-source.txt
> +
> Example (imx8qxp):
> -------------
> aliases {
> @@ -220,6 +231,13 @@ firmware {
> compatible = "fsl,imx8qxp-sc-rtc";
> };
>
> + scu_pwrkey: scu-pwrkey {
> + compatible = "fsl,imx8qxp-sc-pwrkey",
> "fsl,imx-sc-pwrkey";
> + linux,keycode = <KEY_POWER>;
> + wakeup-source;
wakeup-source implies an interrupt property.
> + status = "disabled";
Don't should status in examples.
> + };
> +
> watchdog {
> compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
> timeout-sec = <60>;
> --
> 2.7.4
>
