Subject: Re: [PATCH 1/5] dt-bindings: fsl: scu: add scu power key binding

From: Rob Herring <[email-masked]>
Date: Mon, 02 Sep 2019 14:39:14 +0100

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 <[email-masked]>
> ---
>  .../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
> 

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