linux-kernel - RE: [PATCH 1/5] dt-bindings: fsl: scu: add scu power key binding

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Message-ID: <DB3PR0402MB3916135233AA2DDD5DA177B8F5B90@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Tue, 3 Sep 2019 02:05:33 +0000
From:   Anson Huang <anson.huang@....com>
To:     Rob Herring <robh@...nel.org>
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Subject: RE: [PATCH 1/5] dt-bindings: fsl: scu: add scu power key binding

Hi, Rob

> 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.Huang@....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.

After further check, I confirm this "wakeup-source" property is NOT needed for SCU general interrupt
wakeup, remove it in V2. 

> 
> > +			status = "disabled";
> 
> Don't should status in examples.

Removed it in V2, please help review, thanks.

Anson