linux-kernel - RE: [PATCH V2 1/5] dt-bindings: fsl: scu: add scu power key binding

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Message-ID: <DB3PR0402MB391673C02411B57F815DE609F5850@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Mon, 23 Sep 2019 02:31:56 +0000
From:   Anson Huang <anson.huang@....com>
To:     Pavel Machek <pavel@....cz>
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Subject: RE: [PATCH V2 1/5] dt-bindings: fsl: scu: add scu power key binding

Hi, Pavel

> Subject: Re: [PATCH V2 1/5] dt-bindings: fsl: scu: add scu power key binding
> 
> Hi!
> 
> > 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>
> 
> > +++ 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.
> >
> > +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
> 
> Actually there's no reason for having "linux,keycodes" property when it is
> always a power button.
The latest version of patch already change the compatible name to *-sc-key which
is more general as key driver, so the "linux,keycodes" is needed now for driver
to define the key function.

Thanks,
Anson