linux-kernel - Re: [PATCH 1/6] arm64: dts: rockchip: rk3399-roc-pc: Fix MMC numbering for LED triggers

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Date:   Mon, 6 Apr 2020 11:13:13 +0200
From:   Pavel Machek <pavel@....cz>
To:     Robin Murphy <robin.murphy@....com>
Cc:     Chen-Yu Tsai <wens@...nel.org>, Johan Jonker <jbx6244@...il.com>,
        Heiko Stübner <heiko@...ech.de>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        jacek.anaszewski@...il.com, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/6] arm64: dts: rockchip: rk3399-roc-pc: Fix MMC
 numbering for LED triggers

Hi!

> > > arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dt.yaml: leds:
> > > diy-led:linux,default-trigger:0: 'mmc2' is not one of ['backlight',
> > > 'default-on', 'heartbeat', 'disk-activity', 'ide-disk', 'timer', 'pattern']
> > > arch/arm64/boot/dts/rockchip/rk3399-roc-pc-mezzanine.dt.yaml: leds:
> > > yellow-led:linux,default-trigger:0: 'mmc1' is not one of ['backlight',
> > > 'default-on', 'heartbeat', 'disk-activity', 'ide-disk', 'timer', 'pattern']
> > 
> > Maybe we should just get rid of linux,default-trigger then?
> 
> In this particular case, I'd say it's probably time to reevaluate the rather
> out-of-date binding. The apparent intent of the "linux,default-trigger"
> property seems to be to describe any trigger supported by Linux, so either
> the binding wants to be kept in sync with all the triggers Linux actually
> supports, or perhaps it should just be redefined as a free-form

It is enough to keep it in sync with all the triggers we actually use :-).

> I'd be slightly inclined towards the latter, since the schema validator
> can't know whether the given trigger actually corresponds to the correct
> thing for whatever the LED is physically labelled on the board/case, nor
> whether the version(s) of Linux that people intend to use actually support
> that trigger (since it doesn't have to be the version contemporary with the
> schema definition), so strict validation of this particular property seems
> to be of limited value.

But freeform seems acceptable, too.

> > > > -             diy-led {
> > > > +             diy_led: diy-led {
> > > >                        label = "red:diy";
> > > >                        gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
> > > >                        default-state = "off";
> > > >                        linux,default-trigger = "mmc1";
> > > >                };

This label probably should be "mmc1:red:activity" or something like that.

> > > > -             yellow-led {
> > > > +             yellow_led: yellow-led {
> > > >                        label = "yellow:yellow-led";
> > > >                        gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
> > > >                        default-state = "off";

And this label should be changed, too.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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