linux-kernel - Re: [PATCH 2/2] dt-bindings: pwm: mediatek: Add compatible string for MT7986

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Message-ID: <Y1MkIdFXrBrrv958@makrotopia.org>
Date:   Fri, 21 Oct 2022 23:58:41 +0100
From:   Daniel Golle <daniel@...rotopia.org>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thierry Reding <thierry.reding@...il.com>,
        linux-mediatek@...ts.infradead.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] dt-bindings: pwm: mediatek: Add compatible string
 for MT7986

On Fri, Oct 21, 2022 at 05:23:38PM -0500, Rob Herring wrote:
> On Fri, Oct 21, 2022 at 04:25:18PM +0100, Daniel Golle wrote:
> > Add new compatible string for MT7986 PWM.
> > 
> > Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> > ---
> >  Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> > index 554c96b6d0c3e0..6f4e60c9e18b81 100644
> > --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> > +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> > @@ -8,6 +8,7 @@ Required properties:
> >     - "mediatek,mt7623-pwm": found on mt7623 SoC.
> >     - "mediatek,mt7628-pwm": found on mt7628 SoC.
> >     - "mediatek,mt7629-pwm": found on mt7629 SoC.
> > +   - "mediatek,mt7986-pwm": found on mt7986 SoC.
> 
> This version of the PWM h/w is not compatible with any of the existing 
> chips? If it is, it should have a fallback compatible.

No, it is unique because it comes with just 2 PWM channels.
Otherwise the driver behaves just like for MT8183 (4 channels) or
MT8365 (3 channels) which also got distinct compatible strings.

> 
> >     - "mediatek,mt8183-pwm": found on mt8183 SoC.
> >     - "mediatek,mt8195-pwm", "mediatek,mt8183-pwm": found on mt8195 SoC.
> >     - "mediatek,mt8365-pwm": found on mt8365 SoC.
> > -- 
> > 2.38.1
> > 
> > 
>