linux-kernel - Re: [PATCH 06/13] arm64: dts: mediatek: mt8188: Update VPPSYS node name and compatible

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Message-ID: <CAC=S1nhiJ=7yAucJsaYKUUBrwrxOVBMB2CF=bFwyLa2o-5RmWw@mail.gmail.com>
Date: Tue, 10 Sep 2024 13:12:15 +0800
From: Fei Shao <fshao@...omium.org>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
	Matthias Brugger <matthias.bgg@...il.com>, Conor Dooley <conor+dt@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 06/13] arm64: dts: mediatek: mt8188: Update VPPSYS node
 name and compatible

On Mon, Sep 9, 2024 at 7:41 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On 09/09/2024 13:14, Fei Shao wrote:
> > Use and add "syscon" in VPPSYS node names and compatible to fix errors
> > from `make CHECK_DTBS=y mediatek/mt8188-evb.dtb`.
> >
> > Signed-off-by: Fei Shao <fshao@...omium.org>
> > ---
> >
> >  arch/arm64/boot/dts/mediatek/mt8188.dtsi | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > index 2900d78b7ceb..14e51a11f688 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > +++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
> > @@ -1799,8 +1799,8 @@ mfgcfg: clock-controller@...bf000 {
> >                       #clock-cells = <1>;
> >               };
> >
> > -             vppsys0: clock-controller@...00000 {
> > -                     compatible = "mediatek,mt8188-vppsys0";
> > +             vppsys0: syscon@...00000 {
> > +                     compatible = "mediatek,mt8188-vppsys0", "syscon";
>
> If this was working before, it looks like this is not a syscon and
> bindings need to be fixed.

I guess it's because the binding was later updated in commit
26bcd8a53098 ("dt-bindings: arm: mediatek: mmsys: Add VPPSYS
compatible for MT8188"), and the corresponding DT update was unnoticed
at the time.
If that makes sense then this should be a valid fix.

Regards,
Fei

>
> Best regards,
> Krzysztof
>