Re: [PATCH 1/9] dt-bindings: gpu: mali-bifrost: Don't allow sram-supply by default

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On Thu, Feb 09, 2023 at 10:15:33AM +0100, AngeloGioacchino Del Regno wrote:
> Il 09/02/23 03:50, Chen-Yu Tsai ha scritto:
> > On Wed, Feb 8, 2023 at 6:37 PM AngeloGioacchino Del Regno
> > <angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
> > > 
> > > The sram-supply is MediaTek-specific, it is and will ever be used
> > > only for the mediatek,mt8183-mali compatible due to the addition of
> > > the mediatek-regulator-coupler driver: change the binding to add
> > > this supply when mediatek,mt8183-mali is present as a compatible
> > > instead of disabling it when not present.
> > > 
> > > This is done in preparation for adding new bindings for other
> > > MediaTek SoCs, such as MT8192 and others.
> > > 
> > > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
> > > ---
> > >   Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml | 4 +---
> > >   1 file changed, 1 insertion(+), 3 deletions(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > > index 78964c140b46..69212f3b1328 100644
> > > --- a/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > > +++ b/Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml
> > > @@ -57,8 +57,6 @@ properties:
> > > 
> > >     mali-supply: true
> > > 
> > > -  sram-supply: true
> > > -
> > 
> > Have you tried actually validating the device trees against this?
> > Based on my previous tests this gives out errors.
> 
> I did... and I didn't get any complaint... but perhaps something went wrong
> on my side?
> 
> I mean, I can retry just to be sure.

You should need unevaluatedProperties instead of additionalProperties 
for this to work. The latter cannot 'see' into an if/then schema.

But really we want the default top level to allow this and then disallow 
it in an if/then schema.

Rob



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