Re: [PATCH 1/8] dt-bindings: clock: qcom: Allow VDD_GFX supply to GX

[Bjorn Andersson]

On Thu, Dec 21, 2023 at 09:10:28AM +0200, Dmitry Baryshkov wrote:
> On Thu, 21 Dec 2023 at 09:03, Dmitry Baryshkov
> <dmitry.baryshkov@xxxxxxxxxx> wrote:
> >
> > On Thu, 21 Dec 2023 at 05:51, Bjorn Andersson <quic_bjorande@xxxxxxxxxxx> wrote:
> > >
> > > In some designs the SoC's VDD_GFX pads are supplied by an external
> > > regulator, rather than a power-domain. Allow this to be described in the
> > > GPU clock controller binding.
> > >
> > > Signed-off-by: Bjorn Andersson <quic_bjorande@xxxxxxxxxxx>
> > > ---
> > >  Documentation/devicetree/bindings/clock/qcom,gpucc.yaml | 3 +++
> > >  1 file changed, 3 insertions(+)
> > >
> > > diff --git a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> > > index f369fa34e00c..013ef78d2b31 100644
> > > --- a/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> > > +++ b/Documentation/devicetree/bindings/clock/qcom,gpucc.yaml
> > > @@ -53,6 +53,9 @@ properties:
> > >    power-domains:
> > >      maxItems: 1
> > >
> > > +  vdd-gfx-supply:
> > > +    description: Regulator supply for the VDD_GFX pads
> > > +
> > >    '#clock-cells':
> > >      const: 1
> >
> > I think it might be good to restrict this property to a particular
> > platform (via if:not:properties:compatible:contains
> > then:properties:vdd-gfx-supply:false).
> 
> After reading the last patches in the series, there is another
> suggestion. Maybe we should explicitly say that there should be either
> power-domains or vdd-gfx-supply, but not both.
> 

Even on this platform it's not a property of the SoC, but surrounding
design. So I like this proposal.

Thanks,
Bjorn