Re: [PATCH RFC 1/4] dt-bindings: clock: qcom,sm8550-tcsr: Add QREF regulator supplies for glymur

[Qiang Yu <qiang.yu@oss.qualcomm.com>]

On Wed, Apr 01, 2026 at 09:18:12AM +0200, Krzysztof Kozlowski wrote:
> On 01/04/2026 08:35, Qiang Yu wrote:
> > The glymur TCSR PCIe clkref clocks require regulator supplies for the
> > QREF block and its refgen reference voltage generator. Add the optional
> > supply properties restricted to qcom,glymur-tcsr via an allOf/if/then
> > conditional schema.
> > 
> > Switch from additionalProperties to unevaluatedProperties so that
> > properties defined inside the if/then block are correctly recognised as
> > evaluated and not rejected by the schema validator.
> 
> Sorry, but no. There is a reason for that why additionalProperties fail
> and writing-bindings explain that.
>

Okay, will change this part.

> > 
> > Signed-off-by: Qiang Yu <qiang.yu@oss.qualcomm.com>
> > ---
> >  .../bindings/clock/qcom,sm8550-tcsr.yaml           | 26 +++++++++++++++++++++-
> >  1 file changed, 25 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml b/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> > index ae9aef0e54e8b8b85bc70e6096d524447091f39e..88db650e69ef2388a5bfb6783a57c1d48c0e780f 100644
> > --- a/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> > +++ b/Documentation/devicetree/bindings/clock/qcom,sm8550-tcsr.yaml
> > @@ -49,11 +49,35 @@ properties:
> >    '#reset-cells':
> >      const: 1
> >  
> > +allOf:
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: qcom,glymur-tcsr
> > +    then:
> > +      properties:
> > +        vdda-refgen-0p9-supply: true
> > +        vdda-refgen-1p2-supply: true
> > +        vdda-qrefrx0-0p9-supply: true
> > +        vdda-qrefrx1-0p9-supply: true
> > +        vdda-qrefrx2-0p9-supply: true
> > +        vdda-qrefrx4-0p9-supply: true
> > +        vdda-qrefrx5-0p9-supply: true
> > +        vdda-qreftx0-0p9-supply: true
> > +        vdda-qreftx0-1p2-supply: true
> > +        vdda-qreftx1-0p9-supply: true
> > +        vdda-qrefrpt0-0p9-supply: true
> > +        vdda-qrefrpt1-0p9-supply: true
> > +        vdda-qrefrpt2-0p9-supply: true
> > +        vdda-qrefrpt3-0p9-supply: true
> > +        vdda-qrefrpt4-0p9-supply: true
> 
> I really doubt that TCSR, which is a small, tiny tiny block the in SoC
> have this ~15 pin supplies.
> 
> Anyway, if it has, then device is quite different and should live in its
> own schema.

TX/RPT/RX are common QREF components across platforms; what changes by SoC
is the number of instances and the routing topology.

For example, a single PCIe path on Glymur and Kaanapali:

- Glymur: CXO -> TX0 -> RPT0 -> RPT1 -> RPT2 -> RX2 -> PCIe4_PHY
- Kaanapali: CXO -> TX0 -> RPT0 -> RPT1 -> RX0 -> PCIe0_PHY

The DT supplies added in this series (vdda-qreftx*, vdda-qrefrpt*
vdda-qrefrx*) supply to these TX/RPT/RX components and can be resused by
other plarforms.

- Qiang Yu