[PATCH 1/2] dt-bindings: usb: snps,dwc3: Allow power-domains property

[Rob Herring]

On Tue, Dec 20, 2022 at 1:34 AM Felipe Balbi <balbi at kernel.org> wrote:
>
>
> Hi,
>
> Rob Herring <robh at kernel.org> writes:
>
> > The Rockchip RK3399 DWC3 node has 'power-domain' property which isn't
> > allowed by the schema:
> >
> > usb at fe900000: Unevaluated properties are not allowed ('power-domains' was unexpected)
> >
> > Allow DWC3 nodes to have a single power-domains entry. We could instead
> > move the power-domains property to the parent wrapper node, but the
> > could be an ABI break (Linux shouldn't care). Also, we don't want to
> > encourage the pattern of wrapper nodes just to define resources such as
> > clocks, resets, power-domains, etc. when not necessary.
> >
> > Signed-off-by: Rob Herring <robh at kernel.org>
> > ---
> >  Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > index 6d78048c4613..bcefd1c2410a 100644
> > --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
> > @@ -91,6 +91,9 @@ properties:
> >          - usb2-phy
> >          - usb3-phy
> >
> > +  power-domains:
> > +    maxItems: 1
>
> AFAICT this can be incorrect. Also, you could have Cc the dwc3
> maintainer to get comments.

When we have a user with more and know what each one is, then we can
extend it. All the other users (upstream), put 'power-domains' in the
wrapper node. But this is what we need now for RK3399.

I used get_maintainers.pl. If that's the wrong output, fix it please.

Rob