[PATCH v4 1/3] dt-bindings: net: sophgo,sg2044-dwmac: add phy mode restriction

[Conor Dooley]

On Wed, Oct 29, 2025 at 08:56:09AM +0800, Inochi Amaoto wrote:
> On Tue, Oct 28, 2025 at 07:22:37PM +0000, Conor Dooley wrote:
> > On Tue, Oct 28, 2025 at 08:38:56AM +0800, Inochi Amaoto wrote:
> > > As the ethernet controller of SG2044 and SG2042 only supports
> > > RGMII phy. Add phy-mode property to restrict the value.
> > > 
> > > Also, since SG2042 has internal rx delay in its mac, make
> > > only "rgmii-txid" and "rgmii-id" valid for phy-mode.
> > 
> > Should this have a fixes tag?
> > Acked-by: Conor Dooley <conor.dooley at microchip.com>
> > 
> 
> Although I add a fixes tag to the driver, I am not sure whether the
> binding requires it. But if it is required, I think it should be

Kinda depends for bindings, amending a binding for completeness probably
doesn't need one but amending it to actually permit a functional
configuration does. This is somewhere in-between I suppose. If a driver
change is coming along with it which is likely to be backported, that'd
be a vote in favour of a fixes tag here too, so that the binding and
driver match in stable.

> 
> Fixes: e281c48a7336 ("dt-bindings: net: sophgo,sg2044-dwmac: Add support for Sophgo SG2042 dwmac")
> 
> > > 
> > > Signed-off-by: Inochi Amaoto <inochiama at gmail.com>
> > > ---
> > >  .../bindings/net/sophgo,sg2044-dwmac.yaml     | 20 +++++++++++++++++++
> > >  1 file changed, 20 insertions(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > > index ce21979a2d9a..916ef8f4838a 100644
> > > --- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > > +++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > > @@ -70,6 +70,26 @@ required:
> > >  
> > >  allOf:
> > >    - $ref: snps,dwmac.yaml#
> > > +  - if:
> > > +      properties:
> > > +        compatible:
> > > +          contains:
> > > +            const: sophgo,sg2042-dwmac
> > > +    then:
> > > +      properties:
> > > +        phy-mode:
> > > +          enum:
> > > +            - rgmii-txid
> > > +            - rgmii-id
> > > +    else:
> > > +      properties:
> > > +        phy-mode:
> > > +          enum:
> > > +            - rgmii
> > > +            - rgmii-rxid
> > > +            - rgmii-txid
> > > +            - rgmii-id
> > > +
> > >  
> > >  unevaluatedProperties: false
> > >  
> > > -- 
> > > 2.51.1
> > > 
> 
> 
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