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.

Fixes: e281c48a7336 ("dt-bindings: net: sophgo,sg2044-dwmac: Add support for Sophgo SG2042 dwmac")
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../bindings/net/sophgo,sg2044-dwmac.yaml     | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
index ce21979a2d9a..e8d3814db0e9 100644
--- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
@@ -70,6 +70,25 @@ required:
 
 allOf:
   - $ref: snps,dwmac.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: sophgo,sg2042-dwmac
+    then:
+      properties:
+        phy-mode:
+          enum:
+            - rgmii-rxid
+            - rgmii-id
+    else:
+      properties:
+        phy-mode:
+          enum:
+            - rgmii
+            - rgmii-rxid
+            - rgmii-txid
+            - rgmii-id
 
 unevaluatedProperties: false
 
-- 
2.51.2

On Fri, Nov 14, 2025 at 08:38:03AM +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.
> 
> Fixes: e281c48a7336 ("dt-bindings: net: sophgo,sg2044-dwmac: Add support for Sophgo SG2042 dwmac")
> Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
> Acked-by: Conor Dooley <conor.dooley@microchip.com>

> ---
>  .../bindings/net/sophgo,sg2044-dwmac.yaml     | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> index ce21979a2d9a..e8d3814db0e9 100644
> --- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> +++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> @@ -70,6 +70,25 @@ required:
>  
>  allOf:
>    - $ref: snps,dwmac.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: sophgo,sg2042-dwmac
> +    then:
> +      properties:
> +        phy-mode:
> +          enum:

> +            - rgmii-rxid
> +            - rgmii-id

Hi, Conor,

I have restricted the phy-mode with wrong mode here, it should be
rgmii-rxid instead of rgmii-txid as the SG2042 always add rx delay
in their mac. As this is more like a mistake for me when writing
the binding, I keep you tag with the fix. If you need something
further, please let me know.

Regards,
Inochi

> +    else:
> +      properties:
> +        phy-mode:
> +          enum:
> +            - rgmii
> +            - rgmii-rxid
> +            - rgmii-txid
> +            - rgmii-id
>  
>  unevaluatedProperties: false
>  
> -- 
> 2.51.2
>

On Fri, Nov 14, 2025 at 08:44:15AM +0800, Inochi Amaoto wrote:
> On Fri, Nov 14, 2025 at 08:38:03AM +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.
> > 
> > Fixes: e281c48a7336 ("dt-bindings: net: sophgo,sg2044-dwmac: Add support for Sophgo SG2042 dwmac")
> > Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
> > Acked-by: Conor Dooley <conor.dooley@microchip.com>
> 
> > ---
> >  .../bindings/net/sophgo,sg2044-dwmac.yaml     | 19 +++++++++++++++++++
> >  1 file changed, 19 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > index ce21979a2d9a..e8d3814db0e9 100644
> > --- a/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > +++ b/Documentation/devicetree/bindings/net/sophgo,sg2044-dwmac.yaml
> > @@ -70,6 +70,25 @@ required:
> >  
> >  allOf:
> >    - $ref: snps,dwmac.yaml#
> > +  - if:
> > +      properties:
> > +        compatible:
> > +          contains:
> > +            const: sophgo,sg2042-dwmac
> > +    then:
> > +      properties:
> > +        phy-mode:
> > +          enum:
> 
> > +            - rgmii-rxid
> > +            - rgmii-id
> 
> Hi, Conor,
> 
> I have restricted the phy-mode with wrong mode here, it should be
> rgmii-rxid instead of rgmii-txid as the SG2042 always add rx delay
> in their mac. As this is more like a mistake for me when writing
> the binding, I keep you tag with the fix. If you need something
> further, please let me know.

Yeah that's fine chief. In general, if it is some hardware detail
that I couldn't possibly know was correct or incorrect without
reading the device's documentation then I probably don't care about
the binding change required for it when it's so minimal. Probably the
same goes for Rob and Krzysztof.