[PATCH v8 1/3] dt-bindings: net: sophgo,sg2044-dwmac: add phy mode restriction

[Inochi Amaoto]

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 at gmail.com>
> Acked-by: Conor Dooley <conor.dooley at 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
>