Re: [PATCH 2/7] dt-bindings: phy: mediatek,tphy: add property to set pre-emphasis

[Krzysztof Kozlowski]

On 19/08/2022 12:13, Chunfeng Yun wrote:
> Add a property to set usb2 phy's pre-emphasis.
> 
> Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> ---
>  Documentation/devicetree/bindings/phy/mediatek,tphy.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> index 848edfb1f677..aee2f3027371 100644
> --- a/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> +++ b/Documentation/devicetree/bindings/phy/mediatek,tphy.yaml
> @@ -219,6 +219,13 @@ patternProperties:
>          minimum: 1
>          maximum: 15
>  
> +      mediatek,pre-emphasis:
> +        description:
> +          The selection of pre-emphasis (U2 phy)
> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        minimum: 1
> +        maximum: 3

Instead of hard-coding register values in bindings, you should rather
describe here feature/effect. If it is in units, use unit suffixes. If
it is some choice, usually string enum is appropriate.

Best regards,
Krzysztof