Re: [PATCH v2 03/13] dt-bindings: phy: qcom,msm8998-qmp-usb3-phy: support dual TCSR registers

[Krzysztof Kozlowski <krzk@kernel.org>]

On 22/07/2025 09:22, Xiangxu Yin wrote:
> Add support for specifying two TCSR register addresses in the
> qcom,tcsr-reg property to enable DP-only mode switching. This change
> maintains backward compatibility with the original single-register
> format.
> 
> Also update #clock-cells and #phy-cells to <1> to support clock and PHY
> provider interfaces, respectively. This is required for platforms that
> consume the PHY clock and select PHY mode dynamically.
> 
> Signed-off-by: Xiangxu Yin <xiangxu.yin@oss.qualcomm.com>
> ---
>  .../bindings/phy/qcom,msm8998-qmp-usb3-phy.yaml    | 28 +++++++++++++++++-----
>  1 file changed, 22 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,msm8998-qmp-usb3-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,msm8998-qmp-usb3-phy.yaml
> index 1636285fbe535c430fdf792b33a5e9c523de323b..badfc46cda6c3a128688ac63b00d97dc2ba742d6 100644
> --- a/Documentation/devicetree/bindings/phy/qcom,msm8998-qmp-usb3-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/qcom,msm8998-qmp-usb3-phy.yaml
> @@ -44,13 +44,21 @@ properties:
>    vdda-pll-supply: true
>  
>    "#clock-cells":
> -    const: 0
> +    oneOf:
> +      - description: Set to 0 for legacy platforms without clock provider
> +        const: 0
> +      - description: Set to 1 to expose PHY pipe clock.
> +        const: 1
>  
>    clock-output-names:
>      maxItems: 1
>  
>    "#phy-cells":
> -    const: 0
> +    oneOf:
> +      - description: Set to 0 for legacy platforms
> +        const: 0
> +      - description: Set to 1 to supports mode selection (e.g. USB/DP)
> +        const: 1

I don't understand why EXISTING platforms now get more clocks. What did
you change in the hardware? This you must explain in the commit msg.


Best regards,
Krzysztof