[PATCH v2 1/3] dt-bindings: phy: imx8mq-usb: improve some tuning properties

[Krzysztof Kozlowski]

On 29/04/2025 05:30, Xu Yang wrote:
> Commit b2e75563dc39 ("dt-bindings: phy: imx8mq-usb: add phy tuning
> properties") add many tuning properties, but some parameter value doesn't
> match the register description. It made some changes based on the original
> value: add offset to a negative number so turn it to a non-negative number.
> However, it's not easy to find an exact tuning value from register field
> with such conversion.
> 
> Because device-tree supports negative parameter number, this will improve
> some propertie's parameter.
> 
> Mainly include below properties:
>  - fsl,phy-tx-vref-tune-percent
>  - fsl,phy-tx-rise-tune-percent
>  - fsl,phy-comp-dis-tune-percent
> 
> The parameter value of above 3 properties are USB PHY specific. i.MX8MP
> and i.MX95 USB PHY has different meanings. So this add restrictions for
> them.
> 
>  - fsl,phy-tx-vboost-level-microvolt
> 
> For this property, the parameter value is wrong in register description.
> This will correct it according to true value.
> 
> For detailed info, please refer to i.MX8MP and i.MX95 latest reference
> manual.
> 
> Signed-off-by: Xu Yang <xu.yang_2 at nxp.com>
> 
> ---
> Changes in v2:
>  - keep widest constraints
>  - use multipleOf for some properties
> ---
>  .../bindings/phy/fsl,imx8mq-usb-phy.yaml      | 60 +++++++++++++++----
>  1 file changed, 49 insertions(+), 11 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
> index daee0c0fc915..71e5940ef4b8 100644
> --- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
> @@ -42,16 +42,17 @@ properties:
>  
>    fsl,phy-tx-vref-tune-percent:
>      description:
> -      Tunes the HS DC level relative to the nominal level
> -    minimum: 94
> -    maximum: 124
> +      Tunes the HS DC level relative to the nominal level. It varies
> +      between different PHY versions
> +    minimum: -1000
> +    maximum: 875

Nothing improved here. You just sent v2 ignoring reviewers feedback.

NAK
Best regards,
Krzysztof