linux-kernel - Re: [PATCH v2 1/4] dt-bindings: phy: qcom,snps-eusb2-repeater: Add magic tuning overrides

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Date:   Thu, 14 Sep 2023 09:48:07 -0500
From:   Rob Herring <robh@...nel.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Abel Vesa <abel.vesa@...aro.org>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: phy: qcom,snps-eusb2-repeater: Add
 magic tuning overrides

On Wed, Sep 13, 2023 at 11:53:23AM +0200, Konrad Dybcio wrote:
> The EUSB2 repeater requires some alterations to its init sequence,
> depending on board design.
> 
> Add support for making the necessary changes to that sequence to make USB
> functional on SM8550-based Xperia 1 V.
> 
> They all have lackluster description due to lack of information.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  .../bindings/phy/qcom,snps-eusb2-repeater.yaml      | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml b/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
> index 029569d5fcf3..24c733c10e0e 100644
> --- a/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
> +++ b/Documentation/devicetree/bindings/phy/qcom,snps-eusb2-repeater.yaml
> @@ -32,6 +32,27 @@ properties:
>  
>    vdd3-supply: true
>  
> +  qcom,tune-usb2-disc-thres:
> +    $ref: /schemas/types.yaml#/definitions/uint8
> +    description: High-Speed disconnect threshold
> +    minimum: 0
> +    maximum: 7
> +    default: 0
> +
> +  qcom,tune-usb2-amplitude:
> +    $ref: /schemas/types.yaml#/definitions/uint8
> +    description: High-Speed trasmit amplitude
> +    minimum: 0
> +    maximum: 15
> +    default: 8
> +
> +  qcom,tune-usb2-preem:
> +    $ref: /schemas/types.yaml#/definitions/uint8
> +    description: High-Speed TX pre-emphasis tuning
> +    minimum: 0
> +    maximum: 7
> +    default: 5

For what it is worth, the mediatek,tphy.yaml binding has the same 
properties...

Acked-by: Rob Herring <robh@...nel.org>