linux-kernel - Re: [PATCH 2/8] dt-bindings: soc: qcom: eud: Add usb role switch property

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Message-ID: <7aec2a72-3276-4837-87fb-ac974588fd53@kernel.org>
Date: Wed, 31 Jul 2024 07:36:55 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Elson Roy Serrao <quic_eserrao@...cinc.com>, andersson@...nel.org,
 konrad.dybcio@...aro.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, gregkh@...uxfoundation.org
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/8] dt-bindings: soc: qcom: eud: Add usb role switch
 property

On 31/07/2024 00:24, Elson Roy Serrao wrote:
> EUD hub is physically present in between the USB connector and the
> USB controller. So the role switch notifications originating from
> the connector should route through EUD. Hence to interpret the usb
> role assigned by the connector, role switch property is needed.
> 
> Signed-off-by: Elson Roy Serrao <quic_eserrao@...cinc.com>
> ---
>  Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> index fca5b608ec63..0fa4608568d0 100644
> --- a/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,eud.yaml
> @@ -37,6 +37,10 @@ properties:
>      items:
>        - const: usb2-phy
>  
> +  usb-role-switch:
> +    $ref: /schemas/types.yaml#/definitions/flag
> +    description: Support role switch.

So both EUD and DWC3 controller (as this binding states) are role switching?

Best regards,
Krzysztof