linux-kernel - Re: [PATCH v2 1/3] dt-bindings: usb: usb-xhci: Add bindings for usb-skip-phy-init property

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Date:   Fri, 12 Nov 2021 16:47:31 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sandeep Maheswaram <quic_c_sanm@...cinc.com>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        quic_pkondeti@...cinc.com, quic_ppratap@...cinc.com
Subject: Re: [PATCH v2 1/3] dt-bindings: usb: usb-xhci: Add bindings for
 usb-skip-phy-init property

On Mon, Nov 08, 2021 at 12:11:48PM +0530, Sandeep Maheswaram wrote:
> Adding bindings for usb-skip-phy-init property.
> Runtime suspend of phy drivers was failing from DWC3 driver as
> runtime usage value is 2 because the phy is initialized from
> DWC3 core and HCD core.
> Some controllers like DWC3 and CDNS3 manage phy in their core drivers.
> This property can be set to avoid phy initialization in HCD core.

You already know if you have a DWC3 and CDNS3 controller, so you don't 
need more data in DT.

> 
> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
> ---
>  Documentation/devicetree/bindings/usb/usb-xhci.yaml | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.yaml b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> index 965f87f..a64d29f 100644
> --- a/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> +++ b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
> @@ -25,6 +25,10 @@ properties:
>      description: Set if the controller has broken port disable mechanism
>      type: boolean
>  
> +  usb-skip-phy-init:
> +    description: Set if the phy initialization is managed by controller
> +    type: boolean
> +
>    imod-interval-ns:
>      description: Interrupt moderation interval
>      default: 5000
> -- 
> 2.7.4
> 
>