linux-kernel - Re: [PATCH 1/3] dt-bindings: usb: qcom,dwc3: Add multi-pd bindings for dwc3 qcom

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Message-ID: <YTduDqCO9aUyAsw1@ripper>
Date:   Tue, 7 Sep 2021 06:50:06 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Sandeep Maheswaram <sanm@...eaurora.org>
Cc:     Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.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>,
        devicetree@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pratham Pratap <prathampratap@...eaurora.org>
Subject: Re: [PATCH 1/3] dt-bindings: usb: qcom,dwc3: Add multi-pd bindings
 for dwc3 qcom

On Mon 30 Aug 10:54 PDT 2021, Sandeep Maheswaram wrote:

> Add multi pd bindings to set performance state for cx domain
> to maintain minimum corner voltage for USB clocks.
> 
> Signed-off-by: Sandeep Maheswaram <sanm@...eaurora.org>
> ---
>  Documentation/devicetree/bindings/usb/qcom,dwc3.yaml | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
> index e70afc4..838d9c4 100644
> --- a/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
> +++ b/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
> @@ -41,7 +41,18 @@ properties:
>  
>    power-domains:
>      description: specifies a phandle to PM domain provider node
> -    maxItems: 1
> +    minItems: 1
> +    items:
> +      - description: optional,cx power domain
> +      - description: USB gdsc power domain
> +
> +  power-domain-names:
> +     items:
> +      - const: cx
> +      - const: usb_gdsc

But "usb_gdsc" is a subdomain of "cx", why can't we describe this fact
in gcc?

Regards,
Bjorn

> +
> +  required-opps:
> +    description: specifies the performance state to cx power domain
>  
>    clocks:
>      description:
> -- 
> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> of Code Aurora Forum, hosted by The Linux Foundation
>