linux-kernel - Re: [PATCH v3 2/7] dt-bindings: clock: qcom,videocc: add mmcx power domain

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Date:   Fri, 9 Jul 2021 13:55:00 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Andy Gross <agross@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Michael Turquette <mturquette@...libre.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/7] dt-bindings: clock: qcom,videocc: add mmcx power
 domain

On Fri 09 Jul 12:31 CDT 2021, Dmitry Baryshkov wrote:

> On sm8250 videocc requires MMCX power domain to be powered up before
> clock controller's registers become available. For now sm8250 was using
> external regulator driven by the power domain to describe this
> relationship. Switch into specifying power-domain and required opp-state
> directly.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> ---
>  Documentation/devicetree/bindings/clock/qcom,videocc.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,videocc.yaml b/Documentation/devicetree/bindings/clock/qcom,videocc.yaml
> index 567202942b88..db4ada6acf27 100644
> --- a/Documentation/devicetree/bindings/clock/qcom,videocc.yaml
> +++ b/Documentation/devicetree/bindings/clock/qcom,videocc.yaml
> @@ -47,6 +47,11 @@ properties:
>    reg:
>      maxItems: 1
>  
> +  power-domains:
> +    description:
> +      A phandle and PM domain specifier for the MMCX power domain.
> +    maxItems: 1
> +
>  required:
>    - compatible
>    - reg
> @@ -61,6 +66,7 @@ additionalProperties: false
>  examples:
>    - |
>      #include <dt-bindings/clock/qcom,rpmh.h>
> +    #include <dt-bindings/power/qcom-rpmpd.h>
>      clock-controller@...0000 {
>        compatible = "qcom,sdm845-videocc";
>        reg = <0x0ab00000 0x10000>;
> @@ -69,5 +75,6 @@ examples:
>        #clock-cells = <1>;
>        #reset-cells = <1>;
>        #power-domain-cells = <1>;
> +      power-domains = <&rpmhpd SM8250_MMCX>;
>      };
>  ...
> -- 
> 2.30.2
>