linux-kernel - Re: [PATCH v3 2/7] dt-bindings: opp: accept array of frequencies

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Message-ID: <20220513172249.GB1922@thinkpad>
Date:   Fri, 13 May 2022 22:52:49 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Avri Altman <avri.altman@....com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Taniya Das <tdas@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-scsi@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v3 2/7] dt-bindings: opp: accept array of frequencies

On Fri, May 13, 2022 at 08:13:42AM +0200, Krzysztof Kozlowski wrote:
> Devices might need to control several clocks when scaling the frequency
> and voltage.  Allow passing array of clock frequencies, similarly to the
> voltages.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Acked-by: Rob Herring <robh@...nel.org>
> 
> ---
> 
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  Documentation/devicetree/bindings/opp/opp-v2-base.yaml | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/opp/opp-v2-base.yaml b/Documentation/devicetree/bindings/opp/opp-v2-base.yaml
> index 76c8acd981b3..66d0ec763f0b 100644
> --- a/Documentation/devicetree/bindings/opp/opp-v2-base.yaml
> +++ b/Documentation/devicetree/bindings/opp/opp-v2-base.yaml
> @@ -50,6 +50,16 @@ patternProperties:
>            property to uniquely identify the OPP nodes exists. Devices like power
>            domains must have another (implementation dependent) property.
>  
> +          Entries for multiple clocks shall be provided in the same field, as
> +          array of frequencies.  The OPP binding doesn't provide any provisions
> +          to relate the values to their clocks or the order in which the clocks
> +          need to be configured and that is left for the implementation
> +          specific binding.
> +        minItems: 1
> +        maxItems: 16
> +        items:
> +          maxItems: 1
> +
>        opp-microvolt:
>          description: |
>            Voltage for the OPP
> -- 
> 2.32.0
> 

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