Re: [PATCH v3 4/5] dt-bindings: cpufreq: cpufreq-qcom-hw: Add SDX75 compatible

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On Wed, Jun 07, 2023 at 05:17:48PM +0530, Rohit Agarwal wrote:
> Add compatible for EPSS CPUFREQ-HW on SDX75.
> 
> Signed-off-by: Rohit Agarwal <quic_rohiagar@xxxxxxxxxxx>
> Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> ---
>  Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> index a6b3bb8..866ed2d 100644
> --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml
> @@ -36,6 +36,7 @@ properties:
>                - qcom,sa8775p-cpufreq-epss
>                - qcom,sc7280-cpufreq-epss
>                - qcom,sc8280xp-cpufreq-epss
> +              - qcom,sdx75-cpufreq-epss
>                - qcom,sm6375-cpufreq-epss
>                - qcom,sm8250-cpufreq-epss
>                - qcom,sm8350-cpufreq-epss

This is a very basic question, not completely related to this patch.
Apologies in advance.

What is the rationale for adding a new soc string under compatible and
using it in the new soc device tree? Is it meant for documentation purpose?
i.e one know what all SoCs / boards supported by this device node.

I ask this because, we don't add these compatible strings in the driver
[1] which means there is not SoC specific handling and there is no
module load assist (module alias matching by user space based on device
presence).

Thanks,
Pavan



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