linux-kernel - Re: [PATCH v14 3/9] dt-bindings: soc: qcom: cpr3: Add bindings for CPR3 driver

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Message-ID: <CAPDyKFrXT+2NEMUzVv-kWjXAhLinXq99GKq4_Ge2VjthtYxtaA@mail.gmail.com>
Date:   Tue, 29 Aug 2023 13:01:44 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Niklas Cassel <nks@...wful.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Robert Marko <robimarko@...il.com>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pm@...r.kernel.org,
        Jeffrey Hugo <quic_jhugo@...cinc.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>
Subject: Re: [PATCH v14 3/9] dt-bindings: soc: qcom: cpr3: Add bindings for
 CPR3 driver

On Mon, 28 Aug 2023 at 13:42, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>
> From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
>
> Add the bindings for the CPR3 driver to the documentation.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...ainline.org>
> [Konrad: Make binding check pass; update AGdR's email]
> Tested-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
>  .../devicetree/bindings/soc/qcom/qcom,cpr3.yaml    | 286 +++++++++++++++++++++
>  1 file changed, 286 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,cpr3.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,cpr3.yaml
> new file mode 100644
> index 000000000000..acf2e294866b

[...]

> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-msm8998.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +
> +    cpus {
> +        #address-cells = <2>;
> +        #size-cells = <0>;
> +
> +        cpu@0 {
> +            compatible = "qcom,kryo280";
> +            device_type = "cpu";
> +            reg = <0x0 0x0>;
> +            operating-points-v2 = <&cpu0_opp_table>;
> +            power-domains = <&apc_cprh 0>;
> +            power-domain-names = "cprh";

Rather than using a Qcom specific power-domain-name, perhaps a common
power-domain-name for cpus, that can be used for "the performance
domain" would be a good idea here?

I have suggested using "perf" for the SCMI performance domain [1],
perhaps that description should be extended to cover this and other
performance domains too?

> +        };
> +
> +        cpu@100 {
> +            compatible = "qcom,kryo280";
> +            device_type = "cpu";
> +            reg = <0x0 0x100>;
> +            operating-points-v2 = <&cpu4_opp_table>;
> +            power-domains = <&apc_cprh 1>;
> +            power-domain-names = "cprh";
> +        };
> +    };

[...]

Kind regards
Uffe

[1]
https://lore.kernel.org/linux-arm-kernel/20230825112633.236607-9-ulf.hansson@linaro.org/