linux-kernel - Re: [PATCH 2/3] arm64: dts: qcom: ipq6018: add ipq6000 CPU OPP tables

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Date: Wed, 31 Jan 2024 14:26:48 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Chukun Pan <amadeus@....edu.cn>
Cc: Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Rob Herring <robh+dt@...nel.org>, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/3] arm64: dts: qcom: ipq6018: add ipq6000 CPU OPP tables

On Wed, 31 Jan 2024 at 12:23, Chukun Pan <amadeus@....edu.cn> wrote:
>
> Some IPQ6000 SoCs don't have pmic chips, and fused 1.2GHz.
> Add a separate CPU OPP tables for these SoCs.
>
> Signed-off-by: Chukun Pan <amadeus@....edu.cn>
> ---
>  arch/arm64/boot/dts/qcom/ipq6000-opp.dtsi | 49 +++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/qcom/ipq6000-opp.dtsi
>
> diff --git a/arch/arm64/boot/dts/qcom/ipq6000-opp.dtsi b/arch/arm64/boot/dts/qcom/ipq6000-opp.dtsi
> new file mode 100644
> index 000000000000..acb4774da33e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/ipq6000-opp.dtsi
> @@ -0,0 +1,49 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * IPQ6000 without PMIC (MP5496) CPU OPP tables
> + */
> +
> +/ {
> +       cpu_opp_table: opp-table-cpu {
> +               compatible = "operating-points-v2-kryo-cpu";
> +               nvmem-cells = <&cpu_speed_bin>;
> +               opp-shared;
> +
> +               opp-864000000 {
> +                       opp-hz = /bits/ 64 <864000000>;
> +                       opp-microvolt = <725000>;
> +                       opp-supported-hw = <0xf>;
> +                       clock-latency-ns = <200000>;
> +               };
> +
> +               opp-1056000000 {
> +                       opp-hz = /bits/ 64 <1056000000>;
> +                       opp-microvolt = <787500>;
> +                       opp-supported-hw = <0xf>;
> +                       clock-latency-ns = <200000>;
> +               };
> +
> +               opp-1200000000 {
> +                       opp-hz = /bits/ 64 <1200000000>;
> +                       opp-microvolt = <850000>;
> +                       opp-supported-hw = <0x4>;
> +                       clock-latency-ns = <200000>;
> +               };

I don't see this OPP entry in the existing table. If it is supported
by the SoC, please add it to that table instead.

> +       };
> +};
> +
> +&CPU0 {
> +       operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&CPU1 {
> +       operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&CPU2 {
> +       operating-points-v2 = <&cpu_opp_table>;
> +};
> +
> +&CPU3 {
> +       operating-points-v2 = <&cpu_opp_table>;
> +};
> --
> 2.25.1
>
>


-- 
With best wishes
Dmitry