linux-kernel - Re: [RESEND PATCH 12/12] arm64: dts: qcom: sm6115: Supply clock from cpufreq node to CPUs

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Date:   Thu, 16 Feb 2023 11:40:23 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, viresh.kumar@...aro.org
Subject: Re: [RESEND PATCH 12/12] arm64: dts: qcom: sm6115: Supply clock from
 cpufreq node to CPUs



On 15.02.2023 08:04, Manivannan Sadhasivam wrote:
> Qualcomm platforms making use of CPUFreq HW Engine (EPSS/OSM) supply clocks
> to the CPU cores. But this relationship is not represented in DTS so far.
> 
> So let's make cpufreq node as the clock provider and CPU nodes as the
> consumers. The clock index for each CPU node is based on the frequency
> domain index.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad
>  arch/arm64/boot/dts/qcom/sm6115.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6115.dtsi b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> index 4d6ec815b78b..f55b193139bf 100644
> --- a/arch/arm64/boot/dts/qcom/sm6115.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> @@ -39,6 +39,7 @@ CPU0: cpu@0 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x0>;
> +			clocks = <&cpufreq_hw 0>;
>  			capacity-dmips-mhz = <1024>;
>  			dynamic-power-coefficient = <100>;
>  			enable-method = "psci";
> @@ -54,6 +55,7 @@ CPU1: cpu@1 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x1>;
> +			clocks = <&cpufreq_hw 0>;
>  			capacity-dmips-mhz = <1024>;
>  			dynamic-power-coefficient = <100>;
>  			enable-method = "psci";
> @@ -65,6 +67,7 @@ CPU2: cpu@2 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x2>;
> +			clocks = <&cpufreq_hw 0>;
>  			capacity-dmips-mhz = <1024>;
>  			dynamic-power-coefficient = <100>;
>  			enable-method = "psci";
> @@ -76,6 +79,7 @@ CPU3: cpu@3 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x3>;
> +			clocks = <&cpufreq_hw 0>;
>  			capacity-dmips-mhz = <1024>;
>  			dynamic-power-coefficient = <100>;
>  			enable-method = "psci";
> @@ -87,6 +91,7 @@ CPU4: cpu@100 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x100>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			capacity-dmips-mhz = <1638>;
>  			dynamic-power-coefficient = <282>;
> @@ -102,6 +107,7 @@ CPU5: cpu@101 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x101>;
> +			clocks = <&cpufreq_hw 1>;
>  			capacity-dmips-mhz = <1638>;
>  			dynamic-power-coefficient = <282>;
>  			enable-method = "psci";
> @@ -113,6 +119,7 @@ CPU6: cpu@102 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x102>;
> +			clocks = <&cpufreq_hw 1>;
>  			capacity-dmips-mhz = <1638>;
>  			dynamic-power-coefficient = <282>;
>  			enable-method = "psci";
> @@ -124,6 +131,7 @@ CPU7: cpu@103 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo260";
>  			reg = <0x0 0x103>;
> +			clocks = <&cpufreq_hw 1>;
>  			capacity-dmips-mhz = <1638>;
>  			dynamic-power-coefficient = <282>;
>  			enable-method = "psci";
> @@ -2123,6 +2131,7 @@ cpufreq_hw: cpufreq@...1000 {
>  			clock-names = "xo", "alternate";
>  
>  			#freq-domain-cells = <1>;
> +			#clock-cells = <1>;
>  		};
>  	};
>