linux-kernel - Re: [RESEND PATCH 04/12] arm64: dts: qcom: sm8550: Supply clock from cpufreq node to CPUs

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Message-ID: <0c7e3064-4ad0-949a-76a6-4da548892ce8@linaro.org>
Date:   Thu, 16 Feb 2023 11:36:18 +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 04/12] arm64: dts: qcom: sm8550: Supply clock from
 cpufreq node to CPUs



On 15.02.2023 08:03, 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/sm8550.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 9910006c32aa..21b4f668889d 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -68,6 +68,7 @@ CPU0: cpu@0 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_0>;
>  			power-domains = <&CPU_PD0>;
> @@ -91,6 +92,7 @@ CPU1: cpu@100 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x100>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_100>;
>  			power-domains = <&CPU_PD1>;
> @@ -110,6 +112,7 @@ CPU2: cpu@200 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x200>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_200>;
>  			power-domains = <&CPU_PD2>;
> @@ -129,6 +132,7 @@ CPU3: cpu@300 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x300>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_300>;
>  			power-domains = <&CPU_PD3>;
> @@ -148,6 +152,7 @@ CPU4: cpu@400 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x400>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_400>;
>  			power-domains = <&CPU_PD4>;
> @@ -167,6 +172,7 @@ CPU5: cpu@500 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x500>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_500>;
>  			power-domains = <&CPU_PD5>;
> @@ -186,6 +192,7 @@ CPU6: cpu@600 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x600>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_600>;
>  			power-domains = <&CPU_PD6>;
> @@ -205,6 +212,7 @@ CPU7: cpu@700 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo";
>  			reg = <0 0x700>;
> +			clocks = <&cpufreq_hw 2>;
>  			enable-method = "psci";
>  			next-level-cache = <&L2_700>;
>  			power-domains = <&CPU_PD7>;
> @@ -3341,6 +3349,7 @@ cpufreq_hw: cpufreq@...91000 {
>  				     <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
>  			interrupt-names = "dcvsh-irq-0", "dcvsh-irq-1", "dcvsh-irq-2";
>  			#freq-domain-cells = <1>;
> +			#clock-cells = <1>;
>  		};
>  
>  		pmu@...91000 {