linux-kernel - Re: [RESEND PATCH 07/12] arm64: dts: qcom: sc7180: Supply clock from cpufreq node to CPUs

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Message-ID: <375f611f-b5ba-363e-f8a2-32f3818db770@linaro.org>
Date:   Thu, 16 Feb 2023 11:38:34 +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 07/12] arm64: dts: qcom: sc7180: 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/sc7180.dtsi | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index ebfa21e9ed8a..53f0076f20f6 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -76,6 +76,7 @@ CPU0: cpu@0 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x0>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -103,6 +104,7 @@ CPU1: cpu@100 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x100>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -126,6 +128,7 @@ CPU2: cpu@200 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x200>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -149,6 +152,7 @@ CPU3: cpu@300 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x300>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -172,6 +176,7 @@ CPU4: cpu@400 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x400>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -195,6 +200,7 @@ CPU5: cpu@500 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x500>;
> +			clocks = <&cpufreq_hw 0>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
>  					   &LITTLE_CPU_SLEEP_1
> @@ -218,6 +224,7 @@ CPU6: cpu@600 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x600>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&BIG_CPU_SLEEP_0
>  					   &BIG_CPU_SLEEP_1
> @@ -241,6 +248,7 @@ CPU7: cpu@700 {
>  			device_type = "cpu";
>  			compatible = "qcom,kryo468";
>  			reg = <0x0 0x700>;
> +			clocks = <&cpufreq_hw 1>;
>  			enable-method = "psci";
>  			cpu-idle-states = <&BIG_CPU_SLEEP_0
>  					   &BIG_CPU_SLEEP_1
> @@ -3578,6 +3586,7 @@ cpufreq_hw: cpufreq@...23000 {
>  			clock-names = "xo", "alternate";
>  
>  			#freq-domain-cells = <1>;
> +			#clock-cells = <1>;
>  		};
>  
>  		wifi: wifi@...00000 {