linux-kernel - Re: [PATCH 3/4] arm64: dts: qcom: x1e80100: Add missing system-wide PSCI power domain

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Date: Wed, 3 Jan 2024 01:33:32 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Georgi Djakov <djakov@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Rajendra Nayak <quic_rjendra@...cinc.com>,
	Sibi Sankar <quic_sibis@...cinc.com>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 3/4] arm64: dts: qcom: x1e80100: Add missing system-wide
 PSCI power domain

On 24-01-02 19:29:49, Konrad Dybcio wrote:
> Previous Qualcomm SoCs over the past couple years have used the Arm DSU
> architecture, which basically unified the meaning of the "cluster" and
> "system". This is however clearly not the case on X1E, as can be seen
> by three separate cluster power domains.
> 
> Add the lacking system-level power domain. For now it's going to be
> always-on, as no system-wide idle states are defined at the moment.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Reviewed-by: Abel Vesa <abel.vesa@...aro.org>

> ---
>  arch/arm64/boot/dts/qcom/x1e80100.dtsi | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> index 6f75fc342ceb..fc164b9b3ef1 100644
> --- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> +++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
> @@ -395,16 +395,24 @@ CPU_PD11: power-domain-cpu11 {
>  		CLUSTER_PD0: power-domain-cpu-cluster0 {
>  			#power-domain-cells = <0>;
>  			domain-idle-states = <&CLUSTER_CL4>, <&CLUSTER_CL5>;
> +			power-domains = <&SYSTEM_PD>;
>  		};
>  
>  		CLUSTER_PD1: power-domain-cpu-cluster1 {
>  			#power-domain-cells = <0>;
>  			domain-idle-states = <&CLUSTER_CL4>, <&CLUSTER_CL5>;
> +			power-domains = <&SYSTEM_PD>;
>  		};
>  
>  		CLUSTER_PD2: power-domain-cpu-cluster2 {
>  			#power-domain-cells = <0>;
>  			domain-idle-states = <&CLUSTER_CL4>, <&CLUSTER_CL5>;
> +			power-domains = <&SYSTEM_PD>;
> +		};
> +
> +		SYSTEM_PD: power-domain-system {
> +			#power-domain-cells = <0>;
> +			/* TODO: system-wide idle states */
>  		};
>  	};
>  
> 
> -- 
> 2.43.0
>