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

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Date: Tue, 02 Jan 2024 19:29:49 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: 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>, Abel Vesa <abel.vesa@...aro.org>
Cc: 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, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 3/4] arm64: dts: qcom: x1e80100: Add missing system-wide
 PSCI power domain

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>
---
 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