linux-kernel - [PATCH RFT v2 1/3] arm64: dts: qcom: sc8280xp: Add lower cluster idle states

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Message-Id: <20230619-topic-sc8280xp-idle-v2-1-cde50bf02f3c@linaro.org>
Date: Wed, 20 Dec 2023 23:12:54 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Andy Gross <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Johan Hovold <johan+linaro@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Konrad Dybcio <konrad.dybcio@...ainline.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH RFT v2 1/3] arm64: dts: qcom: sc8280xp: Add lower cluster
 idle states

Apart from a total LLCC + APSS power collapse, SC8280XP can also put
either the DSU rail (CPU + L3), or VDD_CX in power collapse.

Add support for these lower idle states to allow more flexibility.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index febf28356ff8..ca56bbac4353 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -286,7 +286,23 @@ BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
 		};
 
 		domain-idle-states {
-			CLUSTER_SLEEP_0: cluster-sleep-0 {
+			CLUSTER_SLEEP_APSS_OFF: cluster-sleep-0 {
+				compatible = "domain-idle-state";
+				arm,psci-suspend-param = <0x41000044>;
+				entry-latency-us = <2752>;
+				exit-latency-us = <3048>;
+				min-residency-us = <6118>;
+			};
+
+			CLUSTER_SLEEP_CX_OFF: cluster-sleep-1 {
+				compatible = "domain-idle-state";
+				arm,psci-suspend-param = <0x41002344>;
+				entry-latency-us = <3263>;
+				exit-latency-us = <4562>;
+				min-residency-us = <8467>;
+			};
+
+			CLUSTER_SLEEP_AOSS_SLEEP: cluster-sleep-2 {
 				compatible = "domain-idle-state";
 				arm,psci-suspend-param = <0x4100c344>;
 				entry-latency-us = <3263>;
@@ -634,7 +650,7 @@ CPU_PD7: power-domain-cpu7 {
 
 		CLUSTER_PD: power-domain-cpu-cluster0 {
 			#power-domain-cells = <0>;
-			domain-idle-states = <&CLUSTER_SLEEP_0>;
+			domain-idle-states = <&CLUSTER_SLEEP_APSS_OFF &CLUSTER_SLEEP_CX_OFF &CLUSTER_SLEEP_AOSS_SLEEP>;
 		};
 	};
 

-- 
2.43.0