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

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Message-Id: <20230619-topic-sc8280xp-idle-v1-1-35a8b98451d0@linaro.org>
Date:   Mon, 19 Jun 2023 18:18:53 +0200
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 RFC 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 ac0596dfdbc4..d524f851cb53 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -285,7 +285,23 @@ BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
 		};
 
 		domain-idle-states {
-			CLUSTER_SLEEP_0: cluster-sleep-0 {
+			CLUSTER_SLEEP_L3_PC: 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_APSS_OFF: cluster-sleep-2 {
 				compatible = "domain-idle-state";
 				arm,psci-suspend-param = <0x4100c344>;
 				entry-latency-us = <3263>;
@@ -632,7 +648,7 @@ 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_L3_PC &CLUSTER_SLEEP_CX_OFF &CLUSTER_SLEEP_APSS_OFF>;
 		};
 	};
 

-- 
2.41.0