linux-kernel - [PATCHv1 7/8] arm64: dts: qcom: msm8998: Add PSCI cpuidle low power states

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Date:   Fri, 10 May 2019 16:59:45 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        bjorn.andersson@...aro.org, andy.gross@...aro.org,
        David Brown <david.brown@...aro.org>,
        Li Yang <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>
Cc:     Marc Gonzalez <marc.w.gonzalez@...e.fr>, devicetree@...r.kernel.org
Subject: [PATCHv1 7/8] arm64: dts: qcom: msm8998: Add PSCI cpuidle low power states

Add device bindings for cpuidle states for cpu devices.

Cc: Marc Gonzalez <marc.w.gonzalez@...e.fr>
Signed-off-by: Amit Kucheria <amit.kucheria@...aro.org>
---
 arch/arm64/boot/dts/qcom/msm8998.dtsi | 32 +++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
index 3fd0769fe648..208281f318e2 100644
--- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
@@ -78,6 +78,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x0>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_PD>;
 			efficiency = <1024>;
 			next-level-cache = <&L2_0>;
 			L2_0: l2-cache {
@@ -97,6 +98,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x1>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_PD>;
 			efficiency = <1024>;
 			next-level-cache = <&L2_0>;
 			L1_I_1: l1-icache {
@@ -112,6 +114,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x2>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_PD>;
 			efficiency = <1024>;
 			next-level-cache = <&L2_0>;
 			L1_I_2: l1-icache {
@@ -127,6 +130,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x3>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_PD>;
 			efficiency = <1024>;
 			next-level-cache = <&L2_0>;
 			L1_I_3: l1-icache {
@@ -142,6 +146,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x100>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_PD>;
 			efficiency = <1536>;
 			next-level-cache = <&L2_1>;
 			L2_1: l2-cache {
@@ -161,6 +166,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x101>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_PD>;
 			efficiency = <1536>;
 			next-level-cache = <&L2_1>;
 			L1_I_101: l1-icache {
@@ -176,6 +182,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x102>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_PD>;
 			efficiency = <1536>;
 			next-level-cache = <&L2_1>;
 			L1_I_102: l1-icache {
@@ -191,6 +198,7 @@
 			compatible = "arm,armv8";
 			reg = <0x0 0x103>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_PD>;
 			efficiency = <1536>;
 			next-level-cache = <&L2_1>;
 			L1_I_103: l1-icache {
@@ -238,6 +246,30 @@
 				};
 			};
 		};
+
+		idle-states {
+			entry-method="psci";
+
+			LITTLE_CPU_PD: little-power-down {
+				compatible = "arm,idle-state";
+				idle-state-name = "little-power-down";
+				arm,psci-suspend-param = <0x00000002>;
+				entry-latency-us = <43>;
+				exit-latency-us = <43>;
+				min-residency-us = <200>;
+				local-timer-stop;
+			};
+
+			BIG_CPU_PD: big-power-down {
+				compatible = "arm,idle-state";
+				idle-state-name = "big-power-down";
+				arm,psci-suspend-param = <0x00000002>;
+				entry-latency-us = <41>;
+				exit-latency-us = <41>;
+				min-residency-us = <200>;
+				local-timer-stop;
+			};
+		};
 	};
 
 	firmware {
-- 
2.17.1