arm64: dts: qcom: sc7280: Add cpuidle states

Add cpuidle states for little and big cpus.
The latency values are preliminary placeholders and will be updated
once testing provides the real numbers.
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/1615461961-17716-14-git-send-email-rnayak@codeaurora.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sc7280.dtsi

@@ -63,6 +63,9 @@ CPU0: cpu@0 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x0>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+					   &LITTLE_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_0>;
 			L2_0: l2-cache {
 				compatible = "cache";
@@ -78,6 +81,9 @@ CPU1: cpu@100 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x100>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+					   &LITTLE_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_100>;
 			L2_100: l2-cache {
 				compatible = "cache";
@@ -90,6 +96,9 @@ CPU2: cpu@200 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x200>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+					   &LITTLE_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_200>;
 			L2_200: l2-cache {
 				compatible = "cache";
@@ -102,6 +111,9 @@ CPU3: cpu@300 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x300>;
 			enable-method = "psci";
+			cpu-idle-states = <&LITTLE_CPU_SLEEP_0
+					   &LITTLE_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_300>;
 			L2_300: l2-cache {
 				compatible = "cache";
@@ -114,6 +126,9 @@ CPU4: cpu@400 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x400>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_SLEEP_0
+					   &BIG_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_400>;
 			L2_400: l2-cache {
 				compatible = "cache";
@@ -126,6 +141,9 @@ CPU5: cpu@500 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x500>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_SLEEP_0
+					   &BIG_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_500>;
 			L2_500: l2-cache {
 				compatible = "cache";
@@ -138,6 +156,9 @@ CPU6: cpu@600 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x600>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_SLEEP_0
+					   &BIG_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_600>;
 			L2_600: l2-cache {
 				compatible = "cache";
@@ -150,12 +171,69 @@ CPU7: cpu@700 {
 			compatible = "arm,kryo";
 			reg = <0x0 0x700>;
 			enable-method = "psci";
+			cpu-idle-states = <&BIG_CPU_SLEEP_0
+					   &BIG_CPU_SLEEP_1
+					   &CLUSTER_SLEEP_0>;
 			next-level-cache = <&L2_700>;
 			L2_700: l2-cache {
 				compatible = "cache";
 				next-level-cache = <&L3_0>;
 			};
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			LITTLE_CPU_SLEEP_0: cpu-sleep-0-0 {
+				compatible = "arm,idle-state";
+				idle-state-name = "little-power-down";
+				arm,psci-suspend-param = <0x40000003>;
+				entry-latency-us = <549>;
+				exit-latency-us = <901>;
+				min-residency-us = <1774>;
+				local-timer-stop;
+			};
+
+			LITTLE_CPU_SLEEP_1: cpu-sleep-0-1 {
+				compatible = "arm,idle-state";
+				idle-state-name = "little-rail-power-down";
+				arm,psci-suspend-param = <0x40000004>;
+				entry-latency-us = <702>;
+				exit-latency-us = <915>;
+				min-residency-us = <4001>;
+				local-timer-stop;
+			};
+
+			BIG_CPU_SLEEP_0: cpu-sleep-1-0 {
+				compatible = "arm,idle-state";
+				idle-state-name = "big-power-down";
+				arm,psci-suspend-param = <0x40000003>;
+				entry-latency-us = <523>;
+				exit-latency-us = <1244>;
+				min-residency-us = <2207>;
+				local-timer-stop;
+			};
+
+			BIG_CPU_SLEEP_1: cpu-sleep-1-1 {
+				compatible = "arm,idle-state";
+				idle-state-name = "big-rail-power-down";
+				arm,psci-suspend-param = <0x40000004>;
+				entry-latency-us = <526>;
+				exit-latency-us = <1854>;
+				min-residency-us = <5555>;
+				local-timer-stop;
+			};
+
+			CLUSTER_SLEEP_0: cluster-sleep-0 {
+				compatible = "arm,idle-state";
+				idle-state-name = "cluster-power-down";
+				arm,psci-suspend-param = <0x40003444>;
+				entry-latency-us = <3263>;
+				exit-latency-us = <6562>;
+				min-residency-us = <9926>;
+				local-timer-stop;
+			};
+		};
 	};
 
 	memory@80000000 {