[RFC] ARM: dts: mt8173: Add psci cpuidle support

[Howard Chen]

add device tree for psci-0.2 on mt8173 platform
add device tree for cupidle-arm64 on mt8173 platform

Signed-off-by: Howard Chen <howard.chen at linaro.org>
---
 arch/arm64/boot/dts/mt8173.dtsi | 51 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/arch/arm64/boot/dts/mt8173.dtsi b/arch/arm64/boot/dts/mt8173.dtsi
index 79b7e46..c5e1127 100644
--- a/arch/arm64/boot/dts/mt8173.dtsi
+++ b/arch/arm64/boot/dts/mt8173.dtsi
@@ -44,6 +44,11 @@
 		};
 	};
 
+	psci {
+		compatible = "arm,psci-0.2";
+		method = "smc";
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -54,6 +59,7 @@
 			reg = <0x000>;
 			enable-method = "mt-boot";
 			cpu-release-addr = <0x0 0x40000200>;
+			cpu-idle-states = <&CPU_SLEEP_1_0 &CLUSTER_SLEEP_1>;
 		};
 
 		cpu1: cpu at 1 {
@@ -62,6 +68,7 @@
 			reg = <0x001>;
 			enable-method = "mt-boot";
 			cpu-release-addr = <0x0 0x40000200>;
+			cpu-idle-states = <&CPU_SLEEP_1_0 &CLUSTER_SLEEP_1>;
 		};
 
 		cpu2: cpu at 2 {
@@ -70,6 +77,7 @@
 			reg = <0x100>;
 			enable-method = "mt-boot";
 			cpu-release-addr = <0x0 0x40000200>;
+			cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
 		};
 
 		cpu3: cpu at 3 {
@@ -78,8 +86,51 @@
 			reg = <0x101>;
 			enable-method = "mt-boot";
 			cpu-release-addr = <0x0 0x40000200>;
+			cpu-idle-states = <&CPU_SLEEP_0_0 &CLUSTER_SLEEP_0>;
 		};
 
+		idle-states {
+			entry-method = "arm,psci-0.2";
+
+			CPU_SLEEP_0_0: cpu-sleep-0-0 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x0010000>;
+				entry-latency-us = <250>;
+				exit-latency-us = <500>;
+				min-residency-us = <950>;
+			};
+
+			CLUSTER_SLEEP_0: cluster-sleep-0 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x1010000>;
+				entry-latency-us = <600>;
+				exit-latency-us = <1100>;
+				min-residency-us = <2700>;
+				wakeup-latency-us = <1500>;
+			};
+
+			CPU_SLEEP_1_0: cpu-sleep-1-0 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x0010000>;
+				entry-latency-us = <70>;
+				exit-latency-us = <100>;
+				min-residency-us = <300>;
+				wakeup-latency-us = <150>;
+			};
+
+			CLUSTER_SLEEP_1: cluster-sleep-1 {
+				compatible = "arm,idle-state";
+				local-timer-stop;
+				arm,psci-suspend-param = <0x1010000>;
+				entry-latency-us = <500>;
+				exit-latency-us = <1200>;
+				min-residency-us = <3500>;
+				wakeup-latency-us = <1300>;
+			};
+		};
 	};
 
 	clocks {
-- 
1.9.1