[PATCH] arm64: dts: mt8192: Add cpu-idle-states

[James Liao]

Add idle states for cpu-off and cluster-off.

Signed-off-by: James Liao <jamesjj.liao at mediatek.com>
---
 arch/arm64/boot/dts/mediatek/mt8192.dtsi | 44 ++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

This patch bases on v5.10 and [1], adds idle-states for MT8192 CPUs.

[1] https://lore.kernel.org/linux-arm-kernel/20201030092207.26488-2-seiya.wang@mediatek.com/

diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
index e12e024de122..c7f2ec9ea4f1 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
@@ -39,6 +39,7 @@
 			reg = <0x000>;
 			enable-method = "psci";
 			clock-frequency = <1701000000>;
+			cpu-idle-states = <&cpuoff_l &clusteroff_l>;
 			next-level-cache = <&l2_0>;
 			capacity-dmips-mhz = <530>;
 		};
@@ -49,6 +50,7 @@
 			reg = <0x100>;
 			enable-method = "psci";
 			clock-frequency = <1701000000>;
+			cpu-idle-states = <&cpuoff_l &clusteroff_l>;
 			next-level-cache = <&l2_0>;
 			capacity-dmips-mhz = <530>;
 		};
@@ -59,6 +61,7 @@
 			reg = <0x200>;
 			enable-method = "psci";
 			clock-frequency = <1701000000>;
+			cpu-idle-states = <&cpuoff_l &clusteroff_l>;
 			next-level-cache = <&l2_0>;
 			capacity-dmips-mhz = <530>;
 		};
@@ -69,6 +72,7 @@
 			reg = <0x300>;
 			enable-method = "psci";
 			clock-frequency = <1701000000>;
+			cpu-idle-states = <&cpuoff_l &clusteroff_l>;
 			next-level-cache = <&l2_0>;
 			capacity-dmips-mhz = <530>;
 		};
@@ -79,6 +83,7 @@
 			reg = <0x400>;
 			enable-method = "psci";
 			clock-frequency = <2171000000>;
+			cpu-idle-states = <&cpuoff_b &clusteroff_b>;
 			next-level-cache = <&l2_1>;
 			capacity-dmips-mhz = <1024>;
 		};
@@ -89,6 +94,7 @@
 			reg = <0x500>;
 			enable-method = "psci";
 			clock-frequency = <2171000000>;
+			cpu-idle-states = <&cpuoff_b &clusteroff_b>;
 			next-level-cache = <&l2_1>;
 			capacity-dmips-mhz = <1024>;
 		};
@@ -99,6 +105,7 @@
 			reg = <0x600>;
 			enable-method = "psci";
 			clock-frequency = <2171000000>;
+			cpu-idle-states = <&cpuoff_b &clusteroff_b>;
 			next-level-cache = <&l2_1>;
 			capacity-dmips-mhz = <1024>;
 		};
@@ -109,6 +116,7 @@
 			reg = <0x700>;
 			enable-method = "psci";
 			clock-frequency = <2171000000>;
+			cpu-idle-states = <&cpuoff_b &clusteroff_b>;
 			next-level-cache = <&l2_1>;
 			capacity-dmips-mhz = <1024>;
 		};
@@ -158,6 +166,42 @@
 		l3_0: l3-cache {
 			compatible = "cache";
 		};
+
+		idle-states {
+			entry-method = "arm,psci";
+			cpuoff_l: cpuoff_l {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x00010001>;
+				local-timer-stop;
+				entry-latency-us = <55>;
+				exit-latency-us = <140>;
+				min-residency-us = <780>;
+			};
+			cpuoff_b: cpuoff_b {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x00010001>;
+				local-timer-stop;
+				entry-latency-us = <35>;
+				exit-latency-us = <145>;
+				min-residency-us = <720>;
+			};
+			clusteroff_l: clusteroff_l {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x01010002>;
+				local-timer-stop;
+				entry-latency-us = <60>;
+				exit-latency-us = <155>;
+				min-residency-us = <860>;
+			};
+			clusteroff_b: clusteroff_b {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x01010002>;
+				local-timer-stop;
+				entry-latency-us = <40>;
+				exit-latency-us = <155>;
+				min-residency-us = <780>;
+			};
+		};
 	};
 
 	pmu-a55 {
-- 
2.18.0