[PATCH 3/3] arm64: dts: ti: k3-am62p5: add standby cpu idle state

Allow the A53 cores to enter standby mode on the AM62PX SoC.
The standby idle state enables the CPU cores to enter WFI through the
CPUIdle framework.

Signed-off-by: Kendall Willis <[email protected]>
---
 arch/arm64/boot/dts/ti/k3-am62p5.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62p5.dtsi b/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
index 8982a7b9f1a6a1d1a0eebe9342fdfa5d46245159..74a588e94e22a9addb44b2df495d5a8ed75967d4 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p5.dtsi
@@ -50,6 +50,7 @@ cpu0: cpu@0 {
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 135 0>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_STANDBY>;
 		};
 
 		cpu1: cpu@1 {
@@ -67,6 +68,7 @@ cpu1: cpu@1 {
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 136 0>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_STANDBY>;
 		};
 
 		cpu2: cpu@2 {
@@ -84,6 +86,7 @@ cpu2: cpu@2 {
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 137 0>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_STANDBY>;
 		};
 
 		cpu3: cpu@3 {
@@ -101,6 +104,20 @@ cpu3: cpu@3 {
 			operating-points-v2 = <&a53_opp_table>;
 			clocks = <&k3_clks 138 0>;
 			#cooling-cells = <2>;
+			cpu-idle-states = <&CPU_STANDBY>;
+		};
+
+		cpu_idle_states: idle-states {
+			entry-method = "psci";
+
+			CPU_STANDBY: cpu-standby {
+				compatible = "arm,idle-state";
+				entry-latency-us = <100>;
+				exit-latency-us = <50>;
+				idle-state-name = "standby";
+				min-residency-us = <500>;
+				arm,psci-suspend-param = <0x00000001>;
+			};
 		};
 	};
 

-- 
2.34.1