[PATCH 04/10] arm64: dts: imx8ulp: add cpuidle node

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

Add cpuidle node and enable cpuidle for dual cores. The HW mode in
Arm Trusted Firmware is SoC Application Power Domain Sleep mode.

Signed-off-by: Jacky Bai <ping.bai at nxp.com>
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 arch/arm64/boot/dts/freescale/imx8ulp.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
index fd30475a561d..16906c20bce9 100644
--- a/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8ulp.dtsi
@@ -40,6 +40,7 @@ A35_0: cpu at 0 {
 			reg = <0x0 0x0>;
 			enable-method = "psci";
 			next-level-cache = <&A35_L2>;
+			cpu-idle-states = <&cpu_sleep>;
 		};
 
 		A35_1: cpu at 1 {
@@ -48,6 +49,7 @@ A35_1: cpu at 1 {
 			reg = <0x0 0x1>;
 			enable-method = "psci";
 			next-level-cache = <&A35_L2>;
+			cpu-idle-states = <&cpu_sleep>;
 		};
 
 		A35_L2: l2-cache0 {
@@ -55,6 +57,19 @@ A35_L2: l2-cache0 {
 			cache-level = <2>;
 			cache-unified;
 		};
+
+		idle-states {
+			entry-method = "psci";
+
+			cpu_sleep: cpu-sleep {
+				compatible = "arm,idle-state";
+				arm,psci-suspend-param = <0x0>;
+				local-timer-stop;
+				entry-latency-us = <1000>;
+				exit-latency-us = <700>;
+				min-residency-us = <2700>;
+			};
+		};
 	};
 
 	gic: interrupt-controller at 2d400000 {
-- 
2.37.1