From 1789fb03882d88b946194ffe5c1912cad5539e8e Mon Sep 17 00:00:00 2001
From: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>
Date: Wed, 2 Oct 2024 10:39:56 +0200
Subject: [PATCH] [nrf fromlist] dts: arm: nordic: Add power states for
 nRF54H20

Add `idle` and `s2ram` power states for nRF54H20 cpuapp and cpurad.
Also the substate `idle_cache_disable` added.

Upstream PR: https://github.com/zephyrproject-rtos/zephyr/pull/79067

Signed-off-by: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>
---
 dts/common/nordic/nrf54h20.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/dts/common/nordic/nrf54h20.dtsi b/dts/common/nordic/nrf54h20.dtsi
index 370b560bc0b..56afa5a0e98 100644
--- a/dts/common/nordic/nrf54h20.dtsi
+++ b/dts/common/nordic/nrf54h20.dtsi
@@ -28,6 +28,7 @@
 			device_type = "cpu";
 			clocks = <&cpuapp_hsfll>;
 			clock-frequency = <DT_FREQ_M(320)>;
+			cpu-power-states = <&idle_cache_disabled &s2ram>;
 		};
 
 		cpurad: cpu@3 {
@@ -36,6 +37,7 @@
 			device_type = "cpu";
 			clocks = <&cpurad_hsfll>;
 			clock-frequency = <DT_FREQ_M(256)>;
+			cpu-power-states = <&idle_cache_disabled>;
 		};
 
 		cpuppr: cpu@d {
@@ -72,6 +74,22 @@
 				nordic,tasks-mask = <0xfffffff0>;
 			};
 		};
+
+		power-states {
+			// substate-id = <0>; is reserved for "idle", cache powered on
+			// substate-id = <1>; is reserved for "idle-cache-retained"
+			idle_cache_disabled: idle_cache_disabled {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-idle";
+				substate-id = <2>;
+				min-residency-us = <100000>;
+			};
+			s2ram: s2ram {
+				compatible = "zephyr,power-state";
+				power-state-name = "suspend-to-ram";
+				min-residency-us = <800000>;
+			};
+		};
 	};
 
 	reserved-memory {