diff --git a/dts/common/nordic/nrf54h20.dtsi b/dts/common/nordic/nrf54h20.dtsi
index 370b560bc0b..d601cbc3257 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 &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 &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 {