[nrf fromlist] dts: arm: nordic: Add power states for nRF54H20

Upstream PR #: 79067

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

Signed-off-by: Adam Kondraciuk <[email protected]>
(cherry picked from commit 19a2be222d94985e349766a1e1ba7264d6d2bc0a)

Author: adamkondraciuk

dts/common/nordic/nrf54h20.dtsi

@@ -30,7 +30,7 @@
 			device_type = "cpu";
 			clocks = <&cpuapp_hsfll>;
 			clock-frequency = <DT_FREQ_M(320)>;
-			cpu-power-states = <&idle &s2ram>;
+			cpu-power-states = <&idle_cache_disabled &s2ram>;
 		};
 
 		cpurad: cpu@3 {
@@ -39,6 +39,7 @@
 			device_type = "cpu";
 			clocks = <&cpurad_hsfll>;
 			clock-frequency = <DT_FREQ_M(256)>;
+			cpu-power-states = <&idle_cache_disabled>;
 		};
 
 		cpuppr: cpu@d {
@@ -127,12 +128,14 @@
 		};
 
 		power-states {
-			idle: idle {
+			// 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";

soc/nordic/nrf54h/power.c

@@ -68,7 +68,7 @@ void nrf_poweroff(void)
 	nrf_resetinfo_resetreas_local_set(NRF_RESETINFO, 0);
 	nrf_resetinfo_restore_valid_set(NRF_RESETINFO, false);
 
-#if !defined(CONFIG_SOC_NRF54H20_CPURAD)
+#if !defined(NRF_RADIOCORE)
 	/* Disable retention */
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_MAIN, false);
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
@@ -98,7 +98,7 @@ static void s2idle_enter(uint8_t substate_id)
 	case 1: /* Substate for idle with cache retained - not implemented yet. */
 		break;
 	case 2: /* Substate for idle with cache disabled. */
-#if !defined(CONFIG_SOC_NRF54H20_CPURAD)
+#if !defined(NRF_RADIOCORE)
 		soc_lrcconf_poweron_request(node, NRF_LRCCONF_POWER_MAIN);
 #endif
 		common_suspend();
@@ -127,7 +127,7 @@ static void s2idle_exit(uint8_t substate_id)
 		break;
 	case 2: /* Substate for idle with cache disabled. */
 		common_resume();
-#if !defined(CONFIG_SOC_NRF54H20_CPURAD)
+#if !defined(NRF_RADIOCORE)
 		soc_lrcconf_poweron_release(node, NRF_LRCCONF_POWER_MAIN);
 #endif
 	default: /* Unknown substate. */
@@ -140,7 +140,7 @@ static void s2idle_exit(uint8_t substate_id)
 static void s2ram_exit(void)
 {
 	common_resume();
-#if !defined(CONFIG_SOC_NRF54H20_CPURAD)
+#if !defined(NRF_RADIOCORE)
 	/* Re-enable domain retention. */
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, true);
 #endif
@@ -156,7 +156,7 @@ static int sys_suspend_to_ram(void)
 					  NRF_RESETINFO_RESETREAS_LOCAL_UNRETAINED_MASK);
 	nrf_resetinfo_restore_valid_set(NRF_RESETINFO, true);
 
-#if !defined(CONFIG_SOC_NRF54H20_CPURAD)
+#if !defined(NRF_RADIOCORE)
 	/* Disable retention */
 	nrf_lrcconf_retain_set(NRF_LRCCONF010, NRF_LRCCONF_POWER_DOMAIN_0, false);
 #endif