diff --git a/dts/vendor/nordic/nrf54lm20a.dtsi b/dts/vendor/nordic/nrf54lm20a.dtsi
index d673ae94e50..d1e6d1b0d28 100644
--- a/dts/vendor/nordic/nrf54lm20a.dtsi
+++ b/dts/vendor/nordic/nrf54lm20a.dtsi
@@ -800,19 +800,19 @@
 				#address-cells = <1>;
 				#size-cells = <1>;
 
-				gpregret1: gpregret1@51c {
+				gpregret1: gpregret1@500 {
 					#address-cells = <1>;
 					#size-cells = <1>;
 					compatible = "nordic,nrf-gpregret";
-					reg = <0x51c 0x1>;
+					reg = <0x500 0x1>;
 					status = "disabled";
 				};
 
-				gpregret2: gpregret2@520 {
+				gpregret2: gpregret2@504 {
 					#address-cells = <1>;
 					#size-cells = <1>;
 					compatible = "nordic,nrf-gpregret";
-					reg = <0x520 0x1>;
+					reg = <0x504 0x1>;
 					status = "disabled";
 				};
 			};
diff --git a/soc/nordic/validate_base_addresses.c b/soc/nordic/validate_base_addresses.c
index f3c9c8bf214..7426364417f 100644
--- a/soc/nordic/validate_base_addresses.c
+++ b/soc/nordic/validate_base_addresses.c
@@ -73,13 +73,19 @@
 #define NRF_WDT0 NRF_WDT
 #endif
 
+#if !defined(NRF_POWER_GPREGRET1) && defined(NRF_POWER)
 #if defined(CONFIG_SOC_SERIES_NRF51X) || defined(CONFIG_SOC_SERIES_NRF52X)
-#if !defined(NRF_POWER_GPREGRET1) && defined(NRF_POWER_BASE)
-#define NRF_POWER_GPREGRET1 (0x51c + NRF_POWER_BASE)
+#define NRF_POWER_GPREGRET1 (&NRF_POWER->GPREGRET)
+#else
+#define NRF_POWER_GPREGRET1 (&NRF_POWER->GPREGRET[0])
+#endif
 #endif
 
-#if !defined(NRF_POWER_GPREGRET2) && defined(NRF_POWER_BASE)
-#define NRF_POWER_GPREGRET2 (0x520 + NRF_POWER_BASE)
+#if !defined(NRF_POWER_GPREGRET2) && defined(NRF_POWER)
+#if defined(CONFIG_SOC_SERIES_NRF51X) || defined(CONFIG_SOC_SERIES_NRF52X)
+#define NRF_POWER_GPREGRET2 (&NRF_POWER->GPREGRET2)
+#else
+#define NRF_POWER_GPREGRET2 (&NRF_POWER->GPREGRET[1])
 #endif
 #endif
 
@@ -367,9 +373,5 @@ CHECK_DT_REG(cpurad_wdt010, NRF_RADIOCORE_WDT010);
 CHECK_DT_REG(cpurad_wdt011, NRF_RADIOCORE_WDT011);
 CHECK_DT_REG(wdt131, NRF_WDT131);
 CHECK_DT_REG(wdt132, NRF_WDT132);
-
-/* nRF51/nRF52-specific addresses */
-#if defined(CONFIG_SOC_SERIES_NRF51X) || defined(CONFIG_SOC_SERIES_NRF52X)
 CHECK_DT_REG(gpregret1, NRF_POWER_GPREGRET1);
 CHECK_DT_REG(gpregret2, NRF_POWER_GPREGRET2);
-#endif