diff --git a/arch/arm64/boot/dts/apm/apm-merlin.dts b/arch/arm64/boot/dts/apm/apm-merlin.dts
index b1160780a2a6..4ec05886dd41 100644
--- a/arch/arm64/boot/dts/apm/apm-merlin.dts
+++ b/arch/arm64/boot/dts/apm/apm-merlin.dts
@@ -38,6 +38,7 @@ poweroff_mbox: poweroff_mbox@10548000 {
 
 	poweroff: poweroff@10548010 {
 		compatible = "syscon-poweroff";
+		reg = <0x0 0x10548010 0x0 0x4>;
 		regmap = <&poweroff_mbox>;
 		offset = <0x10>;
 		mask = <0x1>;
diff --git a/arch/arm64/boot/dts/apm/apm-mustang.dts b/arch/arm64/boot/dts/apm/apm-mustang.dts
index 2ef658796746..8f7eeba56dc4 100644
--- a/arch/arm64/boot/dts/apm/apm-mustang.dts
+++ b/arch/arm64/boot/dts/apm/apm-mustang.dts
@@ -38,6 +38,7 @@ poweroff_mbox: poweroff_mbox@10548000 {
 
 	poweroff: poweroff@10548010 {
 		compatible = "syscon-poweroff";
+		reg = <0x0 0x10548010 0x0 0x4>;
 		regmap = <&poweroff_mbox>;
 		offset = <0x10>;
 		mask = <0x1>;
diff --git a/arch/arm64/boot/dts/apm/apm-shadowcat.dtsi b/arch/arm64/boot/dts/apm/apm-shadowcat.dtsi
index 95281268fb7f..e930f2f26f4b 100644
--- a/arch/arm64/boot/dts/apm/apm-shadowcat.dtsi
+++ b/arch/arm64/boot/dts/apm/apm-shadowcat.dtsi
@@ -417,6 +417,7 @@ scu: system-clk-controller@17000000 {
 
 		reboot: reboot@17000014 {
 			compatible = "syscon-reboot";
+			reg = <0x0 0x17000014 0x0 0x4>;
 			regmap = <&scu>;
 			offset = <0x14>;
 			mask = <0x1>;
diff --git a/arch/arm64/boot/dts/apm/apm-storm.dtsi b/arch/arm64/boot/dts/apm/apm-storm.dtsi
index 85ad18b63038..3bb59704fcb2 100644
--- a/arch/arm64/boot/dts/apm/apm-storm.dtsi
+++ b/arch/arm64/boot/dts/apm/apm-storm.dtsi
@@ -462,6 +462,7 @@ scu: system-clk-controller@17000000 {
 
 		reboot: reboot@17000014 {
 			compatible = "syscon-reboot";
+			reg = <0x0 0x17000014 0x0 0x4>;
 			regmap = <&scu>;
 			offset = <0x14>;
 			mask = <0x1>;