diff --git a/arch/arm64/boot/dts/renesas/r8a77970.dtsi b/arch/arm64/boot/dts/renesas/r8a77970.dtsi
index 4e0caae3c9d2..1007ee48adc3 100644
--- a/arch/arm64/boot/dts/renesas/r8a77970.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77970.dtsi
@@ -110,6 +110,16 @@ rwdt: watchdog@e6020000 {
 			status = "disabled";
 		};
 
+		swdt: watchdog@e6030000 {
+			compatible = "renesas,r8a77970-wdt", "renesas,rcar-gen3-wdt";
+			reg = <0 0xe6030000 0 0x0c>;
+			interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_CORE R8A77970_CLK_OSC>;
+			power-domains = <&sysc R8A77970_PD_ALWAYS_ON>;
+			resets = <&cpg 401>;
+			status = "disabled";
+		};
+
 		gpio0: gpio@e6050000 {
 			compatible = "renesas,gpio-r8a77970",
 				     "renesas,rcar-gen3-gpio";