diff --git a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
index 62dd5baad70e665b82b58fe6ef78af993bba9b80..04fc368d828fb30d781d9cd6982d198525edf7f8 100644
--- a/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/sunxi-wdt.txt
@@ -2,8 +2,10 @@ Allwinner SoCs Watchdog timer
 
 Required properties:
 
-- compatible : should be either "allwinner,sun4i-a10-wdt" or
-               "allwinner,sun6i-a31-wdt"
+- compatible : should be one of
+	"allwinner,sun4i-a10-wdt"
+	"allwinner,sun6i-a31-wdt"
+	"allwinner,sun50i-a64-wdt","allwinner,sun6i-a31-wdt"
 - reg : Specifies base physical address and size of the registers.
 
 Example:
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 64e452a758fa424cd2072d8d642ede93c1d19651..8401e7f887ffd260d7fc698e66c8c65b01d5604d 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -665,5 +665,12 @@
 			#address-cells = <1>;
 			#size-cells = <0>;
 		};
+
+		wdt0: watchdog@1c20ca0 {
+			compatible = "allwinner,sun50i-a64-wdt",
+				     "allwinner,sun6i-a31-wdt";
+			reg = <0x01c20ca0 0x20>;
+			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+		};
 	};
 };