diff --git a/board/aarch64/dts/alder/alder.dtsi b/board/aarch64/dts/alder/alder.dtsi
index 63294287..3492dd37 100644
--- a/board/aarch64/dts/alder/alder.dtsi
+++ b/board/aarch64/dts/alder/alder.dtsi
@@ -624,3 +624,24 @@
 		};
 	};
 };
+
+/* Watchdog */
+
+&cp0_pinctrl {
+	watchdog_pins: watchdog-pins {
+		marvell,pins = WDT_TICKLE(MPP_ID);
+		marvell,function = "gpio";
+	};
+};
+
+/ {
+        sysmgmt-watchdog {
+                pinctrl-names = "default";
+                pinctrl-0 = <&watchdog_pins>;
+                compatible = "linux,wdt-gpio";
+                gpios = WDT_TICKLE(MPP_GPIO_REF);
+                always-running;
+                hw_algo = "toggle";
+                hw_margin_ms = <20000>; /* toggle period must be below 1 minute */
+        };
+};
diff --git a/board/aarch64/linux_defconfig b/board/aarch64/linux_defconfig
index 228a32c9..0b5c77ba 100644
--- a/board/aarch64/linux_defconfig
+++ b/board/aarch64/linux_defconfig
@@ -401,6 +401,7 @@ CONFIG_ARMADA_THERMAL=y
 CONFIG_WATCHDOG=y
 CONFIG_WATCHDOG_SYSFS=y
 CONFIG_SOFT_WATCHDOG=y
+CONFIG_GPIO_WATCHDOG=y
 CONFIG_ARMADA_37XX_WATCHDOG=y
 CONFIG_I6300ESB_WDT=y
 CONFIG_MFD_MAX77620=y