diff --git a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
index 4d2760eb72a..ea392f9e415 100644
--- a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
+++ b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
@@ -11,6 +11,7 @@
 #include "mvebu-linkstation-fan.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/thermal/thermal.h>
 
 / {
 	model = "Buffalo LinkStation LS421DE";
@@ -40,10 +41,60 @@
 			  MBUS_ID(0x09, 0x01) 0 0xf1100000 0x10000>;
 	};
 
-	gpio_fan {
+	system_fan: gpio_fan {
 		gpios = <&gpio0 13 GPIO_ACTIVE_HIGH
 			 &gpio0 14 GPIO_ACTIVE_HIGH>;
 		alarm-gpios = <&gpio0 10 GPIO_ACTIVE_HIGH>;
+
+		#cooling-cells = <2>;
+	};
+
+	thermal-zones {
+		chassis-thermal {
+			polling-delay = <20000>;
+			polling-delay-passive = <2000>;
+
+			thermal-sensors = <&hdd0_temp>, <&hdd1_temp>;
+			coefficients = <1 1>;
+
+			trips {
+				chassis_alert1: chassis-alert1 {
+					temperature = <36000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				chassis_alert2: chassis-alert2 {
+					temperature = <46000>;
+					hysteresis = <2000>;
+					type = "active";
+				};
+				chassis_alert3: chassis-alert3 {
+					temperature = <56000>;
+					hysteresis = <2000>;
+					type = "passive";
+				};
+				chassis_crit: chassis-crit {
+					temperature = <66000>;
+					hysteresis = <2000>;
+					type = "critical";
+				};
+			};
+
+			cooling-maps {
+				map1 {
+					trip = <&chassis_alert1>;
+					cooling-device = <&system_fan THERMAL_NO_LIMIT 1>;
+				};
+				map2 {
+					trip = <&chassis_alert2>;
+					cooling-device = <&system_fan 2 2>;
+				};
+				map3 {
+					trip = <&chassis_alert3>;
+					cooling-device = <&system_fan 3 THERMAL_NO_LIMIT>;
+				};
+			};
+		};
 	};
 
 	gpio_keys {
@@ -225,6 +276,18 @@
 &sata {
 	nr-ports = <2>;
 	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	hdd0_temp: sata-port@0 {
+		reg = <0>;
+		#thermal-sensor-cells = <0>;
+	};
+
+	hdd1_temp: sata-port@1 {
+		reg = <1>;
+		#thermal-sensor-cells = <0>;
+	};
 };
 
 &sdio {
diff --git a/target/linux/mvebu/image/cortexa9.mk b/target/linux/mvebu/image/cortexa9.mk
index f01a76a9d3c..7f0a2fe6974 100644
--- a/target/linux/mvebu/image/cortexa9.mk
+++ b/target/linux/mvebu/image/cortexa9.mk
@@ -17,8 +17,9 @@ define Device/buffalo_ls421de
   KERNEL_INITRAMFS := kernel-bin | append-dtb | uImage none
   DEVICE_DTS := armada-370-buffalo-ls421de
   DEVICE_PACKAGES :=  \
-    kmod-rtc-rs5c372a kmod-hwmon-gpiofan kmod-usb3 kmod-md-raid0 \
-    kmod-md-raid1 kmod-md-mod kmod-fs-xfs mkf2fs e2fsprogs partx-utils
+    kmod-rtc-rs5c372a kmod-hwmon-gpiofan kmod-hwmon-drivetemp kmod-usb3 \
+    kmod-md-raid0 kmod-md-raid1 kmod-md-mod kmod-fs-xfs mkf2fs e2fsprogs \
+    partx-utils
 endef
 TARGET_DEVICES += buffalo_ls421de