diff --git a/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts b/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts
new file mode 100644
index 0000000000..15c46cb5f7
--- /dev/null
+++ b/target/linux/ramips/dts/mt7621_dlink_dir-878-a1.dts
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/dts-v1/;
+
+#include "mt7621.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/ {
+	compatible = "dlink,dir-878-a1", "mediatek,mt7621-soc";
+	model = "D-Link DIR-878 A1";
+
+	aliases {
+		led-boot = &led_power_orange;
+		led-failsafe = &led_power_green;
+		led-running = &led_power_green;
+		led-upgrade = &led_net_orange;
+		label-mac-device = &gmac0;
+	};
+
+	chosen {
+		bootargs = "console=ttyS0,57600";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led_power_orange: power_orange {
+			label = "dir-878-a1:orange:power";
+			gpios = <&gpio 8 GPIO_ACTIVE_LOW>;
+		};
+
+		led_power_green: power_green {
+			label = "dir-878-a1:green:power";
+			gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
+		};
+
+		led_net_orange: net_orange {
+			label = "dir-878-a1:orange:net";
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+
+		net_green {
+			label = "dir-878-a1:green:net";
+			gpios = <&gpio 3 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		reset {
+			label = "reset";
+			gpios = <&gpio 15 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RESTART>;
+		};
+
+		wps {
+			label = "wps";
+			gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_WPS_BUTTON>;
+		};
+
+		wifi {
+			label = "wifi";
+			gpios = <&gpio 7 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_RFKILL>;
+		};
+	};
+};
+
+&spi0 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x30000>;
+				read-only;
+			};
+
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x30000 0x10000>;
+				read-only;
+			};
+
+			factory: partition@40000 {
+				label = "factory";
+				reg = <0x40000 0x20000>;
+				read-only;
+			};
+
+			partition@60000 {
+				compatible = "sge,uimage";
+				label = "firmware";
+				reg = <0x60000 0xfa0000>;
+			};
+		};
+	};
+};
+
+&pcie {
+	status = "okay";
+};
+
+&pcie0 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x0000>;
+		ieee80211-freq-limit = <2400000 2500000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&pcie1 {
+	wifi@0,0 {
+		compatible = "mediatek,mt76";
+		reg = <0x0000 0 0 0 0>;
+		mediatek,mtd-eeprom = <&factory 0x8000>;
+		ieee80211-freq-limit = <5000000 6000000>;
+
+		led {
+			led-active-low;
+		};
+	};
+};
+
+&gmac0 {
+	mtd-mac-address = <&factory 0xe000>;
+};
+
+&switch0 {
+	ports {
+		port@0 {
+			status = "okay";
+			label = "lan4";
+		};
+
+		port@1 {
+			status = "okay";
+			label = "lan3";
+		};
+
+		port@2 {
+			status = "okay";
+			label = "lan2";
+		};
+
+		port@3 {
+			status = "okay";
+			label = "lan1";
+		};
+
+		port@4 {
+			status = "okay";
+			label = "wan";
+			mtd-mac-address = <&factory 0xe006>;
+		};
+	};
+};
+
+&state_default {
+	gpio {
+		groups = "i2c", "uart3", "jtag", "wdt";
+		function = "gpio";
+	};
+};
diff --git a/target/linux/ramips/image/mt7621.mk b/target/linux/ramips/image/mt7621.mk
index 9e5bd811b0..48561d5ff9 100644
--- a/target/linux/ramips/image/mt7621.mk
+++ b/target/linux/ramips/image/mt7621.mk
@@ -236,6 +236,21 @@ define Device/dlink_dir-860l-b1
 endef
 TARGET_DEVICES += dlink_dir-860l-b1
 
+define Device/dlink_dir-878-a1
+  IMAGE_SIZE := 16000k
+  DEVICE_VENDOR := D-Link
+  DEVICE_MODEL := DIR-878
+  DEVICE_VARIANT := A1
+  DEVICE_PACKAGES := kmod-mt7615e kmod-mt7615-firmware wpad-basic
+  KERNEL_INITRAMFS := $$(KERNEL) | uimage-padhdr 96
+  IMAGES += factory.bin
+  IMAGE/sysupgrade.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
+	pad-rootfs | append-metadata | check-size
+  IMAGE/factory.bin := append-kernel | append-rootfs | uimage-padhdr 96 |\
+	check-size
+endef
+TARGET_DEVICES += dlink_dir-878-a1
+
 define Device/d-team_newifi-d2
   $(Device/uimage-lzma-loader)
   IMAGE_SIZE := 32448k
diff --git a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
index a0f9b2b10d..02f264fb42 100755
--- a/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
+++ b/target/linux/ramips/mt7621/base-files/etc/board.d/01_leds
@@ -26,7 +26,8 @@ d-team,pbr-m1|\
 gehua,ghl-r-001)
 	ucidef_set_led_netdev "internet" "internet" "$boardname:blue:internet" "wan"
 	;;
-dlink,dir-860l-b1)
+dlink,dir-860l-b1|\
+dlink,dir-878-a1)
 	ucidef_set_led_netdev "wan" "wan" "$boardname:green:net" "wan"
 	;;
 gnubee,gb-pc1|\