diff --git a/target/linux/ath79/dts/qca9531_tplink_tl-mr6400-v1.dts b/target/linux/ath79/dts/qca9531_tplink_tl-mr6400-v1.dts
new file mode 100644
index 0000000000..7299257cda
--- /dev/null
+++ b/target/linux/ath79/dts/qca9531_tplink_tl-mr6400-v1.dts
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#include "qca953x.dtsi"
+
+/ {
+	compatible = "tplink,tl-mr6400-v1", "qca,qca9531";
+	model = "TP-Link TL-MR6400 v1";
+
+	aliases {
+		led-boot = &led_power;
+		led-failsafe = &led_power;
+		led-running = &led_power;
+		led-upgrade = &led_power;
+		label-mac-device = &wmac;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		/* D12 */
+		wan {
+			label = "tp-link:white:wan";
+			gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+		};
+
+		/* D11 */
+		4g {
+			label = "tp-link:white:4g";
+			gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+		};
+
+		/* D5 */
+		wps {
+			label = "tp-link:white:wps";
+			gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+		};
+
+		/* D3 */
+		wlan {
+			label = "tp-link:white:wlan";
+			gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0tpt";
+		};
+
+		/* D2 */
+		led_power: power {
+			label = "tp-link:white:power";
+			gpios = <&gpio 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		/* D4 */
+		lan {
+			label = "tp-link:white:lan";
+			gpios = <&gpio 16 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	keys {
+		compatible = "gpio-keys";
+
+		/* SW2 */
+		reset {
+			label = "Reset button";
+			linux,code = <KEY_RESTART>;
+			gpios = <&gpio 12 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+
+		/* SW3 */
+		rfkill {
+			label = "RF kill button";
+			linux,code = <KEY_RFKILL>;
+			gpios = <&gpio 14 GPIO_ACTIVE_LOW>;
+			debounce-interval = <60>;
+		};
+	};
+
+	gpio-export {
+		compatible = "gpio-export";
+
+		gpio_usb_power {
+			gpio-export,name = "tp-link:power:lte";
+			gpio-export,output = <0>;
+			gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&uart {
+	status = "okay";
+};
+
+&spi {
+	status = "okay";
+
+	num-cs = <1>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <25000000>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			uboot: partition@0 {
+				label = "u-boot";
+				reg = <0x000000 0x020000>;
+				read-only;
+			};
+
+			partition@20000 {
+				compatible = "tplink,firmware";
+				label = "firmware";
+				reg = <0x020000 0x7d0000>;
+			};
+
+			art: partition@7f0000 {
+				label = "art";
+				reg = <0x7f0000 0x010000>;
+				read-only;
+			};
+		};
+	};
+};
+
+&eth0 {
+	status = "okay";
+
+	phy-handle = <&swphy0>;
+
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <1>;
+};
+
+&eth1 {
+	mtd-mac-address = <&uboot 0x1fc00>;
+	mtd-mac-address-increment = <(-1)>;
+};
+
+&wmac {
+	status = "okay";
+
+	mtd-cal-data = <&art 0x1000>;
+	mtd-mac-address = <&uboot 0x1fc00>;
+};
+
+&usb0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	hub_port: port@1 {
+		reg = <1>;
+		#trigger-source-cells = <0>;
+	};
+};
+
+&usb_phy {
+	status = "okay";
+};
diff --git a/target/linux/ath79/generic/base-files/etc/board.d/01_leds b/target/linux/ath79/generic/base-files/etc/board.d/01_leds
index de4e8b4a7f..1023ba7a39 100755
--- a/target/linux/ath79/generic/base-files/etc/board.d/01_leds
+++ b/target/linux/ath79/generic/base-files/etc/board.d/01_leds
@@ -215,6 +215,11 @@ tplink,re450-v2)
 	ucidef_set_led_netdev "lan_data" "LAN Data" "tp-link:green:lan_data" "eth0" "tx rx"
 	ucidef_set_led_netdev "lan_link" "LAN Link" "tp-link:green:lan_link" "eth0" "link"
 	;;
+tplink,tl-mr6400-v1)
+	ucidef_set_led_switch "lan" "LAN" "tp-link:white:lan" "switch0" "0x0e"
+	ucidef_set_led_netdev "wan" "WAN" "tp-link:white:wan" "eth1"
+	ucidef_set_led_netdev "4g" "4G" "tp-link:white:4g" "usb0"
+	;;
 tplink,tl-wr842n-v2)
 	ucidef_set_led_netdev "wan" "WAN" "tp-link:green:wan" "eth1"
 	ucidef_set_led_switch "lan1" "LAN1" "tp-link:green:lan1" "switch0" "0x04"
diff --git a/target/linux/ath79/generic/base-files/etc/board.d/02_network b/target/linux/ath79/generic/base-files/etc/board.d/02_network
index a96b504d5a..0bae9dc384 100755
--- a/target/linux/ath79/generic/base-files/etc/board.d/02_network
+++ b/target/linux/ath79/generic/base-files/etc/board.d/02_network
@@ -236,6 +236,11 @@ ath79_setup_interfaces()
 		ucidef_add_switch "switch0" \
 			"0@eth0" "2:lan:3" "3:lan:2" "4:lan:1" "1:wan"
 		;;
+	tplink,tl-mr6400-v1)
+		ucidef_set_interfaces_lan_wan "eth0.1 eth1" "usb0"
+		ucidef_add_switch "switch0" \
+			"0@eth0" "1:lan:1" "2:lan:3" "3:lan:2"
+		;;
 	tplink,tl-wr842n-v2)
 		ucidef_set_interface_wan "eth1"
 		ucidef_add_switch "switch0" \
diff --git a/target/linux/ath79/image/generic-tp-link.mk b/target/linux/ath79/image/generic-tp-link.mk
index a7266f05a9..53138e343b 100644
--- a/target/linux/ath79/image/generic-tp-link.mk
+++ b/target/linux/ath79/image/generic-tp-link.mk
@@ -374,6 +374,18 @@ define Device/tplink_re450-v2
 endef
 TARGET_DEVICES += tplink_re450-v2
 
+define Device/tplink_tl-mr6400-v1
+  $(Device/tplink-8mlzma)
+  SOC := qca9531
+  DEVICE_MODEL := TL-MR6400
+  DEVICE_VARIANT := v1
+  TPLINK_HWID := 0x64000001
+  DEVICE_PACKAGES := kmod-usb2 kmod-usb-net kmod-usb-net-rndis kmod-usb-serial \
+	kmod-usb-serial-option adb-enablemodem
+  SUPPORTED_DEVICES += tl-mr6400
+endef
+TARGET_DEVICES += tplink_tl-mr6400-v1
+
 define Device/tplink_tl-wdr3500-v1
   $(Device/tplink-8mlzma)
   SOC := ar9344