diff --git a/target/linux/ar71xx/base-files/etc/board.d/01_leds b/target/linux/ar71xx/base-files/etc/board.d/01_leds
index 54727a6e52..4d50f489d5 100755
--- a/target/linux/ar71xx/base-files/etc/board.d/01_leds
+++ b/target/linux/ar71xx/base-files/etc/board.d/01_leds
@@ -683,7 +683,8 @@ rb-2011uias-2hnd-r2)
 	ucidef_set_led_switch "eth9" "ETH9" "rb:green:eth9" "switch1" "0x04"
 	ucidef_set_led_switch "eth10" "ETH10" "rb:green:eth10" "switch1" "0x02"
 	;;
-rb-lhg-5nd)
+rb-lhg-5nd|\
+rb-sxtsq-2nd)
 	ucidef_set_led_netdev "lan" "LAN" "rb:green:eth" "eth0"
 	ucidef_set_rssimon "wlan0" "200000" "1"
 	ucidef_set_led_rssi "rssilow" "RSSILOW" "rb:green:rssi0" "wlan0" "1" "100" "0" "13"
diff --git a/target/linux/ar71xx/base-files/etc/board.d/02_network b/target/linux/ar71xx/base-files/etc/board.d/02_network
index 1487ff58de..1334e48e7a 100755
--- a/target/linux/ar71xx/base-files/etc/board.d/02_network
+++ b/target/linux/ar71xx/base-files/etc/board.d/02_network
@@ -116,6 +116,7 @@ ar71xx_setup_interfaces()
 	rb-sxt2n|\
 	rb-sxt-2nd-r3|\
 	rb-sxt5n|\
+	rb-sxtsq-2nd|\
 	rb-wap-2nd|\
 	rb-wapr-2nd|\
 	rb-wapg-5hact2hnd|\
diff --git a/target/linux/ar71xx/base-files/etc/diag.sh b/target/linux/ar71xx/base-files/etc/diag.sh
index c5fe5bdcc1..b0e56fda8a 100644
--- a/target/linux/ar71xx/base-files/etc/diag.sh
+++ b/target/linux/ar71xx/base-files/etc/diag.sh
@@ -381,6 +381,7 @@ get_status_led() {
 	rb-map-2nd|\
 	rb-mapl-2nd|\
 	rb-sxt-2nd-r3|\
+	rb-sxtsq-2nd|\
 	rb-wap-2nd|\
 	rb-wapr-2nd)
 		status_led="rb:green:user"
diff --git a/target/linux/ar71xx/base-files/lib/ar71xx.sh b/target/linux/ar71xx/base-files/lib/ar71xx.sh
index 044ef4eae5..cf792783c4 100755
--- a/target/linux/ar71xx/base-files/lib/ar71xx.sh
+++ b/target/linux/ar71xx/base-files/lib/ar71xx.sh
@@ -542,6 +542,9 @@ mikrotik_board_detect() {
 	*"SXT Lite5")
 		name="rb-sxt5n"
 		;;
+	*"SXTsq 2nD")
+		name="rb-sxtsq-2nd"
+		;;
 	*"wAP 2nD r2")
 		name="rb-wap-2nd"
 		;;
diff --git a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
index a76842bdde..618fb3b8ca 100755
--- a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
@@ -726,6 +726,7 @@ platform_check_image() {
 	rb-map-2nd|\
 	rb-mapl-2nd|\
 	rb-sxt-2nd-r3|\
+	rb-sxtsq-2nd|\
 	rb-wap-2nd|\
 	rb-wapg-5hact2hnd|\
 	rb-wapr-2nd)
@@ -786,6 +787,7 @@ platform_do_upgrade() {
 	rb-map-2nd|\
 	rb-mapl-2nd|\
 	rb-sxt-2nd-r3|\
+	rb-sxtsq-2nd|\
 	rb-wap-2nd|\
 	rb-wapg-5hact2hnd|\
 	rb-wapr-2nd)
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
index 6fd78c46a0..3657f9ca49 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
+++ b/target/linux/ar71xx/files/arch/mips/ath79/Kconfig.openwrt
@@ -1189,6 +1189,7 @@ config ATH79_MACH_RBSPI
 	  MikroTik RouterBOARD LHG 5
 	  MikroTik RouterBOARD cAP (EXPERIMENTAL)
 	  MikroTik RouterBOARD SXT Lite 2 r3
+	  MikroTik RouterBOARD STXsq Lite2
 	  MikroTik RouterBOARD wAP
 	  MikroTik RouterBOARD wAP R-2nD
 
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-rbspi.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-rbspi.c
index 6bb42c78e3..bf4518698e 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-rbspi.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-rbspi.c
@@ -14,6 +14,7 @@
  *  - MikroTik RouterBOARD 750P-PBr2
  *  - MikroTik RouterBOARD 750 r2
  *  - MikroTik RouterBOARD LHG 5nD
+ *  - MikroTik RouterBOARD SXTsq 2nD
  *  - MikroTik RouterBOARD wAP2nD
  *  - MikroTik RouterBOARD wAP G-5HacT2HnDwAP (wAP AC)
  *  - MikroTik RouterBOARD wAP R-2nD
@@ -24,7 +25,7 @@
  *  hardware as the mAP L-2nD. It is unknown if they share the same board
  *  identifier.
  *
- *  Copyright (C) 2017-2018 Thibaut VARENE <varenet@parisc-linux.org>
+ *  Copyright (C) 2017-2020 Thibaut VARENE <varenet@parisc-linux.org>
  *  Copyright (C) 2016 David Hutchison <dhutchison@bluemesh.net>
  *  Copyright (C) 2017 Ryan Mounce <ryan@mounce.com.au>
  *
@@ -479,6 +480,55 @@ static struct gpio_led rblhg_leds[] __initdata = {
 	},
 };
 
+/* RB SXTsq 2nD gpios */
+#define RBSXTSQ_GPIO_LED_0	11
+#define RBSXTSQ_GPIO_LED_1	9
+#define RBSXTSQ_GPIO_LED_2	12
+#define RBSXTSQ_GPIO_LED_3	13
+#define RBSXTSQ_GPIO_LED_4	16	// shared with reset button
+#define RBSXTSQ_GPIO_LED_ETH	4
+#define RBSXTSQ_GPIO_LED_POWER	17
+#define RBSXTSQ_GPIO_LED_USER	14
+#define RBSXTSQ_GPIO_BTN_RESET	16
+
+static struct gpio_led rbsxtsq_leds[] __initdata = {
+	{
+		.name = "rb:green:rssi0",
+		.gpio = RBSXTSQ_GPIO_LED_0,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi1",
+		.gpio = RBSXTSQ_GPIO_LED_1,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi2",
+		.gpio = RBSXTSQ_GPIO_LED_2,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:rssi3",
+		.gpio = RBSXTSQ_GPIO_LED_3,
+		.active_low = 1,
+/*	}, {
+		// LED_4 GPIO is shared with reset button => Do not register this LED
+		.name = "rb:green:rssi4",
+		.gpio = RBSXTSQ_GPIO_LED_4,
+		.active_low = 1,
+*/	}, {
+		.name = "rb:green:eth",
+		.gpio = RBSXTSQ_GPIO_LED_ETH,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:user",
+		.gpio = RBSXTSQ_GPIO_LED_USER,
+		.active_low = 1,
+	}, {
+		.name = "rb:green:power",
+		.gpio = RBSXTSQ_GPIO_LED_POWER,
+		.active_low = 0,
+		.default_state = LEDS_GPIO_DEFSTATE_ON,
+	},
+};
+
 /* RB w APG-5HacT2HnD (wAP AC) gpios*/
 #define RBWAPGSC_WIFI_LED_1		1
 #define RBWAPGSC_WIFI_LED_2		8
@@ -1021,6 +1071,31 @@ static void __init rblhg_setup(void)
 }
 
 /*
+ * Init the SXTsq Lite2 (QCA9533).
+ * This device has a single ethernet port connected to PHY0.
+ * Wireless is provided via 2.4GHz WLAN1.
+ */
+static void __init rbsxtsq_setup(void)
+{
+	u32 flags = RBSPI_HAS_WLAN1;
+
+	if (!rbspi_platform_setup())
+		return;
+
+	rbspi_peripherals_setup(flags);
+
+	/* GMAC1 is HW MAC, WLAN1 MAC is HW MAC + 1 */
+	rbspi_network_setup(flags, 0, 0, 1);
+
+	ath79_register_leds_gpio(-1, ARRAY_SIZE(rbsxtsq_leds), rbsxtsq_leds);
+
+	/* Make the eth LED controllable by software. */
+	ath79_gpio_output_select(RBSXTSQ_GPIO_LED_ETH, AR934X_GPIO_OUT_GPIO);
+
+	rbspi_register_reset_button(RBSXTSQ_GPIO_BTN_RESET);
+}
+
+/*
  * Init the wAP hardware.
  * The wAP 2nD has a single ethernet port.
  */
@@ -1260,3 +1335,4 @@ MIPS_MACHINE_NONAME(ATH79_MACH_RB_CAP, "cap-hb", rbcap_setup);
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_MAP, "map2-hb", rbmap_setup);
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_WAPAC, "wapg-sc", rbwapgsc_setup);
 MIPS_MACHINE_NONAME(ATH79_MACH_RB_931, "931", rb931_setup);
+MIPS_MACHINE_NONAME(ATH79_MACH_RB_SXTSQL2, "lhg-hb", rbsxtsq_setup);
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
index 900b4ec87b..7954a62835 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
+++ b/target/linux/ar71xx/files/arch/mips/ath79/machtypes.h
@@ -233,6 +233,7 @@ enum ath79_mach_type {
 	ATH79_MACH_RB_WAPAC,			/* Mikrotik RouterBOARD wAPG-5HacT2HnD */
 	ATH79_MACH_RB_SXTLITE2ND,		/* Mikrotik RouterBOARD SXT Lite 2nD */
 	ATH79_MACH_RB_SXTLITE5ND,		/* Mikrotik RouterBOARD SXT Lite 5nD */
+	ATH79_MACH_RB_SXTSQL2,			/* Mikrotik RouterBOARD SXTsq 2nD */
 	ATH79_MACH_RE355,			/* TP-LINK RE355 */
 	ATH79_MACH_RE450,			/* TP-LINK RE450 */
 	ATH79_MACH_RME_EG200,			/* eTactica EG200 */
diff --git a/target/linux/ar71xx/image/mikrotik.mk b/target/linux/ar71xx/image/mikrotik.mk
index dbbccb1c3f..d23e26c069 100644
--- a/target/linux/ar71xx/image/mikrotik.mk
+++ b/target/linux/ar71xx/image/mikrotik.mk
@@ -46,7 +46,7 @@ define Device/rb-nor-flash-16M
   DEVICE_PACKAGES := rbcfg rssileds -nand-utils kmod-ledtrig-gpio
   IMAGE_SIZE := 16000k
   KERNEL_INSTALL := 1
-  SUPPORTED_DEVICES := rb-750-r2 rb-750up-r2 rb-750p-pbr2 rb-911-2hn rb-911-5hn rb-931-2nd rb-941-2nd rb-951ui-2nd rb-952ui-5ac2nd rb-962uigs-5hact2hnt rb-lhg-5nd rb-map-2nd rb-mapl-2nd rb-wap-2nd rb-wapr-2nd rb-sxt-2nd-r3
+  SUPPORTED_DEVICES := rb-750-r2 rb-750up-r2 rb-750p-pbr2 rb-911-2hn rb-911-5hn rb-931-2nd rb-941-2nd rb-951ui-2nd rb-952ui-5ac2nd rb-962uigs-5hact2hnt rb-lhg-5nd rb-map-2nd rb-mapl-2nd rb-wap-2nd rb-wapr-2nd rb-sxt-2nd-r3 rb-sxtsq-2nd
   IMAGE/sysupgrade.bin := append-kernel | kernel2minor -s 1024 -e | pad-to $$$$(BLOCKSIZE) | \
 	append-rootfs | pad-rootfs | append-metadata | check-size $$$$(IMAGE_SIZE)
 endef
