diff --git a/target/linux/ar71xx/base-files/etc/diag.sh b/target/linux/ar71xx/base-files/etc/diag.sh
index 0553251..d64a5be 100644
--- a/target/linux/ar71xx/base-files/etc/diag.sh
+++ b/target/linux/ar71xx/base-files/etc/diag.sh
@@ -308,6 +308,9 @@ get_status_led() {
 	wpj344)
 		status_led="wpj344:green:status"
 		;;
+	wpj531)
+		status_led="wpj531:green:sig3"
+		;;
 	wpj558)
 		status_led="wpj558:green:sig3"
 		;;
diff --git a/target/linux/ar71xx/base-files/etc/uci-defaults/02_network b/target/linux/ar71xx/base-files/etc/uci-defaults/02_network
index f5c6865..5f0d302 100644
--- a/target/linux/ar71xx/base-files/etc/uci-defaults/02_network
+++ b/target/linux/ar71xx/base-files/etc/uci-defaults/02_network
@@ -368,6 +368,10 @@ wpj344)
 	ucidef_add_switch_vlan "switch0" "2" "0t 2"
 	;;
 
+wpj531)
+	ucidef_set_interfaces_lan_wan "eth0" "eth1"
+	;;
+
 wpj558)
 	ucidef_set_interfaces_lan_wan "eth0.1" "eth0.2"
 	ucidef_add_switch "switch0" "1" "1"
diff --git a/target/linux/ar71xx/base-files/lib/ar71xx.sh b/target/linux/ar71xx/base-files/lib/ar71xx.sh
index d5dd561..bf18bb7 100755
--- a/target/linux/ar71xx/base-files/lib/ar71xx.sh
+++ b/target/linux/ar71xx/base-files/lib/ar71xx.sh
@@ -813,6 +813,9 @@ ar71xx_board_detect() {
 	*WPJ344)
 		name="wpj344"
 		;;
+	*WPJ531)
+		name="wpj531"
+		;;
 	*WPJ558)
 		name="wpj558"
 		;;
diff --git a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
index 3dbd91c..ade47fb 100755
--- a/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ar71xx/base-files/lib/upgrade/platform.sh
@@ -229,6 +229,7 @@ platform_check_image() {
 	rocket-m-xw | \
 	nanostation-m-xw | \
 	rw2458n | \
+	wpj531 | \
 	wndap360 | \
 	wpj344 | \
 	wzr-hp-g300nh2 | \
diff --git a/target/linux/ar71xx/config-3.18 b/target/linux/ar71xx/config-3.18
index 543b77e..9a7ed7f 100644
--- a/target/linux/ar71xx/config-3.18
+++ b/target/linux/ar71xx/config-3.18
@@ -139,6 +139,7 @@ CONFIG_ATH79_MACH_WNR2200=y
 CONFIG_ATH79_MACH_WP543=y
 CONFIG_ATH79_MACH_WPE72=y
 CONFIG_ATH79_MACH_WPJ344=y
+CONFIG_ATH79_MACH_WPJ531=y
 CONFIG_ATH79_MACH_WPJ558=y
 CONFIG_ATH79_MACH_WRT160NL=y
 CONFIG_ATH79_MACH_WRT400N=y
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-wpj531.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-wpj531.c
new file mode 100644
index 0000000..bc13d70
--- /dev/null
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-wpj531.c
@@ -0,0 +1,136 @@
+/*
+ * Compex WPJ531 board support
+ *
+ * Copyright (c) 2012 Qualcomm Atheros
+ * Copyright (c) 2012 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/ar8216_platform.h>
+
+#include <asm/mach-ath79/ar71xx_regs.h>
+
+#include "pci.h"
+#include "common.h"
+#include "dev-ap9x-pci.h"
+#include "dev-gpio-buttons.h"
+#include "dev-eth.h"
+#include "dev-leds-gpio.h"
+#include "dev-m25p80.h"
+#include "dev-usb.h"
+#include "dev-wmac.h"
+#include "machtypes.h"
+
+#define WPJ531_GPIO_LED_SIG1    14
+#define WPJ531_GPIO_LED_SIG2    15
+#define WPJ531_GPIO_LED_SIG3    22
+#define WPJ531_GPIO_LED_SIG4    23
+#define WPJ531_GPIO_BUZZER      4
+
+#define WPJ531_GPIO_BTN_RESET   17
+
+#define WPJ531_KEYS_POLL_INTERVAL	20	/* msecs */
+#define WPJ531_KEYS_DEBOUNCE_INTERVAL	(3 * WPJ531_KEYS_POLL_INTERVAL)
+
+#define WPJ531_MAC0_OFFSET		0x10
+#define WPJ531_MAC1_OFFSET		0x18
+#define WPJ531_WMAC_CALDATA_OFFSET	0x1000
+#define WPJ531_PCIE_CALDATA_OFFSET	0x5000
+
+#define WPJ531_ART_SIZE		0x8000
+
+static struct gpio_led wpj531_leds_gpio[] __initdata = {
+	{
+		.name		= "wpj531:red:sig1",
+		.gpio		= WPJ531_GPIO_LED_SIG1,
+		.active_low	= 1,
+	},
+	{
+		.name		= "wpj531:yellow:sig2",
+		.gpio		= WPJ531_GPIO_LED_SIG2,
+		.active_low	= 1,
+	},
+	{
+		.name		= "wpj531:green:sig3",
+		.gpio		= WPJ531_GPIO_LED_SIG3,
+		.active_low	= 1,
+	},
+	{
+		.name		= "wpj531:green:sig4",
+		.gpio		= WPJ531_GPIO_LED_SIG4,
+		.active_low	= 1,
+	},
+	{
+		.name		= "wpj531:buzzer",
+		.gpio		= WPJ531_GPIO_BUZZER,
+		.active_low	= 0,
+	}
+};
+
+static struct gpio_keys_button wpj531_gpio_keys[] __initdata = {
+	{
+		.desc		= "reset",
+		.type		= EV_KEY,
+		.code		= KEY_RESTART,
+		.debounce_interval = WPJ531_KEYS_DEBOUNCE_INTERVAL,
+		.gpio		= WPJ531_GPIO_BTN_RESET,
+		.active_low	= 1,
+	},
+};
+
+static void __init common_setup(void)
+{
+	u8 *mac = (u8 *) KSEG1ADDR(0x1f01fc00);
+	u8 *ee = (u8 *) KSEG1ADDR(0x1fff1000);
+	u8 tmpmac[ETH_ALEN];
+
+	ath79_register_m25p80(NULL);
+
+	ath79_setup_ar933x_phy4_switch(false, false);
+
+	ath79_register_mdio(0, 0x0);
+
+	/* LAN */
+	ath79_init_mac(ath79_eth0_data.mac_addr, mac, 0);
+	ath79_register_eth(0);
+
+	/* WAN */
+	ath79_switch_data.phy4_mii_en = 1;
+	ath79_eth1_data.phy_if_mode = PHY_INTERFACE_MODE_MII;
+	ath79_init_mac(ath79_eth1_data.mac_addr, mac, 1);
+	ath79_register_eth(1);
+
+	ath79_register_wmac(ee, tmpmac);
+
+	ath79_register_pci();
+}
+
+static void __init wpj531_setup(void)
+{
+	common_setup();
+
+	ath79_register_leds_gpio(-1,
+				ARRAY_SIZE(wpj531_leds_gpio),
+				wpj531_leds_gpio);
+
+	ath79_register_gpio_keys_polled(-1,
+					WPJ531_KEYS_POLL_INTERVAL,
+					ARRAY_SIZE(wpj531_gpio_keys),
+					wpj531_gpio_keys);
+}
+
+MIPS_MACHINE(ATH79_MACH_WPJ531, "WPJ531", "Compex WPJ531", wpj531_setup);
diff --git a/target/linux/ar71xx/generic/profiles/compex.mk b/target/linux/ar71xx/generic/profiles/compex.mk
index 6528d4a..2f6e0b2 100644
--- a/target/linux/ar71xx/generic/profiles/compex.mk
+++ b/target/linux/ar71xx/generic/profiles/compex.mk
@@ -37,6 +37,16 @@ endef
 
 $(eval $(call Profile,WPJ344))
 
+define Profile/WPJ531
+	NAME:=Compex WPJ531
+endef
+
+define Profile/WPJ531/Description
+	Package set optimized for the Compex WPJ531 board.
+endef
+
+$(eval $(call Profile,WPJ531))
+
 define Profile/WPJ558
 	NAME:=Compex WPJ558
 endef
diff --git a/target/linux/ar71xx/image/Makefile b/target/linux/ar71xx/image/Makefile
index 580a640..1d41516 100644
--- a/target/linux/ar71xx/image/Makefile
+++ b/target/linux/ar71xx/image/Makefile
@@ -931,6 +931,7 @@ ubdev_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7488k(firmware)
 whrhpg300n_mtdlayout=mtdparts=spi0.0:248k(u-boot)ro,8k(u-boot-env)ro,3712k(firmware),64k(art)ro
 wlr8100_mtdlayout=mtdparts=spi0.0:192k(u-boot)ro,64k(u-boot-env)ro,1408k(kernel),14080k(rootfs),192k(unknown)ro,64k(art)ro,384k(unknown2)ro,15488k@0x40000(firmware)
 wpj344_mtdlayout_16M=mtdparts=spi0.0:192k(u-boot)ro,16128k(firmware),64k(art)ro
+wpj531_mtdlayout_16M=mtdparts=spi0.0:192k(u-boot)ro,16128k(firmware),64k(art)ro
 wpj558_mtdlayout_16M=mtdparts=spi0.0:192k(u-boot)ro,16128k(firmware),64k(art)ro
 wndap360_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,1728k(kernel),6016k(rootfs),64k(nvram)ro,64k(art)ro,7744k@0x50000(firmware)
 wnr2200_mtdlayout=mtdparts=spi0.0:256k(u-boot)ro,64k(u-boot-env)ro,7808k(firmware),64k(art)ro
@@ -1803,6 +1804,7 @@ $(eval $(call SingleProfile,AthLzma,64k,PB92,pb92,PB92,ttyS0,115200,$$(pb92_mtdl
 $(eval $(call SingleProfile,AthLzma,64k,TUBE2H16M,tube2h-16M,TUBE2H,ttyATH0,115200,$$(alfa_mtdlayout_16M),KRuImage,65536))
 $(eval $(call SingleProfile,AthLzma,64k,WLR8100,wlr8100,WLR8100,ttyS0,115200,$$(wlr8100_mtdlayout),KRuImage))
 $(eval $(call SingleProfile,AthLzma,64k,WPJ344_16M,wpj344-16M,WPJ344,ttyS0,115200,$$(wpj344_mtdlayout_16M),KRuImage,65536))
+$(eval $(call SingleProfile,AthLzma,64k,WPJ531_16M,wpj531-16M,WPJ531,ttyS0,115200,$$(wpj531_mtdlayout_16M),KRuImage,65536))
 $(eval $(call SingleProfile,AthLzma,64k,WPJ558_16M,wpj558-16M,WPJ558,ttyS0,115200,$$(wpj558_mtdlayout_16M),KRuImage,65536))
 
 $(eval $(call SingleProfile,Belkin,64k,F9K1115V2,f9k1115v2,F9K1115V2,ttyS0,115200,$$(f9k1115v2_mtdlayout),BR-6679BAC))
@@ -1981,6 +1983,7 @@ $(eval $(call MultiProfile,WNR1000V2,REALWNR1000V2 WNR1000V2_VC))
 $(eval $(call MultiProfile,WP543,WP543_2M WP543_4M WP543_8M WP543_16M))
 $(eval $(call MultiProfile,WPE72,WPE72_4M WPE72_8M WPE72_16M))
 $(eval $(call MultiProfile,WPJ344,WPJ344_16M))
+$(eval $(call MultiProfile,WPJ531,WPJ531_16M))
 $(eval $(call MultiProfile,WPJ558,WPJ558_16M))
 
 $(eval $(call MultiProfile,Minimal,$(SINGLE_PROFILES)))
diff --git a/target/linux/ar71xx/patches-3.18/610-MIPS-ath79-openwrt-machines.patch b/target/linux/ar71xx/patches-3.18/610-MIPS-ath79-openwrt-machines.patch
index f8a561c..d374966 100644
--- a/target/linux/ar71xx/patches-3.18/610-MIPS-ath79-openwrt-machines.patch
+++ b/target/linux/ar71xx/patches-3.18/610-MIPS-ath79-openwrt-machines.patch
@@ -1,6 +1,6 @@
 --- a/arch/mips/ath79/machtypes.h
 +++ b/arch/mips/ath79/machtypes.h
-@@ -16,22 +16,191 @@
+@@ -16,22 +16,192 @@
  
  enum ath79_mach_type {
  	ATH79_MACH_GENERIC = 0,
@@ -179,6 +179,7 @@
 +	ATH79_MACH_WP543,		/* Compex WP543 */
 +	ATH79_MACH_WPE72,		/* Compex WPE72 */
 +	ATH79_MACH_WPJ344,		/* Compex WPJ344 */
++	ATH79_MACH_WPJ531,		/* Compex WPJ531 */
 +	ATH79_MACH_WPJ558,		/* Compex WPJ558 */
 +	ATH79_MACH_WRT160NL,		/* Linksys WRT160NL */
 +	ATH79_MACH_WRT400N,		/* Linksys WRT400N */
@@ -265,7 +266,7 @@
  config ATH79_MACH_AP121
  	bool "Atheros AP121 reference board"
  	select SOC_AR933X
-@@ -11,62 +75,986 @@ config ATH79_MACH_AP121
+@@ -11,62 +75,996 @@ config ATH79_MACH_AP121
  	select ATH79_DEV_M25P80
  	select ATH79_DEV_USB
  	select ATH79_DEV_WMAC
@@ -510,6 +511,16 @@
 +	select ATH79_DEV_USB
 +	select ATH79_DEV_WMAC
 +
++config ATH79_MACH_WPJ531
++       bool "Compex WPJ531 board support"
++       select SOC_QCA953X
++       select ATH79_DEV_ETH
++       select ATH79_DEV_GPIO_BUTTONS
++       select ATH79_DEV_LEDS_GPIO
++       select ATH79_DEV_M25P80
++       select ATH79_DEV_USB
++       select ATH79_DEV_WMAC
++
 +config ATH79_MACH_WPJ558
 +	bool "Compex WPJ558 board support"
 +	select SOC_QCA955X
@@ -1280,7 +1291,7 @@
  
  config ATH79_MACH_UBNT_XM
  	bool "Ubiquiti Networks XM/UniFi boards"
-@@ -83,6 +1071,97 @@ config ATH79_MACH_UBNT_XM
+@@ -83,6 +1081,97 @@ config ATH79_MACH_UBNT_XM
  	  Say 'Y' here if you want your kernel to support the
  	  Ubiquiti Networks XM (rev 1.0) board.
  
@@ -1378,7 +1389,7 @@
  endmenu
  
  config SOC_AR71XX
-@@ -124,7 +1203,10 @@ config ATH79_DEV_DSA
+@@ -124,7 +1213,10 @@ config ATH79_DEV_DSA
  config ATH79_DEV_ETH
  	def_bool n
  
@@ -1390,7 +1401,7 @@
  	def_bool n
  
  config ATH79_DEV_GPIO_BUTTONS
-@@ -154,6 +1236,11 @@ config ATH79_PCI_ATH9K_FIXUP
+@@ -154,6 +1246,11 @@ config ATH79_PCI_ATH9K_FIXUP
  	def_bool n
  
  config ATH79_ROUTERBOOT
@@ -1404,7 +1415,7 @@
  endif
 --- a/arch/mips/ath79/Makefile
 +++ b/arch/mips/ath79/Makefile
-@@ -38,9 +38,120 @@ obj-$(CONFIG_ATH79_ROUTERBOOT)		+= route
+@@ -38,9 +48,121 @@ obj-$(CONFIG_ATH79_ROUTERBOOT)		+= route
  #
  # Machines
  #
@@ -1514,6 +1525,7 @@
 +obj-$(CONFIG_ATH79_MACH_WP543)		+= mach-wp543.o
 +obj-$(CONFIG_ATH79_MACH_WPE72)		+= mach-wpe72.o
 +obj-$(CONFIG_ATH79_MACH_WPJ344)	+= mach-wpj344.o
++obj-$(CONFIG_ATH79_MACH_WPJ531)	+= mach-wpj531.o
 +obj-$(CONFIG_ATH79_MACH_WPJ558)	+= mach-wpj558.o
 +obj-$(CONFIG_ATH79_MACH_WRT160NL)	+= mach-wrt160nl.o
 +obj-$(CONFIG_ATH79_MACH_WRT400N)	+= mach-wrt400n.o
