diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index e44da40..7fb4696 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -123,7 +123,8 @@ dtb-$(CONFIG_ARCH_U8500) += snowball.dtb \
 dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \
 	r8a7740-armadillo800eva.dtb \
 	sh73a0-kzm9g.dtb \
-	sh7372-mackerel.dtb
+	sh7372-mackerel.dtb \
+	sh7372-mackerel-reference.dtb
 dtb-$(CONFIG_ARCH_SPEAR13XX) += spear1310-evb.dtb \
 	spear1340-evb.dtb
 dtb-$(CONFIG_ARCH_SPEAR3XX)+= spear300-evb.dtb \
diff --git a/arch/arm/boot/dts/sh7372-mackerel-reference.dts b/arch/arm/boot/dts/sh7372-mackerel-reference.dts
new file mode 100644
index 0000000..2fd1eff
--- /dev/null
+++ b/arch/arm/boot/dts/sh7372-mackerel-reference.dts
@@ -0,0 +1,131 @@
+/*
+ * Device Tree Source for the mackerel board
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/dts-v1/;
+/include/ "sh7372.dtsi"
+
+/ {
+	model = "Mackerel (AP4 EVM 2nd)";
+	compatible = "renesas,mackerel-reference";
+
+	memory {
+		device_type = "memory";
+		reg = <0x40000000 0x10000000>;
+	};
+
+	reg_1p8v: regulator@0 {
+		compatible = "regulator-fixed";
+		regulator-name = "1P8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator@1 {
+		compatible = "regulator-fixed";
+		regulator-name = "3P3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	lan9220@14000000 {
+		compatible = "smsc,lan9220", "smsc,lan9115";
+		reg = <0x14000000 0x2000000>;
+		phy-mode = "mii";
+		interrupt-parent = <&intca_irq_pins_lo>;
+		interrupts = <0x2c0>;
+		reg-io-width = <4>;
+		smsc,irq-push-pull;
+		smsc,save-mac-address;
+		vddvario-supply = <&reg_1p8v>;
+		vdd33a-supply = <&reg_3p3v>;
+	};
+
+	i2c1: i2c@e6c20000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "renesas,rmobile-iic";
+		reg = <0xe6c20000 0x1000>;
+		interrupt-parent = <&intca>;
+		interrupts = <0x780 0x7a0 0x7c0 0x7e0>;
+
+		clock-frequency = <100000>;
+
+		accelerometer@53 {
+			compatible = "analog-devices,adxl34x";
+			reg = <0x53>;
+			interrupt-parent = <&intca_irq_pins_hi>;
+			interrupts = <0x32a0>;
+		};
+	};
+
+	mmcif0: mmcif@0xe6bd0000 {
+		compatible = "renesas,sh-mmcif", "renesas,sh7372-mmcif";
+		reg = <0xe6bd0000 0x100>;
+		interrupt-parent = <&intca>;
+		interrupts = <0x1ac0 0x1ae0>;
+		vmmc-supply = <&reg_1p8v>;
+	};
+
+	sdhi0: sdhi@0xe6850000 {
+		compatible = "renesas,shmobile-sdhi";
+		reg = <0xe6850000 0x100>;
+		interrupt-parent = <&intca>;
+		interrupts = <0x0e00 0x0e20 0x0e40>;
+		vmmc-supply = <&reg_3p3v>;
+	};
+
+	sdhi1: sdhi@0xe6860000 {
+		compatible = "renesas,shmobile-sdhi";
+		reg = <0xe6860000 0x100>;
+		interrupt-parent = <&intca>;
+		interrupts = <0x0e80 0x0ea0 0x0ec0>;
+		vmmc-supply = <&reg_1p8v>;
+	};
+
+	sdhi2: sdhi@0xe6870000 {
+		compatible = "renesas,shmobile-sdhi";
+		reg = <0xe6870000 0x100>;
+		interrupt-parent = <&intca>;
+		interrupts = <0x1200 0x1220 0x1240>;
+		vmmc-supply = <&reg_3p3v>;
+	};
+
+	flash@2000000 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "cfi-flash";
+		reg = <0x20000000 0x8000000>;
+		bank-width = <2>;
+		partition@0 {
+			label = "loader";
+			reg = <0 0x80000>;
+		};
+		partition@1 {
+			label = "bootenv";
+			reg = <0x80000 0x80000>;
+		};
+		partition@2 {
+			label = "kernel_ro";
+			reg = <0x100000 0x800000>;
+		};
+		partition@3 {
+			label = "kernel";
+			reg = <0x900000 0x800000>;
+		};
+		partition@4 {
+			label = "data";
+			reg = <0x1100000 0x6f00000>;
+		};
+	};
+};
diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 9255546..c25784b 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -76,6 +76,14 @@ config MACH_MACKEREL
 	select SND_SOC_AK4642 if SND_SIMPLE_CARD
 	select USE_OF
 
+config MACH_MACKEREL_REFERENCE
+	bool "mackerel board - Reference Device Tree Implementation"
+	depends on ARCH_SH7372
+	select ARCH_REQUIRE_GPIOLIB
+	select REGULATOR_FIXED_VOLTAGE if REGULATOR
+	select SND_SOC_AK4642 if SND_SIMPLE_CARD
+	select USE_OF
+
 config MACH_KOTA2
 	bool "KOTA2 board"
 	depends on ARCH_SH73A0
diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index e1fac57..7723a8f 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_ARCH_SH73A0)	+= pm-sh73a0.o
 obj-$(CONFIG_MACH_AP4EVB)	+= board-ap4evb.o
 obj-$(CONFIG_MACH_AG5EVM)	+= board-ag5evm.o
 obj-$(CONFIG_MACH_MACKEREL)	+= board-mackerel.o
+obj-$(CONFIG_MACH_MACKEREL_REFERENCE)	+= board-mackerel-reference.o
 obj-$(CONFIG_MACH_KOTA2)	+= board-kota2.o
 obj-$(CONFIG_MACH_BONITO)	+= board-bonito.o
 obj-$(CONFIG_MACH_MARZEN)	+= board-marzen.o
diff --git a/arch/arm/mach-shmobile/board-mackerel-reference.c b/arch/arm/mach-shmobile/board-mackerel-reference.c
new file mode 100644
index 0000000..1d83653
--- /dev/null
+++ b/arch/arm/mach-shmobile/board-mackerel-reference.c
@@ -0,0 +1,122 @@
+/*
+ * mackerel board support - Reference Device Tree Implementation
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Copyright (C) 2010 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * based on ap4evb
+ * Copyright (C) 2010  Magnus Damm
+ * Copyright (C) 2008  Yoshihiro Shimoda
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include <mach/common.h>
+#include <mach/irqs.h>
+#include <mach/sh7372.h>
+
+#include <asm/mach/arch.h>
+
+#define IRQ7 evt2irq(0x02e0)
+#define IRQ21 evt2irq(0x32a0)
+
+static void __init mackerel_init(void)
+{
+	sh7372_add_standard_devices_dt();
+
+	/* External clock source */
+	clk_set_rate(&sh7372_dv_clki_clk, 27000000);
+
+	sh7372_pinmux_init();
+
+	/* enable SCIFA0 */
+	gpio_request(GPIO_FN_SCIFA0_TXD, NULL);
+	gpio_request(GPIO_FN_SCIFA0_RXD, NULL);
+
+	/* enable SMSC911X */
+	gpio_request(GPIO_FN_CS5A,	NULL);
+	gpio_request(GPIO_FN_IRQ6_39,	NULL);
+
+	/* enable Touchscreen */
+	gpio_request(GPIO_FN_IRQ7_40,	NULL);
+	irq_set_irq_type(IRQ7, IRQ_TYPE_LEVEL_LOW);
+
+	/* enable Accelerometer */
+	gpio_request(GPIO_FN_IRQ21,	NULL);
+	irq_set_irq_type(IRQ21, IRQ_TYPE_LEVEL_HIGH);
+
+	/* enable SDHI0 */
+	gpio_request(GPIO_FN_SDHIWP0, NULL);
+	gpio_request(GPIO_FN_SDHICMD0, NULL);
+	gpio_request(GPIO_FN_SDHICLK0, NULL);
+	gpio_request(GPIO_FN_SDHID0_3, NULL);
+	gpio_request(GPIO_FN_SDHID0_2, NULL);
+	gpio_request(GPIO_FN_SDHID0_1, NULL);
+	gpio_request(GPIO_FN_SDHID0_0, NULL);
+
+	/* SDHI0 PORT172 card-detect IRQ26 */
+	gpio_request(GPIO_FN_IRQ26_172, NULL);
+
+	/* enable SDHI1 */
+	gpio_request(GPIO_FN_SDHICMD1, NULL);
+	gpio_request(GPIO_FN_SDHICLK1, NULL);
+	gpio_request(GPIO_FN_SDHID1_3, NULL);
+	gpio_request(GPIO_FN_SDHID1_2, NULL);
+	gpio_request(GPIO_FN_SDHID1_1, NULL);
+	gpio_request(GPIO_FN_SDHID1_0, NULL);
+
+	/* enable SDHI2 */
+	gpio_request(GPIO_FN_SDHICMD2, NULL);
+	gpio_request(GPIO_FN_SDHICLK2, NULL);
+	gpio_request(GPIO_FN_SDHID2_3, NULL);
+	gpio_request(GPIO_FN_SDHID2_2, NULL);
+	gpio_request(GPIO_FN_SDHID2_1, NULL);
+	gpio_request(GPIO_FN_SDHID2_0, NULL);
+
+	/* card detect pin for microSD slot (CN23) */
+	gpio_request(GPIO_PORT162, NULL);
+	gpio_direction_input(GPIO_PORT162);
+
+	/* MMCIF */
+	gpio_request(GPIO_FN_MMCD0_0, NULL);
+	gpio_request(GPIO_FN_MMCD0_1, NULL);
+	gpio_request(GPIO_FN_MMCD0_2, NULL);
+	gpio_request(GPIO_FN_MMCD0_3, NULL);
+	gpio_request(GPIO_FN_MMCD0_4, NULL);
+	gpio_request(GPIO_FN_MMCD0_5, NULL);
+	gpio_request(GPIO_FN_MMCD0_6, NULL);
+	gpio_request(GPIO_FN_MMCD0_7, NULL);
+	gpio_request(GPIO_FN_MMCCMD0, NULL);
+	gpio_request(GPIO_FN_MMCCLK0, NULL);
+}
+
+static const char *mackerel_compat_dt[] __initdata = {
+	"renesas,mackerel-reference",
+	NULL,
+};
+
+DT_MACHINE_START(MACKEREL, "mackerel-reference")
+	.map_io		= sh7372_map_io,
+	.init_early	= sh7372_add_early_devices_dt,
+	.init_irq	= sh7372_init_irq_of,
+	.handle_irq	= shmobile_handle_irq_intc,
+	.init_machine	= mackerel_init,
+	.init_late	= sh7372_pm_init_late,
+	.timer		= &shmobile_timer,
+	.dt_compat	= mackerel_compat_dt,
+MACHINE_END
