[PATCH] RiOTboard: add new board

[Lucas Stach <dev@lynxeye.de>]

From: Eric Bénard <eric@eukrea.com>

this board is produced by Embest/Element 14 and is based on i.MX6 Solo
The following features are tested :
- UART2 (console)
- eMMC
- SDCard
- uSDCard
- Ethernet
- USB Host (through 4 ports hub)
- I2C 1/2/3
- 2 LEDs

Boot on eMMC and through USB loader are tested.

For more informations on this board : http://www.riotboard.org/

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
v2 lst:
- rebase to current master
- add barebox update handler
- add to imx_v7_defconfig
---
 arch/arm/boards/Makefile                           |   1 +
 arch/arm/boards/embest-riotboard/Makefile          |   3 +
 arch/arm/boards/embest-riotboard/board.c           |  90 +++++
 .../flash-header-embest-riotboard.imxcfg           |  62 ++++
 arch/arm/boards/embest-riotboard/lowlevel.c        |  43 +++
 arch/arm/configs/imx_v7_defconfig                  |   1 +
 arch/arm/dts/Makefile                              |   4 +-
 arch/arm/dts/imx6s-riotboard.dts                   | 391 +++++++++++++++++++++
 arch/arm/mach-imx/Kconfig                          |   4 +
 images/Makefile.imx                                |   5 +
 10 files changed, 603 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boards/embest-riotboard/Makefile
 create mode 100644 arch/arm/boards/embest-riotboard/board.c
 create mode 100644 arch/arm/boards/embest-riotboard/flash-header-embest-riotboard.imxcfg
 create mode 100644 arch/arm/boards/embest-riotboard/lowlevel.c
 create mode 100644 arch/arm/dts/imx6s-riotboard.dts

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 16742d9..eb35e6b 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_MACH_EDB9307)			+= edb93xx/
 obj-$(CONFIG_MACH_EDB9315A)			+= edb93xx/
 obj-$(CONFIG_MACH_EDB9315)			+= edb93xx/
 obj-$(CONFIG_MACH_EFIKA_MX_SMARTBOOK)		+= efika-mx-smartbook/
+obj-$(CONFIG_MACH_EMBEST_RIOTBOARD)		+= embest-riotboard/
 obj-$(CONFIG_MACH_EUKREA_CPUIMX25)		+= eukrea_cpuimx25/
 obj-$(CONFIG_MACH_EUKREA_CPUIMX27)		+= eukrea_cpuimx27/
 obj-$(CONFIG_MACH_EUKREA_CPUIMX35)		+= eukrea_cpuimx35/
diff --git a/arch/arm/boards/embest-riotboard/Makefile b/arch/arm/boards/embest-riotboard/Makefile
new file mode 100644
index 0000000..9f8e1f2
--- /dev/null
+++ b/arch/arm/boards/embest-riotboard/Makefile
@@ -0,0 +1,3 @@
+obj-y += board.o flash-header-embest-riotboard.dcd.o
+extra-y += flash-header-embest-riotboard.dcd.S flash-header-embest-riotboard.dcd
+lwl-y += lowlevel.o
diff --git a/arch/arm/boards/embest-riotboard/board.c b/arch/arm/boards/embest-riotboard/board.c
new file mode 100644
index 0000000..638d0f6
--- /dev/null
+++ b/arch/arm/boards/embest-riotboard/board.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2014 Eric Bénard <eric@eukrea.com>
+ * Copyright (C) 2013 Lucas Stach <l.stach@pengutronix.de>
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <asm/armlinux.h>
+#include <asm/io.h>
+#include <bootsource.h>
+#include <common.h>
+#include <environment.h>
+#include <envfs.h>
+#include <gpio.h>
+#include <init.h>
+#include <mach/generic.h>
+#include <mach/imx6-regs.h>
+#include <mach/imx6.h>
+#include <mach/bbu.h>
+#include <mfd/imx6q-iomuxc-gpr.h>
+#include <sizes.h>
+#include <linux/phy.h>
+
+static int ar8035_phy_fixup(struct phy_device *dev)
+{
+	u16 val;
+
+	/* Ar803x phy SmartEEE feature cause link status generates glitch,
+	 * which cause ethernet link down/up issue, so disable SmartEEE
+	 */
+	phy_write(dev, 0xd, 0x3);
+	phy_write(dev, 0xe, 0x805d);
+	phy_write(dev, 0xd, 0x4003);
+
+	val = phy_read(dev, 0xe);
+	phy_write(dev, 0xe, val & ~(1 << 8));
+
+	/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
+	phy_write(dev, 0xd, 0x7);
+	phy_write(dev, 0xe, 0x8016);
+	phy_write(dev, 0xd, 0x4007);
+
+	val = phy_read(dev, 0xe);
+	val &= 0xffe3;
+	val |= 0x18;
+	phy_write(dev, 0xe, val);
+
+	/* introduce tx clock delay */
+	phy_write(dev, 0x1d, 0x5);
+	val = phy_read(dev, 0x1e);
+	val |= 0x0100;
+	phy_write(dev, 0x1e, val);
+
+	return 0;
+}
+
+static int riotboard_device_init(void)
+{
+	if (!of_machine_is_compatible("embest,riotboard"))
+		return 0;
+
+	phy_register_fixup_for_uid(0x004dd072, 0xffffffef, ar8035_phy_fixup);
+
+	imx6_bbu_internal_mmc_register_handler("emmc", "/dev/mmc3.barebox",
+			BBU_HANDLER_FLAG_DEFAULT, NULL, 0, 0);
+
+	return 0;
+}
+device_initcall(riotboard_device_init);
+
+static int riotboard_lwl_init(void)
+{
+	if (!of_machine_is_compatible("embest,riotboard"))
+		return 0;
+
+	barebox_set_hostname("riotboard");
+
+	imx6_init_lowlevel();
+
+	return 0;
+}
+postcore_initcall(riotboard_lwl_init);
diff --git a/arch/arm/boards/embest-riotboard/flash-header-embest-riotboard.imxcfg b/arch/arm/boards/embest-riotboard/flash-header-embest-riotboard.imxcfg
new file mode 100644
index 0000000..04e162b
--- /dev/null
+++ b/arch/arm/boards/embest-riotboard/flash-header-embest-riotboard.imxcfg
@@ -0,0 +1,62 @@
+loadaddr 0x20000000
+soc imx6
+dcdofs 0x400
+wm 32 0x020e0774 0x000c0000
+wm 32 0x020e0754 0x00000000
+wm 32 0x020e04ac 0x00000030
+wm 32 0x020e04b0 0x00000030
+wm 32 0x020e0464 0x00000030
+wm 32 0x020e0490 0x00000030
+wm 32 0x020e074c 0x00000030
+wm 32 0x020e0494 0x00000030
+wm 32 0x020e04a0 0x00000000
+wm 32 0x020e04b4 0x00000030
+wm 32 0x020e04b8 0x00000030
+wm 32 0x020e076c 0x00000030
+wm 32 0x020e0750 0x00020000
+wm 32 0x020e04bc 0x00000028
+wm 32 0x020e04c0 0x00000028
+wm 32 0x020e04c4 0x00000028
+wm 32 0x020e04c8 0x00000028
+wm 32 0x020e0760 0x00020000
+wm 32 0x020e0764 0x00000028
+wm 32 0x020e0770 0x00000028
+wm 32 0x020e0778 0x00000028
+wm 32 0x020e077c 0x00000028
+wm 32 0x020e0470 0x00000028
+wm 32 0x020e0474 0x00000028
+wm 32 0x020e0478 0x00000028
+wm 32 0x020e047c 0x00000028
+wm 32 0x021b0800 0xa1390003
+wm 32 0x021b080c 0x001f001f
+wm 32 0x021b0810 0x001f001f
+wm 32 0x021b083c 0x421c0216
+wm 32 0x021b0840 0x017b017a
+wm 32 0x021b0848 0x4b4a4e4c
+wm 32 0x021b0850 0x3f3f3334
+wm 32 0x021b081c 0x33333333
+wm 32 0x021b0820 0x33333333
+wm 32 0x021b0824 0x33333333
+wm 32 0x021b0828 0x33333333
+wm 32 0x021b08b8 0x00000800
+wm 32 0x021b0004 0x00020025
+wm 32 0x021b0008 0x00333030
+wm 32 0x021b000c 0x676b5313
+wm 32 0x021b0010 0xb66e8b63
+wm 32 0x021b0014 0x01ff00db
+wm 32 0x021b0018 0x00001740
+wm 32 0x021b001c 0x00008000
+wm 32 0x021b002c 0x000026d2
+wm 32 0x021b0030 0x006b1023
+wm 32 0x021b0040 0x00000027
+wm 32 0x021b0000 0x84190000
+wm 32 0x021b001c 0x04008032
+wm 32 0x021b001c 0x00008033
+wm 32 0x021b001c 0x00048031
+wm 32 0x021b001c 0x05208030
+wm 32 0x021b001c 0x04008040
+wm 32 0x021b0020 0x00005800
+wm 32 0x021b0818 0x00011117
+wm 32 0x021b0004 0x00025565
+wm 32 0x021b0404 0x00011006
+wm 32 0x021b001c 0x00000000
diff --git a/arch/arm/boards/embest-riotboard/lowlevel.c b/arch/arm/boards/embest-riotboard/lowlevel.c
new file mode 100644
index 0000000..814658a
--- /dev/null
+++ b/arch/arm/boards/embest-riotboard/lowlevel.c
@@ -0,0 +1,43 @@
+#include <debug_ll.h>
+#include <common.h>
+#include <sizes.h>
+#include <io.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <asm/sections.h>
+#include <asm/cache.h>
+#include <asm/mmu.h>
+#include <mach/imx6-mmdc.h>
+#include <mach/imx6.h>
+
+static inline void setup_uart(void)
+{
+	/* Enable UART for lowlevel debugging purposes */
+	writel(0x00000000, 0x021e8080);
+	writel(0x00004027, 0x021e8084);
+	writel(0x00000704, 0x021e8088);
+	writel(0x00000a81, 0x021e8090);
+	writel(0x0000002b, 0x021e809c);
+	writel(0x00013880, 0x021e80b0);
+	writel(0x0000047f, 0x021e80a4);
+	writel(0x0000c34f, 0x021e80a8);
+	writel(0x00000001, 0x021e8080);
+}
+
+extern char __dtb_imx6s_riotboard_start[];
+
+ENTRY_FUNCTION(start_imx6s_riotboard, r0, r1, r2)
+{
+	uint32_t fdt;
+
+	arm_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL)) {
+		writel(0x4, 0x020e016c);
+		setup_uart();
+		putc_ll('a');
+	}
+
+	fdt = (uint32_t)__dtb_imx6s_riotboard_start - get_runtime_offset();
+	barebox_arm_entry(0x10000000, SZ_1G, fdt);
+}
diff --git a/arch/arm/configs/imx_v7_defconfig b/arch/arm/configs/imx_v7_defconfig
index f29c968..2c97512 100644
--- a/arch/arm/configs/imx_v7_defconfig
+++ b/arch/arm/configs/imx_v7_defconfig
@@ -15,6 +15,7 @@ CONFIG_MACH_SABRELITE=y
 CONFIG_MACH_SABRESD=y
 CONFIG_MACH_NITROGEN6X=y
 CONFIG_MACH_SOLIDRUN_HUMMINGBOARD=y
+CONFIG_MACH_EMBEST_RIOTBOARD=y
 CONFIG_MACH_UDOO=y
 CONFIG_MACH_VARISCITE_MX6=y
 CONFIG_IMX_IIM=y
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b45c174..e7f9b80 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -27,7 +27,8 @@ dtb-$(CONFIG_ARCH_IMX6) += imx6q-gk802.dtb \
 	imx6q-nitrogen6x.dtb \
 	imx6dl-nitrogen6x.dtb \
 	imx6q-udoo.dtb \
-	imx6q-var-custom.dtb
+	imx6q-var-custom.dtb \
+	imx6s-riotboard.dtb
 dtb-$(CONFIG_ARCH_MVEBU) += dove-cubox-bb.dtb
 dtb-$(CONFIG_ARCH_SOCFPGA) += socfpga_cyclone5_sockit.dtb \
 	socfpga_cyclone5_socrates.dtb
@@ -40,6 +41,7 @@ obj-$(CONFIG_BUILTIN_DTB) += $(BUILTIN_DTB).dtb.o
 
 pbl-$(CONFIG_MACH_BEAGLEBONE) += am335x-bone.dtb.o am335x-boneblack.dtb.o
 pbl-$(CONFIG_MACH_EFIKA_MX_SMARTBOOK) += imx51-genesi-efika-sb.dtb.o
+pbl-$(CONFIG_MACH_EMBEST_RIOTBOARD) += imx6s-riotboard.dtb.o
 pbl-$(CONFIG_MACH_FREESCALE_MX51_PDK) += imx51-babbage.dtb.o
 pbl-$(CONFIG_MACH_FREESCALE_MX53_LOCO) += imx53-qsb.dtb.o imx53-qsrb.dtb.o
 pbl-$(CONFIG_MACH_FREESCALE_MX53_VMX53) += imx53-voipac-bsb.dtb.o
diff --git a/arch/arm/dts/imx6s-riotboard.dts b/arch/arm/dts/imx6s-riotboard.dts
new file mode 100644
index 0000000..14d0b80
--- /dev/null
+++ b/arch/arm/dts/imx6s-riotboard.dts
@@ -0,0 +1,391 @@
+/*
+ * Copyright (C) 2014 Eric Bénard - Eukréa Electromatique
+ *
+ * The code contained herein is licensed under the GNU General Public
+ * License version 2.
+ */
+/dts-v1/;
+
+#include "imx6dl.dtsi"
+
+/ {
+	model = "RIoTboard Solo";
+	compatible = "embest,riotboard", "fsl,imx6dl";
+
+	chosen {
+		linux,stdout-path = &uart2;
+
+		environment@0 {
+			compatible = "barebox,environment";
+			device-path = &usdhc4, "partname:barebox-environment";
+		};
+	};
+
+	memory {
+		reg = <0x10000000 0x40000000>;
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		d45 {
+			label = "d45";
+			gpios = <&gpio5 2 1>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		d46 {
+			label = "d46";
+			gpios = <&gpio3 28 1>;
+			linux,default-trigger = "default-on";
+		};
+	};
+
+
+	regulators {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		reg_3p3v: regulator@1 {
+			compatible = "regulator-fixed";
+			reg = <1>;
+			regulator-name = "3P3V";
+			regulator-min-microvolt = <3300000>;
+			regulator-max-microvolt = <3300000>;
+			regulator-always-on;
+		};
+	};
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_hog>;
+
+	imx6s-riotboard {
+		pinctrl_hog: hoggrp {
+			fsl,pins = <
+				MX6QDL_PAD_EIM_A25__GPIO5_IO02		0x80000000 /* LED D45 */
+				MX6QDL_PAD_EIM_D28__GPIO3_IO28		0x80000000 /* LED D46 */
+				MX6QDL_PAD_DISP0_DAT22__GPIO5_IO16	0x80000000 /* PMIC_INT_B */
+				MX6QDL_PAD_GPIO_0__CCM_CLKO1		0x030b0 /* CAM_MCLK + SGTL_MCLK */
+			>;
+		};
+		pinctrl_uart2: uart2grp {
+			fsl,pins = <MX6QDL_UART2_PINGRP1>;
+		};
+		pinctrl_rgmii_ar8035: rgmii_ar8035 {
+			fsl,pins = <
+				MX6QDL_PAD_ENET_MDIO__ENET_MDIO		0x1b0b0
+				MX6QDL_PAD_ENET_MDC__ENET_MDC		0x1b0b0
+				/* AR8035 reset */
+				MX6QDL_PAD_EIM_D31__GPIO3_IO31		0x130b0
+				/* AR8035 interrupt */
+				MX6QDL_PAD_ENET_TX_EN__GPIO1_IO28	0x80000000
+				/* GPIO16 -> AR8035 25MHz */
+				MX6QDL_PAD_GPIO_16__ENET_REF_CLK	0xc0000000
+				MX6QDL_PAD_RGMII_TXC__RGMII_TXC		0x80000000
+				MX6QDL_PAD_RGMII_TD0__RGMII_TD0		0x1b0b0
+				MX6QDL_PAD_RGMII_TD1__RGMII_TD1		0x1b0b0
+				MX6QDL_PAD_RGMII_TD2__RGMII_TD2		0x1b0b0
+				MX6QDL_PAD_RGMII_TD3__RGMII_TD3		0x1b0b0
+				MX6QDL_PAD_RGMII_TX_CTL__RGMII_TX_CTL	0x1b0b0
+				/* AR8035 CLK_25M --> ENET_REF_CLK (V22) */
+				MX6QDL_PAD_ENET_REF_CLK__ENET_TX_CLK	0x0a0b1
+				/* AR8035 pin strapping: IO voltage: pull up */
+				MX6QDL_PAD_RGMII_RXC__RGMII_RXC		0x1b0b0
+				/* AR8035 pin strapping: PHYADDR#0: pull down */
+				MX6QDL_PAD_RGMII_RD0__RGMII_RD0		0x130b0
+				/* AR8035 pin strapping: PHYADDR#1: pull down */
+				MX6QDL_PAD_RGMII_RD1__RGMII_RD1		0x130b0
+				/* AR8035 pin strapping: MODE#1: pull up */
+				MX6QDL_PAD_RGMII_RD2__RGMII_RD2		0x1b0b0
+				/* AR8035 pin strapping: MODE#3: pull up */
+				MX6QDL_PAD_RGMII_RD3__RGMII_RD3		0x1b0b0
+				/* AR8035 pin strapping: MODE#0: pull down */
+				MX6QDL_PAD_RGMII_RX_CTL__RGMII_RX_CTL	0x130b0
+			>;
+		};
+		pinctrl_usdhc4: usdhc4grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD4_CLK__SD4_CLK			0x80000000
+				MX6QDL_PAD_SD4_CMD__SD4_CMD			0x80000000
+				MX6QDL_PAD_SD4_DAT0__SD4_DATA0			0x80000000
+				MX6QDL_PAD_SD4_DAT1__SD4_DATA1			0x80000000
+				MX6QDL_PAD_SD4_DAT2__SD4_DATA2			0x80000000
+				MX6QDL_PAD_SD4_DAT3__SD4_DATA3			0x80000000
+			>;
+		};
+		pinctrl_usdhc2: usdhc2grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD2_CLK__SD2_CLK			0x80000000
+				MX6QDL_PAD_SD2_CMD__SD2_CMD			0x80000000
+				MX6QDL_PAD_SD2_DAT0__SD2_DATA0			0x80000000
+				MX6QDL_PAD_SD2_DAT1__SD2_DATA1			0x80000000
+				MX6QDL_PAD_SD2_DAT2__SD2_DATA2			0x80000000
+				MX6QDL_PAD_SD2_DAT3__SD2_DATA3			0x80000000
+				MX6QDL_PAD_GPIO_2__GPIO1_IO02			0x80000000
+				MX6QDL_PAD_GPIO_4__GPIO1_IO04			0x80000000
+			>;
+		};
+		pinctrl_usdhc3: usdhc3grp {
+			fsl,pins = <
+				MX6QDL_PAD_SD3_CMD__SD3_CMD			0x80000000
+				MX6QDL_PAD_SD3_CLK__SD3_CLK			0x80000000
+				MX6QDL_PAD_SD3_DAT0__SD3_DATA0			0x80000000
+				MX6QDL_PAD_SD3_DAT1__SD3_DATA1			0x80000000
+				MX6QDL_PAD_SD3_DAT2__SD3_DATA2			0x80000000
+				MX6QDL_PAD_SD3_DAT3__SD3_DATA3			0x80000000
+				MX6QDL_PAD_SD3_DAT4__GPIO7_IO01			0x80000000
+				MX6QDL_PAD_SD3_DAT5__GPIO7_IO00			0x80000000
+			>;
+		};
+		pinctrl_usbotg: usbotggrp {
+			fsl,pins = <
+				MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID		0x80000000
+				MX6QDL_PAD_EIM_D22__USB_OTG_PWR			0x80000000
+				MX6QDL_PAD_EIM_D21__USB_OTG_OC			0x80000000
+			>;
+		};
+		pinctrl_i2c1_2: i2c1grp-2 {
+			fsl,pins = <
+				MX6QDL_PAD_CSI0_DAT9__I2C1_SCL 0x4001b8b1
+				MX6QDL_PAD_CSI0_DAT8__I2C1_SDA 0x4001b8b1
+			>;
+		};
+		pinctrl_i2c2_2: i2c2grp-2 {
+			fsl,pins = <
+				MX6QDL_PAD_KEY_COL3__I2C2_SCL 0x4001b8b1
+				MX6QDL_PAD_KEY_ROW3__I2C2_SDA 0x4001b8b1
+			>;
+		};
+		pinctrl_i2c3_2: i2c3grp-2 {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_5__I2C3_SCL 0x4001b8b1
+				MX6QDL_PAD_GPIO_6__I2C3_SDA 0x4001b8b1
+			>;
+		};
+		pinctrl_i2c4_2: i2c4grp-2 {
+			fsl,pins = <
+				MX6QDL_PAD_GPIO_7__I2C4_SCL 0x4001b8b1
+				MX6QDL_PAD_GPIO_8__I2C4_SDA 0x4001b8b1
+			>;
+		};
+	};
+};
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart2>;
+	status = "okay";
+};
+
+&fec {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_rgmii_ar8035>;
+	phy-mode = "rgmii";
+	phy-reset-duration = <2>;
+	phy-reset-gpios = <&gpio3 31 0>;
+	status = "okay";
+};
+
+&usdhc2 {
+	/* SD card socket - bottom */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usdhc2>;
+	bus-width = <4>;
+	cd-gpios = <&gpio1 4 0>;
+	wp-gpios = <&gpio1 2 0>;
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <1>;
+};
+
+&usdhc3 {
+	/* uSD card socket - top */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usdhc3>;
+	bus-width = <4>;
+	cd-gpios = <&gpio7 0 0>;
+	wp-gpios = <&gpio7 1 0>;
+	status = "okay";
+	#address-cells = <1>;
+	#size-cells = <1>;
+};
+
+&usdhc4 {
+	/* eMMC */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usdhc4>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	partition@0 {
+		label = "barebox";
+		reg = <0x0 0x80000>;
+	};
+
+	partition@1 {
+		label = "barebox-environment";
+		reg = <0x80000 0x80000>;
+	};
+};
+
+&usbh1 {
+	status = "okay";
+	phy_type = "utmi";
+	disable-over-current;
+};
+
+&usbotg {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usbotg>;
+	phy_type = "utmi";
+	dr_mode = "peripheral";
+	otg_id_pin_select_change;
+	status = "okay";
+};
+
+&i2c1 {
+	status = "okay";
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c1_2>;
+
+	pmic: pf0100@08 {
+		compatible = "pf0100-regulator";
+		reg = <0x08>;
+		interrupt-parent = <&gpio5>;
+		interrupts = <16 8>;
+
+		regulators {
+			reg_vddcore: sw1ab {
+				regulator-min-microvolt = <300000>;
+				regulator-max-microvolt = <1875000>;
+				regulator-always-on;
+			};
+
+			reg_vddsoc: sw1c {
+				regulator-min-microvolt = <300000>;
+				regulator-max-microvolt = <1875000>;
+				regulator-always-on;
+			};
+
+			reg_gen_3v3: sw2 {
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			reg_ddr_1v5a: sw3a {
+				regulator-min-microvolt = <400000>;
+				regulator-max-microvolt = <1975000>;
+				regulator-always-on;
+			};
+
+			reg_ddr_1v5b: sw3b {
+				regulator-min-microvolt = <400000>;
+				regulator-max-microvolt = <1975000>;
+				regulator-always-on;
+			};
+
+			reg_ddr_vtt: sw4 {
+				regulator-min-microvolt = <400000>;
+				regulator-max-microvolt = <1975000>;
+				regulator-always-on;
+			};
+
+			reg_5v_600mA: swbst {
+				regulator-min-microvolt = <5000000>;
+				regulator-max-microvolt = <5150000>;
+				regulator-always-on;
+			};
+
+			reg_snvs_3v: vsnvs {
+				regulator-min-microvolt = <1500000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
+			};
+
+			reg_vrefddr: vrefddr {
+				regulator-min-microvolt = <750000>;
+				regulator-max-microvolt = <750000>;
+				regulator-always-on;
+			};
+
+			reg_vgen1_1v5: vgen1 {
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1550000>;
+				/* not used */
+			};
+
+			reg_vgen2_1v2_eth: vgen2 {
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <1550000>;
+				regulator-always-on;
+			};
+
+			reg_vgen3_2v8: vgen3 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			reg_vgen4_1v8: vgen4 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			reg_vgen5_2v5_sgtl: vgen5 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+
+			reg_vgen6_3v3: vgen6 {
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+			};
+		};
+	};
+
+	codec: sgtl5000@0a {
+		compatible = "fsl,sgtl5000";
+		reg = <0x0a>;
+		clocks = <&clks 201>;
+		VDDA-supply = <&reg_vgen5_2v5_sgtl>;
+		VDDIO-supply = <&reg_3p3v>;
+	};
+};
+
+&i2c2 {
+	status = "okay";
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c2_2>;
+};
+
+&i2c3 {
+	status = "okay";
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3_2>;
+};
+
+&i2c4 {
+	status = "okay";
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c4_2>;
+};
+
+&ocotp {
+	barebox,provide-mac-address = <&fec 0x620>;
+};
+
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index d40c944..40c07f4 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -250,6 +250,10 @@ config MACH_SOLIDRUN_HUMMINGBOARD
 	bool "SolidRun Hummingboard"
 	select ARCH_IMX6
 
+config MACH_EMBEST_RIOTBOARD
+	bool "Embest RIoTboard"
+	select ARCH_IMX6
+
 config MACH_UDOO
 	bool "Freescale i.MX6 UDOO Board"
 	select ARCH_IMX6
diff --git a/images/Makefile.imx b/images/Makefile.imx
index 06794fd..17fcfbf 100644
--- a/images/Makefile.imx
+++ b/images/Makefile.imx
@@ -166,3 +166,8 @@ pblx-$(CONFIG_MACH_VARISCITE_MX6) += start_variscite_custom
 CFG_start_variscite_custom.pblx.imximg = $(board)/variscite-mx6/flash-header-variscite.imxcfg
 FILE_barebox-variscite-custom.img = start_variscite_custom.pblx.imximg
 image-$(CONFIG_MACH_VARISCITE_MX6) += barebox-variscite-custom.img
+
+pblx-$(CONFIG_MACH_EMBEST_RIOTBOARD) += start_imx6s_riotboard
+CFG_start_imx6s_riotboard.pblx.imximg = $(board)/embest-riotboard/flash-header-embest-riotboard.imxcfg
+FILE_barebox-embest-imx6s-riotboard.img = start_imx6s_riotboard.pblx.imximg
+image-$(CONFIG_MACH_EMBEST_RIOTBOARD) += barebox-embest-imx6s-riotboard.img
-- 
1.9.0


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