B2120 HDK is the reference board for STiH407 SoC.
It has the following characteristics:
  - 1GB DDR3
  - 8GB eMMC / SD-Card slot
  - 32MB NOR Flash
  - 1 x Gbit Ethernet
  - 1 x USB 3.0 port
  - 1 x Mini-PCIe
  - 1 x SATA
  - 1 x HDMI output
  - 1 x HDMI input
  - 1 x SPDIF

This patch only introduces basic functionnalities, such as I2C and UART.

Acked-by: Giuseppe Cavallaro <redacted>
Acked-by: Lee Jones <redacted>
Signed-off-by: Giuseppe Cavallaro <redacted>
Signed-off-by: Maxime Coquelin <redacted>
---
  arch/arm/boot/dts/Makefile          |  3 +-
  arch/arm/boot/dts/stih407-b2120.dts | 78 +++++++++++++++++++++++++++++++++++++
  2 files changed, 80 insertions(+), 1 deletion(-)
  create mode 100644 arch/arm/boot/dts/stih407-b2120.dts

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 12455cf..f760a88 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile

@@ -317,7 +317,8 @@ dtb-$(CONFIG_ARCH_SPEAR6XX)+= spear600-evb.dtb
  dtb-$(CONFIG_ARCH_STI)+= stih415-b2000.dtb \
  	stih416-b2000.dtb \
  	stih415-b2020.dtb \
-	stih416-b2020.dtb
+	stih416-b2020.dtb \
+	stih407-b2120.dtb
  dtb-$(CONFIG_ARCH_SUNXI) += \
  	sun4i-a10-a1000.dtb \
  	sun4i-a10-cubieboard.dtb \

diff --git a/arch/arm/boot/dts/stih407-b2120.dts b/arch/arm/boot/dts/stih407-b2120.dts
new file mode 100644
index 0000000..9c97da4
--- /dev/null
+++ b/arch/arm/boot/dts/stih407-b2120.dts

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics (R&D) Limited.
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+#include "stih407.dtsi"
+/ {
+	model = "STiH407 B2120";
+	compatible = "st,stih407", "st,stih407-b2120";
+
+	chosen {
+		bootargs = "console=ttyAS0,115200";
+		linux,stdout-path = &sbc_serial0;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x40000000 0x80000000>;
+	};
+
+	aliases {
+		ttyAS0 = &sbc_serial0;
+	};
+
+	soc {
+		sbc_serial0: serial at 9530000 {
+			status = "okay";
+		};
+
+		leds {
+			compatible = "gpio-leds";
+			red {
+				#gpio-cells = <2>;
+				label = "Front Panel LED";
+				gpios = <&PIO4 1 0>;
+				linux,default-trigger = "heartbeat";
+			};
+			green {
+				#gpio-cells = <2>;
+				gpios = <&PIO1 3 0>;
+				default-state = "off";
+			};
+		};
+
+		i2c at 9842000 {
+			status = "okay";
+		};
+
+		i2c at 9843000 {
+			status = "okay";
+		};
+
+		i2c at 9844000 {
+			status = "okay";
+		};
+
+		i2c at 9845000 {
+			status = "okay";
+		};
+
+		i2c at 9540000 {
+			status = "okay";
+		};
+
+		/* SSC11 to HDMI */
+		i2c at 9541000 {
+			status = "okay";
+			/* HDMI V1.3a supports Standard mode only */
+			clock-frequency = <100000>;
+			st,i2c-min-scl-pulse-width-us = <0>;
+			st,i2c-min-sda-pulse-width-us = <5>;
+		};
+	};
+};