Merge branch 'sti/soc' into next/late

From Srinivas Kandagatla <srinivas.kandagatla@st.com>:

This patch-set adds basic support for STMicroelectronics STi series SOCs
which includes STiH415 and STiH416 with B2000 and B2020 board support.

STiH415 and STiH416 are dual-core ARM Cortex-A9 CPU, designed for
use in Set-top-boxes. The SOC support is available in mach-sti which
contains support code for STiH415, STiH416 SOCs including the generic
board support.

The reason for adding two SOCs at this patch set is to show that no new
C code is required for second SOC(STiH416) support.

* sti/soc:
  ARM: stih41x: Add B2020 board support
  ARM: stih41x: Add B2000 board support
  ARM: sti: Add DEBUG_LL console support
  ARM: sti: Add STiH416 SOC support
  ARM: sti: Add STiH415 SOC support

Signed-off-by: Olof Johansson <olof@lixom.net>

25 files changed, 1455 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index aa27704be4e4..9fbdc10fe835 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -991,6 +991,8 @@ source "arch/arm/mach-socfpga/Kconfig"
 
 source "arch/arm/mach-spear/Kconfig"
 
+source "arch/arm/mach-sti/Kconfig"
+
 source "arch/arm/mach-s3c24xx/Kconfig"
 
 if ARCH_S3C64XX
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index fe079417daa2..b3ae502427bf 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -497,6 +497,16 @@ choice
 		  This option selects UART0 on VIA/Wondermedia System-on-a-chip
 		  devices, including VT8500, WM8505, WM8650 and WM8850.
 
+	config DEBUG_STI_UART
+		depends on ARCH_STI
+		bool "Use StiH415/416 ASC for low-level debug"
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on StiH415/416 based platforms like B2000, B2020.
+		  It support UART2 and SBC_UART1.
+
+		  If unsure, say N.
+
 	config DEBUG_LL_UART_NONE
 		bool "No low-level debugging UART"
 		depends on !ARCH_MULTIPLATFORM
@@ -631,6 +641,30 @@ choice
 
 endchoice
 
+choice
+	prompt "Low-level debug console UART"
+	depends on DEBUG_LL && DEBUG_STI_UART
+
+	config STIH41X_DEBUG_ASC2
+		bool "ASC2 UART"
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on STiH415/416 based platforms like b2000, which has
+		  default UART wired up to ASC2.
+
+		  If unsure, say N.
+
+	config STIH41X_DEBUG_SBC_ASC1
+		bool "SBC ASC1 UART"
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on STiH415/416 based platforms like b2020. which has
+		  default UART wired up to SBC ASC1.
+
+		  If unsure, say N.
+
+endchoice
+
 config DEBUG_LL_INCLUDE
 	string
 	default "debug/bcm2835.S" if DEBUG_BCM2835
@@ -657,6 +691,7 @@ config DEBUG_LL_INCLUDE
 				 DEBUG_MMP_UART3
 	default "debug/sirf.S" if DEBUG_SIRFPRIMA2_UART1 || DEBUG_SIRFMARCO_UART1
 	default "debug/socfpga.S" if DEBUG_SOCFPGA_UART
+	default "debug/sti.S" if DEBUG_STI_UART
 	default "debug/sunxi.S" if DEBUG_SUNXI_UART0 || DEBUG_SUNXI_UART1
 	default "debug/tegra.S" if DEBUG_TEGRA_UART
 	default "debug/ux500.S" if DEBUG_UX500_UART
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index b4615aa9bf7a..996bc6d20658 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -192,6 +192,7 @@ machine-$(CONFIG_ARCH_W90X900)		+= w90x900
 machine-$(CONFIG_FOOTBRIDGE)		+= footbridge
 machine-$(CONFIG_ARCH_SOCFPGA)		+= socfpga
 machine-$(CONFIG_PLAT_SPEAR)		+= spear
+machine-$(CONFIG_ARCH_STI)		+= sti
 machine-$(CONFIG_ARCH_VIRT)		+= virt
 machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 60404661585d..3027d0e4aedd 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -182,6 +182,10 @@ dtb-$(CONFIG_ARCH_SPEAR3XX)+= spear300-evb.dtb \
 	spear320-evb.dtb \
 	spear320-hmi.dtb
 dtb-$(CONFIG_ARCH_SPEAR6XX)+= spear600-evb.dtb
+dtb-$(CONFIG_ARCH_STI)+= stih415-b2000.dtb \
+	stih416-b2000.dtb \
+	stih415-b2020.dtb \
+	stih416-b2020.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += \
 	sun4i-a10-cubieboard.dtb \
 	sun4i-a10-mini-xplus.dtb \
diff --git a/arch/arm/boot/dts/st-pincfg.h b/arch/arm/boot/dts/st-pincfg.h
new file mode 100644
index 000000000000..8c45d85ac13e
--- /dev/null
+++ b/arch/arm/boot/dts/st-pincfg.h
@@ -0,0 +1,71 @@
+#ifndef _ST_PINCFG_H_
+#define _ST_PINCFG_H_
+
+/* Alternate functions */
+#define ALT1	1
+#define ALT2	2
+#define ALT3	3
+#define ALT4	4
+#define ALT5	5
+#define ALT6	6
+#define ALT7	7
+
+/* Output enable */
+#define OE			(1 << 27)
+/* Pull Up */
+#define PU			(1 << 26)
+/* Open Drain */
+#define OD			(1 << 26)
+#define RT			(1 << 23)
+#define INVERTCLK		(1 << 22)
+#define CLKNOTDATA		(1 << 21)
+#define DOUBLE_EDGE		(1 << 20)
+#define CLK_A			(0 << 18)
+#define CLK_B			(1 << 18)
+#define CLK_C			(2 << 18)
+#define CLK_D			(3 << 18)
+
+/* User-frendly defines for Pin Direction */
+		/* oe = 0, pu = 0, od = 0 */
+#define IN			(0)
+		/* oe = 0, pu = 1, od = 0 */
+#define IN_PU			(PU)
+		/* oe = 1, pu = 0, od = 0 */
+#define OUT			(OE)
+		/* oe = 1, pu = 0, od = 1 */
+#define BIDIR			(OE | OD)
+		/* oe = 1, pu = 1, od = 1 */
+#define BIDIR_PU		(OE | PU | OD)
+
+/* RETIME_TYPE */
+/*
+ * B Mode
+ * Bypass retime with optional delay parameter
+ */
+#define BYPASS		(0)
+/*
+ * R0, R1, R0D, R1D modes
+ * single-edge data non inverted clock, retime data with clk
+ */
+#define SE_NICLK_IO	(RT)
+/*
+ * RIV0, RIV1, RIV0D, RIV1D modes
+ * single-edge data inverted clock, retime data with clk
+ */
+#define SE_ICLK_IO	(RT | INVERTCLK)
+/*
+ * R0E, R1E, R0ED, R1ED modes
+ * double-edge data, retime data with clk
+ */
+#define DE_IO		(RT | DOUBLE_EDGE)
+/*
+ * CIV0, CIV1 modes with inverted clock
+ * Retiming the clk pins will park clock & reduce the noise within the core.
+ */
+#define ICLK		(RT | CLKNOTDATA | INVERTCLK)
+/*
+ * CLK0, CLK1 modes with non-inverted clock
+ * Retiming the clk pins will park clock & reduce the noise within the core.
+ */
+#define NICLK		(RT | CLKNOTDATA)
+#endif /* _ST_PINCFG_H_ */
diff --git a/arch/arm/boot/dts/stih415-b2000.dts b/arch/arm/boot/dts/stih415-b2000.dts
new file mode 100644
index 000000000000..d4af53160435
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-b2000.dts
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/dts-v1/;
+#include "stih415.dtsi"
+#include "stih41x-b2000.dtsi"
+/ {
+	model = "STiH415 B2000 Board";
+	compatible = "st,stih415", "st,stih415-b2000";
+};
diff --git a/arch/arm/boot/dts/stih415-b2020.dts b/arch/arm/boot/dts/stih415-b2020.dts
new file mode 100644
index 000000000000..442b019e9a3a
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-b2020.dts
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/dts-v1/;
+#include "stih415.dtsi"
+#include "stih41x-b2020.dtsi"
+/ {
+	model = "STiH415 B2020 Board";
+	compatible = "st,stih415", "st,stih415-b2020";
+};
diff --git a/arch/arm/boot/dts/stih415-clock.dtsi b/arch/arm/boot/dts/stih415-clock.dtsi
new file mode 100644
index 000000000000..174c799df741
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-clock.dtsi
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited
+ *
+ * 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.
+ */
+/ {
+	clocks {
+		/*
+		 * Fixed 30MHz oscillator input to SoC
+		 */
+		CLK_SYSIN: CLK_SYSIN {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <30000000>;
+		};
+
+		/*
+		 * ARM Peripheral clock for timers
+		 */
+		arm_periph_clk: arm_periph_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <500000000>;
+		};
+
+		/*
+		 * Bootloader initialized system infrastructure clock for
+		 * serial devices.
+		 */
+		CLKS_ICN_REG_0: CLKS_ICN_REG_0 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <100000000>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih415-pinctrl.dtsi b/arch/arm/boot/dts/stih415-pinctrl.dtsi
new file mode 100644
index 000000000000..1d322b24d1e4
--- /dev/null
+++ b/arch/arm/boot/dts/stih415-pinctrl.dtsi
@@ -0,0 +1,268 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+#include "st-pincfg.h"
+/ {
+
+	aliases {
+		gpio0	= &PIO0;
+		gpio1	= &PIO1;
+		gpio2	= &PIO2;
+		gpio3	= &PIO3;
+		gpio4	= &PIO4;
+		gpio5	= &PIO5;
+		gpio6	= &PIO6;
+		gpio7	= &PIO7;
+		gpio8	= &PIO8;
+		gpio9	= &PIO9;
+		gpio10	= &PIO10;
+		gpio11	= &PIO11;
+		gpio12	= &PIO12;
+		gpio13	= &PIO13;
+		gpio14	= &PIO14;
+		gpio15	= &PIO15;
+		gpio16	= &PIO16;
+		gpio17	= &PIO17;
+		gpio18	= &PIO18;
+		gpio19	= &PIO100;
+		gpio20	= &PIO101;
+		gpio21	= &PIO102;
+		gpio22	= &PIO103;
+		gpio23	= &PIO104;
+		gpio24	= &PIO105;
+		gpio25	= &PIO106;
+		gpio26	= &PIO107;
+	};
+
+	soc {
+		pin-controller-sbc {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih415-sbc-pinctrl";
+			st,syscfg	= <&syscfg_sbc>;
+			ranges 		= <0 0xfe610000 0x5000>;
+
+			PIO0: gpio@fe610000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO0";
+			};
+			PIO1: gpio@fe611000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO1";
+			};
+			PIO2: gpio@fe612000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO2";
+			};
+			PIO3: gpio@fe613000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO3";
+			};
+			PIO4: gpio@fe614000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO4";
+			};
+
+			sbc_serial1 {
+				pinctrl_sbc_serial1:sbc_serial1 {
+					st,pins {
+						tx	= <&PIO2 6 ALT3 OUT>;
+						rx	= <&PIO2 7 ALT3 IN>;
+					};
+				};
+			};
+		};
+
+		pin-controller-front {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih415-front-pinctrl";
+			st,syscfg	= <&syscfg_front>;
+			ranges		= <0 0xfee00000 0x8000>;
+
+			PIO5: gpio@fee00000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO5";
+			};
+			PIO6: gpio@fee01000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO6";
+			};
+			PIO7: gpio@fee02000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO7";
+			};
+			PIO8: gpio@fee03000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO8";
+			};
+			PIO9: gpio@fee04000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO9";
+			};
+			PIO10: gpio@fee05000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x5000 0x100>;
+				st,bank-name	= "PIO10";
+			};
+			PIO11: gpio@fee06000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x6000 0x100>;
+				st,bank-name	= "PIO11";
+			};
+			PIO12: gpio@fee07000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x7000 0x100>;
+				st,bank-name	= "PIO12";
+			};
+		};
+
+		pin-controller-rear {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih415-rear-pinctrl";
+			st,syscfg	= <&syscfg_rear>;
+			ranges		= <0 0xfe820000 0x8000>;
+
+			PIO13: gpio@fe820000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO13";
+			};
+			PIO14: gpio@fe821000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO14";
+			};
+			PIO15: gpio@fe822000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO15";
+			};
+			PIO16: gpio@fe823000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO16";
+			};
+			PIO17: gpio@fe824000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO17";
+			};
+			PIO18: gpio@fe825000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x5000 0x100>;
+				st,bank-name	= "PIO18";
+			};
+
+			serial2 {
+				pinctrl_serial2: serial2-0 {
+					st,pins {
+						tx	= <&PIO17 4 ALT2 OUT>;
+						rx	= <&PIO17 5 ALT2 IN>;
+					};
+				};
+			};
+		};
+
+		pin-controller-left {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih415-left-pinctrl";
+			st,syscfg	= <&syscfg_left>;
+			ranges		= <0 0xfd6b0000 0x3000>;
+
+			PIO100: gpio@fd6b0000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO100";
+			};
+			PIO101: gpio@fd6b1000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO101";
+			};
+			PIO102: gpio@fd6b2000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO102";
+			};
+		};
+
+		pin-controller-right {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih415-right-pinctrl";
+			st,syscfg	= <&syscfg_right>;
+			ranges		= <0 0xfd330000 0x5000>;
+
+			PIO103: gpio@fd330000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO103";
+			};
+			PIO104: gpio@fd331000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO104";
+			};
+			PIO105: gpio@fd332000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO105";
+			};
+			PIO106: gpio@fd333000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO106";
+			};
+			PIO107: gpio@fd334000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO107";
+			};
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih415.dtsi b/arch/arm/boot/dts/stih415.dtsi
new file mode 100644
index 000000000000..74ab8ded4b49
--- /dev/null
+++ b/arch/arm/boot/dts/stih415.dtsi
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+#include "stih41x.dtsi"
+#include "stih415-clock.dtsi"
+#include "stih415-pinctrl.dtsi"
+/ {
+
+	L2: cache-controller {
+		compatible = "arm,pl310-cache";
+		reg = <0xfffe2000 0x1000>;
+		arm,data-latency = <3 2 2>;
+		arm,tag-latency = <1 1 1>;
+		cache-unified;
+		cache-level = <2>;
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		interrupt-parent = <&intc>;
+		ranges;
+		compatible	= "simple-bus";
+
+		syscfg_sbc: sbc-syscfg@fe600000{
+			compatible      = "st,stih415-sbc-syscfg", "syscon";
+			reg		= <0xfe600000 0xb4>;
+		};
+
+		syscfg_front: front-syscfg@fee10000{
+			compatible      = "st,stih415-front-syscfg", "syscon";
+			reg		= <0xfee10000 0x194>;
+		};
+
+		syscfg_rear: rear-syscfg@fe830000{
+			compatible      = "st,stih415-rear-syscfg", "syscon";
+			reg		= <0xfe830000 0x190>;
+		};
+
+		/* MPE syscfgs */
+		syscfg_left: left-syscfg@fd690000{
+			compatible      = "st,stih415-left-syscfg", "syscon";
+			reg		= <0xfd690000 0x78>;
+		};
+
+		syscfg_right: right-syscfg@fd320000{
+			compatible      = "st,stih415-right-syscfg", "syscon";
+			reg		= <0xfd320000 0x180>;
+		};
+
+		syscfg_system: system-syscfg@fdde0000  {
+			compatible      = "st,stih415-system-syscfg", "syscon";
+			reg		= <0xfdde0000 0x15c>;
+		};
+
+		syscfg_lpm: lpm-syscfg@fe4b5100{
+			compatible      = "st,stih415-lpm-syscfg", "syscon";
+			reg		= <0xfe4b5100 0x08>;
+		};
+
+		serial2: serial@fed32000 {
+			compatible	= "st,asc";
+			status 		= "disabled";
+			reg		= <0xfed32000 0x2c>;
+			interrupts	= <0 197 0>;
+			pinctrl-names 	= "default";
+			pinctrl-0 	= <&pinctrl_serial2>;
+			clocks		= <&CLKS_ICN_REG_0>;
+		};
+
+		/* SBC comms block ASCs in SASG1 */
+		sbc_serial1: serial@fe531000 {
+			compatible	= "st,asc";
+			status 		= "disabled";
+			reg		= <0xfe531000 0x2c>;
+			interrupts	= <0 210 0>;
+			clocks		= <&CLK_SYSIN>;
+			pinctrl-names 	= "default";
+			pinctrl-0	= <&pinctrl_sbc_serial1>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih416-b2000.dts b/arch/arm/boot/dts/stih416-b2000.dts
new file mode 100644
index 000000000000..a5eb6eee10bf
--- /dev/null
+++ b/arch/arm/boot/dts/stih416-b2000.dts
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/dts-v1/;
+#include "stih416.dtsi"
+#include "stih41x-b2000.dtsi"
+
+/ {
+	compatible = "st,stih416", "st,stih416-b2000";
+	model = "STiH416 B2000";
+};
diff --git a/arch/arm/boot/dts/stih416-b2020.dts b/arch/arm/boot/dts/stih416-b2020.dts
new file mode 100644
index 000000000000..276f28da573a
--- /dev/null
+++ b/arch/arm/boot/dts/stih416-b2020.dts
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/dts-v1/;
+#include "stih416.dtsi"
+#include "stih41x-b2020.dtsi"
+/ {
+	model = "STiH416 B2020";
+	compatible = "st,stih416", "st,stih416-b2020";
+
+};
diff --git a/arch/arm/boot/dts/stih416-clock.dtsi b/arch/arm/boot/dts/stih416-clock.dtsi
new file mode 100644
index 000000000000..7026bf1158d8
--- /dev/null
+++ b/arch/arm/boot/dts/stih416-clock.dtsi
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics R&D Limited
+ * <stlinux-devel@stlinux.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.
+ */
+/ {
+	clocks {
+		/*
+		 * Fixed 30MHz oscillator inputs to SoC
+		 */
+		CLK_SYSIN: CLK_SYSIN {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <30000000>;
+			clock-output-names = "CLK_SYSIN";
+		};
+
+		/*
+		 * ARM Peripheral clock for timers
+		 */
+		arm_periph_clk: arm_periph_clk {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <600000000>;
+		};
+
+		/*
+		 * Bootloader initialized system infrastructure clock for
+		 * serial devices.
+		 */
+		CLK_S_ICN_REG_0: clockgenA0@4 {
+			#clock-cells = <0>;
+			compatible = "fixed-clock";
+			clock-frequency = <100000000>;
+			clock-output-names = "CLK_S_ICN_REG_0";
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih416-pinctrl.dtsi b/arch/arm/boot/dts/stih416-pinctrl.dtsi
new file mode 100644
index 000000000000..957b21a71b4b
--- /dev/null
+++ b/arch/arm/boot/dts/stih416-pinctrl.dtsi
@@ -0,0 +1,295 @@
+
+/*
+ * Copyright (C) 2013 STMicroelectronics Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+#include "st-pincfg.h"
+/ {
+
+	aliases {
+		gpio0	= &PIO0;
+		gpio1	= &PIO1;
+		gpio2	= &PIO2;
+		gpio3	= &PIO3;
+		gpio4	= &PIO4;
+		gpio5	= &PIO40;
+		gpio6	= &PIO5;
+		gpio7	= &PIO6;
+		gpio8	= &PIO7;
+		gpio9	= &PIO8;
+		gpio10	= &PIO9;
+		gpio11	= &PIO10;
+		gpio12	= &PIO11;
+		gpio13	= &PIO12;
+		gpio14	= &PIO30;
+		gpio15	= &PIO31;
+		gpio16	= &PIO13;
+		gpio17	= &PIO14;
+		gpio18	= &PIO15;
+		gpio19	= &PIO16;
+		gpio20	= &PIO17;
+		gpio21	= &PIO18;
+		gpio22	= &PIO100;
+		gpio23	= &PIO101;
+		gpio24	= &PIO102;
+		gpio25	= &PIO103;
+		gpio26	= &PIO104;
+		gpio27	= &PIO105;
+		gpio28	= &PIO106;
+		gpio29	= &PIO107;
+	};
+
+	soc {
+		pin-controller-sbc {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih416-sbc-pinctrl";
+			st,syscfg	= <&syscfg_sbc>;
+			ranges		= <0 0xfe610000 0x6000>;
+
+			PIO0: gpio@fe610000 {
+				gpio-controller;
+				#gpio-cells = <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO0";
+			};
+			PIO1: gpio@fe611000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO1";
+			};
+			PIO2: gpio@fe612000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO2";
+			};
+			PIO3: gpio@fe613000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO3";
+			};
+			PIO4: gpio@fe614000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO4";
+			};
+			PIO40: gpio@fe615000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x5000 0x100>;
+				st,bank-name	= "PIO40";
+				st,retime-pin-mask = <0x7f>;
+			};
+
+			sbc_serial1 {
+				pinctrl_sbc_serial1: sbc_serial1 {
+					st,pins {
+						tx	= <&PIO2 6 ALT3 OUT>;
+						rx	= <&PIO2 7 ALT3 IN>;
+					};
+				};
+			};
+		};
+
+		pin-controller-front {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih416-front-pinctrl";
+			st,syscfg	= <&syscfg_front>;
+			ranges		= <0 0xfee00000 0x10000>;
+
+			PIO5: gpio@fee00000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO5";
+			};
+			PIO6: gpio@fee01000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO6";
+			};
+			PIO7: gpio@fee02000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO7";
+			};
+			PIO8: gpio@fee03000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO8";
+			};
+			PIO9: gpio@fee04000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO9";
+			};
+			PIO10: gpio@fee05000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x5000 0x100>;
+				st,bank-name	= "PIO10";
+			};
+			PIO11: gpio@fee06000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x6000 0x100>;
+				st,bank-name	= "PIO11";
+			};
+			PIO12: gpio@fee07000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x7000 0x100>;
+				st,bank-name	= "PIO12";
+			};
+			PIO30: gpio@fee08000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x8000 0x100>;
+				st,bank-name	= "PIO30";
+			};
+			PIO31: gpio@fee09000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x9000 0x100>;
+				st,bank-name	= "PIO31";
+			};
+		};
+
+		pin-controller-rear {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih416-rear-pinctrl";
+			st,syscfg	= <&syscfg_rear>;
+			ranges 		= <0 0xfe820000 0x6000>;
+
+			PIO13: gpio@fe820000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO13";
+			};
+			PIO14: gpio@fe821000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO14";
+			};
+			PIO15: gpio@fe822000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO15";
+			};
+			PIO16: gpio@fe823000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO16";
+			};
+			PIO17: gpio@fe824000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO17";
+			};
+			PIO18: gpio@fe825000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x5000 0x100>;
+				st,bank-name	= "PIO18";
+				st,retime-pin-mask = <0xf>;
+			};
+
+			serial2 {
+				pinctrl_serial2: serial2-0 {
+					st,pins {
+						tx	= <&PIO17 4 ALT2 OUT>;
+						rx	= <&PIO17 5 ALT2 IN>;
+						output-enable	= <&PIO11 3 ALT2 OUT>;
+					};
+				};
+			};
+		};
+
+		pin-controller-fvdp-fe {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih416-fvdp-fe-pinctrl";
+			st,syscfg	= <&syscfg_fvdp_fe>;
+			ranges		= <0 0xfd6b0000 0x3000>;
+
+			PIO100: gpio@fd6b0000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO100";
+			};
+			PIO101: gpio@fd6b1000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO101";
+			};
+			PIO102: gpio@fd6b2000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO102";
+			};
+		};
+
+		pin-controller-fvdp-lite {
+			#address-cells	= <1>;
+			#size-cells	= <1>;
+			compatible	= "st,stih416-fvdp-lite-pinctrl";
+			st,syscfg		= <&syscfg_fvdp_lite>;
+			ranges			= <0 0xfd330000 0x5000>;
+
+			PIO103: gpio@fd330000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0 0x100>;
+				st,bank-name	= "PIO103";
+			};
+			PIO104: gpio@fd331000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x1000 0x100>;
+				st,bank-name	= "PIO104";
+			};
+			PIO105: gpio@fd332000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x2000 0x100>;
+				st,bank-name	= "PIO105";
+			};
+			PIO106: gpio@fd333000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x3000 0x100>;
+				st,bank-name	= "PIO106";
+			};
+
+			PIO107: gpio@fd334000 {
+				gpio-controller;
+				#gpio-cells	= <1>;
+				reg		= <0x4000 0x100>;
+				st,bank-name	= "PIO107";
+				st,retime-pin-mask = <0xf>;
+			};
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih416.dtsi b/arch/arm/boot/dts/stih416.dtsi
new file mode 100644
index 000000000000..3cecd9689a49
--- /dev/null
+++ b/arch/arm/boot/dts/stih416.dtsi
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2012 STMicroelectronics Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+#include "stih41x.dtsi"
+#include "stih416-clock.dtsi"
+#include "stih416-pinctrl.dtsi"
+/ {
+	L2: cache-controller {
+		compatible = "arm,pl310-cache";
+		reg = <0xfffe2000 0x1000>;
+		arm,data-latency = <3 3 3>;
+		arm,tag-latency = <2 2 2>;
+		cache-unified;
+		cache-level = <2>;
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		interrupt-parent = <&intc>;
+		ranges;
+		compatible	= "simple-bus";
+
+		syscfg_sbc:sbc-syscfg@fe600000{
+			compatible	= "st,stih416-sbc-syscfg", "syscon";
+			reg		= <0xfe600000 0x1000>;
+		};
+
+		syscfg_front:front-syscfg@fee10000{
+			compatible	= "st,stih416-front-syscfg", "syscon";
+			reg		= <0xfee10000 0x1000>;
+		};
+
+		syscfg_rear:rear-syscfg@fe830000{
+			compatible	= "st,stih416-rear-syscfg", "syscon";
+			reg		= <0xfe830000 0x1000>;
+		};
+
+		/* MPE */
+		syscfg_fvdp_fe:fvdp-fe-syscfg@fddf0000{
+			compatible	= "st,stih416-fvdp-fe-syscfg", "syscon";
+			reg		= <0xfddf0000 0x1000>;
+		};
+
+		syscfg_fvdp_lite:fvdp-lite-syscfg@fd6a0000{
+			compatible	= "st,stih416-fvdp-lite-syscfg", "syscon";
+			reg		= <0xfd6a0000 0x1000>;
+		};
+
+		syscfg_cpu:cpu-syscfg@fdde0000{
+			compatible	= "st,stih416-cpu-syscfg", "syscon";
+			reg		= <0xfdde0000 0x1000>;
+		};
+
+		syscfg_compo:compo-syscfg@fd320000{
+			compatible	= "st,stih416-compo-syscfg", "syscon";
+			reg		= <0xfd320000 0x1000>;
+		};
+
+		syscfg_transport:transport-syscfg@fd690000{
+			compatible	= "st,stih416-transport-syscfg", "syscon";
+			reg		= <0xfd690000 0x1000>;
+		};
+
+		syscfg_lpm:lpm-syscfg@fe4b5100{
+			compatible	= "st,stih416-lpm-syscfg", "syscon";
+			reg		= <0xfe4b5100 0x8>;
+		};
+
+		serial2: serial@fed32000{
+			compatible	= "st,asc";
+			status 		= "disabled";
+			reg		= <0xfed32000 0x2c>;
+			interrupts	= <0 197 0>;
+			clocks          = <&CLK_S_ICN_REG_0>;
+			pinctrl-names 	= "default";
+			pinctrl-0 	= <&pinctrl_serial2>;
+		};
+
+		/* SBC_UART1 */
+		sbc_serial1: serial@fe531000 {
+			compatible	= "st,asc";
+			status 		= "disabled";
+			reg		= <0xfe531000 0x2c>;
+			interrupts	= <0 210 0>;
+			pinctrl-names 	= "default";
+			pinctrl-0 	= <&pinctrl_sbc_serial1>;
+			clocks          = <&CLK_SYSIN>;
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih41x-b2000.dtsi b/arch/arm/boot/dts/stih41x-b2000.dtsi
new file mode 100644
index 000000000000..8e694d2b8f5b
--- /dev/null
+++ b/arch/arm/boot/dts/stih41x-b2000.dtsi
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/ {
+
+	memory{
+		device_type = "memory";
+		reg = <0x60000000 0x40000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyAS0,115200";
+		linux,stdout-path = &serial2;
+	};
+
+	aliases {
+		ttyAS0 = &serial2;
+	};
+
+	soc {
+		serial2: serial@fed32000 {
+			status = "okay";
+		};
+
+		leds {
+			compatible	= "gpio-leds";
+			fp_led {
+				#gpio-cells = <1>;
+				label	= "Front Panel LED";
+				gpios	= <&PIO105 7>;
+				linux,default-trigger	= "heartbeat";
+			};
+		};
+
+	};
+};
diff --git a/arch/arm/boot/dts/stih41x-b2020.dtsi b/arch/arm/boot/dts/stih41x-b2020.dtsi
new file mode 100644
index 000000000000..133e18143b1b
--- /dev/null
+++ b/arch/arm/boot/dts/stih41x-b2020.dtsi
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@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
+ * publishhed by the Free Software Foundation.
+ */
+/ {
+	memory{
+		device_type = "memory";
+		reg = <0x40000000 0x80000000>;
+	};
+
+	chosen {
+		bootargs = "console=ttyAS0,115200";
+		linux,stdout-path = &sbc_serial1;
+	};
+
+	aliases {
+		ttyAS0 = &sbc_serial1;
+	};
+	soc {
+		sbc_serial1: serial@fe531000 {
+			status = "okay";
+		};
+
+		leds {
+			compatible	= "gpio-leds";
+			red {
+				#gpio-cells = <1>;
+				label	= "Front Panel LED";
+				gpios	= <&PIO4 1>;
+				linux,default-trigger	= "heartbeat";
+			};
+			green {
+				gpios	= <&PIO4 7>;
+				default-state = "off";
+			};
+		};
+	};
+};
diff --git a/arch/arm/boot/dts/stih41x.dtsi b/arch/arm/boot/dts/stih41x.dtsi
new file mode 100644
index 000000000000..7321403cab8a
--- /dev/null
+++ b/arch/arm/boot/dts/stih41x.dtsi
@@ -0,0 +1,38 @@
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		cpu@0 {
+			compatible = "arm,cortex-a9";
+			reg = <0>;
+		};
+		cpu@1 {
+			compatible = "arm,cortex-a9";
+			reg = <1>;
+		};
+	};
+
+	intc: interrupt-controller@fffe1000 {
+		compatible = "arm,cortex-a9-gic";
+		#interrupt-cells = <3>;
+		interrupt-controller;
+		reg = <0xfffe1000 0x1000>,
+		      <0xfffe0100 0x100>;
+	};
+
+	scu@fffe0000 {
+		compatible = "arm,cortex-a9-scu";
+		reg = <0xfffe0000 0x1000>;
+	};
+
+	timer@fffe0200 {
+		interrupt-parent = <&intc>;
+		compatible = "arm,cortex-a9-global-timer";
+		reg = <0xfffe0200 0x100>;
+		interrupts = <1 11 0x04>;
+		clocks = <&arm_periph_clk>;
+	};
+};
diff --git a/arch/arm/include/debug/sti.S b/arch/arm/include/debug/sti.S
new file mode 100644
index 000000000000..e3aa58ff1776
--- /dev/null
+++ b/arch/arm/include/debug/sti.S
@@ -0,0 +1,61 @@
+/*
+ * arch/arm/include/debug/sti.S
+ *
+ * Debugging macro include header
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ *
+ * 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.
+ */
+
+#define STIH41X_COMMS_BASE              0xfed00000
+#define STIH41X_ASC2_BASE               (STIH41X_COMMS_BASE+0x32000)
+
+#define STIH41X_SBC_LPM_BASE            0xfe400000
+#define STIH41X_SBC_COMMS_BASE          (STIH41X_SBC_LPM_BASE + 0x100000)
+#define STIH41X_SBC_ASC1_BASE           (STIH41X_SBC_COMMS_BASE + 0x31000)
+
+
+#define VIRT_ADDRESS(x)		(x - 0x1000000)
+
+#if IS_ENABLED(CONFIG_STIH41X_DEBUG_ASC2)
+#define DEBUG_LL_UART_BASE	STIH41X_ASC2_BASE
+#endif
+
+#if IS_ENABLED(CONFIG_STIH41X_DEBUG_SBC_ASC1)
+#define DEBUG_LL_UART_BASE	STIH41X_SBC_ASC1_BASE
+#endif
+
+#ifndef DEBUG_LL_UART_BASE
+#error "DEBUG UART is not Configured"
+#endif
+
+#define ASC_TX_BUF_OFF  0x04
+#define ASC_CTRL_OFF    0x0c
+#define ASC_STA_OFF     0x14
+
+#define ASC_STA_TX_FULL         (1<<9)
+#define ASC_STA_TX_EMPTY        (1<<1)
+
+
+		.macro	addruart, rp, rv, tmp
+		ldr	\rp,      =DEBUG_LL_UART_BASE	@ physical base
+		ldr	\rv,      =VIRT_ADDRESS(DEBUG_LL_UART_BASE) @ virt base
+		.endm
+
+                .macro  senduart,rd,rx
+                strb    \rd, [\rx, #ASC_TX_BUF_OFF]
+                .endm
+
+                .macro  waituart,rd,rx
+1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
+                tst     \rd, #ASC_STA_TX_FULL
+                bne     1001b
+                .endm
+
+                .macro  busyuart,rd,rx
+1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
+                tst     \rd, #ASC_STA_TX_EMPTY
+                beq     1001b
+                .endm
diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
new file mode 100644
index 000000000000..d04e3bfe1918
--- /dev/null
+++ b/arch/arm/mach-sti/Kconfig
@@ -0,0 +1,45 @@
+menuconfig ARCH_STI
+	bool "STMicroelectronics Consumer Electronics SOCs with Device Trees" if ARCH_MULTI_V7
+	select GENERIC_CLOCKEVENTS
+	select CLKDEV_LOOKUP
+	select ARM_GIC
+	select ARM_GLOBAL_TIMER
+	select PINCTRL
+	select PINCTRL_ST
+	select MFD_SYSCON
+	select MIGHT_HAVE_CACHE_L2X0
+	select HAVE_SMP
+	select HAVE_ARM_SCU if SMP
+	select ARCH_REQUIRE_GPIOLIB
+	select ARM_ERRATA_720789
+	select ARM_ERRATA_754322
+	select PL310_ERRATA_753970 if CACHE_PL310
+	select PL310_ERRATA_769419 if CACHE_PL310
+	help
+	  Include support for STiH41x SOCs like STiH415/416 using the device tree
+	  for discovery
+	  More information at Documentation/arm/STiH41x and
+	  at Documentation/devicetree
+
+
+if ARCH_STI
+
+config SOC_STIH415
+	bool "STiH415 STMicroelectronics Consumer Electronics family"
+	default y
+	help
+	  This enables support for STMicroelectronics Digital Consumer
+	  Electronics family StiH415 parts, primarily targetted at set-top-box
+	  and other digital audio/video applications using Flattned Device
+	  Trees.
+
+config SOC_STIH416
+	bool "STiH416 STMicroelectronics Consumer Electronics family"
+	default y
+	help
+	  This enables support for STMicroelectronics Digital Consumer
+	  Electronics family StiH416 parts, primarily targetted at set-top-box
+	  and other digital audio/video applications using Flattened Device
+	  Trees.
+
+endif
diff --git a/arch/arm/mach-sti/Makefile b/arch/arm/mach-sti/Makefile
new file mode 100644
index 000000000000..acb330916333
--- /dev/null
+++ b/arch/arm/mach-sti/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_SMP)		+= platsmp.o headsmp.o
+obj-$(CONFIG_ARCH_STI) 		+= board-dt.o
diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c
new file mode 100644
index 000000000000..8fe6f0c46480
--- /dev/null
+++ b/arch/arm/mach-sti/board-dt.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ * Author(s): Srinivas Kandagatla <srinivas.kandagatla@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.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/irq.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+
+#include "smp.h"
+
+void __init stih41x_l2x0_init(void)
+{
+	u32 way_size = 0x4;
+	u32 aux_ctrl;
+	/* may be this can be encoded in macros like BIT*() */
+	aux_ctrl = (0x1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) |
+		(0x1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
+		(0x1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) |
+		(way_size << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
+
+	l2x0_of_init(aux_ctrl, L2X0_AUX_CTRL_MASK);
+}
+
+static void __init stih41x_timer_init(void)
+{
+	of_clk_init(NULL);
+	clocksource_of_init();
+	stih41x_l2x0_init();
+}
+
+static const char *stih41x_dt_match[] __initdata = {
+	"st,stih415",
+	"st,stih416",
+	NULL
+};
+
+DT_MACHINE_START(STM, "STiH415/416 SoC with Flattened Device Tree")
+	.init_time	= stih41x_timer_init,
+	.smp		= smp_ops(sti_smp_ops),
+	.dt_compat	= stih41x_dt_match,
+MACHINE_END
diff --git a/arch/arm/mach-sti/headsmp.S b/arch/arm/mach-sti/headsmp.S
new file mode 100644
index 000000000000..78ebc7559f53
--- /dev/null
+++ b/arch/arm/mach-sti/headsmp.S
@@ -0,0 +1,44 @@
+/*
+ *  arch/arm/mach-sti/headsmp.S
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ *		http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/headsmp.S
+ *
+ *  Copyright (c) 2003 ARM Limited
+ *  All Rights Reserved
+ *
+ * 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.
+ */
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+	__INIT
+
+/*
+ * ST specific entry point for secondary CPUs.  This provides
+ * a "holding pen" into which all secondary cores are held until we're
+ * ready for them to initialise.
+ */
+ENTRY(sti_secondary_startup)
+	mrc	p15, 0, r0, c0, c0, 5
+	and	r0, r0, #15
+	adr	r4, 1f
+	ldmia	r4, {r5, r6}
+	sub	r4, r4, r5
+	add	r6, r6, r4
+pen:	ldr	r7, [r6]
+	cmp	r7, r0
+	bne	pen
+
+	/*
+	 * we've been released from the holding pen: secondary_stack
+	 * should now contain the SVC stack for this core
+	 */
+	b	secondary_startup
+
+1:	.long	.
+	.long	pen_release
diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c
new file mode 100644
index 000000000000..977a863468fc
--- /dev/null
+++ b/arch/arm/mach-sti/platsmp.c
@@ -0,0 +1,117 @@
+/*
+ *  arch/arm/mach-sti/platsmp.c
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ *		http://www.st.com
+ *
+ * Cloned from linux/arch/arm/mach-vexpress/platsmp.c
+ *
+ *  Copyright (C) 2002 ARM Ltd.
+ *  All Rights Reserved
+ *
+ * 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.
+ */
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+
+#include "smp.h"
+
+static void __cpuinit write_pen_release(int val)
+{
+	pen_release = val;
+	smp_wmb();
+	__cpuc_flush_dcache_area((void *)&pen_release, sizeof(pen_release));
+	outer_clean_range(__pa(&pen_release), __pa(&pen_release + 1));
+}
+
+static DEFINE_SPINLOCK(boot_lock);
+
+void __cpuinit sti_secondary_init(unsigned int cpu)
+{
+	trace_hardirqs_off();
+
+	/*
+	 * let the primary processor know we're out of the
+	 * pen, then head off into the C entry point
+	 */
+	write_pen_release(-1);
+
+	/*
+	 * Synchronise with the boot thread.
+	 */
+	spin_lock(&boot_lock);
+	spin_unlock(&boot_lock);
+}
+
+int __cpuinit sti_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	unsigned long timeout;
+
+	/*
+	 * set synchronisation state between this boot processor
+	 * and the secondary one
+	 */
+	spin_lock(&boot_lock);
+
+	/*
+	 * The secondary processor is waiting to be released from
+	 * the holding pen - release it, then wait for it to flag
+	 * that it has been released by resetting pen_release.
+	 *
+	 * Note that "pen_release" is the hardware CPU ID, whereas
+	 * "cpu" is Linux's internal ID.
+	 */
+	write_pen_release(cpu_logical_map(cpu));
+
+	/*
+	 * Send the secondary CPU a soft interrupt, thereby causing
+	 * it to jump to the secondary entrypoint.
+	 */
+	arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+
+	timeout = jiffies + (1 * HZ);
+	while (time_before(jiffies, timeout)) {
+		smp_rmb();
+		if (pen_release == -1)
+			break;
+
+		udelay(10);
+	}
+
+	/*
+	 * now the secondary core is starting up let it run its
+	 * calibrations, then wait for it to finish
+	 */
+	spin_unlock(&boot_lock);
+
+	return pen_release != -1 ? -ENOSYS : 0;
+}
+
+void __init sti_smp_prepare_cpus(unsigned int max_cpus)
+{
+	void __iomem *scu_base = NULL;
+	struct device_node *np = of_find_compatible_node(
+					NULL, NULL, "arm,cortex-a9-scu");
+	if (np) {
+		scu_base = of_iomap(np, 0);
+		scu_enable(scu_base);
+		of_node_put(np);
+	}
+}
+
+struct smp_operations __initdata sti_smp_ops = {
+	.smp_prepare_cpus	= sti_smp_prepare_cpus,
+	.smp_secondary_init	= sti_secondary_init,
+	.smp_boot_secondary	= sti_boot_secondary,
+};
diff --git a/arch/arm/mach-sti/smp.h b/arch/arm/mach-sti/smp.h
new file mode 100644
index 000000000000..1871b72b1a7e
--- /dev/null
+++ b/arch/arm/mach-sti/smp.h
@@ -0,0 +1,17 @@
+/*
+ *  arch/arm/mach-sti/smp.h
+ *
+ * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
+ *		http://www.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.
+ */
+
+#ifndef __MACH_STI_SMP_H
+#define __MACH_STI_SMP_H
+
+extern struct smp_operations	sti_smp_ops;
+
+#endif