armv7: Add ST-Ericsson u8500 arch

Based on ST-Ericsson internal git repo.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
CC: Albert Aribaud <albert.aribaud@free.fr>

9 files changed, 767 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/u8500/Makefile b/arch/arm/cpu/armv7/u8500/Makefile
new file mode 100644
index 0000000..270aa40
--- /dev/null
+++ b/arch/arm/cpu/armv7/u8500/Makefile
@@ -0,0 +1,46 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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.
+#
+# 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., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(SOC).o
+
+COBJS	= timer.o clock.o
+SOBJS	= lowlevel.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/armv7/u8500/clock.c b/arch/arm/cpu/armv7/u8500/clock.c
new file mode 100644
index 0000000..9e3b873
--- /dev/null
+++ b/arch/arm/cpu/armv7/u8500/clock.c
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2009 ST-Ericsson
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct clkrst {
+	unsigned int pcken;
+	unsigned int pckdis;
+	unsigned int kcken;
+	unsigned int kckdis;
+};
+
+static unsigned int clkrst_base[] = {
+	U8500_CLKRST1_BASE,
+	U8500_CLKRST2_BASE,
+	U8500_CLKRST3_BASE,
+	0,
+	U8500_CLKRST5_BASE,
+	U8500_CLKRST6_BASE,
+	U8500_CLKRST7_BASE,	/* ED only */
+};
+
+/* Turn on peripheral clock at PRCC level */
+void u8500_clock_enable(int periph, int cluster, int kern)
+{
+	struct clkrst *clkrst = (struct clkrst *) clkrst_base[periph - 1];
+
+	if (kern != -1)
+		writel(1 << kern, &clkrst->kcken);
+
+	if (cluster != -1)
+		writel(1 << cluster, &clkrst->pcken);
+}
diff --git a/arch/arm/cpu/armv7/u8500/lowlevel.S b/arch/arm/cpu/armv7/u8500/lowlevel.S
new file mode 100644
index 0000000..743071c
--- /dev/null
+++ b/arch/arm/cpu/armv7/u8500/lowlevel.S
@@ -0,0 +1,35 @@
+/*
+ * (C) Copyright 2011 ST-Ericsson
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+
+.globl lowlevel_init
+lowlevel_init:
+	mov	pc, lr
+
+	.align	5
+.globl reset_cpu
+reset_cpu:
+        ldr r0, =CFG_PRCMU_BASE
+        ldr r1, =0x1
+        str r1, [r0, #0x228]
+_loop_forever:
+	b	_loop_forever
diff --git a/arch/arm/cpu/armv7/u8500/timer.c b/arch/arm/cpu/armv7/u8500/timer.c
new file mode 100644
index 0000000..8e96eaa
--- /dev/null
+++ b/arch/arm/cpu/armv7/u8500/timer.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2010 Linaro Limited
+ * John Rigby <john.rigby@linaro.org>
+ *
+ * Based on original from Linux kernel source and
+ * internal ST-Ericsson U-Boot source.
+ * (C) Copyright 2009 Alessandro Rubini
+ * (C) Copyright 2010 ST-Ericsson
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * The MTU device has some interrupt control registers
+ * followed by 4 timers.
+ */
+
+/* The timers */
+struct u8500_mtu_timer {
+	u32 lr;			/* Load value */
+	u32 cv;			/* Current value */
+	u32 cr;			/* Control reg */
+	u32 bglr;		/* ??? */
+};
+
+/* The MTU that contains the timers */
+struct u8500_mtu {
+	u32 imsc;		/* Interrupt mask set/clear */
+	u32 ris;		/* Raw interrupt status */
+	u32 mis;		/* Masked interrupt status */
+	u32 icr;		/* Interrupt clear register */
+	struct u8500_mtu_timer pt[4];
+};
+
+/* bits for the control register */
+#define MTU_CR_ONESHOT		0x01	/* if 0 = wraps reloading from BGLR */
+#define MTU_CR_32BITS		0x02
+
+#define MTU_CR_PRESCALE_1	0x00
+#define MTU_CR_PRESCALE_16	0x04
+#define MTU_CR_PRESCALE_256	0x08
+#define MTU_CR_PRESCALE_MASK	0x0c
+
+#define MTU_CR_PERIODIC		0x40	/* if 0 = free-running */
+#define MTU_CR_ENA		0x80
+
+/*
+ * The MTU is clocked at 133 MHz by default. (V1 and later)
+ */
+#define TIMER_CLOCK		(133 * 1000 * 1000 / 16)
+#define COUNT_TO_USEC(x)	((x) * 16 / 133)
+#define USEC_TO_COUNT(x)	((x) * 133 / 16)
+#define TICKS_PER_HZ		(TIMER_CLOCK / CONFIG_SYS_HZ)
+#define TICKS_TO_HZ(x)		((x) / TICKS_PER_HZ)
+#define TIMER_LOAD_VAL		0xffffffff
+
+/*
+ * MTU timer to use (from 0 to 3).
+ */
+#define MTU_TIMER 2
+
+static struct u8500_mtu_timer *timer_base =
+	&((struct u8500_mtu *)U8500_MTU0_BASE_V1)->pt[MTU_TIMER];
+
+/* macro to read the 32 bit timer: since it decrements, we invert read value */
+#define READ_TIMER() (~readl(&timer_base->cv))
+
+/* Configure a free-running, auto-wrap counter with /16 prescaler */
+int timer_init(void)
+{
+	writel(MTU_CR_ENA | MTU_CR_PRESCALE_16 | MTU_CR_32BITS,
+	       &timer_base->cr);
+	return 0;
+}
+
+ulong get_timer_masked(void)
+{
+	/* current tick value */
+	ulong now = TICKS_TO_HZ(READ_TIMER());
+
+	if (now >= gd->lastinc)	/* normal (non rollover) */
+		gd->tbl += (now - gd->lastinc);
+	else			/* rollover */
+		gd->tbl += (TICKS_TO_HZ(TIMER_LOAD_VAL) - gd->lastinc) + now;
+	gd->lastinc = now;
+	return gd->tbl;
+}
+
+/* Delay x useconds */
+void __udelay(ulong usec)
+{
+	long tmo = usec * (TIMER_CLOCK / 1000) / 1000;
+	ulong now, last = READ_TIMER();
+
+	while (tmo > 0) {
+		now = READ_TIMER();
+		if (now > last)	/* normal (non rollover) */
+			tmo -= now - last;
+		else		/* rollover */
+			tmo -= TIMER_LOAD_VAL - last + now;
+		last = now;
+	}
+}
+
+ulong get_timer(ulong base)
+{
+	return get_timer_masked() - base;
+}
+
+void set_timer(ulong t)
+{
+	gd->tbl = t;
+}
+
+/*
+ * Emulation of Power architecture long long timebase.
+ *
+ * TODO: Support gd->tbu for real long long timebase.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * Emulation of Power architecture timebase.
+ * NB: Low resolution compared to Power tbclk.
+ */
+ulong get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}
diff --git a/arch/arm/include/asm/arch-u8500/clock.h b/arch/arm/include/asm/arch-u8500/clock.h
new file mode 100644
index 0000000..b00ab0d
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/clock.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2009
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __ASM_ARCH_CLOCK
+#define __ASM_ARCH_CLOCK
+
+struct prcmu {
+	unsigned int armclkfix_mgt;
+	unsigned int armclk_mgt;
+	unsigned int svammdspclk_mgt;
+	unsigned int siammdspclk_mgt;
+	unsigned int reserved;
+	unsigned int sgaclk_mgt;
+	unsigned int uartclk_mgt;
+	unsigned int msp02clk_mgt;
+	unsigned int i2cclk_mgt;
+	unsigned int sdmmcclk_mgt;
+	unsigned int slimclk_mgt;
+	unsigned int per1clk_mgt;
+	unsigned int per2clk_mgt;
+	unsigned int per3clk_mgt;
+	unsigned int per5clk_mgt;
+	unsigned int per6clk_mgt;
+	unsigned int per7clk_mgt;
+	unsigned int lcdclk_mgt;
+	unsigned int reserved1;
+	unsigned int bmlclk_mgt;
+	unsigned int hsitxclk_mgt;
+	unsigned int hsirxclk_mgt;
+	unsigned int hdmiclk_mgt;
+	unsigned int apeatclk_mgt;
+	unsigned int apetraceclk_mgt;
+	unsigned int mcdeclk_mgt;
+	unsigned int ipi2cclk_mgt;
+	unsigned int dsialtclk_mgt;
+	unsigned int spare2clk_mgt;
+	unsigned int dmaclk_mgt;
+	unsigned int b2r2clk_mgt;
+	unsigned int tvclk_mgt;
+	unsigned int unused[82];
+	unsigned int tcr;
+	unsigned int unused1[23];
+	unsigned int ape_softrst;
+};
+
+extern void u8500_clock_enable(int periph, int kern, int cluster);
+
+static inline void u8500_prcmu_enable(unsigned int *reg)
+{
+	writel(readl(reg) | (1 << 8), reg);
+}
+
+#endif /* __ASM_ARCH_CLOCK */
diff --git a/arch/arm/include/asm/arch-u8500/gpio.h b/arch/arm/include/asm/arch-u8500/gpio.h
new file mode 100644
index 0000000..769def1
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/gpio.h
@@ -0,0 +1,247 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2009
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef _UX500_GPIO_h
+#define _UX500_GPIO_h
+
+#include <asm/types.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/u8500.h>
+
+#define GPIO_TOTAL_PINS                 268
+
+#define GPIO_PINS_PER_BLOCK	32
+#define GPIO_BLOCKS_COUNT       (GPIO_TOTAL_PINS/GPIO_PINS_PER_BLOCK + 1)
+#define GPIO_BLOCK(pin)		(((pin + GPIO_PINS_PER_BLOCK) >> 5) - 1)
+
+
+struct gpio_register {
+	u32 gpio_dat;	/* data register *//*0x000 */
+	u32 gpio_dats;	/* data Set register *//*0x004 */
+	u32 gpio_datc;	/* data Clear register *//*0x008 */
+	u32 gpio_pdis;	/* Pull disable register *//*0x00C */
+	u32 gpio_dir;	/* data direction register *//*0x010 */
+	u32 gpio_dirs;	/* data dir Set register *//*0x014 */
+	u32 gpio_dirc;	/* data dir Clear register *//*0x018 */
+	u32 gpio_slpm;	/* Sleep mode register *//*0x01C */
+	u32 gpio_afsa;	/* AltFun A Select reg *//*0x020 */
+	u32 gpio_afsb;	/* AltFun B Select reg *//*0x024 */
+	u32 gpio_lowemi;/* low EMI Select reg *//*0x028 */
+	u32 reserved_1[(0x040 - 0x02C) >> 2];	/*0x028-0x3C Reserved*/
+	u32 gpio_rimsc;	/* rising edge intr set/clear *//*0x040 */
+	u32 gpio_fimsc;	/* falling edge intr set/clear register *//*0x044 */
+	u32 gpio_mis;	/* masked interrupt status register *//*0x048 */
+	u32 gpio_ic;	/* Interrupt Clear register *//*0x04C */
+	u32 gpio_rwimsc;/* Rising-edge Wakeup IMSC register *//*0x050 */
+	u32 gpio_fwimsc;/* Falling-edge Wakeup IMSC register *//*0x054 */
+	u32 gpio_wks;	/* Wakeup Status register *//*0x058 */
+};
+
+/* Error values returned by functions */
+enum gpio_error {
+	GPIO_OK = 0,
+	GPIO_UNSUPPORTED_HW = -2,
+	GPIO_UNSUPPORTED_FEATURE = -3,
+	GPIO_INVALID_PARAMETER = -4,
+	GPIO_REQUEST_NOT_APPLICABLE = -5,
+	GPIO_REQUEST_PENDING = -6,
+	GPIO_NOT_CONFIGURED = -7,
+	GPIO_INTERNAL_ERROR = -8,
+	GPIO_INTERNAL_EVENT = 1,
+	GPIO_REMAINING_EVENT = 2,
+	GPIO_NO_MORE_PENDING_EVENT = 3,
+	GPIO_INVALID_CLIENT = -25,
+	GPIO_INVALID_PIN = -26,
+	GPIO_PIN_BUSY = -27,
+	GPIO_PIN_NOT_ALLOCATED = -28,
+	GPIO_WRONG_CLIENT = -29,
+	GPIO_UNSUPPORTED_ALTFUNC = -30,
+};
+
+/*GPIO DEVICE ID */
+enum gpio_device_id {
+	GPIO_DEVICE_ID_0,
+	GPIO_DEVICE_ID_1,
+	GPIO_DEVICE_ID_2,
+	GPIO_DEVICE_ID_3,
+	GPIO_DEVICE_ID_INVALID
+};
+
+/*
+ * Alternate Function:
+ *  refered in altfun_table to pointout particular altfun to be enabled
+ *  when using GPIO_ALT_FUNCTION A/B/C enable/disable operation
+ */
+enum gpio_alt_function {
+	GPIO_ALT_UART_0_MODEM,
+	GPIO_ALT_UART_0_NO_MODEM,
+	GPIO_ALT_UART_1,
+	GPIO_ALT_UART_2,
+	GPIO_ALT_I2C_0,
+	GPIO_ALT_I2C_1,
+	GPIO_ALT_I2C_2,
+	GPIO_ALT_I2C_3,
+	GPIO_ALT_MSP_0,
+	GPIO_ALT_MSP_1,
+	GPIO_ALT_MSP_2,
+	GPIO_ALT_MSP_3,
+	GPIO_ALT_MSP_4,
+	GPIO_ALT_MSP_5,
+	GPIO_ALT_SSP_0,
+	GPIO_ALT_SSP_1,
+	GPIO_ALT_MM_CARD0,
+	GPIO_ALT_SD_CARD0,
+	GPIO_ALT_DMA_0,
+	GPIO_ALT_DMA_1,
+	GPIO_ALT_HSI0,
+	GPIO_ALT_CCIR656_INPUT,
+	GPIO_ALT_CCIR656_OUTPUT,
+	GPIO_ALT_LCD_PANEL,
+	GPIO_ALT_MDIF,
+	GPIO_ALT_SDRAM,
+	GPIO_ALT_HAMAC_AUDIO_DBG,
+	GPIO_ALT_HAMAC_VIDEO_DBG,
+	GPIO_ALT_CLOCK_RESET,
+	GPIO_ALT_TSP,
+	GPIO_ALT_IRDA,
+	GPIO_ALT_USB_MINIMUM,
+	GPIO_ALT_USB_I2C,
+	GPIO_ALT_OWM,
+	GPIO_ALT_PWL,
+	GPIO_ALT_FSMC,
+	GPIO_ALT_COMP_FLASH,
+	GPIO_ALT_SRAM_NOR_FLASH,
+	GPIO_ALT_FSMC_ADDLINE_0_TO_15,
+	GPIO_ALT_SCROLL_KEY,
+	GPIO_ALT_MSHC,
+	GPIO_ALT_HPI,
+	GPIO_ALT_USB_OTG,
+	GPIO_ALT_SDIO,
+	GPIO_ALT_HSMMC,
+	GPIO_ALT_FSMC_ADD_DATA_0_TO_25,
+	GPIO_ALT_HSI1,
+	GPIO_ALT_NOR,
+	GPIO_ALT_NAND,
+	GPIO_ALT_KEYPAD,
+	GPIO_ALT_VPIP,
+	GPIO_ALT_CAM,
+	GPIO_ALT_CCP1,
+	GPIO_ALT_EMMC,
+	GPIO_ALT_POP_EMMC,
+	GPIO_ALT_FUNMAX		/* Add new alt func before this */
+};
+
+/* Defines pin assignment(Software mode or Alternate mode) */
+enum gpio_mode {
+	GPIO_MODE_LEAVE_UNCHANGED,	/* Parameter will be ignored */
+	GPIO_MODE_SOFTWARE,	/* Pin connected to GPIO (SW controlled) */
+	GPIO_ALTF_A,		/* Pin connected to altfunc 1 (HW periph 1) */
+	GPIO_ALTF_B,		/* Pin connected to altfunc 2 (HW periph 2) */
+	GPIO_ALTF_C,		/* Pin connected to altfunc 3 (HW periph 3) */
+	GPIO_ALTF_FIND,		/* Pin connected to altfunc 3 (HW periph 3) */
+	GPIO_ALTF_DISABLE	/* Pin connected to altfunc 3 (HW periph 3) */
+};
+
+/* Defines GPIO pin direction */
+enum gpio_direction {
+	GPIO_DIR_LEAVE_UNCHANGED,	/* Parameter will be ignored */
+	GPIO_DIR_INPUT,		/* GPIO set as input */
+	GPIO_DIR_OUTPUT		/* GPIO set as output */
+};
+
+/* Interrupt trigger mode */
+enum gpio_trig {
+	GPIO_TRIG_LEAVE_UNCHANGED,	/* Parameter will be ignored */
+	GPIO_TRIG_DISABLE,	/* Trigger no IT */
+	GPIO_TRIG_RISING_EDGE,	/* Trigger an IT on rising edge */
+	GPIO_TRIG_FALLING_EDGE,	/* Trigger an IT on falling edge */
+	GPIO_TRIG_BOTH_EDGES,	/* Trigger an IT on rising and falling edge */
+	GPIO_TRIG_HIGH_LEVEL,	/* Trigger an IT on high level */
+	GPIO_TRIG_LOW_LEVEL	/* Trigger an IT on low level */
+};
+
+/* Configuration parameters for one GPIO pin.*/
+struct gpio_config {
+	enum gpio_mode mode;
+	enum gpio_direction direction;
+	enum gpio_trig trig;
+	char *dev_name;		/* Who owns the gpio pin */
+};
+
+/* GPIO pin data*/
+enum gpio_data {
+	GPIO_DATA_LOW,
+	GPIO_DATA_HIGH
+};
+
+/* GPIO behaviour in sleep mode */
+enum gpio_sleep_mode {
+	GPIO_SLEEP_MODE_LEAVE_UNCHANGED,	/* Parameter will be ignored */
+	GPIO_SLEEP_MODE_INPUT_DEFAULTVOLT,	/* GPIO is an input with pull
+						   up/down enabled when in sleep
+						   mode. */
+	GPIO_SLEEP_MODE_CONTROLLED_BY_GPIO	/* GPIO pin is controlled by
+						   GPIO IP. So mode, direction
+						   and data values for GPIO pin
+						   in sleep mode are determined
+						   by configuration set to GPIO
+						   pin before entering to sleep
+						   mode. */
+};
+
+/* GPIO ability to wake the system up from sleep mode.*/
+enum gpio_wake {
+	GPIO_WAKE_LEAVE_UNCHANGED,	/* Parameter will be ignored */
+	GPIO_WAKE_DISABLE,	/* No wake of system from sleep mode. */
+	GPIO_WAKE_LOW_LEVEL,	/* Wake the system up on a LOW level. */
+	GPIO_WAKE_HIGH_LEVEL,	/* Wake the system up on a HIGH level. */
+	GPIO_WAKE_RISING_EDGE,	/* Wake the system up on a RISING edge. */
+	GPIO_WAKE_FALLING_EDGE,	/* Wake the system up on a FALLING edge. */
+	GPIO_WAKE_BOTH_EDGES	/* Wake the system up on both RISE and FALL. */
+};
+
+/* Configuration parameters for one GPIO pin in sleep mode.*/
+struct gpio_sleep_config {
+	enum gpio_sleep_mode sleep_mode;/* GPIO behaviour in sleep mode. */
+	enum gpio_wake wake;		/* GPIO ability to wake up system. */
+};
+
+extern int gpio_setpinconfig(int pin_id, struct gpio_config *pin_config);
+extern int gpio_resetpinconfig(int pin_id, char *dev_name);
+extern int gpio_writepin(int pin_id, enum gpio_data value, char *dev_name);
+extern int gpio_readpin(int pin_id, enum gpio_data *value);
+extern int gpio_altfuncenable(enum gpio_alt_function altfunc,
+				      char *dev_name);
+extern int gpio_altfuncdisable(enum gpio_alt_function altfunc,
+				       char *dev_name);
+
+struct gpio_altfun_data {
+	u16 altfun;
+	u16 start;
+	u16 end;
+	u16 cont;
+	u8 type;
+};
+#endif
diff --git a/arch/arm/include/asm/arch-u8500/hardware.h b/arch/arm/include/asm/arch-u8500/hardware.h
new file mode 100644
index 0000000..6bb95ec
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/hardware.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2009
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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 Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __ASM_ARCH_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+/* Peripheral clusters */
+
+#define U8500_PER3_BASE		0x80000000
+#define U8500_PER2_BASE		0x80110000
+#define U8500_PER1_BASE		0x80120000
+#define U8500_PER4_BASE		0x80150000
+
+#define U8500_PER6_BASE		0xa03c0000
+#define U8500_PER7_BASE		0xa03d0000
+#define U8500_PER5_BASE		0xa03e0000
+
+/* GPIO */
+
+#define U8500_GPIO0_BASE	(U8500_PER1_BASE + 0xE000)
+#define U8500_GPIO1_BASE	(U8500_PER1_BASE + 0xE000 + 0x80)
+
+#define U8500_GPIO2_BASE	(U8500_PER3_BASE + 0xE000)
+#define U8500_GPIO3_BASE	(U8500_PER3_BASE + 0xE000 + 0x80)
+#define U8500_GPIO4_BASE	(U8500_PER3_BASE + 0xE000 + 0x100)
+#define U8500_GPIO5_BASE	(U8500_PER3_BASE + 0xE000 + 0x180)
+
+#define U8500_GPIO6_BASE	(U8500_PER2_BASE + 0xE000)
+#define U8500_GPIO7_BASE	(U8500_PER2_BASE + 0xE000 + 0x80)
+
+#define U8500_GPIO8_BASE	(U8500_PER5_BASE + 0x1E000)
+
+/* Per7 */
+#define U8500_CLKRST7_BASE	(U8500_PER7_BASE + 0xf000)
+
+/* Per6 */
+#define U8500_MTU0_BASE_V1	(U8500_PER6_BASE + 0x6000)
+#define U8500_MTU1_BASE_V1	(U8500_PER6_BASE + 0x7000)
+#define U8500_CLKRST6_BASE	(U8500_PER6_BASE + 0xf000)
+
+/* Per5 */
+#define U8500_CLKRST5_BASE	(U8500_PER5_BASE + 0x1f000)
+
+/* Per4 */
+#define U8500_PRCMU_BASE	(U8500_PER4_BASE + 0x07000)
+#define U8500_PRCMU_TCDM_BASE   (U8500_PER4_BASE + 0x0f000)
+
+/* Per3 */
+#define U8500_UART2_BASE	(U8500_PER3_BASE + 0x7000)
+#define U8500_CLKRST3_BASE	(U8500_PER3_BASE + 0xf000)
+
+/* Per2 */
+#define U8500_CLKRST2_BASE	(U8500_PER2_BASE + 0xf000)
+
+/* Per1 */
+#define U8500_UART0_BASE	(U8500_PER1_BASE + 0x0000)
+#define U8500_UART1_BASE	(U8500_PER1_BASE + 0x1000)
+#define U8500_CLKRST1_BASE	(U8500_PER1_BASE + 0xf000)
+
+/* Last page of Boot ROM */
+#define U8500_BOOTROM_BASE      0x9001f000
+#define U8500_BOOTROM_ASIC_ID_OFFSET    0x0ff4
+
+#endif /* __ASM_ARCH_HARDWARE_H */
diff --git a/arch/arm/include/asm/arch-u8500/sys_proto.h b/arch/arm/include/asm/arch-u8500/sys_proto.h
new file mode 100644
index 0000000..bac5e79
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/sys_proto.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef _SYS_PROTO_H_
+#define _SYS_PROTO_H_
+
+void gpio_init(void);
+
+#endif  /* _SYS_PROTO_H_ */
diff --git a/arch/arm/include/asm/arch-u8500/u8500.h b/arch/arm/include/asm/arch-u8500/u8500.h
new file mode 100644
index 0000000..0d6dbb7
--- /dev/null
+++ b/arch/arm/include/asm/arch-u8500/u8500.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2009
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __U8500_H
+#define __U8500_H
+
+/*
+ * base register values for U8500
+ */
+#define CFG_PRCMU_BASE		0x80157000	/* Power, reset and clock
+						   Management Unit */
+#define CFG_SDRAMC_BASE		0x903CF000	/* SDRAMC cnf registers */
+#define CFG_FSMC_BASE		0x80000000	/* FSMC Controller */
+
+/*
+ * U8500 GPIO register base for 9 banks
+ */
+#define U8500_GPIO_0_BASE			0x8012E000
+#define U8500_GPIO_1_BASE			0x8012E080
+#define U8500_GPIO_2_BASE			0x8000E000
+#define U8500_GPIO_3_BASE			0x8000E080
+#define U8500_GPIO_4_BASE			0x8000E100
+#define U8500_GPIO_5_BASE			0x8000E180
+#define U8500_GPIO_6_BASE			0x8011E000
+#define U8500_GPIO_7_BASE			0x8011E080
+#define U8500_GPIO_8_BASE			0xA03FE000
+
+#endif	/* __U8500_H */