Merge branch 'for-torvalds' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson

* 'for-torvalds' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  mach-ux500: voltage domain regulators for DB8500
  cpufreq: make DB8500 cpufreq driver compile
  cpufreq: update DB8500 cpufreq driver
  mach-ux500: move CPUfreq driver to cpufreq subsystem
  mfd: add DB5500 PRCMU driver
  mfd: update DB8500 PRCMU driver
  mach-ux500: move the DB8500 PRCMU driver to MFD
  mach-ux500: make PRCMU base address dynamic
  mach-ux500: rename PRCMU driver per SoC
  mach-ux500: update ASIC version detection
  mach-ux500: update SoC and board IRQ handling
  mach-ux500: update the DB5500 register file
  mach-ux500: update the DB8500 register file

12 files changed, 3561 insertions, 4 deletions

diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index c7f1a6f16b6e..e2fc2d21fa61 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -39,3 +39,5 @@ obj-$(CONFIG_X86_CPUFREQ_NFORCE2)	+= cpufreq-nforce2.o
 
 ##################################################################################d
 
+# ARM SoC drivers
+obj-$(CONFIG_UX500_SOC_DB8500)		+= db8500-cpufreq.o
diff --git a/drivers/cpufreq/db8500-cpufreq.c b/drivers/cpufreq/db8500-cpufreq.c
new file mode 100644
index 000000000000..d90456a809f9
--- /dev/null
+++ b/drivers/cpufreq/db8500-cpufreq.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ * Author: Martin Persson <martin.persson@stericsson.com>
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/cpufreq.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/mfd/db8500-prcmu.h>
+#include <mach/id.h>
+
+static struct cpufreq_frequency_table freq_table[] = {
+	[0] = {
+		.index = 0,
+		.frequency = 300000,
+	},
+	[1] = {
+		.index = 1,
+		.frequency = 600000,
+	},
+	[2] = {
+		/* Used for MAX_OPP, if available */
+		.index = 2,
+		.frequency = CPUFREQ_TABLE_END,
+	},
+	[3] = {
+		.index = 3,
+		.frequency = CPUFREQ_TABLE_END,
+	},
+};
+
+static enum arm_opp idx2opp[] = {
+	ARM_50_OPP,
+	ARM_100_OPP,
+	ARM_MAX_OPP
+};
+
+static struct freq_attr *db8500_cpufreq_attr[] = {
+	&cpufreq_freq_attr_scaling_available_freqs,
+	NULL,
+};
+
+static int db8500_cpufreq_verify_speed(struct cpufreq_policy *policy)
+{
+	return cpufreq_frequency_table_verify(policy, freq_table);
+}
+
+static int db8500_cpufreq_target(struct cpufreq_policy *policy,
+				unsigned int target_freq,
+				unsigned int relation)
+{
+	struct cpufreq_freqs freqs;
+	unsigned int idx;
+
+	/* scale the target frequency to one of the extremes supported */
+	if (target_freq < policy->cpuinfo.min_freq)
+		target_freq = policy->cpuinfo.min_freq;
+	if (target_freq > policy->cpuinfo.max_freq)
+		target_freq = policy->cpuinfo.max_freq;
+
+	/* Lookup the next frequency */
+	if (cpufreq_frequency_table_target
+	    (policy, freq_table, target_freq, relation, &idx)) {
+		return -EINVAL;
+	}
+
+	freqs.old = policy->cur;
+	freqs.new = freq_table[idx].frequency;
+	freqs.cpu = policy->cpu;
+
+	if (freqs.old == freqs.new)
+		return 0;
+
+	/* pre-change notification */
+	cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+
+	/* request the PRCM unit for opp change */
+	if (prcmu_set_arm_opp(idx2opp[idx])) {
+		pr_err("db8500-cpufreq:  Failed to set OPP level\n");
+		return -EINVAL;
+	}
+
+	/* post change notification */
+	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+
+	return 0;
+}
+
+static unsigned int db8500_cpufreq_getspeed(unsigned int cpu)
+{
+	int i;
+	/* request the prcm to get the current ARM opp */
+	for (i = 0; prcmu_get_arm_opp() != idx2opp[i]; i++)
+		;
+	return freq_table[i].frequency;
+}
+
+static int __cpuinit db8500_cpufreq_init(struct cpufreq_policy *policy)
+{
+	int res;
+	int i;
+
+	BUILD_BUG_ON(ARRAY_SIZE(idx2opp) + 1 != ARRAY_SIZE(freq_table));
+
+	if (cpu_is_u8500v2() && !prcmu_is_u8400()) {
+		freq_table[0].frequency = 400000;
+		freq_table[1].frequency = 800000;
+		if (prcmu_has_arm_maxopp())
+			freq_table[2].frequency = 1000000;
+	}
+
+	/* get policy fields based on the table */
+	res = cpufreq_frequency_table_cpuinfo(policy, freq_table);
+	if (!res)
+		cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
+	else {
+		pr_err("db8500-cpufreq : Failed to read policy table\n");
+		return res;
+	}
+
+	policy->min = policy->cpuinfo.min_freq;
+	policy->max = policy->cpuinfo.max_freq;
+	policy->cur = db8500_cpufreq_getspeed(policy->cpu);
+
+	for (i = 0; freq_table[i].frequency != policy->cur; i++)
+		;
+
+	policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
+
+	/*
+	 * FIXME : Need to take time measurement across the target()
+	 *	   function with no/some/all drivers in the notification
+	 *	   list.
+	 */
+	policy->cpuinfo.transition_latency = 20 * 1000; /* in ns */
+
+	/* policy sharing between dual CPUs */
+	cpumask_copy(policy->cpus, &cpu_present_map);
+
+	policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
+
+	return 0;
+}
+
+static struct cpufreq_driver db8500_cpufreq_driver = {
+	.flags  = CPUFREQ_STICKY,
+	.verify = db8500_cpufreq_verify_speed,
+	.target = db8500_cpufreq_target,
+	.get    = db8500_cpufreq_getspeed,
+	.init   = db8500_cpufreq_init,
+	.name   = "DB8500",
+	.attr   = db8500_cpufreq_attr,
+};
+
+static int __init db8500_cpufreq_register(void)
+{
+	if (!cpu_is_u8500v20_or_later())
+		return -ENODEV;
+
+	pr_info("cpufreq for DB8500 started\n");
+	return cpufreq_register_driver(&db8500_cpufreq_driver);
+}
+device_initcall(db8500_cpufreq_register);
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3ed3ff06be5d..481770ab2716 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -538,7 +538,7 @@ config AB8500_CORE
 
 config AB8500_I2C_CORE
 	bool "AB8500 register access via PRCMU I2C"
-	depends on AB8500_CORE && UX500_SOC_DB8500
+	depends on AB8500_CORE && MFD_DB8500_PRCMU
 	default y
 	help
 	  This enables register access to the AB8500 chip via PRCMU I2C.
@@ -575,6 +575,26 @@ config AB3550_CORE
 	  LEDs, vibrator, system power and temperature, power management
 	  and ALSA sound.
 
+config MFD_DB8500_PRCMU
+	bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
+	depends on UX500_SOC_DB8500
+	select MFD_CORE
+	help
+	  Select this option to enable support for the DB8500 Power Reset
+	  and Control Management Unit. This is basically an autonomous
+	  system controller running an XP70 microprocessor, which is accessed
+	  through a register map.
+
+config MFD_DB5500_PRCMU
+	bool "ST-Ericsson DB5500 Power Reset Control Management Unit"
+	depends on UX500_SOC_DB5500
+	select MFD_CORE
+	help
+	  Select this option to enable support for the DB5500 Power Reset
+	  and Control Management Unit. This is basically an autonomous
+	  system controller running an XP70 microprocessor, which is accessed
+	  through a register map.
+
 config MFD_CS5535
 	tristate "Support for CS5535 and CS5536 southbridge core functions"
 	select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 419caa9d7dcf..24aa44448daf 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -74,9 +74,12 @@ obj-$(CONFIG_AB3100_CORE)	+= ab3100-core.o
 obj-$(CONFIG_AB3100_OTP)	+= ab3100-otp.o
 obj-$(CONFIG_AB3550_CORE)	+= ab3550-core.o
 obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-sysctrl.o
-obj-$(CONFIG_AB8500_I2C_CORE)	+= ab8500-i2c.o
 obj-$(CONFIG_AB8500_DEBUG)	+= ab8500-debugfs.o
 obj-$(CONFIG_AB8500_GPADC)	+= ab8500-gpadc.o
+obj-$(CONFIG_MFD_DB8500_PRCMU)	+= db8500-prcmu.o
+# ab8500-i2c need to come after db8500-prcmu (which provides the channel)
+obj-$(CONFIG_AB8500_I2C_CORE)	+= ab8500-i2c.o
+obj-$(CONFIG_MFD_DB5500_PRCMU)	+= db5500-prcmu.o
 obj-$(CONFIG_MFD_TIMBERDALE)    += timberdale.o
 obj-$(CONFIG_PMIC_ADP5520)	+= adp5520.o
 obj-$(CONFIG_LPC_SCH)		+= lpc_sch.o
diff --git a/drivers/mfd/ab8500-i2c.c b/drivers/mfd/ab8500-i2c.c
index 821e6b86afd2..9be541c6b004 100644
--- a/drivers/mfd/ab8500-i2c.c
+++ b/drivers/mfd/ab8500-i2c.c
@@ -11,8 +11,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/ab8500.h>
-
-#include <mach/prcmu.h>
+#include <linux/mfd/db8500-prcmu.h>
 
 static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data)
 {
diff --git a/drivers/mfd/db5500-prcmu-regs.h b/drivers/mfd/db5500-prcmu-regs.h
new file mode 100644
index 000000000000..9a8e9e4ddd33
--- /dev/null
+++ b/drivers/mfd/db5500-prcmu-regs.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ *
+ * License Terms: GNU General Public License v2
+ *
+ * PRCM Unit registers
+ */
+
+#ifndef __MACH_PRCMU_REGS_H
+#define __MACH_PRCMU_REGS_H
+
+#include <mach/hardware.h>
+
+#define PRCM_ARM_PLLDIVPS	(_PRCMU_BASE + 0x118)
+#define PRCM_ARM_PLLDIVPS_ARM_BRM_RATE		0x3f
+#define PRCM_ARM_PLLDIVPS_MAX_MASK		0xf
+
+#define PRCM_PLLARM_LOCKP       (_PRCMU_BASE + 0x0a8)
+#define PRCM_PLLARM_LOCKP_PRCM_PLLARM_LOCKP3	0x2
+
+#define PRCM_ARM_CHGCLKREQ	(_PRCMU_BASE + 0x114)
+#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ	0x1
+
+#define PRCM_PLLARM_ENABLE	(_PRCMU_BASE + 0x98)
+#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_ENABLE	0x1
+#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_COUNTON	0x100
+
+#define PRCM_ARMCLKFIX_MGT	(_PRCMU_BASE + 0x0)
+#define PRCM_A9_RESETN_CLR	(_PRCMU_BASE + 0x1f4)
+#define PRCM_A9_RESETN_SET	(_PRCMU_BASE + 0x1f0)
+#define PRCM_ARM_LS_CLAMP	(_PRCMU_BASE + 0x30c)
+#define PRCM_SRAM_A9		(_PRCMU_BASE + 0x308)
+
+/* ARM WFI Standby signal register */
+#define PRCM_ARM_WFI_STANDBY    (_PRCMU_BASE + 0x130)
+#define PRCM_IOCR		(_PRCMU_BASE + 0x310)
+#define PRCM_IOCR_IOFORCE			0x1
+
+/* CPU mailbox registers */
+#define PRCM_MBOX_CPU_VAL	(_PRCMU_BASE + 0x0fc)
+#define PRCM_MBOX_CPU_SET	(_PRCMU_BASE + 0x100)
+#define PRCM_MBOX_CPU_CLR	(_PRCMU_BASE + 0x104)
+
+/* Dual A9 core interrupt management unit registers */
+#define PRCM_A9_MASK_REQ	(_PRCMU_BASE + 0x328)
+#define PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ	0x1
+
+#define PRCM_A9_MASK_ACK	(_PRCMU_BASE + 0x32c)
+#define PRCM_ARMITMSK31TO0	(_PRCMU_BASE + 0x11c)
+#define PRCM_ARMITMSK63TO32	(_PRCMU_BASE + 0x120)
+#define PRCM_ARMITMSK95TO64	(_PRCMU_BASE + 0x124)
+#define PRCM_ARMITMSK127TO96	(_PRCMU_BASE + 0x128)
+#define PRCM_POWER_STATE_VAL	(_PRCMU_BASE + 0x25C)
+#define PRCM_ARMITVAL31TO0	(_PRCMU_BASE + 0x260)
+#define PRCM_ARMITVAL63TO32	(_PRCMU_BASE + 0x264)
+#define PRCM_ARMITVAL95TO64	(_PRCMU_BASE + 0x268)
+#define PRCM_ARMITVAL127TO96	(_PRCMU_BASE + 0x26C)
+
+#define PRCM_HOSTACCESS_REQ	(_PRCMU_BASE + 0x334)
+#define ARM_WAKEUP_MODEM	0x1
+
+#define PRCM_ARM_IT1_CLEAR	(_PRCMU_BASE + 0x48C)
+#define PRCM_ARM_IT1_VAL	(_PRCMU_BASE + 0x494)
+#define PRCM_HOLD_EVT		(_PRCMU_BASE + 0x174)
+
+#define PRCM_ITSTATUS0		(_PRCMU_BASE + 0x148)
+#define PRCM_ITSTATUS1		(_PRCMU_BASE + 0x150)
+#define PRCM_ITSTATUS2		(_PRCMU_BASE + 0x158)
+#define PRCM_ITSTATUS3		(_PRCMU_BASE + 0x160)
+#define PRCM_ITSTATUS4		(_PRCMU_BASE + 0x168)
+#define PRCM_ITSTATUS5		(_PRCMU_BASE + 0x484)
+#define PRCM_ITCLEAR5		(_PRCMU_BASE + 0x488)
+#define PRCM_ARMIT_MASKXP70_IT	(_PRCMU_BASE + 0x1018)
+
+/* System reset register */
+#define PRCM_APE_SOFTRST	(_PRCMU_BASE + 0x228)
+
+/* Level shifter and clamp control registers */
+#define PRCM_MMIP_LS_CLAMP_SET     (_PRCMU_BASE + 0x420)
+#define PRCM_MMIP_LS_CLAMP_CLR     (_PRCMU_BASE + 0x424)
+
+/* PRCMU clock/PLL/reset registers */
+#define PRCM_PLLDSI_FREQ           (_PRCMU_BASE + 0x500)
+#define PRCM_PLLDSI_ENABLE         (_PRCMU_BASE + 0x504)
+#define PRCM_PLLDSI_LOCKP          (_PRCMU_BASE + 0x508)
+#define PRCM_LCDCLK_MGT            (_PRCMU_BASE + 0x044)
+#define PRCM_MCDECLK_MGT           (_PRCMU_BASE + 0x064)
+#define PRCM_HDMICLK_MGT           (_PRCMU_BASE + 0x058)
+#define PRCM_TVCLK_MGT             (_PRCMU_BASE + 0x07c)
+#define PRCM_DSI_PLLOUT_SEL        (_PRCMU_BASE + 0x530)
+#define PRCM_DSITVCLK_DIV          (_PRCMU_BASE + 0x52C)
+#define PRCM_PLLDSI_LOCKP          (_PRCMU_BASE + 0x508)
+#define PRCM_APE_RESETN_SET        (_PRCMU_BASE + 0x1E4)
+#define PRCM_APE_RESETN_CLR        (_PRCMU_BASE + 0x1E8)
+#define PRCM_CLKOCR		   (_PRCMU_BASE + 0x1CC)
+
+/* ePOD and memory power signal control registers */
+#define PRCM_EPOD_C_SET            (_PRCMU_BASE + 0x410)
+#define PRCM_SRAM_LS_SLEEP         (_PRCMU_BASE + 0x304)
+
+/* Debug power control unit registers */
+#define PRCM_POWER_STATE_SET       (_PRCMU_BASE + 0x254)
+
+/* Miscellaneous unit registers */
+#define PRCM_DSI_SW_RESET          (_PRCMU_BASE + 0x324)
+#define PRCM_GPIOCR                (_PRCMU_BASE + 0x138)
+#define PRCM_GPIOCR_DBG_STM_MOD_CMD1            0x800
+#define PRCM_GPIOCR_DBG_UARTMOD_CMD0            0x1
+
+
+#endif /* __MACH_PRCMU__REGS_H */
diff --git a/drivers/mfd/db5500-prcmu.c b/drivers/mfd/db5500-prcmu.c
new file mode 100644
index 000000000000..9dbb3cab4a6f
--- /dev/null
+++ b/drivers/mfd/db5500-prcmu.c
@@ -0,0 +1,448 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
+ *
+ * U5500 PRCM Unit interface driver
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/completion.h>
+#include <linux/irq.h>
+#include <linux/jiffies.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/db5500-prcmu.h>
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <mach/db5500-regs.h>
+#include "db5500-prcmu-regs.h"
+
+#define _PRCM_MB_HEADER (tcdm_base + 0xFE8)
+#define PRCM_REQ_MB0_HEADER (_PRCM_MB_HEADER + 0x0)
+#define PRCM_REQ_MB1_HEADER (_PRCM_MB_HEADER + 0x1)
+#define PRCM_REQ_MB2_HEADER (_PRCM_MB_HEADER + 0x2)
+#define PRCM_REQ_MB3_HEADER (_PRCM_MB_HEADER + 0x3)
+#define PRCM_REQ_MB4_HEADER (_PRCM_MB_HEADER + 0x4)
+#define PRCM_REQ_MB5_HEADER (_PRCM_MB_HEADER + 0x5)
+#define PRCM_REQ_MB6_HEADER (_PRCM_MB_HEADER + 0x6)
+#define PRCM_REQ_MB7_HEADER (_PRCM_MB_HEADER + 0x7)
+#define PRCM_ACK_MB0_HEADER (_PRCM_MB_HEADER + 0x8)
+#define PRCM_ACK_MB1_HEADER (_PRCM_MB_HEADER + 0x9)
+#define PRCM_ACK_MB2_HEADER (_PRCM_MB_HEADER + 0xa)
+#define PRCM_ACK_MB3_HEADER (_PRCM_MB_HEADER + 0xb)
+#define PRCM_ACK_MB4_HEADER (_PRCM_MB_HEADER + 0xc)
+#define PRCM_ACK_MB5_HEADER (_PRCM_MB_HEADER + 0xd)
+#define PRCM_ACK_MB6_HEADER (_PRCM_MB_HEADER + 0xe)
+#define PRCM_ACK_MB7_HEADER (_PRCM_MB_HEADER + 0xf)
+
+/* Req Mailboxes */
+#define PRCM_REQ_MB0 (tcdm_base + 0xFD8)
+#define PRCM_REQ_MB1 (tcdm_base + 0xFCC)
+#define PRCM_REQ_MB2 (tcdm_base + 0xFC4)
+#define PRCM_REQ_MB3 (tcdm_base + 0xFC0)
+#define PRCM_REQ_MB4 (tcdm_base + 0xF98)
+#define PRCM_REQ_MB5 (tcdm_base + 0xF90)
+#define PRCM_REQ_MB6 (tcdm_base + 0xF8C)
+#define PRCM_REQ_MB7 (tcdm_base + 0xF84)
+
+/* Ack Mailboxes */
+#define PRCM_ACK_MB0 (tcdm_base + 0xF38)
+#define PRCM_ACK_MB1 (tcdm_base + 0xF30)
+#define PRCM_ACK_MB2 (tcdm_base + 0xF24)
+#define PRCM_ACK_MB3 (tcdm_base + 0xF20)
+#define PRCM_ACK_MB4 (tcdm_base + 0xF1C)
+#define PRCM_ACK_MB5 (tcdm_base + 0xF14)
+#define PRCM_ACK_MB6 (tcdm_base + 0xF0C)
+#define PRCM_ACK_MB7 (tcdm_base + 0xF08)
+
+enum mb_return_code {
+	RC_SUCCESS,
+	RC_FAIL,
+};
+
+/* Mailbox 0 headers. */
+enum mb0_header {
+	/* request */
+	RMB0H_PWR_STATE_TRANS = 1,
+	RMB0H_WAKE_UP_CFG,
+	RMB0H_RD_WAKE_UP_ACK,
+	/* acknowledge */
+	AMB0H_WAKE_UP = 1,
+};
+
+/* Mailbox 5 headers. */
+enum mb5_header {
+	MB5H_I2C_WRITE = 1,
+	MB5H_I2C_READ,
+};
+
+/* Request mailbox 5 fields. */
+#define PRCM_REQ_MB5_I2C_SLAVE (PRCM_REQ_MB5 + 0)
+#define PRCM_REQ_MB5_I2C_REG (PRCM_REQ_MB5 + 1)
+#define PRCM_REQ_MB5_I2C_SIZE (PRCM_REQ_MB5 + 2)
+#define PRCM_REQ_MB5_I2C_DATA (PRCM_REQ_MB5 + 4)
+
+/* Acknowledge mailbox 5 fields. */
+#define PRCM_ACK_MB5_RETURN_CODE (PRCM_ACK_MB5 + 0)
+#define PRCM_ACK_MB5_I2C_DATA (PRCM_ACK_MB5 + 4)
+
+#define NUM_MB 8
+#define MBOX_BIT BIT
+#define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
+
+/*
+* Used by MCDE to setup all necessary PRCMU registers
+*/
+#define PRCMU_RESET_DSIPLL			0x00004000
+#define PRCMU_UNCLAMP_DSIPLL			0x00400800
+
+/* HDMI CLK MGT PLLSW=001 (PLLSOC0), PLLDIV=0x8, = 50 Mhz*/
+#define PRCMU_DSI_CLOCK_SETTING			0x00000128
+/* TVCLK_MGT PLLSW=001 (PLLSOC0) PLLDIV=0x13, = 19.05 MHZ */
+#define PRCMU_DSI_LP_CLOCK_SETTING		0x00000135
+#define PRCMU_PLLDSI_FREQ_SETTING		0x0004013C
+#define PRCMU_DSI_PLLOUT_SEL_SETTING		0x00000002
+#define PRCMU_ENABLE_ESCAPE_CLOCK_DIV		0x03000101
+#define PRCMU_DISABLE_ESCAPE_CLOCK_DIV		0x00000101
+
+#define PRCMU_ENABLE_PLLDSI			0x00000001
+#define PRCMU_DISABLE_PLLDSI			0x00000000
+
+#define PRCMU_DSI_RESET_SW			0x00000003
+
+#define PRCMU_PLLDSI_LOCKP_LOCKED		0x3
+
+/*
+ * mb0_transfer - state needed for mailbox 0 communication.
+ * @lock:		The transaction lock.
+ */
+static struct {
+	spinlock_t lock;
+} mb0_transfer;
+
+/*
+ * mb5_transfer - state needed for mailbox 5 communication.
+ * @lock:	The transaction lock.
+ * @work:	The transaction completion structure.
+ * @ack:	Reply ("acknowledge") data.
+ */
+static struct {
+	struct mutex lock;
+	struct completion work;
+	struct {
+		u8 header;
+		u8 status;
+		u8 value[4];
+	} ack;
+} mb5_transfer;
+
+/* PRCMU TCDM base IO address. */
+static __iomem void *tcdm_base;
+
+/**
+ * db5500_prcmu_abb_read() - Read register value(s) from the ABB.
+ * @slave:	The I2C slave address.
+ * @reg:	The (start) register address.
+ * @value:	The read out value(s).
+ * @size:	The number of registers to read.
+ *
+ * Reads register value(s) from the ABB.
+ * @size has to be <= 4.
+ */
+int db5500_prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
+{
+	int r;
+
+	if ((size < 1) || (4 < size))
+		return -EINVAL;
+
+	mutex_lock(&mb5_transfer.lock);
+
+	while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
+		cpu_relax();
+	writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
+	writeb(reg, PRCM_REQ_MB5_I2C_REG);
+	writeb(size, PRCM_REQ_MB5_I2C_SIZE);
+	writeb(MB5H_I2C_READ, PRCM_REQ_MB5_HEADER);
+
+	writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
+	wait_for_completion(&mb5_transfer.work);
+
+	r = 0;
+	if ((mb5_transfer.ack.header == MB5H_I2C_READ) &&
+		(mb5_transfer.ack.status == RC_SUCCESS))
+		memcpy(value, mb5_transfer.ack.value, (size_t)size);
+	else
+		r = -EIO;
+
+	mutex_unlock(&mb5_transfer.lock);
+
+	return r;
+}
+
+/**
+ * db5500_prcmu_abb_write() - Write register value(s) to the ABB.
+ * @slave:	The I2C slave address.
+ * @reg:	The (start) register address.
+ * @value:	The value(s) to write.
+ * @size:	The number of registers to write.
+ *
+ * Writes register value(s) to the ABB.
+ * @size has to be <= 4.
+ */
+int db5500_prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
+{
+	int r;
+
+	if ((size < 1) || (4 < size))
+		return -EINVAL;
+
+	mutex_lock(&mb5_transfer.lock);
+
+	while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
+		cpu_relax();
+	writeb(slave, PRCM_REQ_MB5_I2C_SLAVE);
+	writeb(reg, PRCM_REQ_MB5_I2C_REG);
+	writeb(size, PRCM_REQ_MB5_I2C_SIZE);
+	memcpy_toio(PRCM_REQ_MB5_I2C_DATA, value, size);
+	writeb(MB5H_I2C_WRITE, PRCM_REQ_MB5_HEADER);
+
+	writel(MBOX_BIT(5), PRCM_MBOX_CPU_SET);
+	wait_for_completion(&mb5_transfer.work);
+
+	if ((mb5_transfer.ack.header == MB5H_I2C_WRITE) &&
+		(mb5_transfer.ack.status == RC_SUCCESS))
+		r = 0;
+	else
+		r = -EIO;
+
+	mutex_unlock(&mb5_transfer.lock);
+
+	return r;
+}
+
+int db5500_prcmu_enable_dsipll(void)
+{
+	int i;
+
+	/* Enable DSIPLL_RESETN resets */
+	writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_CLR);
+	/* Unclamp DSIPLL in/out */
+	writel(PRCMU_UNCLAMP_DSIPLL, PRCM_MMIP_LS_CLAMP_CLR);
+	/* Set DSI PLL FREQ */
+	writel(PRCMU_PLLDSI_FREQ_SETTING, PRCM_PLLDSI_FREQ);
+	writel(PRCMU_DSI_PLLOUT_SEL_SETTING,
+		PRCM_DSI_PLLOUT_SEL);
+	/* Enable Escape clocks */
+	writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
+
+	/* Start DSI PLL */
+	writel(PRCMU_ENABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
+	/* Reset DSI PLL */
+	writel(PRCMU_DSI_RESET_SW, PRCM_DSI_SW_RESET);
+	for (i = 0; i < 10; i++) {
+		if ((readl(PRCM_PLLDSI_LOCKP) &
+			PRCMU_PLLDSI_LOCKP_LOCKED) == PRCMU_PLLDSI_LOCKP_LOCKED)
+			break;
+		udelay(100);
+	}
+	/* Release DSIPLL_RESETN */
+	writel(PRCMU_RESET_DSIPLL, PRCM_APE_RESETN_SET);
+	return 0;
+}
+
+int db5500_prcmu_disable_dsipll(void)
+{
+	/* Disable dsi pll */
+	writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
+	/* Disable  escapeclock */
+	writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
+	return 0;
+}
+
+int db5500_prcmu_set_display_clocks(void)
+{
+	/* HDMI and TVCLK Should be handled somewhere else */
+	/* PLLDIV=8, PLLSW=2, CLKEN=1 */
+	writel(PRCMU_DSI_CLOCK_SETTING, PRCM_HDMICLK_MGT);
+	/* PLLDIV=14, PLLSW=2, CLKEN=1 */
+	writel(PRCMU_DSI_LP_CLOCK_SETTING, PRCM_TVCLK_MGT);
+	return 0;
+}
+
+static void ack_dbb_wakeup(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	while (readl(PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
+		cpu_relax();
+
+	writeb(RMB0H_RD_WAKE_UP_ACK, PRCM_REQ_MB0_HEADER);
+	writel(MBOX_BIT(0), PRCM_MBOX_CPU_SET);
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+}
+
+static inline void print_unknown_header_warning(u8 n, u8 header)
+{
+	pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
+		header, n);
+}
+
+static bool read_mailbox_0(void)
+{
+	bool r;
+	u8 header;
+
+	header = readb(PRCM_ACK_MB0_HEADER);
+	switch (header) {
+	case AMB0H_WAKE_UP:
+		r = true;
+		break;
+	default:
+		print_unknown_header_warning(0, header);
+		r = false;
+		break;
+	}
+	writel(MBOX_BIT(0), PRCM_ARM_IT1_CLEAR);
+	return r;
+}
+
+static bool read_mailbox_1(void)
+{
+	writel(MBOX_BIT(1), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_2(void)
+{
+	writel(MBOX_BIT(2), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_3(void)
+{
+	writel(MBOX_BIT(3), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_4(void)
+{
+	writel(MBOX_BIT(4), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_5(void)
+{
+	u8 header;
+
+	header = readb(PRCM_ACK_MB5_HEADER);
+	switch (header) {
+	case MB5H_I2C_READ:
+		memcpy_fromio(mb5_transfer.ack.value, PRCM_ACK_MB5_I2C_DATA, 4);
+	case MB5H_I2C_WRITE:
+		mb5_transfer.ack.header = header;
+		mb5_transfer.ack.status = readb(PRCM_ACK_MB5_RETURN_CODE);
+		complete(&mb5_transfer.work);
+		break;
+	default:
+		print_unknown_header_warning(5, header);
+		break;
+	}
+	writel(MBOX_BIT(5), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_6(void)
+{
+	writel(MBOX_BIT(6), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool read_mailbox_7(void)
+{
+	writel(MBOX_BIT(7), PRCM_ARM_IT1_CLEAR);
+	return false;
+}
+
+static bool (* const read_mailbox[NUM_MB])(void) = {
+	read_mailbox_0,
+	read_mailbox_1,
+	read_mailbox_2,
+	read_mailbox_3,
+	read_mailbox_4,
+	read_mailbox_5,
+	read_mailbox_6,
+	read_mailbox_7
+};
+
+static irqreturn_t prcmu_irq_handler(int irq, void *data)
+{
+	u32 bits;
+	u8 n;
+	irqreturn_t r;
+
+	bits = (readl(PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
+	if (unlikely(!bits))
+		return IRQ_NONE;
+
+	r = IRQ_HANDLED;
+	for (n = 0; bits; n++) {
+		if (bits & MBOX_BIT(n)) {
+			bits -= MBOX_BIT(n);
+			if (read_mailbox[n]())
+				r = IRQ_WAKE_THREAD;
+		}
+	}
+	return r;
+}
+
+static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
+{
+	ack_dbb_wakeup();
+	return IRQ_HANDLED;
+}
+
+void __init db5500_prcmu_early_init(void)
+{
+	tcdm_base = __io_address(U5500_PRCMU_TCDM_BASE);
+	spin_lock_init(&mb0_transfer.lock);
+	mutex_init(&mb5_transfer.lock);
+	init_completion(&mb5_transfer.work);
+}
+
+/**
+ * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
+ *
+ */
+int __init db5500_prcmu_init(void)
+{
+	int r = 0;
+
+	if (ux500_is_svp() || !cpu_is_u5500())
+		return -ENODEV;
+
+	/* Clean up the mailbox interrupts after pre-kernel code. */
+	writel(ALL_MBOX_BITS, PRCM_ARM_IT1_CLEAR);
+
+	r = request_threaded_irq(IRQ_DB5500_PRCMU1, prcmu_irq_handler,
+		prcmu_irq_thread_fn, 0, "prcmu", NULL);
+	if (r < 0) {
+		pr_err("prcmu: Failed to allocate IRQ_DB5500_PRCMU1.\n");
+		return -EBUSY;
+	}
+	return 0;
+}
+
+arch_initcall(db5500_prcmu_init);
diff --git a/drivers/mfd/db8500-prcmu-regs.h b/drivers/mfd/db8500-prcmu-regs.h
new file mode 100644
index 000000000000..3bbf04d58043
--- /dev/null
+++ b/drivers/mfd/db8500-prcmu-regs.h
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ *
+ * License Terms: GNU General Public License v2
+ *
+ * PRCM Unit registers
+ */
+#ifndef __DB8500_PRCMU_REGS_H
+#define __DB8500_PRCMU_REGS_H
+
+#include <linux/bitops.h>
+#include <mach/hardware.h>
+
+#define BITS(_start, _end) ((BIT(_end) - BIT(_start)) + BIT(_end))
+
+#define PRCM_ARM_PLLDIVPS 0x118
+#define PRCM_ARM_PLLDIVPS_ARM_BRM_RATE	BITS(0, 5)
+#define PRCM_ARM_PLLDIVPS_MAX_MASK	0xF
+
+#define PRCM_PLLARM_LOCKP 0x0A8
+#define PRCM_PLLARM_LOCKP_PRCM_PLLARM_LOCKP3 BIT(1)
+
+#define PRCM_ARM_CHGCLKREQ 0x114
+#define PRCM_ARM_CHGCLKREQ_PRCM_ARM_CHGCLKREQ BIT(0)
+
+#define PRCM_PLLARM_ENABLE 0x98
+#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_ENABLE	BIT(0)
+#define PRCM_PLLARM_ENABLE_PRCM_PLLARM_COUNTON	BIT(8)
+
+#define PRCM_ARMCLKFIX_MGT	0x0
+#define PRCM_A9_RESETN_CLR	0x1f4
+#define PRCM_A9_RESETN_SET	0x1f0
+#define PRCM_ARM_LS_CLAMP	0x30C
+#define PRCM_SRAM_A9		0x308
+
+/* ARM WFI Standby signal register */
+#define PRCM_ARM_WFI_STANDBY	0x130
+#define PRCM_IOCR		0x310
+#define PRCM_IOCR_IOFORCE BIT(0)
+
+/* CPU mailbox registers */
+#define PRCM_MBOX_CPU_VAL 0x0FC
+#define PRCM_MBOX_CPU_SET 0x100
+
+/* Dual A9 core interrupt management unit registers */
+#define PRCM_A9_MASK_REQ 0x328
+#define PRCM_A9_MASK_REQ_PRCM_A9_MASK_REQ BIT(0)
+
+#define PRCM_A9_MASK_ACK	0x32C
+#define PRCM_ARMITMSK31TO0	0x11C
+#define PRCM_ARMITMSK63TO32	0x120
+#define PRCM_ARMITMSK95TO64	0x124
+#define PRCM_ARMITMSK127TO96	0x128
+#define PRCM_POWER_STATE_VAL	0x25C
+#define PRCM_ARMITVAL31TO0	0x260
+#define PRCM_ARMITVAL63TO32	0x264
+#define PRCM_ARMITVAL95TO64	0x268
+#define PRCM_ARMITVAL127TO96	0x26C
+
+#define PRCM_HOSTACCESS_REQ 0x334
+#define PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ BIT(0)
+
+#define PRCM_ARM_IT1_CLR 0x48C
+#define PRCM_ARM_IT1_VAL 0x494
+
+#define PRCM_ITSTATUS0		0x148
+#define PRCM_ITSTATUS1		0x150
+#define PRCM_ITSTATUS2		0x158
+#define PRCM_ITSTATUS3		0x160
+#define PRCM_ITSTATUS4		0x168
+#define PRCM_ITSTATUS5		0x484
+#define PRCM_ITCLEAR5		0x488
+#define PRCM_ARMIT_MASKXP70_IT	0x1018
+
+/* System reset register */
+#define PRCM_APE_SOFTRST 0x228
+
+/* Level shifter and clamp control registers */
+#define PRCM_MMIP_LS_CLAMP_SET 0x420
+#define PRCM_MMIP_LS_CLAMP_CLR 0x424
+
+/* PRCMU HW semaphore */
+#define PRCM_SEM 0x400
+#define PRCM_SEM_PRCM_SEM BIT(0)
+
+/* PRCMU clock/PLL/reset registers */
+#define PRCM_PLLDSI_FREQ	0x500
+#define PRCM_PLLDSI_ENABLE	0x504
+#define PRCM_PLLDSI_LOCKP	0x508
+#define PRCM_DSI_PLLOUT_SEL	0x530
+#define PRCM_DSITVCLK_DIV	0x52C
+#define PRCM_APE_RESETN_SET	0x1E4
+#define PRCM_APE_RESETN_CLR	0x1E8
+
+#define PRCM_TCR		0x1C8
+#define PRCM_TCR_TENSEL_MASK	BITS(0, 7)
+#define PRCM_TCR_STOP_TIMERS	BIT(16)
+#define PRCM_TCR_DOZE_MODE	BIT(17)
+
+#define PRCM_CLKOCR			0x1CC
+#define PRCM_CLKOCR_CLKODIV0_SHIFT	0
+#define PRCM_CLKOCR_CLKODIV0_MASK	BITS(0, 5)
+#define PRCM_CLKOCR_CLKOSEL0_SHIFT	6
+#define PRCM_CLKOCR_CLKOSEL0_MASK	BITS(6, 8)
+#define PRCM_CLKOCR_CLKODIV1_SHIFT	16
+#define PRCM_CLKOCR_CLKODIV1_MASK	BITS(16, 21)
+#define PRCM_CLKOCR_CLKOSEL1_SHIFT	22
+#define PRCM_CLKOCR_CLKOSEL1_MASK	BITS(22, 24)
+#define PRCM_CLKOCR_CLK1TYPE		BIT(28)
+
+#define PRCM_SGACLK_MGT		0x014
+#define PRCM_UARTCLK_MGT	0x018
+#define PRCM_MSP02CLK_MGT	0x01C
+#define PRCM_MSP1CLK_MGT	0x288
+#define PRCM_I2CCLK_MGT		0x020
+#define PRCM_SDMMCCLK_MGT	0x024
+#define PRCM_SLIMCLK_MGT	0x028
+#define PRCM_PER1CLK_MGT	0x02C
+#define PRCM_PER2CLK_MGT	0x030
+#define PRCM_PER3CLK_MGT	0x034
+#define PRCM_PER5CLK_MGT	0x038
+#define PRCM_PER6CLK_MGT	0x03C
+#define PRCM_PER7CLK_MGT	0x040
+#define PRCM_LCDCLK_MGT		0x044
+#define PRCM_BMLCLK_MGT		0x04C
+#define PRCM_HSITXCLK_MGT	0x050
+#define PRCM_HSIRXCLK_MGT	0x054
+#define PRCM_HDMICLK_MGT	0x058
+#define PRCM_APEATCLK_MGT	0x05C
+#define PRCM_APETRACECLK_MGT	0x060
+#define PRCM_MCDECLK_MGT	0x064
+#define PRCM_IPI2CCLK_MGT	0x068
+#define PRCM_DSIALTCLK_MGT	0x06C
+#define PRCM_DMACLK_MGT		0x074
+#define PRCM_B2R2CLK_MGT	0x078
+#define PRCM_TVCLK_MGT		0x07C
+#define PRCM_UNIPROCLK_MGT	0x278
+#define PRCM_SSPCLK_MGT		0x280
+#define PRCM_RNGCLK_MGT		0x284
+#define PRCM_UICCCLK_MGT	0x27C
+
+#define PRCM_CLK_MGT_CLKPLLDIV_MASK	BITS(0, 4)
+#define PRCM_CLK_MGT_CLKPLLSW_MASK	BITS(5, 7)
+#define PRCM_CLK_MGT_CLKEN		BIT(8)
+
+/* ePOD and memory power signal control registers */
+#define PRCM_EPOD_C_SET		0x410
+#define PRCM_SRAM_LS_SLEEP	0x304
+
+/* Debug power control unit registers */
+#define PRCM_POWER_STATE_SET 0x254
+
+/* Miscellaneous unit registers */
+#define PRCM_DSI_SW_RESET 0x324
+#define PRCM_GPIOCR		0x138
+
+/* GPIOCR register */
+#define PRCM_GPIOCR_SPI2_SELECT BIT(23)
+
+#define PRCM_DDR_SUBSYS_APE_MINBW  0x438
+
+#endif /* __DB8500_PRCMU_REGS_H */
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
new file mode 100644
index 000000000000..e63782107e2f
--- /dev/null
+++ b/drivers/mfd/db8500-prcmu.c
@@ -0,0 +1,2069 @@
+/*
+ * Copyright (C) STMicroelectronics 2009
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Kumar Sanghvi <kumar.sanghvi@stericsson.com>
+ * Author: Sundar Iyer <sundar.iyer@stericsson.com>
+ * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
+ *
+ * U8500 PRCM Unit interface driver
+ *
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/completion.h>
+#include <linux/irq.h>
+#include <linux/jiffies.h>
+#include <linux/bitops.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/db8500-prcmu.h>
+#include <linux/regulator/db8500-prcmu.h>
+#include <linux/regulator/machine.h>
+#include <mach/hardware.h>
+#include <mach/irqs.h>
+#include <mach/db8500-regs.h>
+#include <mach/id.h>
+#include "db8500-prcmu-regs.h"
+
+/* Offset for the firmware version within the TCPM */
+#define PRCMU_FW_VERSION_OFFSET 0xA4
+
+/* PRCMU project numbers, defined by PRCMU FW */
+#define PRCMU_PROJECT_ID_8500V1_0 1
+#define PRCMU_PROJECT_ID_8500V2_0 2
+#define PRCMU_PROJECT_ID_8400V2_0 3
+
+/* Index of different voltages to be used when accessing AVSData */
+#define PRCM_AVS_BASE		0x2FC
+#define PRCM_AVS_VBB_RET	(PRCM_AVS_BASE + 0x0)
+#define PRCM_AVS_VBB_MAX_OPP	(PRCM_AVS_BASE + 0x1)
+#define PRCM_AVS_VBB_100_OPP	(PRCM_AVS_BASE + 0x2)
+#define PRCM_AVS_VBB_50_OPP	(PRCM_AVS_BASE + 0x3)
+#define PRCM_AVS_VARM_MAX_OPP	(PRCM_AVS_BASE + 0x4)
+#define PRCM_AVS_VARM_100_OPP	(PRCM_AVS_BASE + 0x5)
+#define PRCM_AVS_VARM_50_OPP	(PRCM_AVS_BASE + 0x6)
+#define PRCM_AVS_VARM_RET	(PRCM_AVS_BASE + 0x7)
+#define PRCM_AVS_VAPE_100_OPP	(PRCM_AVS_BASE + 0x8)
+#define PRCM_AVS_VAPE_50_OPP	(PRCM_AVS_BASE + 0x9)
+#define PRCM_AVS_VMOD_100_OPP	(PRCM_AVS_BASE + 0xA)
+#define PRCM_AVS_VMOD_50_OPP	(PRCM_AVS_BASE + 0xB)
+#define PRCM_AVS_VSAFE		(PRCM_AVS_BASE + 0xC)
+
+#define PRCM_AVS_VOLTAGE		0
+#define PRCM_AVS_VOLTAGE_MASK		0x3f
+#define PRCM_AVS_ISSLOWSTARTUP		6
+#define PRCM_AVS_ISSLOWSTARTUP_MASK	(1 << PRCM_AVS_ISSLOWSTARTUP)
+#define PRCM_AVS_ISMODEENABLE		7
+#define PRCM_AVS_ISMODEENABLE_MASK	(1 << PRCM_AVS_ISMODEENABLE)
+
+#define PRCM_BOOT_STATUS	0xFFF
+#define PRCM_ROMCODE_A2P	0xFFE
+#define PRCM_ROMCODE_P2A	0xFFD
+#define PRCM_XP70_CUR_PWR_STATE 0xFFC      /* 4 BYTES */
+
+#define PRCM_SW_RST_REASON 0xFF8 /* 2 bytes */
+
+#define _PRCM_MBOX_HEADER		0xFE8 /* 16 bytes */
+#define PRCM_MBOX_HEADER_REQ_MB0	(_PRCM_MBOX_HEADER + 0x0)
+#define PRCM_MBOX_HEADER_REQ_MB1	(_PRCM_MBOX_HEADER + 0x1)
+#define PRCM_MBOX_HEADER_REQ_MB2	(_PRCM_MBOX_HEADER + 0x2)
+#define PRCM_MBOX_HEADER_REQ_MB3	(_PRCM_MBOX_HEADER + 0x3)
+#define PRCM_MBOX_HEADER_REQ_MB4	(_PRCM_MBOX_HEADER + 0x4)
+#define PRCM_MBOX_HEADER_REQ_MB5	(_PRCM_MBOX_HEADER + 0x5)
+#define PRCM_MBOX_HEADER_ACK_MB0	(_PRCM_MBOX_HEADER + 0x8)
+
+/* Req Mailboxes */
+#define PRCM_REQ_MB0 0xFDC /* 12 bytes  */
+#define PRCM_REQ_MB1 0xFD0 /* 12 bytes  */
+#define PRCM_REQ_MB2 0xFC0 /* 16 bytes  */
+#define PRCM_REQ_MB3 0xE4C /* 372 bytes  */
+#define PRCM_REQ_MB4 0xE48 /* 4 bytes  */
+#define PRCM_REQ_MB5 0xE44 /* 4 bytes  */
+
+/* Ack Mailboxes */
+#define PRCM_ACK_MB0 0xE08 /* 52 bytes  */
+#define PRCM_ACK_MB1 0xE04 /* 4 bytes */
+#define PRCM_ACK_MB2 0xE00 /* 4 bytes */
+#define PRCM_ACK_MB3 0xDFC /* 4 bytes */
+#define PRCM_ACK_MB4 0xDF8 /* 4 bytes */
+#define PRCM_ACK_MB5 0xDF4 /* 4 bytes */
+
+/* Mailbox 0 headers */
+#define MB0H_POWER_STATE_TRANS		0
+#define MB0H_CONFIG_WAKEUPS_EXE		1
+#define MB0H_READ_WAKEUP_ACK		3
+#define MB0H_CONFIG_WAKEUPS_SLEEP	4
+
+#define MB0H_WAKEUP_EXE 2
+#define MB0H_WAKEUP_SLEEP 5
+
+/* Mailbox 0 REQs */
+#define PRCM_REQ_MB0_AP_POWER_STATE	(PRCM_REQ_MB0 + 0x0)
+#define PRCM_REQ_MB0_AP_PLL_STATE	(PRCM_REQ_MB0 + 0x1)
+#define PRCM_REQ_MB0_ULP_CLOCK_STATE	(PRCM_REQ_MB0 + 0x2)
+#define PRCM_REQ_MB0_DO_NOT_WFI		(PRCM_REQ_MB0 + 0x3)
+#define PRCM_REQ_MB0_WAKEUP_8500	(PRCM_REQ_MB0 + 0x4)
+#define PRCM_REQ_MB0_WAKEUP_4500	(PRCM_REQ_MB0 + 0x8)
+
+/* Mailbox 0 ACKs */
+#define PRCM_ACK_MB0_AP_PWRSTTR_STATUS	(PRCM_ACK_MB0 + 0x0)
+#define PRCM_ACK_MB0_READ_POINTER	(PRCM_ACK_MB0 + 0x1)
+#define PRCM_ACK_MB0_WAKEUP_0_8500	(PRCM_ACK_MB0 + 0x4)
+#define PRCM_ACK_MB0_WAKEUP_0_4500	(PRCM_ACK_MB0 + 0x8)
+#define PRCM_ACK_MB0_WAKEUP_1_8500	(PRCM_ACK_MB0 + 0x1C)
+#define PRCM_ACK_MB0_WAKEUP_1_4500	(PRCM_ACK_MB0 + 0x20)
+#define PRCM_ACK_MB0_EVENT_4500_NUMBERS	20
+
+/* Mailbox 1 headers */
+#define MB1H_ARM_APE_OPP 0x0
+#define MB1H_RESET_MODEM 0x2
+#define MB1H_REQUEST_APE_OPP_100_VOLT 0x3
+#define MB1H_RELEASE_APE_OPP_100_VOLT 0x4
+#define MB1H_RELEASE_USB_WAKEUP 0x5
+
+/* Mailbox 1 Requests */
+#define PRCM_REQ_MB1_ARM_OPP			(PRCM_REQ_MB1 + 0x0)
+#define PRCM_REQ_MB1_APE_OPP			(PRCM_REQ_MB1 + 0x1)
+#define PRCM_REQ_MB1_APE_OPP_100_RESTORE	(PRCM_REQ_MB1 + 0x4)
+#define PRCM_REQ_MB1_ARM_OPP_100_RESTORE	(PRCM_REQ_MB1 + 0x8)
+
+/* Mailbox 1 ACKs */
+#define PRCM_ACK_MB1_CURRENT_ARM_OPP	(PRCM_ACK_MB1 + 0x0)
+#define PRCM_ACK_MB1_CURRENT_APE_OPP	(PRCM_ACK_MB1 + 0x1)
+#define PRCM_ACK_MB1_APE_VOLTAGE_STATUS	(PRCM_ACK_MB1 + 0x2)
+#define PRCM_ACK_MB1_DVFS_STATUS	(PRCM_ACK_MB1 + 0x3)
+
+/* Mailbox 2 headers */
+#define MB2H_DPS	0x0
+#define MB2H_AUTO_PWR	0x1
+
+/* Mailbox 2 REQs */
+#define PRCM_REQ_MB2_SVA_MMDSP		(PRCM_REQ_MB2 + 0x0)
+#define PRCM_REQ_MB2_SVA_PIPE		(PRCM_REQ_MB2 + 0x1)
+#define PRCM_REQ_MB2_SIA_MMDSP		(PRCM_REQ_MB2 + 0x2)
+#define PRCM_REQ_MB2_SIA_PIPE		(PRCM_REQ_MB2 + 0x3)
+#define PRCM_REQ_MB2_SGA		(PRCM_REQ_MB2 + 0x4)
+#define PRCM_REQ_MB2_B2R2_MCDE		(PRCM_REQ_MB2 + 0x5)
+#define PRCM_REQ_MB2_ESRAM12		(PRCM_REQ_MB2 + 0x6)
+#define PRCM_REQ_MB2_ESRAM34		(PRCM_REQ_MB2 + 0x7)
+#define PRCM_REQ_MB2_AUTO_PM_SLEEP	(PRCM_REQ_MB2 + 0x8)
+#define PRCM_REQ_MB2_AUTO_PM_IDLE	(PRCM_REQ_MB2 + 0xC)
+
+/* Mailbox 2 ACKs */
+#define PRCM_ACK_MB2_DPS_STATUS (PRCM_ACK_MB2 + 0x0)
+#define HWACC_PWR_ST_OK 0xFE
+
+/* Mailbox 3 headers */
+#define MB3H_ANC	0x0
+#define MB3H_SIDETONE	0x1
+#define MB3H_SYSCLK	0xE
+
+/* Mailbox 3 Requests */
+#define PRCM_REQ_MB3_ANC_FIR_COEFF	(PRCM_REQ_MB3 + 0x0)
+#define PRCM_REQ_MB3_ANC_IIR_COEFF	(PRCM_REQ_MB3 + 0x20)
+#define PRCM_REQ_MB3_ANC_SHIFTER	(PRCM_REQ_MB3 + 0x60)
+#define PRCM_REQ_MB3_ANC_WARP		(PRCM_REQ_MB3 + 0x64)
+#define PRCM_REQ_MB3_SIDETONE_FIR_GAIN	(PRCM_REQ_MB3 + 0x68)
+#define PRCM_REQ_MB3_SIDETONE_FIR_COEFF	(PRCM_REQ_MB3 + 0x6C)
+#define PRCM_REQ_MB3_SYSCLK_MGT		(PRCM_REQ_MB3 + 0x16C)
+
+/* Mailbox 4 headers */
+#define MB4H_DDR_INIT	0x0
+#define MB4H_MEM_ST	0x1
+#define MB4H_HOTDOG	0x12
+#define MB4H_HOTMON	0x13
+#define MB4H_HOT_PERIOD	0x14
+
+/* Mailbox 4 Requests */
+#define PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE	(PRCM_REQ_MB4 + 0x0)
+#define PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE	(PRCM_REQ_MB4 + 0x1)
+#define PRCM_REQ_MB4_ESRAM0_ST			(PRCM_REQ_MB4 + 0x3)
+#define PRCM_REQ_MB4_HOTDOG_THRESHOLD		(PRCM_REQ_MB4 + 0x0)
+#define PRCM_REQ_MB4_HOTMON_LOW			(PRCM_REQ_MB4 + 0x0)
+#define PRCM_REQ_MB4_HOTMON_HIGH		(PRCM_REQ_MB4 + 0x1)
+#define PRCM_REQ_MB4_HOTMON_CONFIG		(PRCM_REQ_MB4 + 0x2)
+#define PRCM_REQ_MB4_HOT_PERIOD			(PRCM_REQ_MB4 + 0x0)
+#define HOTMON_CONFIG_LOW			BIT(0)
+#define HOTMON_CONFIG_HIGH			BIT(1)
+
+/* Mailbox 5 Requests */
+#define PRCM_REQ_MB5_I2C_SLAVE_OP	(PRCM_REQ_MB5 + 0x0)
+#define PRCM_REQ_MB5_I2C_HW_BITS	(PRCM_REQ_MB5 + 0x1)
+#define PRCM_REQ_MB5_I2C_REG		(PRCM_REQ_MB5 + 0x2)
+#define PRCM_REQ_MB5_I2C_VAL		(PRCM_REQ_MB5 + 0x3)
+#define PRCMU_I2C_WRITE(slave) \
+	(((slave) << 1) | (cpu_is_u8500v2() ? BIT(6) : 0))
+#define PRCMU_I2C_READ(slave) \
+	(((slave) << 1) | BIT(0) | (cpu_is_u8500v2() ? BIT(6) : 0))
+#define PRCMU_I2C_STOP_EN		BIT(3)
+
+/* Mailbox 5 ACKs */
+#define PRCM_ACK_MB5_I2C_STATUS	(PRCM_ACK_MB5 + 0x1)
+#define PRCM_ACK_MB5_I2C_VAL	(PRCM_ACK_MB5 + 0x3)
+#define I2C_WR_OK 0x1
+#define I2C_RD_OK 0x2
+
+#define NUM_MB 8
+#define MBOX_BIT BIT
+#define ALL_MBOX_BITS (MBOX_BIT(NUM_MB) - 1)
+
+/*
+ * Wakeups/IRQs
+ */
+
+#define WAKEUP_BIT_RTC BIT(0)
+#define WAKEUP_BIT_RTT0 BIT(1)
+#define WAKEUP_BIT_RTT1 BIT(2)
+#define WAKEUP_BIT_HSI0 BIT(3)
+#define WAKEUP_BIT_HSI1 BIT(4)
+#define WAKEUP_BIT_CA_WAKE BIT(5)
+#define WAKEUP_BIT_USB BIT(6)
+#define WAKEUP_BIT_ABB BIT(7)
+#define WAKEUP_BIT_ABB_FIFO BIT(8)
+#define WAKEUP_BIT_SYSCLK_OK BIT(9)
+#define WAKEUP_BIT_CA_SLEEP BIT(10)
+#define WAKEUP_BIT_AC_WAKE_ACK BIT(11)
+#define WAKEUP_BIT_SIDE_TONE_OK BIT(12)
+#define WAKEUP_BIT_ANC_OK BIT(13)
+#define WAKEUP_BIT_SW_ERROR BIT(14)
+#define WAKEUP_BIT_AC_SLEEP_ACK BIT(15)
+#define WAKEUP_BIT_ARM BIT(17)
+#define WAKEUP_BIT_HOTMON_LOW BIT(18)
+#define WAKEUP_BIT_HOTMON_HIGH BIT(19)
+#define WAKEUP_BIT_MODEM_SW_RESET_REQ BIT(20)
+#define WAKEUP_BIT_GPIO0 BIT(23)
+#define WAKEUP_BIT_GPIO1 BIT(24)
+#define WAKEUP_BIT_GPIO2 BIT(25)
+#define WAKEUP_BIT_GPIO3 BIT(26)
+#define WAKEUP_BIT_GPIO4 BIT(27)
+#define WAKEUP_BIT_GPIO5 BIT(28)
+#define WAKEUP_BIT_GPIO6 BIT(29)
+#define WAKEUP_BIT_GPIO7 BIT(30)
+#define WAKEUP_BIT_GPIO8 BIT(31)
+
+/*
+ * This vector maps irq numbers to the bits in the bit field used in
+ * communication with the PRCMU firmware.
+ *
+ * The reason for having this is to keep the irq numbers contiguous even though
+ * the bits in the bit field are not. (The bits also have a tendency to move
+ * around, to further complicate matters.)
+ */
+#define IRQ_INDEX(_name) ((IRQ_PRCMU_##_name) - IRQ_PRCMU_BASE)
+#define IRQ_ENTRY(_name)[IRQ_INDEX(_name)] = (WAKEUP_BIT_##_name)
+static u32 prcmu_irq_bit[NUM_PRCMU_WAKEUPS] = {
+	IRQ_ENTRY(RTC),
+	IRQ_ENTRY(RTT0),
+	IRQ_ENTRY(RTT1),
+	IRQ_ENTRY(HSI0),
+	IRQ_ENTRY(HSI1),
+	IRQ_ENTRY(CA_WAKE),
+	IRQ_ENTRY(USB),
+	IRQ_ENTRY(ABB),
+	IRQ_ENTRY(ABB_FIFO),
+	IRQ_ENTRY(CA_SLEEP),
+	IRQ_ENTRY(ARM),
+	IRQ_ENTRY(HOTMON_LOW),
+	IRQ_ENTRY(HOTMON_HIGH),
+	IRQ_ENTRY(MODEM_SW_RESET_REQ),
+	IRQ_ENTRY(GPIO0),
+	IRQ_ENTRY(GPIO1),
+	IRQ_ENTRY(GPIO2),
+	IRQ_ENTRY(GPIO3),
+	IRQ_ENTRY(GPIO4),
+	IRQ_ENTRY(GPIO5),
+	IRQ_ENTRY(GPIO6),
+	IRQ_ENTRY(GPIO7),
+	IRQ_ENTRY(GPIO8)
+};
+
+#define VALID_WAKEUPS (BIT(NUM_PRCMU_WAKEUP_INDICES) - 1)
+#define WAKEUP_ENTRY(_name)[PRCMU_WAKEUP_INDEX_##_name] = (WAKEUP_BIT_##_name)
+static u32 prcmu_wakeup_bit[NUM_PRCMU_WAKEUP_INDICES] = {
+	WAKEUP_ENTRY(RTC),
+	WAKEUP_ENTRY(RTT0),
+	WAKEUP_ENTRY(RTT1),
+	WAKEUP_ENTRY(HSI0),
+	WAKEUP_ENTRY(HSI1),
+	WAKEUP_ENTRY(USB),
+	WAKEUP_ENTRY(ABB),
+	WAKEUP_ENTRY(ABB_FIFO),
+	WAKEUP_ENTRY(ARM)
+};
+
+/*
+ * mb0_transfer - state needed for mailbox 0 communication.
+ * @lock:		The transaction lock.
+ * @dbb_events_lock:	A lock used to handle concurrent access to (parts of)
+ *			the request data.
+ * @mask_work:		Work structure used for (un)masking wakeup interrupts.
+ * @req:		Request data that need to persist between requests.
+ */
+static struct {
+	spinlock_t lock;
+	spinlock_t dbb_irqs_lock;
+	struct work_struct mask_work;
+	struct mutex ac_wake_lock;
+	struct completion ac_wake_work;
+	struct {
+		u32 dbb_irqs;
+		u32 dbb_wakeups;
+		u32 abb_events;
+	} req;
+} mb0_transfer;
+
+/*
+ * mb1_transfer - state needed for mailbox 1 communication.
+ * @lock:	The transaction lock.
+ * @work:	The transaction completion structure.
+ * @ack:	Reply ("acknowledge") data.
+ */
+static struct {
+	struct mutex lock;
+	struct completion work;
+	struct {
+		u8 header;
+		u8 arm_opp;
+		u8 ape_opp;
+		u8 ape_voltage_status;
+	} ack;
+} mb1_transfer;
+
+/*
+ * mb2_transfer - state needed for mailbox 2 communication.
+ * @lock:            The transaction lock.
+ * @work:            The transaction completion structure.
+ * @auto_pm_lock:    The autonomous power management configuration lock.
+ * @auto_pm_enabled: A flag indicating whether autonomous PM is enabled.
+ * @req:             Request data that need to persist between requests.
+ * @ack:             Reply ("acknowledge") data.
+ */
+static struct {
+	struct mutex lock;
+	struct completion work;
+	spinlock_t auto_pm_lock;
+	bool auto_pm_enabled;
+	struct {
+		u8 status;
+	} ack;
+} mb2_transfer;
+
+/*
+ * mb3_transfer - state needed for mailbox 3 communication.
+ * @lock:		The request lock.
+ * @sysclk_lock:	A lock used to handle concurrent sysclk requests.
+ * @sysclk_work:	Work structure used for sysclk requests.
+ */
+static struct {
+	spinlock_t lock;
+	struct mutex sysclk_lock;
+	struct completion sysclk_work;
+} mb3_transfer;
+
+/*
+ * mb4_transfer - state needed for mailbox 4 communication.
+ * @lock:	The transaction lock.
+ * @work:	The transaction completion structure.
+ */
+static struct {
+	struct mutex lock;
+	struct completion work;
+} mb4_transfer;
+
+/*
+ * mb5_transfer - state needed for mailbox 5 communication.
+ * @lock:	The transaction lock.
+ * @work:	The transaction completion structure.
+ * @ack:	Reply ("acknowledge") data.
+ */
+static struct {
+	struct mutex lock;
+	struct completion work;
+	struct {
+		u8 status;
+		u8 value;
+	} ack;
+} mb5_transfer;
+
+static atomic_t ac_wake_req_state = ATOMIC_INIT(0);
+
+/* Spinlocks */
+static DEFINE_SPINLOCK(clkout_lock);
+static DEFINE_SPINLOCK(gpiocr_lock);
+
+/* Global var to runtime determine TCDM base for v2 or v1 */
+static __iomem void *tcdm_base;
+
+struct clk_mgt {
+	unsigned int offset;
+	u32 pllsw;
+};
+
+static DEFINE_SPINLOCK(clk_mgt_lock);
+
+#define CLK_MGT_ENTRY(_name)[PRCMU_##_name] = { (PRCM_##_name##_MGT), 0 }
+struct clk_mgt clk_mgt[PRCMU_NUM_REG_CLOCKS] = {
+	CLK_MGT_ENTRY(SGACLK),
+	CLK_MGT_ENTRY(UARTCLK),
+	CLK_MGT_ENTRY(MSP02CLK),
+	CLK_MGT_ENTRY(MSP1CLK),
+	CLK_MGT_ENTRY(I2CCLK),
+	CLK_MGT_ENTRY(SDMMCCLK),
+	CLK_MGT_ENTRY(SLIMCLK),
+	CLK_MGT_ENTRY(PER1CLK),
+	CLK_MGT_ENTRY(PER2CLK),
+	CLK_MGT_ENTRY(PER3CLK),
+	CLK_MGT_ENTRY(PER5CLK),
+	CLK_MGT_ENTRY(PER6CLK),
+	CLK_MGT_ENTRY(PER7CLK),
+	CLK_MGT_ENTRY(LCDCLK),
+	CLK_MGT_ENTRY(BMLCLK),
+	CLK_MGT_ENTRY(HSITXCLK),
+	CLK_MGT_ENTRY(HSIRXCLK),
+	CLK_MGT_ENTRY(HDMICLK),
+	CLK_MGT_ENTRY(APEATCLK),
+	CLK_MGT_ENTRY(APETRACECLK),
+	CLK_MGT_ENTRY(MCDECLK),
+	CLK_MGT_ENTRY(IPI2CCLK),
+	CLK_MGT_ENTRY(DSIALTCLK),
+	CLK_MGT_ENTRY(DMACLK),
+	CLK_MGT_ENTRY(B2R2CLK),
+	CLK_MGT_ENTRY(TVCLK),
+	CLK_MGT_ENTRY(SSPCLK),
+	CLK_MGT_ENTRY(RNGCLK),
+	CLK_MGT_ENTRY(UICCCLK),
+};
+
+/*
+* Used by MCDE to setup all necessary PRCMU registers
+*/
+#define PRCMU_RESET_DSIPLL		0x00004000
+#define PRCMU_UNCLAMP_DSIPLL		0x00400800
+
+#define PRCMU_CLK_PLL_DIV_SHIFT		0
+#define PRCMU_CLK_PLL_SW_SHIFT		5
+#define PRCMU_CLK_38			(1 << 9)
+#define PRCMU_CLK_38_SRC		(1 << 10)
+#define PRCMU_CLK_38_DIV		(1 << 11)
+
+/* PLLDIV=12, PLLSW=4 (PLLDDR) */
+#define PRCMU_DSI_CLOCK_SETTING		0x0000008C
+
+/* PLLDIV=8, PLLSW=4 (PLLDDR) */
+#define PRCMU_DSI_CLOCK_SETTING_U8400	0x00000088
+
+/* DPI 50000000 Hz */
+#define PRCMU_DPI_CLOCK_SETTING		((1 << PRCMU_CLK_PLL_SW_SHIFT) | \
+					  (16 << PRCMU_CLK_PLL_DIV_SHIFT))
+#define PRCMU_DSI_LP_CLOCK_SETTING	0x00000E00
+
+/* D=101, N=1, R=4, SELDIV2=0 */
+#define PRCMU_PLLDSI_FREQ_SETTING	0x00040165
+
+/* D=70, N=1, R=3, SELDIV2=0 */
+#define PRCMU_PLLDSI_FREQ_SETTING_U8400	0x00030146
+
+#define PRCMU_ENABLE_PLLDSI		0x00000001
+#define PRCMU_DISABLE_PLLDSI		0x00000000
+#define PRCMU_RELEASE_RESET_DSS		0x0000400C
+#define PRCMU_DSI_PLLOUT_SEL_SETTING	0x00000202
+/* ESC clk, div0=1, div1=1, div2=3 */
+#define PRCMU_ENABLE_ESCAPE_CLOCK_DIV	0x07030101
+#define PRCMU_DISABLE_ESCAPE_CLOCK_DIV	0x00030101
+#define PRCMU_DSI_RESET_SW		0x00000007
+
+#define PRCMU_PLLDSI_LOCKP_LOCKED	0x3
+
+static struct {
+	u8 project_number;
+	u8 api_version;
+	u8 func_version;
+	u8 errata;
+} prcmu_version;
+
+
+int prcmu_enable_dsipll(void)
+{
+	int i;
+	unsigned int plldsifreq;
+
+	/* Clear DSIPLL_RESETN */
+	writel(PRCMU_RESET_DSIPLL, (_PRCMU_BASE + PRCM_APE_RESETN_CLR));
+	/* Unclamp DSIPLL in/out */
+	writel(PRCMU_UNCLAMP_DSIPLL, (_PRCMU_BASE + PRCM_MMIP_LS_CLAMP_CLR));
+
+	if (prcmu_is_u8400())
+		plldsifreq = PRCMU_PLLDSI_FREQ_SETTING_U8400;
+	else
+		plldsifreq = PRCMU_PLLDSI_FREQ_SETTING;
+	/* Set DSI PLL FREQ */
+	writel(plldsifreq, (_PRCMU_BASE + PRCM_PLLDSI_FREQ));
+	writel(PRCMU_DSI_PLLOUT_SEL_SETTING,
+		(_PRCMU_BASE + PRCM_DSI_PLLOUT_SEL));
+	/* Enable Escape clocks */
+	writel(PRCMU_ENABLE_ESCAPE_CLOCK_DIV,
+					(_PRCMU_BASE + PRCM_DSITVCLK_DIV));
+
+	/* Start DSI PLL */
+	writel(PRCMU_ENABLE_PLLDSI, (_PRCMU_BASE + PRCM_PLLDSI_ENABLE));
+	/* Reset DSI PLL */
+	writel(PRCMU_DSI_RESET_SW, (_PRCMU_BASE + PRCM_DSI_SW_RESET));
+	for (i = 0; i < 10; i++) {
+		if ((readl(_PRCMU_BASE + PRCM_PLLDSI_LOCKP) &
+			PRCMU_PLLDSI_LOCKP_LOCKED)
+					== PRCMU_PLLDSI_LOCKP_LOCKED)
+			break;
+		udelay(100);
+	}
+	/* Set DSIPLL_RESETN */
+	writel(PRCMU_RESET_DSIPLL, (_PRCMU_BASE + PRCM_APE_RESETN_SET));
+	return 0;
+}
+
+int prcmu_disable_dsipll(void)
+{
+	/* Disable dsi pll */
+	writel(PRCMU_DISABLE_PLLDSI, (_PRCMU_BASE + PRCM_PLLDSI_ENABLE));
+	/* Disable  escapeclock */
+	writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV,
+					(_PRCMU_BASE + PRCM_DSITVCLK_DIV));
+	return 0;
+}
+
+int prcmu_set_display_clocks(void)
+{
+	unsigned long flags;
+	unsigned int dsiclk;
+
+	if (prcmu_is_u8400())
+		dsiclk = PRCMU_DSI_CLOCK_SETTING_U8400;
+	else
+		dsiclk = PRCMU_DSI_CLOCK_SETTING;
+
+	spin_lock_irqsave(&clk_mgt_lock, flags);
+
+	/* Grab the HW semaphore. */
+	while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
+		cpu_relax();
+
+	writel(dsiclk, (_PRCMU_BASE + PRCM_HDMICLK_MGT));
+	writel(PRCMU_DSI_LP_CLOCK_SETTING, (_PRCMU_BASE + PRCM_TVCLK_MGT));
+	writel(PRCMU_DPI_CLOCK_SETTING, (_PRCMU_BASE + PRCM_LCDCLK_MGT));
+
+	/* Release the HW semaphore. */
+	writel(0, (_PRCMU_BASE + PRCM_SEM));
+
+	spin_unlock_irqrestore(&clk_mgt_lock, flags);
+
+	return 0;
+}
+
+/**
+ * prcmu_enable_spi2 - Enables pin muxing for SPI2 on OtherAlternateC1.
+ */
+void prcmu_enable_spi2(void)
+{
+	u32 reg;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpiocr_lock, flags);
+	reg = readl(_PRCMU_BASE + PRCM_GPIOCR);
+	writel(reg | PRCM_GPIOCR_SPI2_SELECT, _PRCMU_BASE + PRCM_GPIOCR);
+	spin_unlock_irqrestore(&gpiocr_lock, flags);
+}
+
+/**
+ * prcmu_disable_spi2 - Disables pin muxing for SPI2 on OtherAlternateC1.
+ */
+void prcmu_disable_spi2(void)
+{
+	u32 reg;
+	unsigned long flags;
+
+	spin_lock_irqsave(&gpiocr_lock, flags);
+	reg = readl(_PRCMU_BASE + PRCM_GPIOCR);
+	writel(reg & ~PRCM_GPIOCR_SPI2_SELECT, _PRCMU_BASE + PRCM_GPIOCR);
+	spin_unlock_irqrestore(&gpiocr_lock, flags);
+}
+
+bool prcmu_has_arm_maxopp(void)
+{
+	return (readb(tcdm_base + PRCM_AVS_VARM_MAX_OPP) &
+		PRCM_AVS_ISMODEENABLE_MASK) == PRCM_AVS_ISMODEENABLE_MASK;
+}
+
+bool prcmu_is_u8400(void)
+{
+	return prcmu_version.project_number == PRCMU_PROJECT_ID_8400V2_0;
+}
+
+/**
+ * prcmu_get_boot_status - PRCMU boot status checking
+ * Returns: the current PRCMU boot status
+ */
+int prcmu_get_boot_status(void)
+{
+	return readb(tcdm_base + PRCM_BOOT_STATUS);
+}
+
+/**
+ * prcmu_set_rc_a2p - This function is used to run few power state sequences
+ * @val: Value to be set, i.e. transition requested
+ * Returns: 0 on success, -EINVAL on invalid argument
+ *
+ * This function is used to run the following power state sequences -
+ * any state to ApReset,  ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
+ */
+int prcmu_set_rc_a2p(enum romcode_write val)
+{
+	if (val < RDY_2_DS || val > RDY_2_XP70_RST)
+		return -EINVAL;
+	writeb(val, (tcdm_base + PRCM_ROMCODE_A2P));
+	return 0;
+}
+
+/**
+ * prcmu_get_rc_p2a - This function is used to get power state sequences
+ * Returns: the power transition that has last happened
+ *
+ * This function can return the following transitions-
+ * any state to ApReset,  ApDeepSleep to ApExecute, ApExecute to ApDeepSleep
+ */
+enum romcode_read prcmu_get_rc_p2a(void)
+{
+	return readb(tcdm_base + PRCM_ROMCODE_P2A);
+}
+
+/**
+ * prcmu_get_current_mode - Return the current XP70 power mode
+ * Returns: Returns the current AP(ARM) power mode: init,
+ * apBoot, apExecute, apDeepSleep, apSleep, apIdle, apReset
+ */
+enum ap_pwrst prcmu_get_xp70_current_state(void)
+{
+	return readb(tcdm_base + PRCM_XP70_CUR_PWR_STATE);
+}
+
+/**
+ * prcmu_config_clkout - Configure one of the programmable clock outputs.
+ * @clkout:	The CLKOUT number (0 or 1).
+ * @source:	The clock to be used (one of the PRCMU_CLKSRC_*).
+ * @div:	The divider to be applied.
+ *
+ * Configures one of the programmable clock outputs (CLKOUTs).
+ * @div should be in the range [1,63] to request a configuration, or 0 to
+ * inform that the configuration is no longer requested.
+ */
+int prcmu_config_clkout(u8 clkout, u8 source, u8 div)
+{
+	static int requests[2];
+	int r = 0;
+	unsigned long flags;
+	u32 val;
+	u32 bits;
+	u32 mask;
+	u32 div_mask;
+
+	BUG_ON(clkout > 1);
+	BUG_ON(div > 63);
+	BUG_ON((clkout == 0) && (source > PRCMU_CLKSRC_CLK009));
+
+	if (!div && !requests[clkout])
+		return -EINVAL;
+
+	switch (clkout) {
+	case 0:
+		div_mask = PRCM_CLKOCR_CLKODIV0_MASK;
+		mask = (PRCM_CLKOCR_CLKODIV0_MASK | PRCM_CLKOCR_CLKOSEL0_MASK);
+		bits = ((source << PRCM_CLKOCR_CLKOSEL0_SHIFT) |
+			(div << PRCM_CLKOCR_CLKODIV0_SHIFT));
+		break;
+	case 1:
+		div_mask = PRCM_CLKOCR_CLKODIV1_MASK;
+		mask = (PRCM_CLKOCR_CLKODIV1_MASK | PRCM_CLKOCR_CLKOSEL1_MASK |
+			PRCM_CLKOCR_CLK1TYPE);
+		bits = ((source << PRCM_CLKOCR_CLKOSEL1_SHIFT) |
+			(div << PRCM_CLKOCR_CLKODIV1_SHIFT));
+		break;
+	}
+	bits &= mask;
+
+	spin_lock_irqsave(&clkout_lock, flags);
+
+	val = readl(_PRCMU_BASE + PRCM_CLKOCR);
+	if (val & div_mask) {
+		if (div) {
+			if ((val & mask) != bits) {
+				r = -EBUSY;
+				goto unlock_and_return;
+			}
+		} else {
+			if ((val & mask & ~div_mask) != bits) {
+				r = -EINVAL;
+				goto unlock_and_return;
+			}
+		}
+	}
+	writel((bits | (val & ~mask)), (_PRCMU_BASE + PRCM_CLKOCR));
+	requests[clkout] += (div ? 1 : -1);
+
+unlock_and_return:
+	spin_unlock_irqrestore(&clkout_lock, flags);
+
+	return r;
+}
+
+int prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll)
+{
+	unsigned long flags;
+
+	BUG_ON((state < PRCMU_AP_SLEEP) || (PRCMU_AP_DEEP_IDLE < state));
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
+		cpu_relax();
+
+	writeb(MB0H_POWER_STATE_TRANS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
+	writeb(state, (tcdm_base + PRCM_REQ_MB0_AP_POWER_STATE));
+	writeb((keep_ap_pll ? 1 : 0), (tcdm_base + PRCM_REQ_MB0_AP_PLL_STATE));
+	writeb((keep_ulp_clk ? 1 : 0),
+		(tcdm_base + PRCM_REQ_MB0_ULP_CLOCK_STATE));
+	writeb(0, (tcdm_base + PRCM_REQ_MB0_DO_NOT_WFI));
+	writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+
+	return 0;
+}
+
+/* This function should only be called while mb0_transfer.lock is held. */
+static void config_wakeups(void)
+{
+	const u8 header[2] = {
+		MB0H_CONFIG_WAKEUPS_EXE,
+		MB0H_CONFIG_WAKEUPS_SLEEP
+	};
+	static u32 last_dbb_events;
+	static u32 last_abb_events;
+	u32 dbb_events;
+	u32 abb_events;
+	unsigned int i;
+
+	dbb_events = mb0_transfer.req.dbb_irqs | mb0_transfer.req.dbb_wakeups;
+	dbb_events |= (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK);
+
+	abb_events = mb0_transfer.req.abb_events;
+
+	if ((dbb_events == last_dbb_events) && (abb_events == last_abb_events))
+		return;
+
+	for (i = 0; i < 2; i++) {
+		while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
+			cpu_relax();
+		writel(dbb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_8500));
+		writel(abb_events, (tcdm_base + PRCM_REQ_MB0_WAKEUP_4500));
+		writeb(header[i], (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
+		writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	}
+	last_dbb_events = dbb_events;
+	last_abb_events = abb_events;
+}
+
+void prcmu_enable_wakeups(u32 wakeups)
+{
+	unsigned long flags;
+	u32 bits;
+	int i;
+
+	BUG_ON(wakeups != (wakeups & VALID_WAKEUPS));
+
+	for (i = 0, bits = 0; i < NUM_PRCMU_WAKEUP_INDICES; i++) {
+		if (wakeups & BIT(i))
+			bits |= prcmu_wakeup_bit[i];
+	}
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	mb0_transfer.req.dbb_wakeups = bits;
+	config_wakeups();
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+}
+
+void prcmu_config_abb_event_readout(u32 abb_events)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	mb0_transfer.req.abb_events = abb_events;
+	config_wakeups();
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+}
+
+void prcmu_get_abb_event_buffer(void __iomem **buf)
+{
+	if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
+		*buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_1_4500);
+	else
+		*buf = (tcdm_base + PRCM_ACK_MB0_WAKEUP_0_4500);
+}
+
+/**
+ * prcmu_set_arm_opp - set the appropriate ARM OPP
+ * @opp: The new ARM operating point to which transition is to be made
+ * Returns: 0 on success, non-zero on failure
+ *
+ * This function sets the the operating point of the ARM.
+ */
+int prcmu_set_arm_opp(u8 opp)
+{
+	int r;
+
+	if (opp < ARM_NO_CHANGE || opp > ARM_EXTCLK)
+		return -EINVAL;
+
+	r = 0;
+
+	mutex_lock(&mb1_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
+		cpu_relax();
+
+	writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
+	writeb(opp, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
+	writeb(APE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
+
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb1_transfer.work);
+
+	if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
+		(mb1_transfer.ack.arm_opp != opp))
+		r = -EIO;
+
+	mutex_unlock(&mb1_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_get_arm_opp - get the current ARM OPP
+ *
+ * Returns: the current ARM OPP
+ */
+int prcmu_get_arm_opp(void)
+{
+	return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_ARM_OPP);
+}
+
+/**
+ * prcmu_get_ddr_opp - get the current DDR OPP
+ *
+ * Returns: the current DDR OPP
+ */
+int prcmu_get_ddr_opp(void)
+{
+	return readb(_PRCMU_BASE + PRCM_DDR_SUBSYS_APE_MINBW);
+}
+
+/**
+ * set_ddr_opp - set the appropriate DDR OPP
+ * @opp: The new DDR operating point to which transition is to be made
+ * Returns: 0 on success, non-zero on failure
+ *
+ * This function sets the operating point of the DDR.
+ */
+int prcmu_set_ddr_opp(u8 opp)
+{
+	if (opp < DDR_100_OPP || opp > DDR_25_OPP)
+		return -EINVAL;
+	/* Changing the DDR OPP can hang the hardware pre-v21 */
+	if (cpu_is_u8500v20_or_later() && !cpu_is_u8500v20())
+		writeb(opp, (_PRCMU_BASE + PRCM_DDR_SUBSYS_APE_MINBW));
+
+	return 0;
+}
+/**
+ * set_ape_opp - set the appropriate APE OPP
+ * @opp: The new APE operating point to which transition is to be made
+ * Returns: 0 on success, non-zero on failure
+ *
+ * This function sets the operating point of the APE.
+ */
+int prcmu_set_ape_opp(u8 opp)
+{
+	int r = 0;
+
+	mutex_lock(&mb1_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
+		cpu_relax();
+
+	writeb(MB1H_ARM_APE_OPP, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
+	writeb(ARM_NO_CHANGE, (tcdm_base + PRCM_REQ_MB1_ARM_OPP));
+	writeb(opp, (tcdm_base + PRCM_REQ_MB1_APE_OPP));
+
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb1_transfer.work);
+
+	if ((mb1_transfer.ack.header != MB1H_ARM_APE_OPP) ||
+		(mb1_transfer.ack.ape_opp != opp))
+		r = -EIO;
+
+	mutex_unlock(&mb1_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_get_ape_opp - get the current APE OPP
+ *
+ * Returns: the current APE OPP
+ */
+int prcmu_get_ape_opp(void)
+{
+	return readb(tcdm_base + PRCM_ACK_MB1_CURRENT_APE_OPP);
+}
+
+/**
+ * prcmu_request_ape_opp_100_voltage - Request APE OPP 100% voltage
+ * @enable: true to request the higher voltage, false to drop a request.
+ *
+ * Calls to this function to enable and disable requests must be balanced.
+ */
+int prcmu_request_ape_opp_100_voltage(bool enable)
+{
+	int r = 0;
+	u8 header;
+	static unsigned int requests;
+
+	mutex_lock(&mb1_transfer.lock);
+
+	if (enable) {
+		if (0 != requests++)
+			goto unlock_and_return;
+		header = MB1H_REQUEST_APE_OPP_100_VOLT;
+	} else {
+		if (requests == 0) {
+			r = -EIO;
+			goto unlock_and_return;
+		} else if (1 != requests--) {
+			goto unlock_and_return;
+		}
+		header = MB1H_RELEASE_APE_OPP_100_VOLT;
+	}
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
+		cpu_relax();
+
+	writeb(header, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
+
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb1_transfer.work);
+
+	if ((mb1_transfer.ack.header != header) ||
+		((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
+		r = -EIO;
+
+unlock_and_return:
+	mutex_unlock(&mb1_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_release_usb_wakeup_state - release the state required by a USB wakeup
+ *
+ * This function releases the power state requirements of a USB wakeup.
+ */
+int prcmu_release_usb_wakeup_state(void)
+{
+	int r = 0;
+
+	mutex_lock(&mb1_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
+		cpu_relax();
+
+	writeb(MB1H_RELEASE_USB_WAKEUP,
+		(tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
+
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb1_transfer.work);
+
+	if ((mb1_transfer.ack.header != MB1H_RELEASE_USB_WAKEUP) ||
+		((mb1_transfer.ack.ape_voltage_status & BIT(0)) != 0))
+		r = -EIO;
+
+	mutex_unlock(&mb1_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_set_epod - set the state of a EPOD (power domain)
+ * @epod_id: The EPOD to set
+ * @epod_state: The new EPOD state
+ *
+ * This function sets the state of a EPOD (power domain). It may not be called
+ * from interrupt context.
+ */
+int prcmu_set_epod(u16 epod_id, u8 epod_state)
+{
+	int r = 0;
+	bool ram_retention = false;
+	int i;
+
+	/* check argument */
+	BUG_ON(epod_id >= NUM_EPOD_ID);
+
+	/* set flag if retention is possible */
+	switch (epod_id) {
+	case EPOD_ID_SVAMMDSP:
+	case EPOD_ID_SIAMMDSP:
+	case EPOD_ID_ESRAM12:
+	case EPOD_ID_ESRAM34:
+		ram_retention = true;
+		break;
+	}
+
+	/* check argument */
+	BUG_ON(epod_state > EPOD_STATE_ON);
+	BUG_ON(epod_state == EPOD_STATE_RAMRET && !ram_retention);
+
+	/* get lock */
+	mutex_lock(&mb2_transfer.lock);
+
+	/* wait for mailbox */
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(2))
+		cpu_relax();
+
+	/* fill in mailbox */
+	for (i = 0; i < NUM_EPOD_ID; i++)
+		writeb(EPOD_STATE_NO_CHANGE, (tcdm_base + PRCM_REQ_MB2 + i));
+	writeb(epod_state, (tcdm_base + PRCM_REQ_MB2 + epod_id));
+
+	writeb(MB2H_DPS, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB2));
+
+	writel(MBOX_BIT(2), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	/*
+	 * The current firmware version does not handle errors correctly,
+	 * and we cannot recover if there is an error.
+	 * This is expected to change when the firmware is updated.
+	 */
+	if (!wait_for_completion_timeout(&mb2_transfer.work,
+			msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+		r = -EIO;
+		goto unlock_and_return;
+	}
+
+	if (mb2_transfer.ack.status != HWACC_PWR_ST_OK)
+		r = -EIO;
+
+unlock_and_return:
+	mutex_unlock(&mb2_transfer.lock);
+	return r;
+}
+
+/**
+ * prcmu_configure_auto_pm - Configure autonomous power management.
+ * @sleep: Configuration for ApSleep.
+ * @idle:  Configuration for ApIdle.
+ */
+void prcmu_configure_auto_pm(struct prcmu_auto_pm_config *sleep,
+	struct prcmu_auto_pm_config *idle)
+{
+	u32 sleep_cfg;
+	u32 idle_cfg;
+	unsigned long flags;
+
+	BUG_ON((sleep == NULL) || (idle == NULL));
+
+	sleep_cfg = (sleep->sva_auto_pm_enable & 0xF);
+	sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_auto_pm_enable & 0xF));
+	sleep_cfg = ((sleep_cfg << 8) | (sleep->sva_power_on & 0xFF));
+	sleep_cfg = ((sleep_cfg << 8) | (sleep->sia_power_on & 0xFF));
+	sleep_cfg = ((sleep_cfg << 4) | (sleep->sva_policy & 0xF));
+	sleep_cfg = ((sleep_cfg << 4) | (sleep->sia_policy & 0xF));
+
+	idle_cfg = (idle->sva_auto_pm_enable & 0xF);
+	idle_cfg = ((idle_cfg << 4) | (idle->sia_auto_pm_enable & 0xF));
+	idle_cfg = ((idle_cfg << 8) | (idle->sva_power_on & 0xFF));
+	idle_cfg = ((idle_cfg << 8) | (idle->sia_power_on & 0xFF));
+	idle_cfg = ((idle_cfg << 4) | (idle->sva_policy & 0xF));
+	idle_cfg = ((idle_cfg << 4) | (idle->sia_policy & 0xF));
+
+	spin_lock_irqsave(&mb2_transfer.auto_pm_lock, flags);
+
+	/*
+	 * The autonomous power management configuration is done through
+	 * fields in mailbox 2, but these fields are only used as shared
+	 * variables - i.e. there is no need to send a message.
+	 */
+	writel(sleep_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_SLEEP));
+	writel(idle_cfg, (tcdm_base + PRCM_REQ_MB2_AUTO_PM_IDLE));
+
+	mb2_transfer.auto_pm_enabled =
+		((sleep->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
+		 (sleep->sia_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
+		 (idle->sva_auto_pm_enable == PRCMU_AUTO_PM_ON) ||
+		 (idle->sia_auto_pm_enable == PRCMU_AUTO_PM_ON));
+
+	spin_unlock_irqrestore(&mb2_transfer.auto_pm_lock, flags);
+}
+EXPORT_SYMBOL(prcmu_configure_auto_pm);
+
+bool prcmu_is_auto_pm_enabled(void)
+{
+	return mb2_transfer.auto_pm_enabled;
+}
+
+static int request_sysclk(bool enable)
+{
+	int r;
+	unsigned long flags;
+
+	r = 0;
+
+	mutex_lock(&mb3_transfer.sysclk_lock);
+
+	spin_lock_irqsave(&mb3_transfer.lock, flags);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(3))
+		cpu_relax();
+
+	writeb((enable ? ON : OFF), (tcdm_base + PRCM_REQ_MB3_SYSCLK_MGT));
+
+	writeb(MB3H_SYSCLK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB3));
+	writel(MBOX_BIT(3), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	spin_unlock_irqrestore(&mb3_transfer.lock, flags);
+
+	/*
+	 * The firmware only sends an ACK if we want to enable the
+	 * SysClk, and it succeeds.
+	 */
+	if (enable && !wait_for_completion_timeout(&mb3_transfer.sysclk_work,
+			msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+		r = -EIO;
+	}
+
+	mutex_unlock(&mb3_transfer.sysclk_lock);
+
+	return r;
+}
+
+static int request_timclk(bool enable)
+{
+	u32 val = (PRCM_TCR_DOZE_MODE | PRCM_TCR_TENSEL_MASK);
+
+	if (!enable)
+		val |= PRCM_TCR_STOP_TIMERS;
+	writel(val, (_PRCMU_BASE + PRCM_TCR));
+
+	return 0;
+}
+
+static int request_reg_clock(u8 clock, bool enable)
+{
+	u32 val;
+	unsigned long flags;
+
+	spin_lock_irqsave(&clk_mgt_lock, flags);
+
+	/* Grab the HW semaphore. */
+	while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
+		cpu_relax();
+
+	val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
+	if (enable) {
+		val |= (PRCM_CLK_MGT_CLKEN | clk_mgt[clock].pllsw);
+	} else {
+		clk_mgt[clock].pllsw = (val & PRCM_CLK_MGT_CLKPLLSW_MASK);
+		val &= ~(PRCM_CLK_MGT_CLKEN | PRCM_CLK_MGT_CLKPLLSW_MASK);
+	}
+	writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
+
+	/* Release the HW semaphore. */
+	writel(0, (_PRCMU_BASE + PRCM_SEM));
+
+	spin_unlock_irqrestore(&clk_mgt_lock, flags);
+
+	return 0;
+}
+
+/**
+ * prcmu_request_clock() - Request for a clock to be enabled or disabled.
+ * @clock:      The clock for which the request is made.
+ * @enable:     Whether the clock should be enabled (true) or disabled (false).
+ *
+ * This function should only be used by the clock implementation.
+ * Do not use it from any other place!
+ */
+int prcmu_request_clock(u8 clock, bool enable)
+{
+	if (clock < PRCMU_NUM_REG_CLOCKS)
+		return request_reg_clock(clock, enable);
+	else if (clock == PRCMU_TIMCLK)
+		return request_timclk(enable);
+	else if (clock == PRCMU_SYSCLK)
+		return request_sysclk(enable);
+	else
+		return -EINVAL;
+}
+
+int prcmu_config_esram0_deep_sleep(u8 state)
+{
+	if ((state > ESRAM0_DEEP_SLEEP_STATE_RET) ||
+	    (state < ESRAM0_DEEP_SLEEP_STATE_OFF))
+		return -EINVAL;
+
+	mutex_lock(&mb4_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
+		cpu_relax();
+
+	writeb(MB4H_MEM_ST, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
+	writeb(((DDR_PWR_STATE_OFFHIGHLAT << 4) | DDR_PWR_STATE_ON),
+	       (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_SLEEP_IDLE));
+	writeb(DDR_PWR_STATE_ON,
+	       (tcdm_base + PRCM_REQ_MB4_DDR_ST_AP_DEEP_IDLE));
+	writeb(state, (tcdm_base + PRCM_REQ_MB4_ESRAM0_ST));
+
+	writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb4_transfer.work);
+
+	mutex_unlock(&mb4_transfer.lock);
+
+	return 0;
+}
+
+int prcmu_config_hotdog(u8 threshold)
+{
+	mutex_lock(&mb4_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
+		cpu_relax();
+
+	writeb(threshold, (tcdm_base + PRCM_REQ_MB4_HOTDOG_THRESHOLD));
+	writeb(MB4H_HOTDOG, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
+
+	writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb4_transfer.work);
+
+	mutex_unlock(&mb4_transfer.lock);
+
+	return 0;
+}
+
+int prcmu_config_hotmon(u8 low, u8 high)
+{
+	mutex_lock(&mb4_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
+		cpu_relax();
+
+	writeb(low, (tcdm_base + PRCM_REQ_MB4_HOTMON_LOW));
+	writeb(high, (tcdm_base + PRCM_REQ_MB4_HOTMON_HIGH));
+	writeb((HOTMON_CONFIG_LOW | HOTMON_CONFIG_HIGH),
+		(tcdm_base + PRCM_REQ_MB4_HOTMON_CONFIG));
+	writeb(MB4H_HOTMON, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
+
+	writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb4_transfer.work);
+
+	mutex_unlock(&mb4_transfer.lock);
+
+	return 0;
+}
+
+static int config_hot_period(u16 val)
+{
+	mutex_lock(&mb4_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(4))
+		cpu_relax();
+
+	writew(val, (tcdm_base + PRCM_REQ_MB4_HOT_PERIOD));
+	writeb(MB4H_HOT_PERIOD, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB4));
+
+	writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb4_transfer.work);
+
+	mutex_unlock(&mb4_transfer.lock);
+
+	return 0;
+}
+
+int prcmu_start_temp_sense(u16 cycles32k)
+{
+	if (cycles32k == 0xFFFF)
+		return -EINVAL;
+
+	return config_hot_period(cycles32k);
+}
+
+int prcmu_stop_temp_sense(void)
+{
+	return config_hot_period(0xFFFF);
+}
+
+/**
+ * prcmu_set_clock_divider() - Configure the clock divider.
+ * @clock:	The clock for which the request is made.
+ * @divider:	The clock divider. (< 32)
+ *
+ * This function should only be used by the clock implementation.
+ * Do not use it from any other place!
+ */
+int prcmu_set_clock_divider(u8 clock, u8 divider)
+{
+	u32 val;
+	unsigned long flags;
+
+	if ((clock >= PRCMU_NUM_REG_CLOCKS) || (divider < 1) || (31 < divider))
+		return -EINVAL;
+
+	spin_lock_irqsave(&clk_mgt_lock, flags);
+
+	/* Grab the HW semaphore. */
+	while ((readl(_PRCMU_BASE + PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
+		cpu_relax();
+
+	val = readl(_PRCMU_BASE + clk_mgt[clock].offset);
+	val &= ~(PRCM_CLK_MGT_CLKPLLDIV_MASK);
+	val |= (u32)divider;
+	writel(val, (_PRCMU_BASE + clk_mgt[clock].offset));
+
+	/* Release the HW semaphore. */
+	writel(0, (_PRCMU_BASE + PRCM_SEM));
+
+	spin_unlock_irqrestore(&clk_mgt_lock, flags);
+
+	return 0;
+}
+
+/**
+ * prcmu_abb_read() - Read register value(s) from the ABB.
+ * @slave:	The I2C slave address.
+ * @reg:	The (start) register address.
+ * @value:	The read out value(s).
+ * @size:	The number of registers to read.
+ *
+ * Reads register value(s) from the ABB.
+ * @size has to be 1 for the current firmware version.
+ */
+int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
+{
+	int r;
+
+	if (size != 1)
+		return -EINVAL;
+
+	mutex_lock(&mb5_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
+		cpu_relax();
+
+	writeb(PRCMU_I2C_READ(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
+	writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
+	writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
+	writeb(0, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
+
+	writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	if (!wait_for_completion_timeout(&mb5_transfer.work,
+				msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+		r = -EIO;
+	} else {
+		r = ((mb5_transfer.ack.status == I2C_RD_OK) ? 0 : -EIO);
+	}
+
+	if (!r)
+		*value = mb5_transfer.ack.value;
+
+	mutex_unlock(&mb5_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_abb_write() - Write register value(s) to the ABB.
+ * @slave:	The I2C slave address.
+ * @reg:	The (start) register address.
+ * @value:	The value(s) to write.
+ * @size:	The number of registers to write.
+ *
+ * Reads register value(s) from the ABB.
+ * @size has to be 1 for the current firmware version.
+ */
+int prcmu_abb_write(u8 slave, u8 reg, u8 *value, u8 size)
+{
+	int r;
+
+	if (size != 1)
+		return -EINVAL;
+
+	mutex_lock(&mb5_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(5))
+		cpu_relax();
+
+	writeb(PRCMU_I2C_WRITE(slave), (tcdm_base + PRCM_REQ_MB5_I2C_SLAVE_OP));
+	writeb(PRCMU_I2C_STOP_EN, (tcdm_base + PRCM_REQ_MB5_I2C_HW_BITS));
+	writeb(reg, (tcdm_base + PRCM_REQ_MB5_I2C_REG));
+	writeb(*value, (tcdm_base + PRCM_REQ_MB5_I2C_VAL));
+
+	writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	if (!wait_for_completion_timeout(&mb5_transfer.work,
+				msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+		r = -EIO;
+	} else {
+		r = ((mb5_transfer.ack.status == I2C_WR_OK) ? 0 : -EIO);
+	}
+
+	mutex_unlock(&mb5_transfer.lock);
+
+	return r;
+}
+
+/**
+ * prcmu_ac_wake_req - should be called whenever ARM wants to wakeup Modem
+ */
+void prcmu_ac_wake_req(void)
+{
+	u32 val;
+
+	mutex_lock(&mb0_transfer.ac_wake_lock);
+
+	val = readl(_PRCMU_BASE + PRCM_HOSTACCESS_REQ);
+	if (val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ)
+		goto unlock_and_return;
+
+	atomic_set(&ac_wake_req_state, 1);
+
+	writel((val | PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ),
+		(_PRCMU_BASE + PRCM_HOSTACCESS_REQ));
+
+	if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
+			msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+	}
+
+unlock_and_return:
+	mutex_unlock(&mb0_transfer.ac_wake_lock);
+}
+
+/**
+ * prcmu_ac_sleep_req - called when ARM no longer needs to talk to modem
+ */
+void prcmu_ac_sleep_req()
+{
+	u32 val;
+
+	mutex_lock(&mb0_transfer.ac_wake_lock);
+
+	val = readl(_PRCMU_BASE + PRCM_HOSTACCESS_REQ);
+	if (!(val & PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ))
+		goto unlock_and_return;
+
+	writel((val & ~PRCM_HOSTACCESS_REQ_HOSTACCESS_REQ),
+		(_PRCMU_BASE + PRCM_HOSTACCESS_REQ));
+
+	if (!wait_for_completion_timeout(&mb0_transfer.ac_wake_work,
+			msecs_to_jiffies(20000))) {
+		pr_err("prcmu: %s timed out (20 s) waiting for a reply.\n",
+			__func__);
+	}
+
+	atomic_set(&ac_wake_req_state, 0);
+
+unlock_and_return:
+	mutex_unlock(&mb0_transfer.ac_wake_lock);
+}
+
+bool prcmu_is_ac_wake_requested(void)
+{
+	return (atomic_read(&ac_wake_req_state) != 0);
+}
+
+/**
+ * prcmu_system_reset - System reset
+ *
+ * Saves the reset reason code and then sets the APE_SOFRST register which
+ * fires interrupt to fw
+ */
+void prcmu_system_reset(u16 reset_code)
+{
+	writew(reset_code, (tcdm_base + PRCM_SW_RST_REASON));
+	writel(1, (_PRCMU_BASE + PRCM_APE_SOFTRST));
+}
+
+/**
+ * prcmu_reset_modem - ask the PRCMU to reset modem
+ */
+void prcmu_modem_reset(void)
+{
+	mutex_lock(&mb1_transfer.lock);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(1))
+		cpu_relax();
+
+	writeb(MB1H_RESET_MODEM, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB1));
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+	wait_for_completion(&mb1_transfer.work);
+
+	/*
+	 * No need to check return from PRCMU as modem should go in reset state
+	 * This state is already managed by upper layer
+	 */
+
+	mutex_unlock(&mb1_transfer.lock);
+}
+
+static void ack_dbb_wakeup(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	while (readl(_PRCMU_BASE + PRCM_MBOX_CPU_VAL) & MBOX_BIT(0))
+		cpu_relax();
+
+	writeb(MB0H_READ_WAKEUP_ACK, (tcdm_base + PRCM_MBOX_HEADER_REQ_MB0));
+	writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_MBOX_CPU_SET));
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+}
+
+static inline void print_unknown_header_warning(u8 n, u8 header)
+{
+	pr_warning("prcmu: Unknown message header (%d) in mailbox %d.\n",
+		header, n);
+}
+
+static bool read_mailbox_0(void)
+{
+	bool r;
+	u32 ev;
+	unsigned int n;
+	u8 header;
+
+	header = readb(tcdm_base + PRCM_MBOX_HEADER_ACK_MB0);
+	switch (header) {
+	case MB0H_WAKEUP_EXE:
+	case MB0H_WAKEUP_SLEEP:
+		if (readb(tcdm_base + PRCM_ACK_MB0_READ_POINTER) & 1)
+			ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_1_8500);
+		else
+			ev = readl(tcdm_base + PRCM_ACK_MB0_WAKEUP_0_8500);
+
+		if (ev & (WAKEUP_BIT_AC_WAKE_ACK | WAKEUP_BIT_AC_SLEEP_ACK))
+			complete(&mb0_transfer.ac_wake_work);
+		if (ev & WAKEUP_BIT_SYSCLK_OK)
+			complete(&mb3_transfer.sysclk_work);
+
+		ev &= mb0_transfer.req.dbb_irqs;
+
+		for (n = 0; n < NUM_PRCMU_WAKEUPS; n++) {
+			if (ev & prcmu_irq_bit[n])
+				generic_handle_irq(IRQ_PRCMU_BASE + n);
+		}
+		r = true;
+		break;
+	default:
+		print_unknown_header_warning(0, header);
+		r = false;
+		break;
+	}
+	writel(MBOX_BIT(0), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	return r;
+}
+
+static bool read_mailbox_1(void)
+{
+	mb1_transfer.ack.header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB1);
+	mb1_transfer.ack.arm_opp = readb(tcdm_base +
+		PRCM_ACK_MB1_CURRENT_ARM_OPP);
+	mb1_transfer.ack.ape_opp = readb(tcdm_base +
+		PRCM_ACK_MB1_CURRENT_APE_OPP);
+	mb1_transfer.ack.ape_voltage_status = readb(tcdm_base +
+		PRCM_ACK_MB1_APE_VOLTAGE_STATUS);
+	writel(MBOX_BIT(1), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	complete(&mb1_transfer.work);
+	return false;
+}
+
+static bool read_mailbox_2(void)
+{
+	mb2_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB2_DPS_STATUS);
+	writel(MBOX_BIT(2), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	complete(&mb2_transfer.work);
+	return false;
+}
+
+static bool read_mailbox_3(void)
+{
+	writel(MBOX_BIT(3), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	return false;
+}
+
+static bool read_mailbox_4(void)
+{
+	u8 header;
+	bool do_complete = true;
+
+	header = readb(tcdm_base + PRCM_MBOX_HEADER_REQ_MB4);
+	switch (header) {
+	case MB4H_MEM_ST:
+	case MB4H_HOTDOG:
+	case MB4H_HOTMON:
+	case MB4H_HOT_PERIOD:
+		break;
+	default:
+		print_unknown_header_warning(4, header);
+		do_complete = false;
+		break;
+	}
+
+	writel(MBOX_BIT(4), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+
+	if (do_complete)
+		complete(&mb4_transfer.work);
+
+	return false;
+}
+
+static bool read_mailbox_5(void)
+{
+	mb5_transfer.ack.status = readb(tcdm_base + PRCM_ACK_MB5_I2C_STATUS);
+	mb5_transfer.ack.value = readb(tcdm_base + PRCM_ACK_MB5_I2C_VAL);
+	writel(MBOX_BIT(5), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	complete(&mb5_transfer.work);
+	return false;
+}
+
+static bool read_mailbox_6(void)
+{
+	writel(MBOX_BIT(6), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	return false;
+}
+
+static bool read_mailbox_7(void)
+{
+	writel(MBOX_BIT(7), (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+	return false;
+}
+
+static bool (* const read_mailbox[NUM_MB])(void) = {
+	read_mailbox_0,
+	read_mailbox_1,
+	read_mailbox_2,
+	read_mailbox_3,
+	read_mailbox_4,
+	read_mailbox_5,
+	read_mailbox_6,
+	read_mailbox_7
+};
+
+static irqreturn_t prcmu_irq_handler(int irq, void *data)
+{
+	u32 bits;
+	u8 n;
+	irqreturn_t r;
+
+	bits = (readl(_PRCMU_BASE + PRCM_ARM_IT1_VAL) & ALL_MBOX_BITS);
+	if (unlikely(!bits))
+		return IRQ_NONE;
+
+	r = IRQ_HANDLED;
+	for (n = 0; bits; n++) {
+		if (bits & MBOX_BIT(n)) {
+			bits -= MBOX_BIT(n);
+			if (read_mailbox[n]())
+				r = IRQ_WAKE_THREAD;
+		}
+	}
+	return r;
+}
+
+static irqreturn_t prcmu_irq_thread_fn(int irq, void *data)
+{
+	ack_dbb_wakeup();
+	return IRQ_HANDLED;
+}
+
+static void prcmu_mask_work(struct work_struct *work)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.lock, flags);
+
+	config_wakeups();
+
+	spin_unlock_irqrestore(&mb0_transfer.lock, flags);
+}
+
+static void prcmu_irq_mask(struct irq_data *d)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
+
+	mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
+
+	spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
+
+	if (d->irq != IRQ_PRCMU_CA_SLEEP)
+		schedule_work(&mb0_transfer.mask_work);
+}
+
+static void prcmu_irq_unmask(struct irq_data *d)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
+
+	mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
+
+	spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
+
+	if (d->irq != IRQ_PRCMU_CA_SLEEP)
+		schedule_work(&mb0_transfer.mask_work);
+}
+
+static void noop(struct irq_data *d)
+{
+}
+
+static struct irq_chip prcmu_irq_chip = {
+	.name		= "prcmu",
+	.irq_disable	= prcmu_irq_mask,
+	.irq_ack	= noop,
+	.irq_mask	= prcmu_irq_mask,
+	.irq_unmask	= prcmu_irq_unmask,
+};
+
+void __init prcmu_early_init(void)
+{
+	unsigned int i;
+
+	if (cpu_is_u8500v1()) {
+		tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE_V1);
+	} else if (cpu_is_u8500v2()) {
+		void *tcpm_base = ioremap_nocache(U8500_PRCMU_TCPM_BASE, SZ_4K);
+
+		if (tcpm_base != NULL) {
+			int version;
+			version = readl(tcpm_base + PRCMU_FW_VERSION_OFFSET);
+			prcmu_version.project_number = version & 0xFF;
+			prcmu_version.api_version = (version >> 8) & 0xFF;
+			prcmu_version.func_version = (version >> 16) & 0xFF;
+			prcmu_version.errata = (version >> 24) & 0xFF;
+			pr_info("PRCMU firmware version %d.%d.%d\n",
+				(version >> 8) & 0xFF, (version >> 16) & 0xFF,
+				(version >> 24) & 0xFF);
+			iounmap(tcpm_base);
+		}
+
+		tcdm_base = __io_address(U8500_PRCMU_TCDM_BASE);
+	} else {
+		pr_err("prcmu: Unsupported chip version\n");
+		BUG();
+	}
+
+	spin_lock_init(&mb0_transfer.lock);
+	spin_lock_init(&mb0_transfer.dbb_irqs_lock);
+	mutex_init(&mb0_transfer.ac_wake_lock);
+	init_completion(&mb0_transfer.ac_wake_work);
+	mutex_init(&mb1_transfer.lock);
+	init_completion(&mb1_transfer.work);
+	mutex_init(&mb2_transfer.lock);
+	init_completion(&mb2_transfer.work);
+	spin_lock_init(&mb2_transfer.auto_pm_lock);
+	spin_lock_init(&mb3_transfer.lock);
+	mutex_init(&mb3_transfer.sysclk_lock);
+	init_completion(&mb3_transfer.sysclk_work);
+	mutex_init(&mb4_transfer.lock);
+	init_completion(&mb4_transfer.work);
+	mutex_init(&mb5_transfer.lock);
+	init_completion(&mb5_transfer.work);
+
+	INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work);
+
+	/* Initalize irqs. */
+	for (i = 0; i < NUM_PRCMU_WAKEUPS; i++) {
+		unsigned int irq;
+
+		irq = IRQ_PRCMU_BASE + i;
+		irq_set_chip_and_handler(irq, &prcmu_irq_chip,
+					 handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+}
+
+/*
+ * Power domain switches (ePODs) modeled as regulators for the DB8500 SoC
+ */
+static struct regulator_consumer_supply db8500_vape_consumers[] = {
+	REGULATOR_SUPPLY("v-ape", NULL),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.0"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.1"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.2"),
+	REGULATOR_SUPPLY("v-i2c", "nmk-i2c.3"),
+	/* "v-mmc" changed to "vcore" in the mainline kernel */
+	REGULATOR_SUPPLY("vcore", "sdi0"),
+	REGULATOR_SUPPLY("vcore", "sdi1"),
+	REGULATOR_SUPPLY("vcore", "sdi2"),
+	REGULATOR_SUPPLY("vcore", "sdi3"),
+	REGULATOR_SUPPLY("vcore", "sdi4"),
+	REGULATOR_SUPPLY("v-dma", "dma40.0"),
+	REGULATOR_SUPPLY("v-ape", "ab8500-usb.0"),
+	/* "v-uart" changed to "vcore" in the mainline kernel */
+	REGULATOR_SUPPLY("vcore", "uart0"),
+	REGULATOR_SUPPLY("vcore", "uart1"),
+	REGULATOR_SUPPLY("vcore", "uart2"),
+	REGULATOR_SUPPLY("v-ape", "nmk-ske-keypad.0"),
+};
+
+static struct regulator_consumer_supply db8500_vsmps2_consumers[] = {
+	/* CG2900 and CW1200 power to off-chip peripherals */
+	REGULATOR_SUPPLY("gbf_1v8", "cg2900-uart.0"),
+	REGULATOR_SUPPLY("wlan_1v8", "cw1200.0"),
+	REGULATOR_SUPPLY("musb_1v8", "ab8500-usb.0"),
+	/* AV8100 regulator */
+	REGULATOR_SUPPLY("hdmi_1v8", "0-0070"),
+};
+
+static struct regulator_consumer_supply db8500_b2r2_mcde_consumers[] = {
+	REGULATOR_SUPPLY("vsupply", "b2r2.0"),
+	REGULATOR_SUPPLY("vsupply", "mcde.0"),
+};
+
+static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
+	[DB8500_REGULATOR_VAPE] = {
+		.constraints = {
+			.name = "db8500-vape",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_vape_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers),
+	},
+	[DB8500_REGULATOR_VARM] = {
+		.constraints = {
+			.name = "db8500-varm",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VMODEM] = {
+		.constraints = {
+			.name = "db8500-vmodem",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VPLL] = {
+		.constraints = {
+			.name = "db8500-vpll",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS1] = {
+		.constraints = {
+			.name = "db8500-vsmps1",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS2] = {
+		.constraints = {
+			.name = "db8500-vsmps2",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_vsmps2_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_vsmps2_consumers),
+	},
+	[DB8500_REGULATOR_VSMPS3] = {
+		.constraints = {
+			.name = "db8500-vsmps3",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_VRF1] = {
+		.constraints = {
+			.name = "db8500-vrf1",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sva-mmdsp",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
+		.constraints = {
+			/* "ret" means "retention" */
+			.name = "db8500-sva-mmdsp-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAPIPE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sva-pipe",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sia-mmdsp",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
+		.constraints = {
+			.name = "db8500-sia-mmdsp-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SIAPIPE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sia-pipe",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SGA] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-sga",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-b2r2-mcde",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+		.consumer_supplies = db8500_b2r2_mcde_consumers,
+		.num_consumer_supplies = ARRAY_SIZE(db8500_b2r2_mcde_consumers),
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-esram12",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
+		.constraints = {
+			.name = "db8500-esram12-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34] = {
+		.supply_regulator = "db8500-vape",
+		.constraints = {
+			.name = "db8500-esram34",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
+		.constraints = {
+			.name = "db8500-esram34-ret",
+			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
+		},
+	},
+};
+
+static struct mfd_cell db8500_prcmu_devs[] = {
+	{
+		.name = "db8500-prcmu-regulators",
+		.mfd_data = &db8500_regulators,
+	},
+	{
+		.name = "cpufreq-u8500",
+	},
+};
+
+/**
+ * prcmu_fw_init - arch init call for the Linux PRCMU fw init logic
+ *
+ */
+static int __init db8500_prcmu_probe(struct platform_device *pdev)
+{
+	int err = 0;
+
+	if (ux500_is_svp())
+		return -ENODEV;
+
+	/* Clean up the mailbox interrupts after pre-kernel code. */
+	writel(ALL_MBOX_BITS, (_PRCMU_BASE + PRCM_ARM_IT1_CLR));
+
+	err = request_threaded_irq(IRQ_DB8500_PRCMU1, prcmu_irq_handler,
+		prcmu_irq_thread_fn, IRQF_NO_SUSPEND, "prcmu", NULL);
+	if (err < 0) {
+		pr_err("prcmu: Failed to allocate IRQ_DB8500_PRCMU1.\n");
+		err = -EBUSY;
+		goto no_irq_return;
+	}
+
+	if (cpu_is_u8500v20_or_later())
+		prcmu_config_esram0_deep_sleep(ESRAM0_DEEP_SLEEP_STATE_RET);
+
+	err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
+			      ARRAY_SIZE(db8500_prcmu_devs), NULL,
+			      0);
+
+	if (err)
+		pr_err("prcmu: Failed to add subdevices\n");
+	else
+		pr_info("DB8500 PRCMU initialized\n");
+
+no_irq_return:
+	return err;
+}
+
+static struct platform_driver db8500_prcmu_driver = {
+	.driver = {
+		.name = "db8500-prcmu",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init db8500_prcmu_init(void)
+{
+	return platform_driver_probe(&db8500_prcmu_driver, db8500_prcmu_probe);
+}
+
+arch_initcall(db8500_prcmu_init);
+
+MODULE_AUTHOR("Mattias Nilsson <mattias.i.nilsson@stericsson.com>");
+MODULE_DESCRIPTION("DB8500 PRCM Unit driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index b9f29e0d4295..f0b13a0d1851 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -274,6 +274,13 @@ config REGULATOR_AB8500
 	  This driver supports the regulators found on the ST-Ericsson mixed
 	  signal AB8500 PMIC
 
+config REGULATOR_DB8500_PRCMU
+	bool "ST-Ericsson DB8500 Voltage Domain Regulators"
+	depends on MFD_DB8500_PRCMU
+	help
+	  This driver supports the voltage domain regulators controlled by the
+	  DB8500 PRCMU
+
 config REGULATOR_TPS6586X
 	tristate "TI TPS6586X Power regulators"
 	depends on MFD_TPS6586X
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index d72a42756778..165ff5371e9e 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -41,5 +41,6 @@ obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
 obj-$(CONFIG_REGULATOR_AB8500)	+= ab8500.o
+obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/db8500-prcmu.c b/drivers/regulator/db8500-prcmu.c
new file mode 100644
index 000000000000..1089a961616e
--- /dev/null
+++ b/drivers/regulator/db8500-prcmu.c
@@ -0,0 +1,558 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
+ *          Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
+ *
+ * Power domain regulators on DB8500
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/db8500-prcmu.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/db8500-prcmu.h>
+
+/*
+ * power state reference count
+ */
+static int power_state_active_cnt; /* will initialize to zero */
+static DEFINE_SPINLOCK(power_state_active_lock);
+
+static void power_state_active_enable(void)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&power_state_active_lock, flags);
+	power_state_active_cnt++;
+	spin_unlock_irqrestore(&power_state_active_lock, flags);
+}
+
+static int power_state_active_disable(void)
+{
+	int ret = 0;
+	unsigned long flags;
+
+	spin_lock_irqsave(&power_state_active_lock, flags);
+	if (power_state_active_cnt <= 0) {
+		pr_err("power state: unbalanced enable/disable calls\n");
+		ret = -EINVAL;
+		goto out;
+	}
+
+	power_state_active_cnt--;
+out:
+	spin_unlock_irqrestore(&power_state_active_lock, flags);
+	return ret;
+}
+
+/*
+ * Exported interface for CPUIdle only. This function is called when interrupts
+ * are turned off. Hence, no locking.
+ */
+int power_state_active_is_enabled(void)
+{
+	return (power_state_active_cnt > 0);
+}
+
+/**
+ * struct db8500_regulator_info - db8500 regulator information
+ * @dev: device pointer
+ * @desc: regulator description
+ * @rdev: regulator device pointer
+ * @is_enabled: status of the regulator
+ * @epod_id: id for EPOD (power domain)
+ * @is_ramret: RAM retention switch for EPOD (power domain)
+ * @operating_point: operating point (only for vape, to be removed)
+ *
+ */
+struct db8500_regulator_info {
+	struct device *dev;
+	struct regulator_desc desc;
+	struct regulator_dev *rdev;
+	bool is_enabled;
+	u16 epod_id;
+	bool is_ramret;
+	bool exclude_from_power_state;
+	unsigned int operating_point;
+};
+
+static int db8500_regulator_enable(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev), "regulator-%s-enable\n",
+		info->desc.name);
+
+	info->is_enabled = true;
+	if (!info->exclude_from_power_state)
+		power_state_active_enable();
+
+	return 0;
+}
+
+static int db8500_regulator_disable(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+	int ret = 0;
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev), "regulator-%s-disable\n",
+		info->desc.name);
+
+	info->is_enabled = false;
+	if (!info->exclude_from_power_state)
+		ret = power_state_active_disable();
+
+	return ret;
+}
+
+static int db8500_regulator_is_enabled(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev), "regulator-%s-is_enabled (is_enabled):"
+		" %i\n", info->desc.name, info->is_enabled);
+
+	return info->is_enabled;
+}
+
+/* db8500 regulator operations */
+static struct regulator_ops db8500_regulator_ops = {
+	.enable			= db8500_regulator_enable,
+	.disable		= db8500_regulator_disable,
+	.is_enabled		= db8500_regulator_is_enabled,
+};
+
+/*
+ * EPOD control
+ */
+static bool epod_on[NUM_EPOD_ID];
+static bool epod_ramret[NUM_EPOD_ID];
+
+static int enable_epod(u16 epod_id, bool ramret)
+{
+	int ret;
+
+	if (ramret) {
+		if (!epod_on[epod_id]) {
+			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
+			if (ret < 0)
+				return ret;
+		}
+		epod_ramret[epod_id] = true;
+	} else {
+		ret = prcmu_set_epod(epod_id, EPOD_STATE_ON);
+		if (ret < 0)
+			return ret;
+		epod_on[epod_id] = true;
+	}
+
+	return 0;
+}
+
+static int disable_epod(u16 epod_id, bool ramret)
+{
+	int ret;
+
+	if (ramret) {
+		if (!epod_on[epod_id]) {
+			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
+			if (ret < 0)
+				return ret;
+		}
+		epod_ramret[epod_id] = false;
+	} else {
+		if (epod_ramret[epod_id]) {
+			ret = prcmu_set_epod(epod_id, EPOD_STATE_RAMRET);
+			if (ret < 0)
+				return ret;
+		} else {
+			ret = prcmu_set_epod(epod_id, EPOD_STATE_OFF);
+			if (ret < 0)
+				return ret;
+		}
+		epod_on[epod_id] = false;
+	}
+
+	return 0;
+}
+
+/*
+ * Regulator switch
+ */
+static int db8500_regulator_switch_enable(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+	int ret;
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-enable\n",
+		info->desc.name);
+
+	ret = enable_epod(info->epod_id, info->is_ramret);
+	if (ret < 0) {
+		dev_err(rdev_get_dev(rdev),
+			"regulator-switch-%s-enable: prcmu call failed\n",
+			info->desc.name);
+		goto out;
+	}
+
+	info->is_enabled = true;
+out:
+	return ret;
+}
+
+static int db8500_regulator_switch_disable(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+	int ret;
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev), "regulator-switch-%s-disable\n",
+		info->desc.name);
+
+	ret = disable_epod(info->epod_id, info->is_ramret);
+	if (ret < 0) {
+		dev_err(rdev_get_dev(rdev),
+			"regulator_switch-%s-disable: prcmu call failed\n",
+			info->desc.name);
+		goto out;
+	}
+
+	info->is_enabled = 0;
+out:
+	return ret;
+}
+
+static int db8500_regulator_switch_is_enabled(struct regulator_dev *rdev)
+{
+	struct db8500_regulator_info *info = rdev_get_drvdata(rdev);
+
+	if (info == NULL)
+		return -EINVAL;
+
+	dev_vdbg(rdev_get_dev(rdev),
+		"regulator-switch-%s-is_enabled (is_enabled): %i\n",
+		info->desc.name, info->is_enabled);
+
+	return info->is_enabled;
+}
+
+static struct regulator_ops db8500_regulator_switch_ops = {
+	.enable			= db8500_regulator_switch_enable,
+	.disable		= db8500_regulator_switch_disable,
+	.is_enabled		= db8500_regulator_switch_is_enabled,
+};
+
+/*
+ * Regulator information
+ */
+static struct db8500_regulator_info
+		db8500_regulator_info[DB8500_NUM_REGULATORS] = {
+	[DB8500_REGULATOR_VAPE] = {
+		.desc = {
+			.name	= "db8500-vape",
+			.id	= DB8500_REGULATOR_VAPE,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VARM] = {
+		.desc = {
+			.name	= "db8500-varm",
+			.id	= DB8500_REGULATOR_VARM,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VMODEM] = {
+		.desc = {
+			.name	= "db8500-vmodem",
+			.id	= DB8500_REGULATOR_VMODEM,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VPLL] = {
+		.desc = {
+			.name	= "db8500-vpll",
+			.id	= DB8500_REGULATOR_VPLL,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS1] = {
+		.desc = {
+			.name	= "db8500-vsmps1",
+			.id	= DB8500_REGULATOR_VSMPS1,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VSMPS2] = {
+		.desc = {
+			.name	= "db8500-vsmps2",
+			.id	= DB8500_REGULATOR_VSMPS2,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.exclude_from_power_state = true,
+	},
+	[DB8500_REGULATOR_VSMPS3] = {
+		.desc = {
+			.name	= "db8500-vsmps3",
+			.id	= DB8500_REGULATOR_VSMPS3,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_VRF1] = {
+		.desc = {
+			.name	= "db8500-vrf1",
+			.id	= DB8500_REGULATOR_VRF1,
+			.ops	= &db8500_regulator_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSP] = {
+		.desc = {
+			.name	= "db8500-sva-mmdsp",
+			.id	= DB8500_REGULATOR_SWITCH_SVAMMDSP,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SVAMMDSP,
+	},
+	[DB8500_REGULATOR_SWITCH_SVAMMDSPRET] = {
+		.desc = {
+			.name	= "db8500-sva-mmdsp-ret",
+			.id	= DB8500_REGULATOR_SWITCH_SVAMMDSPRET,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SVAMMDSP,
+		.is_ramret = true,
+	},
+	[DB8500_REGULATOR_SWITCH_SVAPIPE] = {
+		.desc = {
+			.name	= "db8500-sva-pipe",
+			.id	= DB8500_REGULATOR_SWITCH_SVAPIPE,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SVAPIPE,
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSP] = {
+		.desc = {
+			.name	= "db8500-sia-mmdsp",
+			.id	= DB8500_REGULATOR_SWITCH_SIAMMDSP,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SIAMMDSP,
+	},
+	[DB8500_REGULATOR_SWITCH_SIAMMDSPRET] = {
+		.desc = {
+			.name	= "db8500-sia-mmdsp-ret",
+			.id	= DB8500_REGULATOR_SWITCH_SIAMMDSPRET,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SIAMMDSP,
+		.is_ramret = true,
+	},
+	[DB8500_REGULATOR_SWITCH_SIAPIPE] = {
+		.desc = {
+			.name	= "db8500-sia-pipe",
+			.id	= DB8500_REGULATOR_SWITCH_SIAPIPE,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SIAPIPE,
+	},
+	[DB8500_REGULATOR_SWITCH_SGA] = {
+		.desc = {
+			.name	= "db8500-sga",
+			.id	= DB8500_REGULATOR_SWITCH_SGA,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_SGA,
+	},
+	[DB8500_REGULATOR_SWITCH_B2R2_MCDE] = {
+		.desc = {
+			.name	= "db8500-b2r2-mcde",
+			.id	= DB8500_REGULATOR_SWITCH_B2R2_MCDE,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_B2R2_MCDE,
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12] = {
+		.desc = {
+			.name	= "db8500-esram12",
+			.id	= DB8500_REGULATOR_SWITCH_ESRAM12,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id	= EPOD_ID_ESRAM12,
+		.is_enabled	= true,
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM12RET] = {
+		.desc = {
+			.name	= "db8500-esram12-ret",
+			.id	= DB8500_REGULATOR_SWITCH_ESRAM12RET,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_ESRAM12,
+		.is_ramret = true,
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34] = {
+		.desc = {
+			.name	= "db8500-esram34",
+			.id	= DB8500_REGULATOR_SWITCH_ESRAM34,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id	= EPOD_ID_ESRAM34,
+		.is_enabled	= true,
+	},
+	[DB8500_REGULATOR_SWITCH_ESRAM34RET] = {
+		.desc = {
+			.name	= "db8500-esram34-ret",
+			.id	= DB8500_REGULATOR_SWITCH_ESRAM34RET,
+			.ops	= &db8500_regulator_switch_ops,
+			.type	= REGULATOR_VOLTAGE,
+			.owner	= THIS_MODULE,
+		},
+		.epod_id = EPOD_ID_ESRAM34,
+		.is_ramret = true,
+	},
+};
+
+static int __devinit db8500_regulator_probe(struct platform_device *pdev)
+{
+	struct regulator_init_data *db8500_init_data = mfd_get_data(pdev);
+	int i, err;
+
+	/* register all regulators */
+	for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) {
+		struct db8500_regulator_info *info;
+		struct regulator_init_data *init_data = &db8500_init_data[i];
+
+		/* assign per-regulator data */
+		info = &db8500_regulator_info[i];
+		info->dev = &pdev->dev;
+
+		/* register with the regulator framework */
+		info->rdev = regulator_register(&info->desc, &pdev->dev,
+				init_data, info);
+		if (IS_ERR(info->rdev)) {
+			err = PTR_ERR(info->rdev);
+			dev_err(&pdev->dev, "failed to register %s: err %i\n",
+				info->desc.name, err);
+
+			/* if failing, unregister all earlier regulators */
+			i--;
+			while (i >= 0) {
+				info = &db8500_regulator_info[i];
+				regulator_unregister(info->rdev);
+				i--;
+			}
+			return err;
+		}
+
+		dev_dbg(rdev_get_dev(info->rdev),
+			"regulator-%s-probed\n", info->desc.name);
+	}
+
+	return 0;
+}
+
+static int __exit db8500_regulator_remove(struct platform_device *pdev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(db8500_regulator_info); i++) {
+		struct db8500_regulator_info *info;
+		info = &db8500_regulator_info[i];
+
+		dev_vdbg(rdev_get_dev(info->rdev),
+			"regulator-%s-remove\n", info->desc.name);
+
+		regulator_unregister(info->rdev);
+	}
+
+	return 0;
+}
+
+static struct platform_driver db8500_regulator_driver = {
+	.driver = {
+		.name = "db8500-prcmu-regulators",
+		.owner = THIS_MODULE,
+	},
+	.probe = db8500_regulator_probe,
+	.remove = __exit_p(db8500_regulator_remove),
+};
+
+static int __init db8500_regulator_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&db8500_regulator_driver);
+	if (ret < 0)
+		return -ENODEV;
+
+	return 0;
+}
+
+static void __exit db8500_regulator_exit(void)
+{
+	platform_driver_unregister(&db8500_regulator_driver);
+}
+
+arch_initcall(db8500_regulator_init);
+module_exit(db8500_regulator_exit);
+
+MODULE_AUTHOR("STMicroelectronics/ST-Ericsson");
+MODULE_DESCRIPTION("DB8500 regulator driver");
+MODULE_LICENSE("GPL v2");