diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 84d6ea2..6bfa2a1 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -430,6 +430,23 @@
 	  for accessing the device, additional drivers must be enabled in
 	  order to use the functionality of the device.
 
+config MFD_DA9055
+	bool "Dialog Semiconductor DA9055 PMIC Support"
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select PMIC_DA9055
+	select MFD_CORE
+	depends on I2C=y
+	help
+	  Say yes here for support of Dialog Semiconductor DA9055. This is
+	  a Power Management IC. This driver provides common support for
+	  accessing the device as well as the I2C interface to the chip itself.
+	  Additional drivers must be enabled in order to use the functionality
+	  of the device.
+
+	  This driver can be built as a module. If built as a module it will be
+	  called "da9055"
+
 config PMIC_ADP5520
 	bool "Analog Devices ADP5520/01 MFD PMIC Core Support"
 	depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 083acf9..33c0e49 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -91,6 +91,9 @@
 
 obj-$(CONFIG_MFD_LP8788)	+= lp8788.o lp8788-irq.o
 
+da9055-objs			:= da9055-core.o da9055-i2c.o
+obj-$(CONFIG_MFD_DA9055)	+= da9055.o
+
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o max77686-irq.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o max77693-irq.o
 obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
new file mode 100644
index 0000000..ff6c77f3
--- /dev/null
+++ b/drivers/mfd/da9055-core.c
@@ -0,0 +1,423 @@
+/*
+ * Device access for Dialog DA9055 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.com>
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/input.h>
+#include <linux/irq.h>
+#include <linux/mutex.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/da9055/core.h>
+#include <linux/mfd/da9055/pdata.h>
+#include <linux/mfd/da9055/reg.h>
+
+#define DA9055_IRQ_NONKEY_MASK		0x01
+#define DA9055_IRQ_ALM_MASK		0x02
+#define DA9055_IRQ_TICK_MASK		0x04
+#define DA9055_IRQ_ADC_MASK		0x08
+#define DA9055_IRQ_BUCK_ILIM_MASK	0x08
+
+static bool da9055_register_readable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+	case DA9055_REG_IRQ_MASK_A:
+	case DA9055_REG_IRQ_MASK_B:
+	case DA9055_REG_IRQ_MASK_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_B:
+	case DA9055_REG_CONTROL_C:
+	case DA9055_REG_CONTROL_D:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_CONT:
+	case DA9055_REG_VSYS_MON:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_H:
+	case DA9055_REG_ALARM_D:
+	case DA9055_REG_ALARM_MI:
+	case DA9055_REG_ALARM_MO:
+	case DA9055_REG_ALARM_Y:
+
+	case DA9055_REG_GPIO0_1:
+	case DA9055_REG_GPIO2:
+	case DA9055_REG_GPIO_MODE0_2:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+	case DA9055_REG_BUCK_LIM:
+	case DA9055_REG_BCORE_MODE:
+	case DA9055_REG_VBCORE_A:
+	case DA9055_REG_VBMEM_A:
+	case DA9055_REG_VLDO1_A:
+	case DA9055_REG_VLDO2_A:
+	case DA9055_REG_VLDO3_A:
+	case DA9055_REG_VLDO4_A:
+	case DA9055_REG_VLDO5_A:
+	case DA9055_REG_VLDO6_A:
+	case DA9055_REG_VBCORE_B:
+	case DA9055_REG_VBMEM_B:
+	case DA9055_REG_VLDO1_B:
+	case DA9055_REG_VLDO2_B:
+	case DA9055_REG_VLDO3_B:
+	case DA9055_REG_VLDO4_B:
+	case DA9055_REG_VLDO5_B:
+	case DA9055_REG_VLDO6_B:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool da9055_register_writeable(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+	case DA9055_REG_IRQ_MASK_A:
+	case DA9055_REG_IRQ_MASK_B:
+	case DA9055_REG_IRQ_MASK_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_B:
+	case DA9055_REG_CONTROL_C:
+	case DA9055_REG_CONTROL_D:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_CONT:
+	case DA9055_REG_VSYS_MON:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_H:
+	case DA9055_REG_ALARM_D:
+	case DA9055_REG_ALARM_MI:
+	case DA9055_REG_ALARM_MO:
+	case DA9055_REG_ALARM_Y:
+
+	case DA9055_REG_GPIO0_1:
+	case DA9055_REG_GPIO2:
+	case DA9055_REG_GPIO_MODE0_2:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+	case DA9055_REG_BUCK_LIM:
+	case DA9055_REG_BCORE_MODE:
+	case DA9055_REG_VBCORE_A:
+	case DA9055_REG_VBMEM_A:
+	case DA9055_REG_VLDO1_A:
+	case DA9055_REG_VLDO2_A:
+	case DA9055_REG_VLDO3_A:
+	case DA9055_REG_VLDO4_A:
+	case DA9055_REG_VLDO5_A:
+	case DA9055_REG_VLDO6_A:
+	case DA9055_REG_VBCORE_B:
+	case DA9055_REG_VBMEM_B:
+	case DA9055_REG_VLDO1_B:
+	case DA9055_REG_VLDO2_B:
+	case DA9055_REG_VLDO3_B:
+	case DA9055_REG_VLDO4_B:
+	case DA9055_REG_VLDO5_B:
+	case DA9055_REG_VLDO6_B:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool da9055_register_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case DA9055_REG_STATUS_A:
+	case DA9055_REG_STATUS_B:
+	case DA9055_REG_EVENT_A:
+	case DA9055_REG_EVENT_B:
+	case DA9055_REG_EVENT_C:
+
+	case DA9055_REG_CONTROL_A:
+	case DA9055_REG_CONTROL_E:
+
+	case DA9055_REG_ADC_MAN:
+	case DA9055_REG_ADC_RES_L:
+	case DA9055_REG_ADC_RES_H:
+	case DA9055_REG_VSYS_RES:
+	case DA9055_REG_ADCIN1_RES:
+	case DA9055_REG_ADCIN2_RES:
+	case DA9055_REG_ADCIN3_RES:
+
+	case DA9055_REG_COUNT_S:
+	case DA9055_REG_COUNT_MI:
+	case DA9055_REG_COUNT_H:
+	case DA9055_REG_COUNT_D:
+	case DA9055_REG_COUNT_MO:
+	case DA9055_REG_COUNT_Y:
+	case DA9055_REG_ALARM_MI:
+
+	case DA9055_REG_BCORE_CONT:
+	case DA9055_REG_BMEM_CONT:
+	case DA9055_REG_LDO1_CONT:
+	case DA9055_REG_LDO2_CONT:
+	case DA9055_REG_LDO3_CONT:
+	case DA9055_REG_LDO4_CONT:
+	case DA9055_REG_LDO5_CONT:
+	case DA9055_REG_LDO6_CONT:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static struct regmap_irq da9055_irqs[] = {
+	[DA9055_IRQ_NONKEY] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_NONKEY_MASK,
+	},
+	[DA9055_IRQ_ALARM] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_ALM_MASK,
+	},
+	[DA9055_IRQ_TICK] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_TICK_MASK,
+	},
+	[DA9055_IRQ_HWMON] = {
+		.reg_offset = 0,
+		.mask = DA9055_IRQ_ADC_MASK,
+	},
+	[DA9055_IRQ_REGULATOR] = {
+		.reg_offset = 1,
+		.mask = DA9055_IRQ_BUCK_ILIM_MASK,
+	},
+};
+
+struct regmap_config da9055_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.cache_type = REGCACHE_RBTREE,
+
+	.max_register = DA9055_MAX_REGISTER_CNT,
+	.readable_reg = da9055_register_readable,
+	.writeable_reg = da9055_register_writeable,
+	.volatile_reg = da9055_register_volatile,
+};
+EXPORT_SYMBOL_GPL(da9055_regmap_config);
+
+static struct resource da9055_onkey_resource = {
+	.name = "ONKEY",
+	.start = DA9055_IRQ_NONKEY,
+	.end   = DA9055_IRQ_NONKEY,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct resource da9055_rtc_resource[] = {
+	{
+		.name = "ALM",
+		.start = DA9055_IRQ_ALARM,
+		.end   = DA9055_IRQ_ALARM,
+		.flags = IORESOURCE_IRQ,
+	},
+	{
+		.name = "TICK",
+		.start = DA9055_IRQ_TICK,
+		.end   = DA9055_IRQ_TICK,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct resource da9055_hwmon_resource = {
+	.name = "HWMON",
+	.start = DA9055_IRQ_HWMON,
+	.end   = DA9055_IRQ_HWMON,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct resource da9055_ld05_6_resource = {
+	.name = "REGULATOR",
+	.start = DA9055_IRQ_REGULATOR,
+	.end   = DA9055_IRQ_REGULATOR,
+	.flags = IORESOURCE_IRQ,
+};
+
+static struct mfd_cell da9055_devs[] = {
+	{
+		.of_compatible = "dialog,da9055-gpio",
+		.name = "da9055-gpio",
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 2,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 3,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 4,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 5,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 6,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 7,
+		.resources = &da9055_ld05_6_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-regulator",
+		.name = "da9055-regulator",
+		.resources = &da9055_ld05_6_resource,
+		.num_resources = 1,
+		.id = 8,
+	},
+	{
+		.of_compatible = "dialog,da9055-onkey",
+		.name = "da9055-onkey",
+		.resources = &da9055_onkey_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-rtc",
+		.name = "da9055-rtc",
+		.resources = da9055_rtc_resource,
+		.num_resources = ARRAY_SIZE(da9055_rtc_resource),
+	},
+	{
+		.of_compatible = "dialog,da9055-hwmon",
+		.name = "da9055-hwmon",
+		.resources = &da9055_hwmon_resource,
+		.num_resources = 1,
+	},
+	{
+		.of_compatible = "dialog,da9055-watchdog",
+		.name = "da9055-watchdog",
+	},
+};
+
+static struct regmap_irq_chip da9055_regmap_irq_chip = {
+	.name = "da9055_irq",
+	.status_base = DA9055_REG_EVENT_A,
+	.mask_base = DA9055_REG_IRQ_MASK_A,
+	.ack_base = DA9055_REG_EVENT_A,
+	.num_regs = 3,
+	.irqs = da9055_irqs,
+	.num_irqs = ARRAY_SIZE(da9055_irqs),
+};
+
+int __devinit da9055_device_init(struct da9055 *da9055)
+{
+	struct da9055_pdata *pdata = da9055->dev->platform_data;
+	int ret;
+
+	if (pdata && pdata->init != NULL)
+		pdata->init(da9055);
+
+	if (!pdata || !pdata->irq_base)
+		da9055->irq_base = -1;
+	else
+		da9055->irq_base = pdata->irq_base;
+
+	ret = regmap_add_irq_chip(da9055->regmap, da9055->chip_irq,
+				  IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+				  da9055->irq_base, &da9055_regmap_irq_chip,
+				  &da9055->irq_data);
+	if (ret < 0)
+		return ret;
+
+	da9055->irq_base = regmap_irq_chip_get_base(da9055->irq_data);
+
+	ret = mfd_add_devices(da9055->dev, -1,
+			      da9055_devs, ARRAY_SIZE(da9055_devs),
+			      NULL, da9055->irq_base, NULL);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	mfd_remove_devices(da9055->dev);
+	return ret;
+}
+
+void __devexit da9055_device_exit(struct da9055 *da9055)
+{
+	regmap_del_irq_chip(da9055->chip_irq, da9055->irq_data);
+	mfd_remove_devices(da9055->dev);
+}
+
+MODULE_DESCRIPTION("Core support for the DA9055 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
diff --git a/drivers/mfd/da9055-i2c.c b/drivers/mfd/da9055-i2c.c
new file mode 100644
index 0000000..88f6dca
--- /dev/null
+++ b/drivers/mfd/da9055-i2c.c
@@ -0,0 +1,93 @@
+ /* I2C access for DA9055 PMICs.
+ *
+ * Copyright(c) 2012 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@diasemi.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+
+#include <linux/mfd/da9055/core.h>
+
+static int __devinit da9055_i2c_probe(struct i2c_client *i2c,
+				      const struct i2c_device_id *id)
+{
+	struct da9055 *da9055;
+	int ret;
+
+	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
+	if (!da9055)
+		return -ENOMEM;
+
+	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
+	if (IS_ERR(da9055->regmap)) {
+		ret = PTR_ERR(da9055->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	da9055->dev = &i2c->dev;
+	da9055->chip_irq = i2c->irq;
+
+	i2c_set_clientdata(i2c, da9055);
+
+	return da9055_device_init(da9055);
+}
+
+static int __devexit da9055_i2c_remove(struct i2c_client *i2c)
+{
+	struct da9055 *da9055 = i2c_get_clientdata(i2c);
+
+	da9055_device_exit(da9055);
+
+	return 0;
+}
+
+static struct i2c_device_id da9055_i2c_id[] = {
+	{"da9055-pmic", 0},
+	{ }
+};
+
+static struct i2c_driver da9055_i2c_driver = {
+	.probe = da9055_i2c_probe,
+	.remove = __devexit_p(da9055_i2c_remove),
+	.id_table = da9055_i2c_id,
+	.driver = {
+		.name = "da9055",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init da9055_i2c_init(void)
+{
+	int ret;
+
+	ret = i2c_add_driver(&da9055_i2c_driver);
+	if (ret != 0) {
+		pr_err("DA9055 I2C registration failed %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+subsys_initcall(da9055_i2c_init);
+
+static void __exit da9055_i2c_exit(void)
+{
+	i2c_del_driver(&da9055_i2c_driver);
+}
+module_exit(da9055_i2c_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
+MODULE_LICENSE("GPL");