[RESEND PATCH V1] regulator: DA9211 : new regulator driver

* [RESEND PATCH V1] regulator: DA9211 : new regulator driver
@ 2014-05-14  3:02 James Ban
  2014-05-14 20:20 ` Mark Brown
  0 siblings, 1 reply; 3+ messages in thread
From: James Ban @ 2014-05-14  3:02 UTC (permalink / raw)
  To: Liam Girdwood, Mark Brown, Support Opensource, LKML
  Cc: Guennadi Liakhovetski, David Dajun Chen

This is the driver for the Dialog DA9211 Multi-phase 12A DC-DC Buck
Converter regulator. It communicates via an I2C bus to the device.

Signed-off-by: James Ban <james.ban.opensource@diasemi.com>
---

Please ignore previous patch since it has a bug on two bucks configuration.
This patch is relative to linux-next repository tag next-20140509

 drivers/regulator/Kconfig            |  10 +
 drivers/regulator/Makefile           |   1 +
 drivers/regulator/da9211-regulator.c | 922 +++++++++++++++++++++++++++++++++++
 drivers/regulator/da9211-regulator.h | 271 ++++++++++
 include/linux/regulator/da9211.h     |  81 +++
 5 files changed, 1285 insertions(+)
 create mode 100644 drivers/regulator/da9211-regulator.c
 create mode 100644 drivers/regulator/da9211-regulator.h
 create mode 100644 include/linux/regulator/da9211.h

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index b4f57a4..3b0c28d 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -198,6 +198,16 @@ config REGULATOR_DA9210
 	  converter 12A DC-DC Buck controlled through an I2C
 	  interface.
 
+config REGULATOR_DA9211
+	tristate "Dialog Semiconductor DA9211/DA9212 regulator"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say y here to support for the Dialog Semiconductor DA9211/DA9212.
+	  The DA9211/DA9212 is a multi-phase synchronous step down
+	  converter 12A DC-DC Buck controlled through an I2C
+	  interface.
+
 config REGULATOR_DBX500_PRCMU
 	bool
 
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index c14696b2..8c0c0e3 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -27,6 +27,7 @@ obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
 obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o
 obj-$(CONFIG_REGULATOR_DA9063)	+= da9063-regulator.o
 obj-$(CONFIG_REGULATOR_DA9210) += da9210-regulator.o
+obj-$(CONFIG_REGULATOR_DA9211) += da9211-regulator.o
 obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
 obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
new file mode 100644
index 0000000..2b1bd90
--- /dev/null
+++ b/drivers/regulator/da9211-regulator.c
@@ -0,0 +1,922 @@
+/*
+ * da9211-regulator.c - Regulator device driver for DA9211
+ * Copyright (C) 2014  Dialog Semiconductor Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regmap.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/da9211.h>
+#include "da9211-regulator.h"
+
+#define DA9211_BUCK_MODE_SLEEP	1
+#define DA9211_BUCK_MODE_SYNC	2
+#define DA9211_BUCK_MODE_AUTO	3
+
+/* DA9211 REGULATOR IDs */
+#define DA9211_ID_BUCKA	0
+#define DA9211_ID_BUCKB	1
+
+struct da9211_conf_reg {
+	int reg;
+	int sel_mask;
+};
+
+struct da9211_volt_reg {
+	int reg_a;
+	int reg_b;
+	int v_mask;
+};
+
+struct da9211_mode_reg {
+	int reg;
+	int mask;
+	int shift;
+};
+
+struct da9211_regulator_info {
+	struct regulator_desc reg_desc;
+	struct da9211_conf_reg conf;
+	struct da9211_volt_reg volt;
+	struct da9211_mode_reg mode;
+	int current_shift;
+};
+
+/* Number of IRQ and IRQ offset */
+enum {
+	DA9211_INT_OFFSET_1 = 0,
+	DA9211_INT_OFFSET_2,
+	DA9211_NUM_IRQ_EVT_REGS
+};
+
+struct da9211_irq {
+	irq_handler_t handler;
+	void *data;
+};
+
+struct da9211 {
+	struct device *dev;
+	struct regmap *regmap;
+	struct da9211_pdata *pdata;
+	struct da9211_regulator_info *info;
+	struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
+	int num_regulator;
+	/* Interrupt handling */
+	struct work_struct irq_work;
+	struct task_struct *irq_task;
+	struct mutex irq_mutex; /* IRQ table mutex */
+	struct da9211_irq irq[DA9211_NUM_IRQ];
+	int chip_irq;
+};
+
+struct da9211_regulator {
+	struct da9211 *da9211;
+	struct da9211_regulator_info *info;
+	struct regulator_dev *rdev;
+	enum da9211_gpio_rsel_select reg_rselect;
+};
+
+static const struct regmap_config da9211_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+/* Default limits measured in millivolts and milliamps */
+#define DA9211_MIN_MV		300
+#define DA9211_MAX_MV		1570
+#define DA9211_STEP_MV		10
+
+/* Current limits for buck (uA) indices corresponds with register values */
+static const int da9211_current_limits[] = {
+	2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
+	3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
+};
+
+/* struct of IRQ's register and mask */
+struct da9211_irq_data {
+	int reg_offset;
+	int mask;
+};
+
+static struct da9211_irq_data da9211_irqs[] = {
+	[DA9211_IRQ_EGPI0] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_GPI0,
+	},
+	[DA9211_IRQ_EGPI1] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_GPI1,
+	},
+	[DA9211_IRQ_EGPI2] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_GPI2,
+	},
+	[DA9211_IRQ_EGPI3] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_GPI3,
+	},
+	[DA9211_IRQ_EGPI4] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_GPI4,
+	},
+	[DA9211_IRQ_EUVLO_IO] = {
+		.reg_offset = DA9211_INT_OFFSET_1,
+		.mask = DA9211_M_UVLO_IO,
+	},
+	[DA9211_IRQ_EPWRGOOD_A] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_PWRGOOD_A,
+	},
+	[DA9211_IRQ_EPWRGOOD_B] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_PWRGOOD_B,
+	},
+	[DA9211_IRQ_ETEMP_WARN] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_TEMP_WARN,
+	},
+	[DA9211_IRQ_ETEMP_CRIT] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_TEMP_CRIT,
+	},
+	[DA9211_IRQ_EOV_CURR_A] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_OV_CURR_A,
+	},
+	[DA9211_IRQ_EOV_CURR_B] = {
+		.reg_offset = DA9211_INT_OFFSET_2,
+		.mask = DA9211_M_OV_CURR_B,
+	},
+};
+
+static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	unsigned int data;
+	int ret, mode = 0;
+
+	ret = regmap_read(chip->regmap, info->mode.reg, &data);
+
+	if (ret < 0)
+		return ret;
+
+	switch ((data & info->mode.mask) >> info->mode.shift) {
+	case DA9211_BUCK_MODE_SYNC:
+		mode = REGULATOR_MODE_FAST;
+		break;
+	case DA9211_BUCK_MODE_AUTO:
+		mode = REGULATOR_MODE_NORMAL;
+		break;
+	case DA9211_BUCK_MODE_SLEEP:
+		mode = REGULATOR_MODE_STANDBY;
+		break;
+	}
+
+	return mode;
+}
+
+static int da9211_buck_set_mode(struct regulator_dev *rdev,
+					unsigned int mode)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	int val = 0;
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		val = DA9211_BUCK_MODE_SYNC << info->mode.shift;
+		break;
+	case REGULATOR_MODE_NORMAL:
+		val = DA9211_BUCK_MODE_AUTO << info->mode.shift;
+		break;
+	case REGULATOR_MODE_STANDBY:
+		val = DA9211_BUCK_MODE_SLEEP << info->mode.shift;
+		break;
+	}
+
+	return regmap_update_bits(chip->regmap, info->mode.reg,
+					info->mode.mask, val);
+}
+
+static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
+				    int max)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	int i;
+
+	/* search for closest to maximum */
+	for (i = ARRAY_SIZE(da9211_current_limits)-1; i >= 0; i--) {
+		if (min <= da9211_current_limits[i] &&
+		    max >= da9211_current_limits[i]) {
+				return regmap_update_bits(chip->regmap,
+					DA9211_REG_BUCK_ILIM,
+					(0x0F << info->current_shift), i);
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int da9211_regulator_enable(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	int ret;
+
+	/* Make sure to exit from suspend mode on enable */
+	if (regulator->reg_rselect == DA9211_RSEL_NO_GPIO) {
+		ret = regmap_update_bits(chip->regmap, info->conf.reg,
+					info->conf.sel_mask,
+					DA9211_VBUCKA_SEL_A);
+		if (ret < 0)
+			return ret;
+	}
+
+	return regulator_enable_regmap(rdev);
+}
+
+static int da9211_get_current_limit(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
+	if (ret < 0)
+		return ret;
+
+	/* select one of 16 values: 0000 (2000mA) to 1111 (5000mA) */
+	data = (data >> info->current_shift) & 0x0F;
+	return da9211_current_limits[data];
+}
+
+static int da9211_regulator_get_voltage_sel(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	struct da9211_volt_reg volt = info->volt;
+	unsigned int data;
+	int ret, sel;
+
+	/*
+	 * There are two voltage register set A & B for voltage ramping but
+	 * either one of then can be active therefore we first determine
+	 * the active register set.
+	 */
+	ret = regmap_read(chip->regmap, info->conf.reg, &data);
+	if (ret < 0)
+		return ret;
+
+	data &= info->conf.sel_mask;
+
+	/* Get the voltage for the active register set A/B */
+	if (data == DA9211_VBUCKA_SEL_A)
+		ret = regmap_read(chip->regmap, volt.reg_a, &data);
+	else
+		ret = regmap_read(chip->regmap, volt.reg_b, &data);
+
+	if (ret < 0)
+		return ret;
+
+	sel = (data & volt.v_mask);
+	return sel;
+}
+
+static int da9211_regulator_set_voltage_sel(struct regulator_dev *rdev,
+					    unsigned int selector)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	unsigned int data;
+	int ret;
+
+	/*
+	 * Regulator register set A/B is not selected through GPIO therefore
+	 * we use default register set A for voltage ramping.
+	 */
+	if (regulator->reg_rselect == DA9211_RSEL_NO_GPIO) {
+		/* Select register set A */
+		ret = regmap_update_bits(chip->regmap, info->conf.reg,
+					info->conf.sel_mask,
+					DA9211_VBUCKA_SEL_A);
+		if (ret < 0)
+			return ret;
+
+		/* Set the voltage */
+		return regmap_update_bits(chip->regmap, info->volt.reg_a,
+					 info->volt.v_mask, selector);
+	}
+
+	/*
+	 * Here regulator register set A/B is selected through GPIO.
+	 * Therefore we first determine the selected register set A/B and
+	 * then set the desired voltage for that register set A/B.
+	 */
+	ret = regmap_read(chip->regmap, info->conf.reg, &data);
+	if (ret < 0)
+		return ret;
+
+	data &= info->conf.sel_mask;
+
+	/* Set the voltage */
+	if (data == DA9211_VBUCKA_SEL_A)
+		return regmap_update_bits(chip->regmap, info->volt.reg_a,
+					 info->volt.v_mask, selector);
+	else
+		return regmap_update_bits(chip->regmap, info->volt.reg_b,
+					 info->volt.v_mask, selector);
+}
+
+static int da9211_regulator_set_suspend_voltage(struct regulator_dev *rdev,
+						int uV)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+	int ret;
+
+	/* Select register set B for suspend voltage ramping. */
+	if (regulator->reg_rselect == DA9211_RSEL_NO_GPIO) {
+		ret = regmap_update_bits(chip->regmap, info->conf.reg,
+					info->conf.sel_mask,
+					DA9211_VBUCKA_SEL_B);
+		if (ret < 0)
+			return ret;
+	}
+
+	ret = regulator_map_voltage_linear(rdev, uV, uV);
+	if (ret < 0)
+		return ret;
+
+	return regmap_update_bits(chip->regmap, info->volt.reg_b,
+				 info->volt.v_mask, ret);
+}
+
+static int da9211_suspend_enable(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+
+	/* Select register set B for voltage ramping. */
+	if (regulator->reg_rselect == DA9211_RSEL_NO_GPIO)
+		return regmap_update_bits(chip->regmap, info->conf.reg,
+					info->conf.sel_mask,
+					DA9211_VBUCKA_SEL_B);
+	else
+		return 0;
+}
+
+static int da9211_suspend_disable(struct regulator_dev *rdev)
+{
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9211_regulator_info *info = regulator->info;
+	struct da9211 *chip = regulator->da9211;
+
+	/* Diselect register set B. */
+	if (regulator->reg_rselect == DA9211_RSEL_NO_GPIO)
+		return regmap_update_bits(chip->regmap, info->conf.reg,
+					info->conf.sel_mask,
+					DA9211_VBUCKA_SEL_A);
+	else
+		return 0;
+}
+
+static struct regulator_ops da9211_buck_ops = {
+	.get_mode = da9211_buck_get_mode,
+	.set_mode = da9211_buck_set_mode,
+	.enable = da9211_regulator_enable,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.map_voltage = regulator_map_voltage_linear,
+	.set_voltage_sel = da9211_regulator_set_voltage_sel,
+	.get_voltage_sel = da9211_regulator_get_voltage_sel,
+	.list_voltage = regulator_list_voltage_linear,
+	.set_current_limit = da9211_set_current_limit,
+	.get_current_limit = da9211_get_current_limit,
+	.set_suspend_voltage = da9211_regulator_set_suspend_voltage,
+	.set_suspend_enable = da9211_suspend_enable,
+	.set_suspend_disable = da9211_suspend_disable,
+	.set_suspend_mode = da9211_buck_set_mode,
+};
+
+#define DA9211_BUCK(_id, step, min, max, vbits, voffset, cshift, oc_irq) \
+{\
+	.reg_desc = {\
+		.name = #_id,\
+		.ops = &da9211_buck_ops,\
+		.irq = oc_irq, \
+		.type = REGULATOR_VOLTAGE,\
+		.id = DA9211_ID_##_id,\
+		.n_voltages = (max - min) / step + 1 + (voffset), \
+		.enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id, \
+		.enable_mask = 1,\
+		.min_uV = (min) * 1000,\
+		.uV_step = (step) * 1000,\
+		.linear_min_sel = (voffset),\
+		.owner = THIS_MODULE,\
+	},\
+	.conf = {\
+		.reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id, \
+		.sel_mask = (1 << 4),\
+	},\
+	.volt = {\
+		.reg_a = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2, \
+		.reg_b = DA9211_REG_VBUCKA_B + DA9211_ID_##_id * 2, \
+		.v_mask = (1 << (vbits)) - 1,\
+	},\
+	.mode = {\
+		.reg = DA9211_REG_BUCKA_CONF + DA9211_ID_##_id,\
+		.mask = 3,\
+		.shift = 0,\
+	},\
+	.current_shift = cshift,\
+}
+
+static struct da9211_regulator_info da9211_regulator_info[] = {
+	DA9211_BUCK(BUCKA, DA9211_STEP_MV, DA9211_MIN_MV, DA9211_MAX_MV, 7, 0,
+		0, DA9211_IRQ_EOV_CURR_A),
+	DA9211_BUCK(BUCKB, DA9211_STEP_MV, DA9211_MIN_MV, DA9211_MAX_MV, 7, 0,
+		4, DA9211_IRQ_EOV_CURR_B),
+};
+
+/*
+ * Configures regulator to be controlled either through GPIO 0, 1 or 3.
+ * GPIO can control regulator state and/or select the regulator register
+ * set A/B for voltage ramping.
+ */
+static int da9211_gpio_init(struct da9211_regulator *regulator,
+				struct regulator_config *config,
+				struct da9211_pdata *pdata, int id)
+{
+	struct da9211 *chip = regulator->da9211;
+	int ret = 0;
+
+	if (pdata->buck_data[id].gpio_ren) {
+
+		config->ena_gpio = pdata->buck_data[id].gpio_ren;
+		config->ena_gpio_flags = pdata->buck_data[id].ena_init_state;
+		config->ena_gpio_invert = 0;
+
+		/*
+		 * Let the regulator know that its state is controlled
+		 * through GPI.
+		 */
+		ret = regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONT+id,
+						DA9211_BUCKA_GPI_MASK,
+						pdata->buck_data[id].reg_ren
+						<< DA9211_BUCKA_GPI_SHIFT);
+		if (ret < 0)
+			goto err;
+	}
+
+	if (pdata->buck_data[id].gpio_rsel) {
+		char name[18];
+
+		regulator->reg_rselect = pdata->buck_data[id].reg_rsel;
+		/*
+		 * GPI pin is muxed with regulator to select the
+		 * regulator register set A/B for voltage ramping.
+		 */
+		sprintf(name, "DA9211 RSEL %d", id);
+		ret = devm_gpio_request_one(config->dev,
+			pdata->buck_data[id].gpio_rsel,
+			GPIOF_OUT_INIT_LOW, name);
+		if (ret < 0)
+			goto err;
+
+		/*
+		 * Let the regulator know that its register set A/B
+		 * will be selected through GPI for voltage ramping.
+		 */
+		ret = regmap_update_bits(chip->regmap,
+			DA9211_REG_BUCKA_CONT+id,
+			DA9211_VBUCKA_GPI_MASK,
+			pdata->buck_data[id].reg_rsel
+			<< DA9211_VBUCKA_GPI_SHIFT);
+	}
+
+err:
+	return ret;
+}
+
+static inline struct da9211_regulator_info *find_regulator_info(int id)
+{
+	struct da9211_regulator_info *info;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(da9211_regulator_info); i++) {
+		info = &da9211_regulator_info[i];
+		if (info->reg_desc.id == id)
+			return info;
+	}
+
+	return NULL;
+}
+
+int da9211_enable_irq(struct da9211 *chip, int irq)
+{
+	enable_irq(irq);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(da9211_enable_irq);
+
+int da9211_disable_irq(struct da9211 *chip, int irq)
+{
+
+	disable_irq(irq);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(da9211_disable_irq);
+
+int da9211_mask_irq(struct da9211 *chip, int irq)
+{
+	regmap_update_bits(chip->regmap, DA9211_REG_MASK_A
+		+ da9211_irqs[irq].reg_offset, da9211_irqs[irq].mask, 1);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(da9211_mask_irq);
+
+int da9211_unmask_irq(struct da9211 *chip, int irq)
+{
+	regmap_update_bits(chip->regmap, DA9211_REG_MASK_A
+		+ da9211_irqs[irq].reg_offset, da9211_irqs[irq].mask, 0);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(da9211_unmask_irq);
+
+static void da9211_irq_call_handler(struct da9211 *chip, int irq)
+{
+	mutex_lock(&chip->irq_mutex);
+
+	if (chip->irq[irq].handler)
+		chip->irq[irq].handler(irq, chip->irq[irq].data);
+	else
+		da9211_mask_irq(chip, irq);
+
+	mutex_unlock(&chip->irq_mutex);
+}
+
+static irqreturn_t da9211_irq(int irq, void *data)
+{
+	struct da9211 *chip = data;
+	int reg_val;
+	int sub_reg[DA9211_NUM_IRQ_EVT_REGS] = {0,};
+	int read_done[DA9211_NUM_IRQ_EVT_REGS];
+	struct da9211_irq_data *irq_data;
+	int i, ret;
+
+	memset(&read_done, 0, sizeof(read_done));
+
+	for (i = 0; i < ARRAY_SIZE(da9211_irqs); i++) {
+		irq_data = &da9211_irqs[i];
+
+		if (!read_done[irq_data->reg_offset]) {
+			ret = regmap_read(chip->regmap, DA9211_REG_EVENT_A
+				+ irq_data->reg_offset, &reg_val);
+
+			if (ret < 0)
+				return ret;
+
+			sub_reg[irq_data->reg_offset] = reg_val;
+			ret = regmap_read(chip->regmap, DA9211_REG_MASK_A
+				+ irq_data->reg_offset, &reg_val);
+
+			if (ret < 0)
+				return ret;
+
+			sub_reg[irq_data->reg_offset] &= ~reg_val;
+			read_done[irq_data->reg_offset] = 1;
+		}
+
+		if (sub_reg[irq_data->reg_offset] & irq_data->mask) {
+			da9211_irq_call_handler(chip, i);
+			/* Now clear EVENT registers */
+			ret = regmap_write(chip->regmap, DA9211_REG_EVENT_A
+				+ irq_data->reg_offset, da9211_irqs[i].mask);
+
+			if (ret < 0)
+				return ret;
+		}
+	}
+	return IRQ_HANDLED;
+}
+
+int da9211_request_irq(struct da9211 *chip, int irq, char *name,
+			   irq_handler_t handler, void *data)
+{
+	if (irq < 0 || irq >= DA9211_NUM_IRQ || !handler)
+		return -EINVAL;
+
+	if (chip->irq[irq].handler)
+		return -EBUSY;
+	mutex_lock(&chip->irq_mutex);
+	chip->irq[irq].handler = handler;
+	chip->irq[irq].data = data;
+	mutex_unlock(&chip->irq_mutex);
+
+	da9211_unmask_irq(chip, irq);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(da9211_request_irq);
+
+void da9211_free_irq(struct da9211 *chip, int irq)
+{
+	if (irq < 0 || irq >= DA9211_NUM_IRQ)
+		return;
+
+	da9211_mask_irq(chip, irq);
+
+	mutex_lock(&chip->irq_mutex);
+	chip->irq[irq].handler = NULL;
+	mutex_unlock(&chip->irq_mutex);
+}
+EXPORT_SYMBOL_GPL(da9211_free_irq);
+
+int da9211_irq_exit(struct da9211 *chip)
+{
+	free_irq(chip->chip_irq, chip);
+
+	return 0;
+}
+
+static int da9211_irq_init(struct da9211 *chip)
+{
+	int ret = -EINVAL;
+
+	mutex_init(&chip->irq_mutex);
+
+	ret = regmap_write(chip->regmap, DA9211_REG_EVENT_A, 0xFF);
+	if (ret != 0) {
+		dev_err(chip->dev, "Failed to clear event A\n");
+		return ret;
+	}
+	ret = regmap_write(chip->regmap, DA9211_REG_EVENT_B, 0xFF);
+	if (ret != 0) {
+		dev_err(chip->dev, "Failed to clear event B\n");
+		return ret;
+	}
+	ret = request_threaded_irq(chip->chip_irq, NULL, da9211_irq,
+			IRQF_TRIGGER_LOW|IRQF_ONESHOT,
+			"da9211", chip);
+	if (ret != 0) {
+		dev_err(chip->dev, "Failed to request IRQ: %d\n",
+			chip->chip_irq);
+		return ret;
+	}
+	dev_info(chip->dev, "# IRQ configured [%d]\n", chip->chip_irq);
+
+	enable_irq_wake(chip->chip_irq);
+
+	return ret;
+}
+
+static irqreturn_t da9211_oc_handler(int irq, void *data)
+{
+	struct regulator_dev *rdev = (struct regulator_dev *)data;
+	struct da9211_regulator *regulator = rdev_get_drvdata(rdev);
+
+	regulator_notifier_call_chain(rdev, REGULATOR_EVENT_OVER_CURRENT,
+		regulator);
+
+	return IRQ_HANDLED;
+}
+
+static int da9211_regulator_init(struct da9211 *chip)
+{
+	struct regulator_config config = { };
+	struct da9211_regulator *regulator;
+	int i, ret;
+	unsigned int data;
+
+	ret = regmap_update_bits(chip->regmap, DA9211_REG_PAGE_CON,
+			DA9211_REG_PAGE_MASK, DA9211_REG_PAGE2);
+
+	if (ret < 0) {
+		dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret);
+		goto err;
+	}
+
+	ret = regmap_read(chip->regmap, DA9211_REG_CONTROL_E, &data);
+
+	if (ret < 0) {
+		ret = regmap_update_bits(chip->regmap, DA9211_REG_PAGE_CON,
+			DA9211_REG_PAGE_MASK, DA9211_REG_PAGE0);
+		ret = -EINVAL;
+		dev_err(chip->dev, "Failed to read CONTROL_E reg: %d\n", ret);
+		goto err;
+	}
+
+	data &= DA9211_SLAVE_SEL;
+	/* If configuration for 1/2 bucks is different between platform data
+	 * and the register, driver should exit.
+	 */
+	if ((chip->pdata->num_buck == 2 && data == 0x40)
+		|| (chip->pdata->num_buck == 1 && data == 0x00)) {
+		if (data == 0)
+			chip->num_regulator = 1;
+		else
+			chip->num_regulator = 2;
+	} else {
+		ret = regmap_update_bits(chip->regmap, DA9211_REG_PAGE_CON,
+			DA9211_REG_PAGE_MASK, DA9211_REG_PAGE0);
+		ret = -EINVAL;
+		dev_err(chip->dev, "Configuration is mismatched\n");
+		goto err;
+	}
+
+	ret = regmap_update_bits(chip->regmap, DA9211_REG_PAGE_CON,
+			DA9211_REG_PAGE_MASK, DA9211_REG_PAGE0);
+
+	if (ret < 0) {
+		dev_err(chip->dev, "Failed to update PAGE reg: %d\n", ret);
+		goto err;
+	}
+
+	for (i = 0; i < chip->num_regulator; i++) {
+		regulator = devm_kzalloc(chip->dev,
+			sizeof(struct da9211_regulator),
+			GFP_KERNEL);
+		if (!regulator) {
+			ret = -ENOMEM;
+			goto err_regulator;
+		}
+
+		regulator->da9211 = chip;
+
+		regulator->info = find_regulator_info(i);
+		if (regulator->info == NULL) {
+			dev_err(chip->dev,
+				"Invalid regulator ID specified\n");
+			ret = -EINVAL;
+			goto err_regulator;
+		}
+
+		if (chip->pdata)
+			config.init_data =
+				chip->pdata->buck_data[i].constraints;
+
+		config.dev = chip->dev;
+		config.driver_data = regulator;
+		config.regmap = chip->regmap;
+
+		ret = da9211_gpio_init(regulator, &config, chip->pdata, i);
+
+		if (ret < 0)
+			goto err_regulator;
+
+		regulator->rdev = regulator_register(&regulator->info->reg_desc,
+			&config);
+		if (IS_ERR(regulator->rdev)) {
+			dev_err(chip->dev,
+				"Failed to register DA9211 regulator\n");
+			ret = PTR_ERR(regulator->rdev);
+			goto err_regulator;
+		}
+
+		chip->rdev[i] = regulator->rdev;
+
+		if (chip->irq > 0) {
+			ret = da9211_request_irq(chip,
+				da9211_regulator_info[i].reg_desc.irq, NULL,
+				da9211_oc_handler, regulator->rdev);
+			if (ret < 0) {
+				regulator_unregister(chip->rdev[i]);
+				dev_err(chip->dev,
+					"Failed to register OC irq\n");
+				goto err_irq;
+			}
+		}
+	}
+
+	return 0;
+
+err_irq:
+	i++;
+err_regulator:
+	while (--i >= 0)
+		regulator_unregister(chip->rdev[i]);
+err:
+	return ret;
+}
+/*
+ * I2C driver interface functions
+ */
+static int da9211_i2c_probe(struct i2c_client *i2c,
+		const struct i2c_device_id *id)
+{
+	struct da9211 *chip;
+	int error, ret;
+
+	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
+	if (NULL == chip) {
+		dev_err(&i2c->dev,
+			"Cannot kzalloc memory for regulator structure\n");
+		return -ENOMEM;
+	}
+
+	chip->dev = &i2c->dev;
+	chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
+	if (IS_ERR(chip->regmap)) {
+		error = PTR_ERR(chip->regmap);
+		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+			error);
+		return error;
+	}
+
+	i2c_set_clientdata(i2c, chip);
+
+	chip->pdata = i2c->dev.platform_data;
+
+	if (!chip->pdata) {
+		dev_err(&i2c->dev, "No platform init data supplied\n");
+		return -ENODEV;
+	}
+
+	chip->chip_irq = i2c->irq;
+
+	if (chip->chip_irq != 0) {
+		ret = da9211_irq_init(chip);
+		if (ret < 0) {
+			dev_err(&i2c->dev, "Failed to initialize irq: %d\n",
+				ret);
+			return ret;
+		}
+	} else {
+		dev_warn(chip->dev, "No IRQ configured\n");
+	}
+
+	ret = da9211_regulator_init(chip);
+
+	if (ret < 0)
+		dev_err(&i2c->dev, "Failed to initialize regulator: %d\n", ret);
+
+	return ret;
+}
+
+static int da9211_i2c_remove(struct i2c_client *i2c)
+{
+	struct da9211 *chip = i2c_get_clientdata(i2c);
+	int i;
+
+	for (i = 0; i < chip->num_regulator; i++)
+		regulator_unregister(chip->rdev[i]);
+
+	if (chip->irq != 0)
+		da9211_free_irq(chip, chip->chip_irq);
+
+	return 0;
+}
+
+static const struct i2c_device_id da9211_i2c_id[] = {
+	{"da9211", 0},
+	{},
+};
+
+MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
+
+static struct i2c_driver da9211_regulator_driver = {
+	.driver = {
+		.name = "da9211",
+		.owner = THIS_MODULE,
+	},
+	.probe = da9211_i2c_probe,
+	.remove = da9211_i2c_remove,
+	.id_table = da9211_i2c_id,
+};
+
+module_i2c_driver(da9211_regulator_driver);
+
+MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
+MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/regulator/da9211-regulator.h b/drivers/regulator/da9211-regulator.h
new file mode 100644
index 0000000..afba596
--- /dev/null
+++ b/drivers/regulator/da9211-regulator.h
@@ -0,0 +1,271 @@
+/*
+ * da9211-regulator.h - Regulator definitions for DA9211
+ * Copyright (C) 2014  Dialog Semiconductor Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ */
+
+#ifndef __DA9211_REGISTERS_H__
+#define __DA9211_REGISTERS_H__
+
+/* Page selection */
+#define	DA9211_REG_PAGE_CON			0x00
+
+/* System Control and Event Registers */
+#define	DA9211_REG_STATUS_A			0x50
+#define	DA9211_REG_STATUS_B			0x51
+#define	DA9211_REG_EVENT_A			0x52
+#define	DA9211_REG_EVENT_B			0x53
+#define	DA9211_REG_MASK_A			0x54
+#define	DA9211_REG_MASK_B			0x55
+#define	DA9211_REG_CONTROL_A		0x56
+
+/* GPIO Control Registers */
+#define	DA9211_REG_GPIO_0_1			0x58
+#define	DA9211_REG_GPIO_2_3			0x59
+#define	DA9211_REG_GPIO_4			0x5A
+
+/* Regulator Registers */
+#define	DA9211_REG_BUCKA_CONT			0x5D
+#define	DA9211_REG_BUCKB_CONT			0x5E
+#define	DA9211_REG_BUCK_ILIM			0xD0
+#define	DA9211_REG_BUCKA_CONF			0xD1
+#define	DA9211_REG_BUCKB_CONF			0xD2
+#define	DA9211_REG_BUCK_CONF			0xD3
+#define	DA9211_REG_VBACKA_MAX			0xD5
+#define	DA9211_REG_VBACKB_MAX			0xD6
+#define	DA9211_REG_VBUCKA_A				0xD7
+#define	DA9211_REG_VBUCKA_B				0xD8
+#define	DA9211_REG_VBUCKB_A				0xD9
+#define	DA9211_REG_VBUCKB_B				0xDA
+
+/* I2C Interface Settings */
+#define DA9211_REG_INTERFACE			(0x105 - 0x100)
+
+/* BUCK Phase Selection*/
+#define DA9211_REG_CONTROL_E			(0x147 - 0x100)
+
+/*
+ * Registers bits
+ */
+/* DA9211_REG_PAGE_CON (addr=0x00) */
+#define	DA9211_REG_PAGE_SHIFT			0
+#define	DA9211_REG_PAGE_MASK			0x0F
+/* On I2C registers 0x00 - 0xFF */
+#define	DA9211_REG_PAGE0			0
+/* On I2C registers 0x100 - 0x1FF */
+#define	DA9211_REG_PAGE2			2
+#define	DA9211_PAGE_WRITE_MODE			0x00
+#define	DA9211_REPEAT_WRITE_MODE		0x40
+#define	DA9211_PAGE_REVERT			0x80
+
+/* DA9211_REG_STATUS_A (addr=0x50) */
+#define	DA9211_GPI0				0x01
+#define	DA9211_GPI1				0x02
+#define	DA9211_GPI2				0x04
+#define	DA9211_GPI3				0x08
+#define	DA9211_GPI4				0x10
+
+/* DA9211_REG_EVENT_A (addr=0x52) */
+#define	DA9211_E_GPI0				0x01
+#define	DA9211_E_GPI1				0x02
+#define	DA9211_E_GPI2				0x04
+#define	DA9211_E_GPI3				0x08
+#define	DA9211_E_GPI4				0x10
+#define	DA9211_E_UVLO_IO			0x40
+
+/* DA9211_REG_EVENT_B (addr=0x53) */
+#define	DA9211_E_PWRGOOD_A			0x01
+#define	DA9211_E_PWRGOOD_B			0x02
+#define	DA9211_E_TEMP_WARN			0x04
+#define	DA9211_E_TEMP_CRIT			0x08
+#define	DA9211_E_OV_CURR_A			0x10
+#define	DA9211_E_OV_CURR_B			0x20
+
+/* DA9211_REG_MASK_A (addr=0x54) */
+#define	DA9211_M_GPI0				0x01
+#define	DA9211_M_GPI1				0x02
+#define	DA9211_M_GPI2				0x04
+#define	DA9211_M_GPI3				0x08
+#define	DA9211_M_GPI4				0x10
+#define	DA9211_M_UVLO_IO			0x40
+
+/* DA9211_REG_MASK_B (addr=0x55) */
+#define	DA9211_M_PWRGOOD_A			0x01
+#define	DA9211_M_PWRGOOD_B			0x02
+#define	DA9211_M_TEMP_WARN			0x04
+#define	DA9211_M_TEMP_CRIT			0x08
+#define	DA9211_M_OV_CURR_A			0x10
+#define	DA9211_M_OV_CURR_B			0x20
+
+/* DA9211_REG_CONTROL_A (addr=0x56) */
+#define	DA9211_DEBOUNCING_SHIFT		0
+#define	DA9211_DEBOUNCING_MASK		0x07
+#define	DA9211_SLEW_RATE_SHIFT		3
+#define	DA9211_SLEW_RATE_A_MASK		0x18
+#define	DA9211_SLEW_RATE_B_SHIFT	5
+#define	DA9211_SLEW_RATE_B_MASK		0x60
+#define	DA9211_V_LOCK				0x80
+
+/* DA9211_REG_GPIO_0_1 (addr=0x58) */
+#define	DA9211_GPIO0_PIN_SHIFT		0
+#define	DA9211_GPIO0_PIN_MASK		0x03
+#define	DA9211_GPIO0_PIN_GPI		0x00
+#define	DA9211_GPIO0_PIN_GPO_OD		0x02
+#define	DA9211_GPIO0_PIN_GPO		0x03
+#define	DA9211_GPIO0_TYPE			0x04
+#define	DA9211_GPIO0_TYPE_GPI		0x00
+#define	DA9211_GPIO0_TYPE_GPO		0x04
+#define	DA9211_GPIO0_MODE			0x08
+#define	DA9211_GPIO1_PIN_SHIFT		4
+#define	DA9211_GPIO1_PIN_MASK		0x30
+#define	DA9211_GPIO1_PIN_GPI		0x00
+#define	DA9211_GPIO1_PIN_VERROR		0x10
+#define	DA9211_GPIO1_PIN_GPO_OD		0x20
+#define	DA9211_GPIO1_PIN_GPO		0x30
+#define	DA9211_GPIO1_TYPE_SHIFT		0x40
+#define	DA9211_GPIO1_TYPE_GPI		0x00
+#define	DA9211_GPIO1_TYPE_GPO		0x40
+#define	DA9211_GPIO1_MODE			0x80
+
+/* DA9211_REG_GPIO_2_3 (addr=0x59) */
+#define	DA9211_GPIO2_PIN_SHIFT		0
+#define	DA9211_GPIO2_PIN_MASK		0x03
+#define	DA9211_GPIO2_PIN_GPI		0x00
+#define	DA9211_GPIO5_PIN_BUCK_CLK	0x10
+#define	DA9211_GPIO2_PIN_GPO_OD		0x02
+#define	DA9211_GPIO2_PIN_GPO		0x03
+#define	DA9211_GPIO2_TYPE			0x04
+#define	DA9211_GPIO2_TYPE_GPI		0x00
+#define	DA9211_GPIO2_TYPE_GPO		0x04
+#define	DA9211_GPIO2_MODE			0x08
+#define	DA9211_GPIO3_PIN_SHIFT		4
+#define	DA9211_GPIO3_PIN_MASK		0x30
+#define	DA9211_GPIO3_PIN_GPI		0x00
+#define	DA9211_GPIO3_PIN_IERROR		0x10
+#define	DA9211_GPIO3_PIN_GPO_OD		0x20
+#define	DA9211_GPIO3_PIN_GPO		0x30
+#define	DA9211_GPIO3_TYPE_SHIFT		0x40
+#define	DA9211_GPIO3_TYPE_GPI		0x00
+#define	DA9211_GPIO3_TYPE_GPO		0x40
+#define	DA9211_GPIO3_MODE			0x80
+
+/* DA9211_REG_GPIO_4 (addr=0x5A) */
+#define	DA9211_GPIO4_PIN_SHIFT		0
+#define	DA9211_GPIO4_PIN_MASK		0x03
+#define	DA9211_GPIO4_PIN_GPI		0x00
+#define	DA9211_GPIO4_PIN_GPO_OD		0x02
+#define	DA9211_GPIO4_PIN_GPO		0x03
+#define	DA9211_GPIO4_TYPE			0x04
+#define	DA9211_GPIO4_TYPE_GPI		0x00
+#define	DA9211_GPIO4_TYPE_GPO		0x04
+#define	DA9211_GPIO4_MODE			0x08
+
+/* DA9211_REG_BUCKA_CONT (addr=0x5D) */
+#define	DA9211_BUCKA_EN				0x01
+#define	DA9211_BUCKA_GPI_SHIFT		1
+#define DA9211_BUCKA_GPI_MASK		0x06
+#define	DA9211_BUCKA_GPI_OFF		0x00
+#define	DA9211_BUCKA_GPI_GPIO0		0x02
+#define	DA9211_BUCKA_GPI_GPIO1		0x04
+#define	DA9211_BUCKA_GPI_GPIO3		0x06
+#define	DA9211_BUCKA_PD_DIS			0x08
+#define	DA9211_VBUCKA_SEL			0x10
+#define	DA9211_VBUCKA_SEL_A			0x00
+#define	DA9211_VBUCKA_SEL_B			0x10
+#define	DA9211_VBUCKA_GPI_SHIFT		5
+#define	DA9211_VBUCKA_GPI_MASK		0x60
+#define	DA9211_VBUCKA_GPI_OFF		0x00
+#define	DA9211_VBUCKA_GPI_GPIO1		0x20
+#define	DA9211_VBUCKA_GPI_GPIO2		0x40
+#define	DA9211_VBUCKA_GPI_GPIO4		0x60
+
+/* DA9211_REG_BUCKB_CONT (addr=0x5E) */
+#define	DA9211_BUCKB_EN				0x01
+#define	DA9211_BUCKB_GPI_SHIFT		1
+#define DA9211_BUCKB_GPI_MASK		0x06
+#define	DA9211_BUCKB_GPI_OFF		0x00
+#define	DA9211_BUCKB_GPI_GPIO0		0x02
+#define	DA9211_BUCKB_GPI_GPIO1		0x04
+#define	DA9211_BUCKB_GPI_GPIO3		0x06
+#define	DA9211_BUCKB_PD_DIS			0x08
+#define	DA9211_VBUCKB_SEL			0x10
+#define	DA9211_VBUCKB_SEL_A			0x00
+#define	DA9211_VBUCKB_SEL_B			0x10
+#define	DA9211_VBUCKB_GPI_SHIFT		5
+#define	DA9211_VBUCKB_GPI_MASK		0x60
+#define	DA9211_VBUCKB_GPI_OFF		0x00
+#define	DA9211_VBUCKB_GPI_GPIO1		0x20
+#define	DA9211_VBUCKB_GPI_GPIO2		0x40
+#define	DA9211_VBUCKB_GPI_GPIO4		0x60
+
+/* DA9211_REG_BUCK_ILIM (addr=0xD0) */
+#define DA9211_BUCKA_ILIM_SHIFT			0
+#define DA9211_BUCKA_ILIM_MASK			0x0F
+#define DA9211_BUCKB_ILIM_SHIFT			4
+#define DA9211_BUCKB_ILIM_MASK			0xF0
+
+/* DA9211_REG_BUCKA_CONF (addr=0xD1) */
+#define DA9211_BUCKA_MODE_SHIFT			0
+#define DA9211_BUCKA_MODE_MASK			0x03
+#define	DA9211_BUCKA_MODE_MANUAL		0x00
+#define	DA9211_BUCKA_MODE_SLEEP			0x01
+#define	DA9211_BUCKA_MODE_SYNC			0x02
+#define	DA9211_BUCKA_MODE_AUTO			0x03
+#define DA9211_BUCKA_UP_CTRL_SHIFT		2
+#define DA9211_BUCKA_UP_CTRL_MASK		0x1C
+#define DA9211_BUCKA_DOWN_CTRL_SHIFT	5
+#define DA9211_BUCKA_DOWN_CTRL_MASK		0xE0
+
+/* DA9211_REG_BUCKB_CONF (addr=0xD2) */
+#define DA9211_BUCKB_MODE_SHIFT			0
+#define DA9211_BUCKB_MODE_MASK			0x03
+#define	DA9211_BUCKB_MODE_MANUAL		0x00
+#define	DA9211_BUCKB_MODE_SLEEP			0x01
+#define	DA9211_BUCKB_MODE_SYNC			0x02
+#define	DA9211_BUCKB_MODE_AUTO			0x03
+#define DA9211_BUCKB_UP_CTRL_SHIFT		2
+#define DA9211_BUCKB_UP_CTRL_MASK		0x1C
+#define DA9211_BUCKB_DOWN_CTRL_SHIFT	5
+#define DA9211_BUCKB_DOWN_CTRL_MASK		0xE0
+
+/* DA9211_REG_BUCK_CONF (addr=0xD3) */
+#define DA9211_PHASE_SEL_A_SHIFT		0
+#define DA9211_PHASE_SEL_A_MASK			0x03
+#define DA9211_PHASE_SEL_B_SHIFT		2
+#define DA9211_PHASE_SEL_B_MASK			0x04
+#define DA9211_PH_SH_EN_A_SHIFT			3
+#define DA9211_PH_SH_EN_A_MASK			0x08
+#define DA9211_PH_SH_EN_B_SHIFT			4
+#define DA9211_PH_SH_EN_B_MASK			0x10
+
+/* DA9211_REG_VBUCKA_MAX (addr=0xD5) */
+#define DA9211_VBUCKA_BASE_SHIFT		0
+#define DA9211_VBUCKA_BASE_MASK			0x7F
+
+/* DA9211_REG_VBUCKB_MAX (addr=0xD6) */
+#define DA9211_VBUCKB_BASE_SHIFT		0
+#define DA9211_VBUCKB_BASE_MASK			0x7F
+
+/* DA9211_REG_VBUCKA/B_A/B (addr=0xD7/0xD8/0xD9/0xDA) */
+#define DA9211_VBUCK_SHIFT			0
+#define DA9211_VBUCK_MASK			0x7F
+#define DA9211_VBUCK_BIAS			0
+#define DA9211_BUCK_SL				0x80
+
+/* DA9211_REG_INTERFACE (addr=0x105) */
+#define DA9211_IF_BASE_ADDR_SHIFT		4
+#define DA9211_IF_BASE_ADDR_MASK		0xF0
+
+/* DA9211_REG_CONFIG_E (addr=0x147) */
+#define DA9211_SLAVE_SEL			0x40
+
+#endif	/* __DA9211_REGISTERS_H__ */
diff --git a/include/linux/regulator/da9211.h b/include/linux/regulator/da9211.h
new file mode 100644
index 0000000..3575de2
--- /dev/null
+++ b/include/linux/regulator/da9211.h
@@ -0,0 +1,81 @@
+/*
+ * da9211.h - Regulator device driver for DA9211
+ * Copyright (C) 2014  Dialog Semiconductor Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ */
+
+#ifndef __LINUX_REGULATOR_DA9211_H
+#define __LINUX_REGULATOR_DA9211_H
+
+#include <linux/regulator/machine.h>
+
+#define DA9211_MAX_REGULATORS	2
+
+enum da9211_gpio_ren_select {
+	DA9211_REN_NO_GPIO = 0,
+	DA9211_REN_GPIO_0,
+	DA9211_REN_GPIO_1,
+	DA9211_REN_GPIO_3,
+};
+
+enum da9211_gpio_rsel_select {
+	DA9211_RSEL_NO_GPIO = 0,
+	DA9211_RSEL_GPIO_1,
+	DA9211_RSEL_GPIO_2,
+	DA9211_RSEL_GPIO_4,
+};
+
+enum DA9211_IRQ {
+	DA9211_IRQ_EGPI0 = 0,
+	DA9211_IRQ_EGPI1,
+	DA9211_IRQ_EGPI2,
+	DA9211_IRQ_EGPI3,
+	DA9211_IRQ_EGPI4,
+	DA9211_IRQ_EUVLO_IO,
+	DA9211_IRQ_EPWRGOOD_A,
+	DA9211_IRQ_EPWRGOOD_B,
+	DA9211_IRQ_ETEMP_WARN,
+	DA9211_IRQ_ETEMP_CRIT,
+	DA9211_IRQ_EOV_CURR_A,
+	DA9211_IRQ_EOV_CURR_B,
+	DA9211_NUM_IRQ,
+};
+
+struct da9211_buck_data {
+	/* gpio of platform for buck eanble/disable */
+	int gpio_ren;
+
+	/* gpio of platform for buck(a/b) selection */
+	int gpio_rsel;
+
+	/* init state of gpio_ren */
+	int ena_init_state;
+
+	/* gpio of da9211 for buck eanble/disable */
+	enum da9211_gpio_ren_select reg_ren;
+
+	/* gpio of da9211 for buck(a/b) selection */
+	enum da9211_gpio_rsel_select reg_rsel;
+
+	struct regulator_init_data *constraints;
+};
+
+struct da9211_pdata {
+	/*
+	 * Number of buck
+	 * 1 : 4 phase 1 buck
+	 * 2 : 2 phase 2 buck
+	 */
+	int num_buck;
+	struct da9211_buck_data buck_data[DA9211_MAX_REGULATORS];
+};
+#endif
-- 
end-of-patch for regulator: DA9211 : new regulator driver V1


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