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Gmane
From: Jonghwa Lee <jonghwa3.lee <at> samsung.com>
Subject: [PATCH] MFD : add MAX77686 mfd driver
Newsgroups: gmane.linux.kernel
Date: Monday 30th April 2012 08:53:42 UTC (over 4 years ago)
From: Chiwoong byun <[email protected]>

This driver is for MAXIM 77686 mfd chip.
It contains RTC, PMIC on it.
They share same I2C bus and included in this mfd driver.

Signed-off-by: Jonghwa Lee <[email protected]>
Signed-off-by: Kyungmin Park 
Signed-off-by: MyungJoo Ham 
---
 drivers/mfd/Kconfig                  |   11 +
 drivers/mfd/Makefile                 |    1 +
 drivers/mfd/max77686-irq.c           |  343 ++++++++++++++++++++++++++++
 drivers/mfd/max77686.c               |  407
++++++++++++++++++++++++++++++++++
 include/linux/mfd/max77686-private.h |  259 +++++++++++++++++++++
 include/linux/mfd/max77686.h         |  137 ++++++++++++
 6 files changed, 1158 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mfd/max77686-irq.c
 create mode 100644 drivers/mfd/max77686.c
 create mode 100644 include/linux/mfd/max77686-private.h
 create mode 100644 include/linux/mfd/max77686.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 13a1789..998356f 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -441,6 +441,17 @@ config MFD_MAX8998
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_MAX77686
+	bool "Maxim Semiconductor MAX77686 PMIC Support"
+	depends on I2C=y && GENERIC_HARDIRQS
+	select MFD_CORE
+	help
+	  Say yes here to support for Maxim Semiconductor MAX77686.
+	  This is a Power Management IC with RTC on chip.
+	  This driver provides common support for accessing the device;
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 config MFD_S5M_CORE
 	bool "SAMSUNG S5M Series Support"
 	depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ddd9fa7..d93a7a6 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_MFD_MAX8925)	+= max8925.o
 obj-$(CONFIG_MFD_MAX8997)	+= max8997.o max8997-irq.o
 obj-$(CONFIG_MFD_MAX8998)	+= max8998.o max8998-irq.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o max77693-irq.o
+obj-$(CONFIG_MFD_MAX77693)	+= max77686.o max77686-irq.o
 
 pcf50633-objs			:= pcf50633-core.o pcf50633-irq.o
 obj-$(CONFIG_MFD_PCF50633)	+= pcf50633.o
diff --git a/drivers/mfd/max77686-irq.c b/drivers/mfd/max77686-irq.c
new file mode 100644
index 0000000..c086da3
--- /dev/null
+++ b/drivers/mfd/max77686-irq.c
@@ -0,0 +1,343 @@
+/*
+ * max77686-irq.c - Interrupt controller support for MAX77686
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ * Chiwoong Byun <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 
USA
+ *
+ * This driver is based on max8997-irq.c
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#undef MAX77686_IRQ_TEST
+
+enum {
+	MAX77686_DEBUG_IRQ_INFO = 1 << 0,
+	MAX77686_DEBUG_IRQ_MASK = 1 << 1,
+	MAX77686_DEBUG_IRQ_INT = 1 << 2,
+};
+
+static int debug_mask = MAX77686_DEBUG_IRQ_INFO | MAX77686_DEBUG_IRQ_MASK
|
+						MAX77686_DEBUG_IRQ_INT;
+
+static const u8 max77686_mask_reg[] = {
+	[PMIC_INT1] = MAX77686_REG_INT1MSK,
+	[PMIC_INT2] = MAX77686_REG_INT2MSK,
+	[RTC_INT] = MAX77686_RTC_INTM,
+};
+
+static struct i2c_client *max77686_get_i2c(struct max77686_dev *max77686,
+				enum max77686_irq_source src)
+{
+	switch (src) {
+	case PMIC_INT1 ... PMIC_INT2:
+		return max77686->i2c;
+	case RTC_INT:
+		return max77686->rtc;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+}
+
+struct max77686_irq_data {
+	int mask;
+	enum max77686_irq_source group;
+};
+
+static const struct max77686_irq_data max77686_irqs[] = {
+	[MAX77686_PMICIRQ_PWRONF] = { .group = PMIC_INT1, .mask = 1 << 0 },
+	[MAX77686_PMICIRQ_PWRONR] = { .group = PMIC_INT1, .mask = 1 << 1 },
+	[MAX77686_PMICIRQ_JIGONBF] = { .group = PMIC_INT1, .mask = 1 << 2 },
+	[MAX77686_PMICIRQ_JIGONBR] = { .group = PMIC_INT1, .mask = 1 << 3 },
+	[MAX77686_PMICIRQ_ACOKBF] = { .group = PMIC_INT1, .mask = 1 << 4 },
+	[MAX77686_PMICIRQ_ACOKBR] = { .group = PMIC_INT1, .mask = 1 << 5 },
+	[MAX77686_PMICIRQ_ONKEY1S] = { .group = PMIC_INT1, .mask = 1 << 6 },
+	[MAX77686_PMICIRQ_MRSTB] = { .group = PMIC_INT1, .mask = 1 << 7 },
+	[MAX77686_PMICIRQ_140C] = { .group = PMIC_INT2, .mask = 1 << 0 },
+	[MAX77686_PMICIRQ_120C] = { .group = PMIC_INT2, .mask = 1 << 1 },
+	[MAX77686_RTCIRQ_RTC60S] = { .group = RTC_INT, .mask = 1 << 0 },
+	[MAX77686_RTCIRQ_RTCA1] = { .group = RTC_INT, .mask = 1 << 1 },
+	[MAX77686_RTCIRQ_RTCA2] = { .group = RTC_INT, .mask = 1 << 2 },
+	[MAX77686_RTCIRQ_SMPL] = { .group = RTC_INT, .mask = 1 << 3 },
+	[MAX77686_RTCIRQ_RTC1S]	= { .group = RTC_INT, .mask = 1 << 4 },
+	[MAX77686_RTCIRQ_WTSR] = { .group = RTC_INT, .mask = 1 << 5 },
+};
+
+static void max77686_irq_lock(struct irq_data *data)
+{
+	struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+		pr_debug("%s\n", __func__);
+
+	mutex_lock(&max77686->irqlock);
+}
+
+static void max77686_irq_sync_unlock(struct irq_data *data)
+{
+	struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+	int i;
+
+	for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
+		u8 mask_reg = max77686_mask_reg[i];
+		struct i2c_client *i2c = max77686_get_i2c(max77686, i);
+
+		if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+			pr_debug("%s: mask_reg[%d]=0x%x, cur=0x%x\n", __func__,
+				 i, mask_reg, max77686->irq_masks_cur[i]);
+
+		if (mask_reg == MAX77686_REG_INVALID ||
+				IS_ERR_OR_NULL(i2c))
+			continue;
+
+		max77686->irq_masks_cache[i] = max77686->irq_masks_cur[i];
+
+		max77686_write_reg(i2c, max77686_mask_reg[i],
+				max77686->irq_masks_cur[i]);
+	}
+
+	mutex_unlock(&max77686->irqlock);
+}
+
+static const inline struct max77686_irq_data *
+irq_to_max77686_irq(struct max77686_dev *max77686, int irq)
+{
+	return &max77686_irqs[irq - max77686->irq_base];
+}
+
+static void max77686_irq_mask(struct irq_data *data)
+{
+	struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+	const struct max77686_irq_data *irq_data = irq_to_max77686_irq(max77686,
+							       data->irq);
+
+	max77686->irq_masks_cur[irq_data->group] |= irq_data->mask;
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+		pr_info("%s: group=%d, cur=0x%x\n",
+			__func__, irq_data->group,
+			max77686->irq_masks_cur[irq_data->group]);
+}
+
+static void max77686_irq_unmask(struct irq_data *data)
+{
+	struct max77686_dev *max77686 = irq_get_chip_data(data->irq);
+	const struct max77686_irq_data *irq_data = irq_to_max77686_irq(max77686,
+							       data->irq);
+
+	max77686->irq_masks_cur[irq_data->group] &= ~irq_data->mask;
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_MASK)
+		pr_info("%s: group=%d, cur=0x%x\n",
+			__func__, irq_data->group,
+			max77686->irq_masks_cur[irq_data->group]);
+}
+
+static struct irq_chip max77686_irq_chip = {
+	.name			= "max77686",
+	.irq_bus_lock		= max77686_irq_lock,
+	.irq_bus_sync_unlock	= max77686_irq_sync_unlock,
+	.irq_mask		= max77686_irq_mask,
+	.irq_unmask		= max77686_irq_unmask,
+};
+
+static irqreturn_t max77686_irq_thread(int irq, void *data)
+{
+	struct max77686_dev *max77686 = data;
+	u8 irq_reg[MAX77686_IRQ_GROUP_NR] = {};
+	u8 irq_src;
+	int ret;
+	int i;
+
+	ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INTSRC, &irq_src);
+	if (ret < 0) {
+		dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+				ret);
+		return IRQ_NONE;
+	}
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+		pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
+
+	/* MAX77686_IRQSRC_RTC may be set even if there are pending at INT1/2 */
+	ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INT1, &irq_reg[0]);
+	ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INT2, &irq_reg[1]);
+	if (ret < 0) {
+		dev_err(max77686->dev, "Failed to read pmic interrupt: %d\n",
+				ret);
+		return IRQ_NONE;
+	}
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+		pr_info("%s: int1=0x%x, int2=0x%x\n",
+			__func__, irq_reg[PMIC_INT1], irq_reg[PMIC_INT2]);
+
+	if (irq_src & MAX77686_IRQSRC_RTC) {
+#ifdef CONFIG_RTC_DRV_MAX77686
+		ret = max77686_read_reg(max77686->rtc, MAX77686_RTC_INT,
+					 &irq_reg[RTC_INT]);
+#else
+		ret = -ENODEV;
+#endif
+		if (ret < 0) {
+			dev_err(max77686->dev, "Failed to read rtc interrupt: %d\n",
+					ret);
+			return IRQ_NONE;
+		}
+
+		if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+			pr_info("%s: rtc int=0x%x\n", __func__,
+						irq_reg[RTC_INT]);
+	}
+
+	for (i = 0; i < MAX77686_IRQ_NR; i++) {
+		if (irq_reg[max77686_irqs[i].group] & max77686_irqs[i].mask)
+			handle_nested_irq(max77686->irq_base + i);
+	}
+
+	return IRQ_HANDLED;
+}
+
+int max77686_irq_resume(struct max77686_dev *max77686)
+{
+	if (max77686->irq && max77686->irq_base)
+		max77686_irq_thread(max77686->irq_base, max77686);
+	return 0;
+}
+
+int max77686_irq_init(struct max77686_dev *max77686)
+{
+	int i;
+	int cur_irq;
+	int ret;
+	int val;
+#ifdef MAX77686_IRQ_TEST
+	u8 irq_reg[6] = { };
+	u8 irq_src;
+#endif
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
+		pr_info("%s+\n", __func__);
+
+	if (!max77686->irq_gpio) {
+		dev_warn(max77686->dev, "No interrupt gpio specified.\n");
+		max77686->irq_base = 0;
+		return 0;
+	}
+
+	if (!max77686->irq_base) {
+		dev_err(max77686->dev, "No interrupt base specified.\n");
+		return 0;
+	}
+
+	mutex_init(&max77686->irqlock);
+
+	max77686->irq = gpio_to_irq(max77686->irq_gpio);
+	ret = gpio_request(max77686->irq_gpio, "pmic_irq");
+	if (ret < 0 && ret != -EBUSY) {
+		dev_err(max77686->dev,
+			"Failed to request gpio %d with ret: %d\n",
+			max77686->irq_gpio, ret);
+		return IRQ_NONE;
+	}
+	if (ret == -EBUSY)
+		dev_warn(max77686->dev, "gpio pmic_irq is already requested\n");
+
+	gpio_direction_input(max77686->irq_gpio);
+	val = gpio_get_value(max77686->irq_gpio);
+	gpio_free(max77686->irq_gpio);
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_INT)
+		pr_info("%s: gpio_irq=%x\n", __func__, val);
+
+#ifdef MAX77686_IRQ_TEST
+	ret = max77686_read_reg(max77686->i2c, MAX77686_REG_INTSRC, &irq_src);
+	if (ret < 0) {
+		dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+			ret);
+		return IRQ_NONE;
+	}
+
+	pr_info("%s: irq_src=0x%x\n", __func__, irq_src);
+
+	ret = max77686_bulk_read(max77686->i2c, MAX77686_REG_INT1, 6, irq_reg);
+	if (ret < 0) {
+		dev_err(max77686->dev, "Failed to read interrupt source: %d\n",
+			ret);
+		return IRQ_NONE;
+	}
+
+	for (i = 0; i < 6; i++)
+		pr_info("%s: i[%d]=0x%x\n", __func__, i, irq_reg[i]);
+#endif /* MAX77686_IRQ_TEST */
+
+	/* Mask individual interrupt sources */
+	for (i = 0; i < MAX77686_IRQ_GROUP_NR; i++) {
+		struct i2c_client *i2c;
+
+		max77686->irq_masks_cur[i] = 0xff;
+		max77686->irq_masks_cache[i] = 0xff;
+		i2c = max77686_get_i2c(max77686, i);
+
+		if (IS_ERR_OR_NULL(i2c))
+			continue;
+		if (max77686_mask_reg[i] == MAX77686_REG_INVALID)
+			continue;
+
+		max77686_write_reg(i2c, max77686_mask_reg[i], 0xff);
+	}
+
+	/* Register with genirq */
+	for (i = 0; i < MAX77686_IRQ_NR; i++) {
+		cur_irq = i + max77686->irq_base;
+		irq_set_chip_data(cur_irq, max77686);
+		irq_set_chip_and_handler(cur_irq, &max77686_irq_chip,
+					 handle_edge_irq);
+		irq_set_nested_thread(cur_irq, 1);
+#ifdef CONFIG_ARM
+		set_irq_flags(cur_irq, IRQF_VALID);
+#else
+		irq_set_noprobe(cur_irq);
+#endif
+	}
+
+	ret = request_threaded_irq(max77686->irq, NULL, max77686_irq_thread,
+				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				   "max77686-irq", max77686);
+
+	if (ret) {
+		dev_err(max77686->dev, "Failed to request IRQ %d: %d\n",
+			max77686->irq, ret);
+		return ret;
+	}
+
+	if (debug_mask & MAX77686_DEBUG_IRQ_INFO)
+		pr_info("%s-\n", __func__);
+
+	return 0;
+}
+
+void max77686_irq_exit(struct max77686_dev *max77686)
+{
+	if (max77686->irq)
+		free_irq(max77686->irq, max77686);
+}
diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
new file mode 100644
index 0000000..77b325c
--- /dev/null
+++ b/drivers/mfd/max77686.c
@@ -0,0 +1,407 @@
+/*
+ * max77686.c - mfd core driver for the Maxim 77686
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Chiwoong Byun <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 
USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#define I2C_ADDR_RTC	(0x0C >> 1)
+
+static struct mfd_cell max77686_devs[] = {
+	{ .name = "max77686-pmic", },
+#ifdef CONFIG_RTC_DRV_MAX77686
+	{ .name = "max77686-rtc", },
+#endif
+};
+
+int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_read_byte_data(i2c, reg);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	ret &= 0xff;
+	*dest = ret;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_read_reg);
+
+int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_bulk_read);
+
+int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_write_byte_data(i2c, reg, value);
+	mutex_unlock(&max77686->iolock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(max77686_write_reg);
+
+int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8
*buf)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_bulk_write);
+
+int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_read_byte_data(i2c, reg);
+	if (ret >= 0) {
+		u8 old_val = ret & 0xff;
+		u8 new_val = (val & mask) | (old_val & (~mask));
+		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
+	}
+	mutex_unlock(&max77686->iolock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(max77686_update_reg);
+
+static int max77686_i2c_probe(struct i2c_client *i2c,
+			      const struct i2c_device_id *id)
+{
+	struct max77686_dev *max77686;
+	struct max77686_platform_data *pdata = i2c->dev.platform_data;
+	u8 data;
+	int ret = 0;
+
+	max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL);
+	if (max77686 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max77686);
+	max77686->dev = &i2c->dev;
+	max77686->i2c = i2c;
+	max77686->type = id->driver_data;
+
+	if (!pdata) {
+		ret = -EIO;
+		goto err;
+	}
+
+	max77686->wakeup = pdata->wakeup;
+	max77686->irq_gpio = pdata->irq_gpio;
+	max77686->irq_base = pdata->irq_base;
+	max77686->wtsr_smpl = pdata->wtsr_smpl;
+
+	mutex_init(&max77686->iolock);
+
+	if (max77686_read_reg(i2c, MAX77686_REG_DEVICE_ID, &data) < 0) {
+		dev_err(max77686->dev,
+			"device not found on this channel (this is not an error)\n");
+		ret = -ENODEV;
+		goto err;
+	} else
+		dev_info(max77686->dev, "device found\n");
+
+#ifdef CONFIG_RTC_DRV_MAX77686
+	max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+	i2c_set_clientdata(max77686->rtc, max77686);
+#endif
+
+	max77686_irq_init(max77686);
+
+	ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
+			      ARRAY_SIZE(max77686_devs), NULL, 0);
+
+	if (ret < 0)
+		goto err_mfd;
+
+	device_init_wakeup(max77686->dev, pdata->wakeup);
+
+	return ret;
+
+err_mfd:
+	mfd_remove_devices(max77686->dev);
+#ifdef CONFIG_RTC_DRV_MAX77686
+	i2c_unregister_device(max77686->rtc);
+#endif
+err:
+	kfree(max77686);
+	return ret;
+}
+
+static int max77686_i2c_remove(struct i2c_client *i2c)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(max77686->dev);
+#ifdef CONFIG_RTC_DRV_MAX77686
+	i2c_unregister_device(max77686->rtc);
+#endif
+	kfree(max77686);
+
+	return 0;
+}
+
+static const struct i2c_device_id max77686_i2c_id[] = {
+	{ "max77686", TYPE_MAX77686 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
+
+#ifdef CONFIG_PM
+static int max77686_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	disable_irq(max77686->irq);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(max77686->irq);
+
+	return 0;
+}
+
+static int max77686_resume(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(max77686->irq);
+
+	enable_irq(max77686->irq);
+
+	return max77686_irq_resume(max77686);
+}
+#else
+#define max77686_suspend	NULL
+#define max77686_resume		NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_HIBERNATION
+
+u8 max77686_dumpaddr_pmic[] = {
+	MAX77686_REG_INT1MSK,
+	MAX77686_REG_INT2MSK,
+	MAX77686_REG_ONOFF_DELAY,
+	MAX77686_REG_MRSTB	,
+	/* Reserved: 0x0B-0x0F */
+	MAX77686_REG_BUCK1CTRL,
+	MAX77686_REG_BUCK1OUT,
+	MAX77686_REG_BUCK2CTRL1,
+	MAX77686_REG_BUCK234FREQ,
+	MAX77686_REG_BUCK2DVS1,
+	MAX77686_REG_BUCK2DVS2,
+	MAX77686_REG_BUCK2DVS3,
+	MAX77686_REG_BUCK2DVS4,
+	MAX77686_REG_BUCK2DVS5,
+	MAX77686_REG_BUCK2DVS6,
+	MAX77686_REG_BUCK2DVS7,
+	MAX77686_REG_BUCK2DVS8,
+	MAX77686_REG_BUCK3CTRL1,
+	/* Reserved: 0x1D */
+	MAX77686_REG_BUCK3DVS1,
+	MAX77686_REG_BUCK3DVS2,
+	MAX77686_REG_BUCK3DVS3,
+	MAX77686_REG_BUCK3DVS4,
+	MAX77686_REG_BUCK3DVS5,
+	MAX77686_REG_BUCK3DVS6,
+	MAX77686_REG_BUCK3DVS7,
+	MAX77686_REG_BUCK3DVS8,
+	MAX77686_REG_BUCK4CTRL1,
+	/* Reserved: 0x27 */
+	MAX77686_REG_BUCK4DVS1,
+	MAX77686_REG_BUCK4DVS2,
+	MAX77686_REG_BUCK4DVS3,
+	MAX77686_REG_BUCK4DVS4,
+	MAX77686_REG_BUCK4DVS5,
+	MAX77686_REG_BUCK4DVS6,
+	MAX77686_REG_BUCK4DVS7,
+	MAX77686_REG_BUCK4DVS8,
+	MAX77686_REG_BUCK5CTRL,
+	MAX77686_REG_BUCK5OUT,
+	MAX77686_REG_BUCK6CTRL,
+	MAX77686_REG_BUCK6OUT,
+	MAX77686_REG_BUCK7CTRL,
+	MAX77686_REG_BUCK7OUT,
+	MAX77686_REG_BUCK8CTRL,
+	MAX77686_REG_BUCK8OUT,
+	MAX77686_REG_BUCK9CTRL,
+	MAX77686_REG_BUCK9OUT,
+	/* Reserved: 0x3A-0x3F */
+	MAX77686_REG_LDO1CTRL1	,
+	MAX77686_REG_LDO2CTRL1	,
+	MAX77686_REG_LDO3CTRL1	,
+	MAX77686_REG_LDO4CTRL1	,
+	MAX77686_REG_LDO5CTRL1	,
+	MAX77686_REG_LDO6CTRL1,
+	MAX77686_REG_LDO7CTRL1	,
+	MAX77686_REG_LDO8CTRL1	,
+	MAX77686_REG_LDO9CTRL1	,
+	MAX77686_REG_LDO10CTRL1,
+	MAX77686_REG_LDO11CTRL1,
+	MAX77686_REG_LDO12CTRL1,
+	MAX77686_REG_LDO13CTRL1,
+	MAX77686_REG_LDO14CTRL1,
+	MAX77686_REG_LDO15CTRL1,
+	MAX77686_REG_LDO16CTRL1,
+	MAX77686_REG_LDO17CTRL1,
+	MAX77686_REG_LDO18CTRL1,
+	MAX77686_REG_LDO19CTRL1,
+	MAX77686_REG_LDO20CTRL1,
+	MAX77686_REG_LDO21CTRL1,
+	MAX77686_REG_LDO22CTRL1,
+	MAX77686_REG_LDO23CTRL1,
+	MAX77686_REG_LDO24CTRL1,
+	MAX77686_REG_LDO25CTRL1,
+	MAX77686_REG_LDO26CTRL1,
+	/* Reserved: 0x5A-0x5F */
+	MAX77686_REG_LDO1CTRL2	,
+	MAX77686_REG_LDO2CTRL2	,
+	MAX77686_REG_LDO3CTRL2	,
+	MAX77686_REG_LDO4CTRL2	,
+	MAX77686_REG_LDO5CTRL2	,
+	MAX77686_REG_LDO6CTRL2,
+	MAX77686_REG_LDO7CTRL2	,
+	MAX77686_REG_LDO8CTRL2	,
+	MAX77686_REG_LDO9CTRL2	,
+	MAX77686_REG_LDO10CTRL2,
+	MAX77686_REG_LDO11CTRL2,
+	MAX77686_REG_LDO12CTRL2,
+	MAX77686_REG_LDO13CTRL2,
+	MAX77686_REG_LDO14CTRL2,
+	MAX77686_REG_LDO15CTRL2,
+	MAX77686_REG_LDO16CTRL2,
+	MAX77686_REG_LDO17CTRL2,
+	MAX77686_REG_LDO18CTRL2,
+	MAX77686_REG_LDO19CTRL2,
+	MAX77686_REG_LDO20CTRL2,
+	MAX77686_REG_LDO21CTRL2,
+	MAX77686_REG_LDO22CTRL2,
+	MAX77686_REG_LDO23CTRL2,
+	MAX77686_REG_LDO24CTRL2,
+	MAX77686_REG_LDO25CTRL2,
+	MAX77686_REG_LDO26CTRL2,
+	MAX77686_REG_BBAT_CHG,
+	MAX77686_REG_32KHZ,
+};
+
+static int max77686_freeze(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
+		max77686_read_reg(i2c, max77686_dumpaddr_pmic[i],
+				&max77686->reg_dump[i]);
+
+	disable_irq(max77686->irq);
+
+	return 0;
+}
+
+static int max77686_restore(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int i;
+
+	enable_irq(max77686->irq);
+
+	for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
+		max77686_write_reg(i2c, max77686_dumpaddr_pmic[i],
+				max77686->reg_dump[i]);
+
+	return 0;
+}
+#endif
+
+const struct dev_pm_ops max77686_pm = {
+	.suspend = max77686_suspend,
+	.resume = max77686_resume,
+#ifdef CONFIG_HIBERNATION
+	.freeze =  max77686_freeze,
+	.thaw = max77686_restore,
+	.restore = max77686_restore,
+#endif
+};
+
+static struct i2c_driver max77686_i2c_driver = {
+	.driver = {
+		.name = "max77686",
+		.owner = THIS_MODULE,
+		.pm = &max77686_pm,
+	},
+	.probe = max77686_i2c_probe,
+	.remove = max77686_i2c_remove,
+	.id_table = max77686_i2c_id,
+};
+
+static int __init max77686_i2c_init(void)
+{
+	return i2c_add_driver(&max77686_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77686_i2c_init);
+
+static void __exit max77686_i2c_exit(void)
+{
+	i2c_del_driver(&max77686_i2c_driver);
+}
+module_exit(max77686_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
+MODULE_AUTHOR("Chiwoong Byun <[email protected]>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77686-private.h
b/include/linux/mfd/max77686-private.h
new file mode 100644
index 0000000..a44a743
--- /dev/null
+++ b/include/linux/mfd/max77686-private.h
@@ -0,0 +1,259 @@
+/*
+ * max77686.h - Voltage regulator driver for the Maxim 77686
+ *
+ *  Copyright (C) 2012 Samsung Electrnoics
+ *  Chiwoong Byun <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 
USA
+ */
+
+#ifndef __LINUX_MFD_MAX77686_PRIV_H
+#define __LINUX_MFD_MAX77686_PRIV_H
+
+#include 
+
+#define MAX77686_REG_INVALID		(0xff)
+
+enum max77686_pmic_reg {
+	MAX77686_REG_DEVICE_ID		= 0x00,
+	MAX77686_REG_INTSRC		= 0x01,
+	MAX77686_REG_INT1		= 0x02,
+	MAX77686_REG_INT2		= 0x03,
+
+	MAX77686_REG_INT1MSK		= 0x04,
+	MAX77686_REG_INT2MSK		= 0x05,
+
+	MAX77686_REG_STATUS1		= 0x06,
+	MAX77686_REG_STATUS2		= 0x07,
+
+	MAX77686_REG_PWRON		= 0x08,
+	MAX77686_REG_ONOFF_DELAY	= 0x09,
+	MAX77686_REG_MRSTB		= 0x0A,
+	/* Reserved: 0x0B-0x0F */
+
+	MAX77686_REG_BUCK1CTRL		= 0x10,
+	MAX77686_REG_BUCK1OUT		= 0x11,
+	MAX77686_REG_BUCK2CTRL1		= 0x12,
+	MAX77686_REG_BUCK234FREQ	= 0x13,
+	MAX77686_REG_BUCK2DVS1		= 0x14,
+	MAX77686_REG_BUCK2DVS2		= 0x15,
+	MAX77686_REG_BUCK2DVS3		= 0x16,
+	MAX77686_REG_BUCK2DVS4		= 0x17,
+	MAX77686_REG_BUCK2DVS5		= 0x18,
+	MAX77686_REG_BUCK2DVS6		= 0x19,
+	MAX77686_REG_BUCK2DVS7		= 0x1A,
+	MAX77686_REG_BUCK2DVS8		= 0x1B,
+	MAX77686_REG_BUCK3CTRL1		= 0x1C,
+	/* Reserved: 0x1D */
+	MAX77686_REG_BUCK3DVS1		= 0x1E,
+	MAX77686_REG_BUCK3DVS2		= 0x1F,
+	MAX77686_REG_BUCK3DVS3		= 0x20,
+	MAX77686_REG_BUCK3DVS4		= 0x21,
+	MAX77686_REG_BUCK3DVS5		= 0x22,
+	MAX77686_REG_BUCK3DVS6		= 0x23,
+	MAX77686_REG_BUCK3DVS7		= 0x24,
+	MAX77686_REG_BUCK3DVS8		= 0x25,
+	MAX77686_REG_BUCK4CTRL1		= 0x26,
+	/* Reserved: 0x27 */
+	MAX77686_REG_BUCK4DVS1		= 0x28,
+	MAX77686_REG_BUCK4DVS2		= 0x29,
+	MAX77686_REG_BUCK4DVS3		= 0x2A,
+	MAX77686_REG_BUCK4DVS4		= 0x2B,
+	MAX77686_REG_BUCK4DVS5		= 0x2C,
+	MAX77686_REG_BUCK4DVS6		= 0x2D,
+	MAX77686_REG_BUCK4DVS7		= 0x2E,
+	MAX77686_REG_BUCK4DVS8		= 0x2F,
+	MAX77686_REG_BUCK5CTRL		= 0x30,
+	MAX77686_REG_BUCK5OUT		= 0x31,
+	MAX77686_REG_BUCK6CTRL		= 0x32,
+	MAX77686_REG_BUCK6OUT		= 0x33,
+	MAX77686_REG_BUCK7CTRL		= 0x34,
+	MAX77686_REG_BUCK7OUT		= 0x35,
+	MAX77686_REG_BUCK8CTRL		= 0x36,
+	MAX77686_REG_BUCK8OUT		= 0x37,
+	MAX77686_REG_BUCK9CTRL		= 0x38,
+	MAX77686_REG_BUCK9OUT		= 0x39,
+	/* Reserved: 0x3A-0x3F */
+
+	MAX77686_REG_LDO1CTRL1		= 0x40,
+	MAX77686_REG_LDO2CTRL1		= 0x41,
+	MAX77686_REG_LDO3CTRL1		= 0x42,
+	MAX77686_REG_LDO4CTRL1		= 0x43,
+	MAX77686_REG_LDO5CTRL1		= 0x44,
+	MAX77686_REG_LDO6CTRL1		= 0x45,
+	MAX77686_REG_LDO7CTRL1		= 0x46,
+	MAX77686_REG_LDO8CTRL1		= 0x47,
+	MAX77686_REG_LDO9CTRL1		= 0x48,
+	MAX77686_REG_LDO10CTRL1		= 0x49,
+	MAX77686_REG_LDO11CTRL1		= 0x4A,
+	MAX77686_REG_LDO12CTRL1		= 0x4B,
+	MAX77686_REG_LDO13CTRL1		= 0x4C,
+	MAX77686_REG_LDO14CTRL1		= 0x4D,
+	MAX77686_REG_LDO15CTRL1		= 0x4E,
+	MAX77686_REG_LDO16CTRL1		= 0x4F,
+	MAX77686_REG_LDO17CTRL1		= 0x50,
+	MAX77686_REG_LDO18CTRL1		= 0x51,
+	MAX77686_REG_LDO19CTRL1		= 0x52,
+	MAX77686_REG_LDO20CTRL1		= 0x53,
+	MAX77686_REG_LDO21CTRL1		= 0x54,
+	MAX77686_REG_LDO22CTRL1		= 0x55,
+	MAX77686_REG_LDO23CTRL1		= 0x56,
+	MAX77686_REG_LDO24CTRL1		= 0x57,
+	MAX77686_REG_LDO25CTRL1		= 0x58,
+	MAX77686_REG_LDO26CTRL1		= 0x59,
+	/* Reserved: 0x5A-0x5F */
+	MAX77686_REG_LDO1CTRL2		= 0x60,
+	MAX77686_REG_LDO2CTRL2		= 0x61,
+	MAX77686_REG_LDO3CTRL2		= 0x62,
+	MAX77686_REG_LDO4CTRL2		= 0x63,
+	MAX77686_REG_LDO5CTRL2		= 0x64,
+	MAX77686_REG_LDO6CTRL2		= 0x65,
+	MAX77686_REG_LDO7CTRL2		= 0x66,
+	MAX77686_REG_LDO8CTRL2		= 0x67,
+	MAX77686_REG_LDO9CTRL2		= 0x68,
+	MAX77686_REG_LDO10CTRL2		= 0x69,
+	MAX77686_REG_LDO11CTRL2		= 0x6A,
+	MAX77686_REG_LDO12CTRL2		= 0x6B,
+	MAX77686_REG_LDO13CTRL2		= 0x6C,
+	MAX77686_REG_LDO14CTRL2		= 0x6D,
+	MAX77686_REG_LDO15CTRL2		= 0x6E,
+	MAX77686_REG_LDO16CTRL2		= 0x6F,
+	MAX77686_REG_LDO17CTRL2		= 0x70,
+	MAX77686_REG_LDO18CTRL2		= 0x71,
+	MAX77686_REG_LDO19CTRL2		= 0x72,
+	MAX77686_REG_LDO20CTRL2		= 0x73,
+	MAX77686_REG_LDO21CTRL2		= 0x74,
+	MAX77686_REG_LDO22CTRL2		= 0x75,
+	MAX77686_REG_LDO23CTRL2		= 0x76,
+	MAX77686_REG_LDO24CTRL2		= 0x77,
+	MAX77686_REG_LDO25CTRL2		= 0x78,
+	MAX77686_REG_LDO26CTRL2		= 0x79,
+	/* Reserved: 0x7A-0x7D */
+
+	MAX77686_REG_BBAT_CHG		= 0x7E,
+	MAX77686_REG_32KHZ			= 0x7F,
+
+	MAX77686_REG_PMIC_END		= 0x80,
+};
+
+enum max77686_rtc_reg {
+	MAX77686_RTC_INT			= 0x00,
+	MAX77686_RTC_INTM			= 0x01,
+	MAX77686_RTC_CONTROLM		= 0x02,
+	MAX77686_RTC_CONTROL		= 0x03,
+	MAX77686_RTC_UPDATE0		= 0x04,
+	/* Reserved: 0x5 */
+	MAX77686_WTSR_SMPL_CNTL		= 0x06,
+	MAX77686_RTC_SEC			= 0x07,
+	MAX77686_RTC_MIN			= 0x08,
+	MAX77686_RTC_HOUR			= 0x09,
+	MAX77686_RTC_WEEKDAY		= 0x0A,
+	MAX77686_RTC_MONTH			= 0x0B,
+	MAX77686_RTC_YEAR			= 0x0C,
+	MAX77686_RTC_DATE			= 0x0D,
+	MAX77686_ALARM1_SEC			= 0x0E,
+	MAX77686_ALARM1_MIN			= 0x0F,
+	MAX77686_ALARM1_HOUR		= 0x10,
+	MAX77686_ALARM1_WEEKDAY		= 0x11,
+	MAX77686_ALARM1_MONTH		= 0x12,
+	MAX77686_ALARM1_YEAR		= 0x13,
+	MAX77686_ALARM1_DATE		= 0x14,
+	MAX77686_ALARM2_SEC			= 0x15,
+	MAX77686_ALARM2_MIN			= 0x16,
+	MAX77686_ALARM2_HOUR		= 0x17,
+	MAX77686_ALARM2_WEEKDAY		= 0x18,
+	MAX77686_ALARM2_MONTH		= 0x19,
+	MAX77686_ALARM2_YEAR		= 0x1A,
+	MAX77686_ALARM2_DATE		= 0x1B,
+};
+
+#define MAX77686_IRQSRC_PMIC	(0)
+#define MAX77686_IRQSRC_RTC		(1 << 0)
+
+#define MAX77686_REG_RAMP_RATE_100MV	(0x3<<6)
+#define MAX77686_REG_RAMP_RATE_55MV		(0x2<<6)
+#define MAX77686_REG_RAMP_RATE_27MV		(0x1<<6)
+#define MAX77686_REG_RAMP_RATE_13MV		(0x0<<6)
+
+enum max77686_irq_source {
+	PMIC_INT1 = 0,
+	PMIC_INT2,
+	RTC_INT,
+
+	MAX77686_IRQ_GROUP_NR,
+};
+
+enum max77686_irq {
+	MAX77686_PMICIRQ_PWRONF,
+	MAX77686_PMICIRQ_PWRONR,
+	MAX77686_PMICIRQ_JIGONBF,
+	MAX77686_PMICIRQ_JIGONBR,
+	MAX77686_PMICIRQ_ACOKBF,
+	MAX77686_PMICIRQ_ACOKBR,
+	MAX77686_PMICIRQ_ONKEY1S,
+	MAX77686_PMICIRQ_MRSTB,
+
+	MAX77686_PMICIRQ_140C,
+	MAX77686_PMICIRQ_120C,
+
+	MAX77686_RTCIRQ_RTC60S,
+	MAX77686_RTCIRQ_RTCA1,
+	MAX77686_RTCIRQ_RTCA2,
+	MAX77686_RTCIRQ_SMPL,
+	MAX77686_RTCIRQ_RTC1S,
+	MAX77686_RTCIRQ_WTSR,
+
+	MAX77686_IRQ_NR,
+};
+
+struct max77686_dev {
+	struct device *dev;
+	struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
+	struct i2c_client *rtc; /* slave addr 0x0c */
+	struct mutex iolock;
+
+	int type;
+
+	int irq;
+	int irq_gpio;
+	int irq_base;
+	bool wakeup;
+	struct mutex irqlock;
+	int irq_masks_cur[MAX77686_IRQ_GROUP_NR];
+	int irq_masks_cache[MAX77686_IRQ_GROUP_NR];
+	int wtsr_smpl;
+
+#ifdef CONFIG_HIBERNATION
+	u8 reg_dump[MAX77686_REG_PMIC_END];
+#endif
+};
+
+enum max77686_types {
+	TYPE_MAX77686,
+};
+
+extern int max77686_irq_init(struct max77686_dev *max77686);
+extern void max77686_irq_exit(struct max77686_dev *max77686);
+extern int max77686_irq_resume(struct max77686_dev *max77686);
+
+extern int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
+extern int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count,
+				u8 *buf);
+extern int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
+extern int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count,
+				u8 *buf);
+extern int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8
mask);
+
+#endif /*  __LINUX_MFD_MAX77686_PRIV_H */
diff --git a/include/linux/mfd/max77686.h b/include/linux/mfd/max77686.h
new file mode 100644
index 0000000..9dc81f0
--- /dev/null
+++ b/include/linux/mfd/max77686.h
@@ -0,0 +1,137 @@
+/*
+ * max77686.h - Driver for the Maxim 77686
+ *
+ *  Copyright (C) 2012 Samsung Electrnoics
+ *  Chiwoong Byun <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 
USA
+ *
+ * This driver is based on max8997.h
+ *
+ * MAX77686 has PMIC, RTC devices.
+ * The devices share the same I2C bus and included in
+ * this mfd driver.
+ */
+
+#ifndef __LINUX_MFD_MAX77686_H
+#define __LINUX_MFD_MAX77686_H
+
+#include 
+
+#define MAX77686_SMPL_ENABLE			(0x1)
+#define MAX77686_WTSR_ENABLE			(0x2)
+
+/* MAX77686 regulator IDs */
+enum max77686_regulators {
+	MAX77686_LDO1 = 0,
+	MAX77686_LDO2,
+	MAX77686_LDO3,
+	MAX77686_LDO4,
+	MAX77686_LDO5,
+	MAX77686_LDO6,
+	MAX77686_LDO7,
+	MAX77686_LDO8,
+	MAX77686_LDO9,
+	MAX77686_LDO10,
+	MAX77686_LDO11,
+	MAX77686_LDO12,
+	MAX77686_LDO13,
+	MAX77686_LDO14,
+	MAX77686_LDO15,
+	MAX77686_LDO16,
+	MAX77686_LDO17,
+	MAX77686_LDO18,
+	MAX77686_LDO19,
+	MAX77686_LDO20,
+	MAX77686_LDO21,
+	MAX77686_LDO22,
+	MAX77686_LDO23,
+	MAX77686_LDO24,
+	MAX77686_LDO25,
+	MAX77686_LDO26,
+	MAX77686_BUCK1,
+	MAX77686_BUCK2,
+	MAX77686_BUCK3,
+	MAX77686_BUCK4,
+	MAX77686_BUCK5,
+	MAX77686_BUCK6,
+	MAX77686_BUCK7,
+	MAX77686_BUCK8,
+	MAX77686_BUCK9,
+	MAX77686_EN32KHZ_AP,
+	MAX77686_EN32KHZ_CP,
+	MAX77686_P32KH,
+
+	MAX77686_REG_MAX,
+};
+
+struct max77686_regulator_data {
+	int id;
+	struct regulator_init_data *initdata;
+};
+
+enum max77686_opmode {
+	MAX77686_OPMODE_NORMAL,
+	MAX77686_OPMODE_LP,
+	MAX77686_OPMODE_STANDBY,
+};
+
+enum max77686_ramp_rate {
+	MAX77686_RAMP_RATE_100MV,
+	MAX77686_RAMP_RATE_13MV,
+	MAX77686_RAMP_RATE_27MV,
+	MAX77686_RAMP_RATE_55MV,
+};
+
+struct max77686_opmode_data {
+	int id;
+	int mode;
+};
+
+struct max77686_buck234_gpio_data {
+	int gpio;
+	int data;
+};
+
+struct max77686_platform_data {
+	/* IRQ */
+	int irq_gpio;
+	int irq_base;
+	int ono;
+	int wakeup;
+
+	/* ---- PMIC ---- */
+	struct max77686_regulator_data *regulators;
+	int num_regulators;
+	int has_full_constraints;
+
+	struct max77686_opmode_data *opmode_data;
+	int ramp_rate;
+	int wtsr_smpl;
+
+	/*
+	 * GPIO-DVS feature is not enabled with the current version of
+	 * MAX77686 driver. Buck2/3/4_voltages[0] is used as the default
+	 * voltage at probe. DVS/SELB gpios are set as OUTPUT-LOW.
+	 */
+	struct max77686_buck234_gpio_data buck234_gpio_dvs[3];
+					/* GPIO of [0]DVS1, [1]DVS2, [2]DVS3 */
+	int buck234_gpio_selb[3]; /* [0]SELB2, [1]SELB3, [2]SELB4 */
+	unsigned int buck2_voltage[8]; /* buckx_voltage in uV */
+	unsigned int buck3_voltage[8];
+	unsigned int buck4_voltage[8];
+};
+
+#endif /* __LINUX_MFD_MAX77686_H */
-- 
1.7.4.1
 
CD: 3ms