[PATCH 1/2] MAX8997/8966 MFD Driver Initial Release(PMIC+RTC+MUIC+Haptic+...)

[MyungJoo Ham]

MAX8997/MAX8966 chip is a multi-function device with I2C bussses. The
chip includes PMIC, RTC, Fuel Gauge, MUIC, Haptic, Flash control, and
Battery (charging) control.

This patch is an initial release of a MAX8997/8966 driver that supports
to enable the chip with its primary I2C bus that connects every device
mentioned above except for Fuel Gauge, which uses another I2C bus. The
fuel gauge is not supported by this mfd driver and is supported by a
seperated driver of MAX17042 Fuel Gauge (yes, the fuel gauge part is
compatible with MAX17042).

Signed-off-by: MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 drivers/mfd/Kconfig                 |   12 ++
 drivers/mfd/Makefile                |    1 +
 drivers/mfd/max8997.c               |  211 +++++++++++++++++++++++++++++++
 include/linux/mfd/max8997-private.h |  238 +++++++++++++++++++++++++++++++++++
 include/linux/mfd/max8997.h         |   88 +++++++++++++
 5 files changed, 550 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mfd/max8997.c
 create mode 100644 include/linux/mfd/max8997-private.h
 create mode 100644 include/linux/mfd/max8997.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index da9d297..486bf38 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -293,6 +293,18 @@ config MFD_MAX8925
 	  accessing the device, additional drivers must be enabled in order
 	  to use the functionality of the device.
 
+config MFD_MAX8997
+	bool "Maxim Semiconductor MAX8997/8966 PMIC Support"
+	depends on I2C=y && GENERIC_HARDIRQS
+	select MFD_CORE
+	help
+	  Say yes here to support for Maxim Semiconductor MAX8998/8966.
+	  This is a Power Management IC with RTC, Flash, Fuel Gauge, Haptic,
+	  MUIC controls on chip.
+	  This driver provies common support for accessing the device,
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 config MFD_MAX8998
 	bool "Maxim Semiconductor MAX8998/National LP3974 PMIC Support"
 	depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 848e7ea..0356b85 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_UCB1400_CORE)	+= ucb1400_core.o
 obj-$(CONFIG_PMIC_DA903X)	+= da903x.o
 max8925-objs			:= max8925-core.o max8925-i2c.o
 obj-$(CONFIG_MFD_MAX8925)	+= max8925.o
+obj-$(CONFIG_MFD_MAX8997)	+= max8997.o
 obj-$(CONFIG_MFD_MAX8998)	+= max8998.o max8998-irq.o
 
 pcf50633-objs			:= pcf50633-core.o pcf50633-irq.o
diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
new file mode 100644
index 0000000..ac70501
--- /dev/null
+++ b/drivers/mfd/max8997.c
@@ -0,0 +1,211 @@
+/*
+ * max8997.c - mfd core driver for the Maxim 8966 and 8997
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
+ *
+ * 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 max8998.c
+ */
+
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8997.h>
+#include <linux/mfd/max8997-private.h>
+
+#define I2C_ADDR_PMIC	(0xCC >> 1)
+#define I2C_ADDR_MUIC	(0x4A >> 1)
+#define I2C_ADDR_BATTERY	(0x6C >> 1)
+#define I2C_ADDR_RTC	(0x0C >> 1)
+#define I2C_ADDR_HAPTIC	(0x90 >> 1)
+
+static struct mfd_cell max8997_devs[] = {
+#ifdef CONFIG_REGULATOR_MAX8997
+	{
+		.name = "max8997-pmic",
+	},
+#endif
+#ifdef CONFIG_RTC_MAX8997
+	{
+		.name = "max8997-rtc",
+	},
+#endif
+#ifdef CONFIG_CHARGERCTRL_MAX8997
+	{
+		.name = "max8997-battery-charger",
+	},
+#endif
+#ifdef CONFIG_HAPTIC_MAX8997
+	{
+		.name = "max8997-haptic",
+	},
+#endif
+#ifdef CONFIG_MUIC_MAX8997
+	{
+		/* WTH is muic? something like FSA9480? */
+		.name = "max8997-muic",
+	},
+#endif
+#ifdef CONFIG_FLASH_MAX8997
+	{
+		.name = "max8997-flash", /* use pmic's i2c */
+	},
+#endif
+};
+
+int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
+{
+	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max8997->iolock);
+	ret = i2c_smbus_read_byte_data(i2c, reg);
+	mutex_unlock(&max8997->iolock);
+	if (ret < 0)
+		return ret;
+
+	ret &= 0xff;
+	*dest = ret;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max8997_read_reg);
+
+int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
+{
+	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max8997->iolock);
+	ret = i2c_smbus_write_byte_data(i2c, reg, value);
+	mutex_unlock(&max8997->iolock);
+	return ret;
+}
+EXPORT_SYMBOL(max8997_write_reg);
+
+int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
+{
+	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max8997->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(&max8997->iolock);
+	return ret;
+}
+EXPORT_SYMBOL(max8997_update_reg);
+
+static int max8997_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct max8997_dev *max8997;
+	int ret = 0;
+
+	max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
+	if (max8997 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max8997);
+	max8997->dev = &i2c->dev;
+	max8997->i2c = i2c;
+	max8997->type = id->driver_data;
+
+	mutex_init(&max8997->iolock);
+
+	max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+	i2c_set_clientdata(max8997->rtc, max8997);
+	max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
+	i2c_set_clientdata(max8997->haptic, max8997);
+	max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
+	i2c_set_clientdata(max8997->muic, max8997);
+
+	pm_runtime_set_active(max8997->dev);
+
+	mfd_add_devices(max8997->dev, -1, max8997_devs,
+			ARRAY_SIZE(max8997_devs),
+			NULL, 0);
+
+	/*
+	 * TODO: enable others (flash, muic, rtc, battery, ...) and
+	 * check the return value
+	 */
+
+	if (ret < 0)
+		goto err;
+
+	return ret;
+
+err:
+	mfd_remove_devices(max8997->dev);
+	i2c_unregister_device(max8997->muic);
+	i2c_unregister_device(max8997->haptic);
+	i2c_unregister_device(max8997->rtc);
+	kfree(max8997);
+	return ret;
+}
+
+static int max8997_i2c_remove(struct i2c_client *i2c)
+{
+	struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(max8997->dev);
+	i2c_unregister_device(max8997->muic);
+	i2c_unregister_device(max8997->haptic);
+	i2c_unregister_device(max8997->rtc);
+	kfree(max8997);
+
+	return 0;
+}
+
+static const struct i2c_device_id max8997_i2c_id[] = {
+	{ "max8997", TYPE_MAX8997 },
+	{ "max8966", TYPE_MAX8966 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
+
+static struct i2c_driver max8997_i2c_driver = {
+	.driver = {
+		   .name = "max8997",
+		   .owner = THIS_MODULE,
+	},
+	.probe = max8997_i2c_probe,
+	.remove = max8997_i2c_remove,
+	.id_table = max8997_i2c_id,
+};
+
+static int __init max8997_i2c_init(void)
+{
+	return i2c_add_driver(&max8997_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max8997_i2c_init);
+
+static void __exit max8997_i2c_exit(void)
+{
+	i2c_del_driver(&max8997_i2c_driver);
+}
+module_exit(max8997_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
+MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max8997-private.h b/include/linux/mfd/max8997-private.h
new file mode 100644
index 0000000..ffa6544
--- /dev/null
+++ b/include/linux/mfd/max8997-private.h
@@ -0,0 +1,238 @@
+/*
+ * max8997.h - Voltage regulator driver for the Maxim 8997
+ *
+ *  Copyright (C) 2010 Samsung Electrnoics
+ *  MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
+ *
+ * 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_MAX8997_PRIV_H
+#define __LINUX_MFD_MAX8997_PRIV_H
+
+#include <linux/i2c.h>
+
+enum max8997_pmic_reg {
+	MAX8997_REG_PMIC_ID0	= 0x00,
+	MAX8997_REG_PMIC_ID1	= 0x01,
+	MAX8997_REG_INTSRC	= 0x02,
+	MAX8997_REG_INT1	= 0x03,
+	MAX8997_REG_INT2	= 0x04,
+	MAX8997_REG_INT3	= 0x05,
+	MAX8997_REG_INT4	= 0x06,
+
+	MAX8997_REG_INT1MSK	= 0x08,
+	MAX8997_REG_INT2MSK	= 0x09,
+	MAX8997_REG_INT3MSK	= 0x0a,
+	MAX8997_REG_INT4MSK	= 0x0b,
+
+	MAX8997_REG_STATUS1	= 0x0d,
+	MAX8997_REG_STATUS2	= 0x0e,
+	MAX8997_REG_STATUS3	= 0x0f,
+	MAX8997_REG_STATUS4	= 0x10,
+
+	MAX8997_REG_MAINCON1	= 0x13,
+	MAX8997_REG_MAINCON2	= 0x14,
+	MAX8997_REG_BUCKRAMP	= 0x15,
+
+	MAX8997_REG_BUCK1CTRL	= 0x18,
+	MAX8997_REG_BUCK1DVS1	= 0x19,
+	MAX8997_REG_BUCK1DVS2	= 0x1a,
+	MAX8997_REG_BUCK1DVS3	= 0x1b,
+	MAX8997_REG_BUCK1DVS4	= 0x1c,
+	MAX8997_REG_BUCK1DVS5	= 0x1d,
+	MAX8997_REG_BUCK1DVS6	= 0x1e,
+	MAX8997_REG_BUCK1DVS7	= 0x1f,
+	MAX8997_REG_BUCK1DVS8	= 0x20,
+	MAX8997_REG_BUCK2CTRL	= 0x21,
+	MAX8997_REG_BUCK2DVS1	= 0x22,
+	MAX8997_REG_BUCK2DVS2	= 0x23,
+	MAX8997_REG_BUCK2DVS3	= 0x24,
+	MAX8997_REG_BUCK2DVS4	= 0x25,
+	MAX8997_REG_BUCK2DVS5	= 0x26,
+	MAX8997_REG_BUCK2DVS6	= 0x27,
+	MAX8997_REG_BUCK2DVS7	= 0x28,
+	MAX8997_REG_BUCK2DVS8	= 0x29,
+	MAX8997_REG_BUCK3CTRL	= 0x2a,
+	MAX8997_REG_BUCK3DVS	= 0x2b,
+	MAX8997_REG_BUCK4CTRL	= 0x2c,
+	MAX8997_REG_BUCK4DVS	= 0x2d,
+	MAX8997_REG_BUCK5CTRL	= 0x2e,
+	MAX8997_REG_BUCK5DVS1	= 0x2f,
+	MAX8997_REG_BUCK5DVS2	= 0x30,
+	MAX8997_REG_BUCK5DVS3	= 0x31,
+	MAX8997_REG_BUCK5DVS4	= 0x32,
+	MAX8997_REG_BUCK5DVS5	= 0x33,
+	MAX8997_REG_BUCK5DVS6	= 0x34,
+	MAX8997_REG_BUCK5DVS7	= 0x35,
+	MAX8997_REG_BUCK5DVS8	= 0x36,
+	MAX8997_REG_BUCK6CTRL	= 0x37,
+	MAX8997_REG_BUCK6BPSKIPCTRL	= 0x38,
+	MAX8997_REG_BUCK7CTRL	= 0x39,
+	MAX8997_REG_BUCK7DVS	= 0x3a,
+	MAX8997_REG_LDO1CTRL	= 0x3b,
+	MAX8997_REG_LDO2CTRL	= 0x3c,
+	MAX8997_REG_LDO3CTRL	= 0x3d,
+	MAX8997_REG_LDO4CTRL	= 0x3e,
+	MAX8997_REG_LDO5CTRL	= 0x3f,
+	MAX8997_REG_LDO6CTRL	= 0x40,
+	MAX8997_REG_LDO7CTRL	= 0x41,
+	MAX8997_REG_LDO8CTRL	= 0x42,
+	MAX8997_REG_LDO9CTRL	= 0x43,
+	MAX8997_REG_LDO10CTRL	= 0x44,
+	MAX8997_REG_LDO11CTRL	= 0x45,
+	MAX8997_REG_LDO12CTRL	= 0x46,
+	MAX8997_REG_LDO13CTRL	= 0x47,
+	MAX8997_REG_LDO14CTRL	= 0x48,
+	MAX8997_REG_LDO15CTRL	= 0x49,
+	MAX8997_REG_LDO16CTRL	= 0x4a,
+	MAX8997_REG_LDO17CTRL	= 0x4b,
+	MAX8997_REG_LDO18CTRL	= 0x4c,
+	MAX8997_REG_LDO21CTRL	= 0x4d,
+
+	MAX8997_REG_MBCCTRL1	= 0x50,
+	MAX8997_REG_MBCCTRL2	= 0x51,
+	MAX8997_REG_MBCCTRL3	= 0x52,
+	MAX8997_REG_MBCCTRL4	= 0x53,
+	MAX8997_REG_MBCCTRL5	= 0x54,
+	MAX8997_REG_MBCCTRL6	= 0x55,
+	MAX8997_REG_OTPCGHCVS	= 0x56,
+
+	MAX8997_REG_SAFEOUTCTRL	= 0x5a,
+
+	MAX8997_REG_LBCNFG1	= 0x5e,
+	MAX8997_REG_LBCNFG2	= 0x5f,
+	MAX8997_REG_BBCCTRL	= 0x60,
+
+	MAX8997_REG_FLASH1_CUR	= 0x63, /* 0x63 ~ 0x6e for FLASH */
+	MAX8997_REG_FLASH2_CUR	= 0x64,
+	MAX8997_REG_MOVIE_CUR	= 0x65,
+	MAX8997_REG_GSMB_CUR	= 0x66,
+	MAX8997_REG_BOOST_CNTL	= 0x67,
+	MAX8997_REG_LEN_CNTL	= 0x68,
+	MAX8997_REG_FLASH_CNTL	= 0x69,
+	MAX8997_REG_WDT_CNTL	= 0x6a,
+	MAX8997_REG_MAXFLASH1	= 0x6b,
+	MAX8997_REG_MAXFLASH2	= 0x6c,
+	MAX8997_REG_FLASHSTATUS	= 0x6d,
+	MAX8997_REG_FLASHSTATUSMASK	= 0x6e,
+
+	MAX8997_REG_GPIOCNTL1	= 0x70,
+	MAX8997_REG_GPIOCNTL2	= 0x71,
+	MAX8997_REG_GPIOCNTL3	= 0x72,
+	MAX8997_REG_GPIOCNTL4	= 0x73,
+	MAX8997_REG_GPIOCNTL5	= 0x74,
+	MAX8997_REG_GPIOCNTL6	= 0x75,
+	MAX8997_REG_GPIOCNTL7	= 0x76,
+	MAX8997_REG_GPIOCNTL8	= 0x77,
+	MAX8997_REG_GPIOCNTL9	= 0x78,
+	MAX8997_REG_GPIOCNTL10	= 0x79,
+	MAX8997_REG_GPIOCNTL11	= 0x7a,
+	MAX8997_REG_GPIOCNTL12	= 0x7b,
+
+	MAX8997_REG_LDO1CONFIG	= 0x80,
+	MAX8997_REG_LDO2CONFIG	= 0x81,
+	MAX8997_REG_LDO3CONFIG	= 0x82,
+	MAX8997_REG_LDO4CONFIG	= 0x83,
+	MAX8997_REG_LDO5CONFIG	= 0x84,
+	MAX8997_REG_LDO6CONFIG	= 0x85,
+	MAX8997_REG_LDO7CONFIG	= 0x86,
+	MAX8997_REG_LDO8CONFIG	= 0x87,
+	MAX8997_REG_LDO9CONFIG	= 0x88,
+	MAX8997_REG_LDO10CONFIG	= 0x89,
+	MAX8997_REG_LDO11CONFIG	= 0x8a,
+	MAX8997_REG_LDO12CONFIG	= 0x8b,
+	MAX8997_REG_LDO13CONFIG	= 0x8c,
+	MAX8997_REG_LDO14CONFIG	= 0x8d,
+	MAX8997_REG_LDO15CONFIG	= 0x8e,
+	MAX8997_REG_LDO16CONFIG	= 0x8f,
+	MAX8997_REG_LDO17CONFIG	= 0x90,
+	MAX8997_REG_LDO18CONFIG	= 0x91,
+	MAX8997_REG_LDO21CONFIG	= 0x92,
+
+	MAX8997_REG_DVSOKTIMER1	= 0x97,
+	MAX8997_REG_DVSOKTIMER2	= 0x98,
+	MAX8997_REG_DVSOKTIMER3	= 0x99,
+	MAX8997_REG_DVSOKTIMER4	= 0x9a,
+
+	MAX8997_REG_PMIC_END	= 0x9b,
+};
+
+enum max8997_muic_reg {
+	MAX8997_MUIC_REG_ID		= 0x0,
+	MAX8997_MUIC_REG_INT1		= 0x1,
+	MAX8997_MUIC_REG_INT2		= 0x2,
+	MAX8997_MUIC_REG_INT3		= 0x3,
+	MAX8997_MUIC_REG_STATUS1	= 0x4,
+	MAX8997_MUIC_REG_STATUS2	= 0x5,
+	MAX8997_MUIC_REG_STATUS3	= 0x6,
+	MAX8997_MUIC_REG_INTMASK1	= 0x7,
+	MAX8997_MUIC_REG_INTMASK2	= 0x8,
+	MAX8997_MUIC_REG_INTMASK3	= 0x9,
+	MAX8997_MUIC_REG_CDETCTRL	= 0xa,
+
+	MAX8997_MUIC_REG_CONTROL1	= 0xc,
+	MAX8997_MUIC_REG_CONTROL2	= 0xd,
+	MAX8997_MUIC_REG_CONTROL3	= 0xe,
+
+	MAX8997_MUIC_REG_END		= 0xf,
+};
+
+enum max8997_haptic_reg {
+	MAX8997_HAPTIC_REG_GENERAL	= 0x00,
+	MAX8997_HAPTIC_REG_CONF1	= 0x01,
+	MAX8997_HAPTIC_REG_CONF2	= 0x02,
+	MAX8997_HAPTIC_REG_DRVCONF	= 0x03,
+	MAX8997_HAPTIC_REG_CYCLECONF1	= 0x04,
+	MAX8997_HAPTIC_REG_CYCLECONF2	= 0x05,
+	MAX8997_HAPTIC_REG_SIGCONF1	= 0x06,
+	MAX8997_HAPTIC_REG_SIGCONF2	= 0x07,
+	MAX8997_HAPTIC_REG_SIGCONF3	= 0x08,
+	MAX8997_HAPTIC_REG_SIGCONF4	= 0x09,
+	MAX8997_HAPTIC_REG_SIGDC1	= 0x0a,
+	MAX8997_HAPTIC_REG_SIGDC2	= 0x0b,
+	MAX8997_HAPTIC_REG_SIGPWMDC1	= 0x0c,
+	MAX8997_HAPTIC_REG_SIGPWMDC2	= 0x0d,
+	MAX8997_HAPTIC_REG_SIGPWMDC3	= 0x0e,
+	MAX8997_HAPTIC_REG_SIGPWMDC4	= 0x0f,
+	MAX8997_HAPTIC_REG_MTR_REV	= 0x10,
+};
+
+#define MAX8997_REG_BUCK1DVS(x)	(MAX8997_REG_BUCK1DVS1 + (x) - 1)
+#define MAX8997_REG_BUCK2DVS(x)	(MAX8997_REG_BUCK2DVS1 + (x) - 1)
+#define MAX8997_REG_BUCK5DVS(x)	(MAX8997_REG_BUCK5DVS1 + (x) - 1)
+
+extern int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest);
+extern int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value);
+extern int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask);
+
+struct max8997_dev {
+	struct device *dev;
+	struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
+	struct i2c_client *rtc; /* slave addr 0x0c */
+	struct i2c_client *haptic; /* slave addr 0x90 */
+	struct i2c_client *muic; /* slave addr 0x4a */
+	struct mutex iolock;
+
+	int type;
+	struct platform_device *battery; /* battery control (not fuel gauge) */
+};
+
+enum max8997_types {
+	TYPE_MAX8997,
+	TYPE_MAX8966,
+};
+
+#endif /*  __LINUX_MFD_MAX8997_PRIV_H */
diff --git a/include/linux/mfd/max8997.h b/include/linux/mfd/max8997.h
new file mode 100644
index 0000000..ef3feb9
--- /dev/null
+++ b/include/linux/mfd/max8997.h
@@ -0,0 +1,88 @@
+/*
+ * max8997.h - Driver for the Maxim 8997/8966
+ *
+ *  Copyright (C) 2009-2010 Samsung Electrnoics
+ *  MyungJoo Ham <myungjoo.ham@xxxxxxxxxxx>
+ *
+ * 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 max8998.h
+ *
+ * MAX8997 has PMIC, MUIC, HAPTIC, RTC, FLASH, and Fuel Gauge devices.
+ * Except Fuel Gauge, every device shares the same I2C bus and included in
+ * this mfd driver. Although the fuel gauge is included in the chip, it is
+ * excluded from the driver because a) it has a different I2C bus from
+ * others and b) it can be enabled simply by using MAX17042 driver.
+ */
+
+#ifndef __LINUX_MFD_MAX8998_H
+#define __LINUX_MFD_MAX8998_H
+
+#include <linux/power/max17042_battery.h>
+#include <linux/regulator/consumer.h>
+
+/* MAX8997/8966 regulator IDs */
+enum max8998_regulators {
+	MAX8997_LDO1 = 0,
+	MAX8997_LDO2,
+	MAX8997_LDO3,
+	MAX8997_LDO4,
+	MAX8997_LDO5,
+	MAX8997_LDO6,
+	MAX8997_LDO7,
+	MAX8997_LDO8,
+	MAX8997_LDO9,
+	MAX8997_LDO10,
+	MAX8997_LDO11,
+	MAX8997_LDO12,
+	MAX8997_LDO13,
+	MAX8997_LDO14,
+	MAX8997_LDO15,
+	MAX8997_LDO16,
+	MAX8997_LDO17,
+	MAX8997_LDO18,
+	MAX8997_LDO21,
+	MAX8997_BUCK1,
+	MAX8997_BUCK2,
+	MAX8997_BUCK3,
+	MAX8997_BUCK4,
+	MAX8997_BUCK5,
+	MAX8997_BUCK6,
+	MAX8997_BUCK7,
+	MAX8997_EN32KHZ_AP,
+	MAX8997_EN32KHZ_CP,
+	MAX8997_ENVICHG,
+	MAX8997_ESAFEOUT1,
+	MAX8997_ESAFEOUT2,
+	MAX8997_CHARGER_CV, /* control MBCCV of MBCCTRL3 */
+	MAX8997_CHARGER, /* charger current, MBCCTRL4 */
+	MAX8997_CHARGER_TOPOFF, /* MBCCTRL5 */
+};
+
+struct max8997_regulator_data {
+	int id;
+	struct regulator_init_data *initdata;
+};
+
+struct max8997_platform_data {
+	/* PMIC: Not implemented */
+	/* MUIC: Not implemented */
+	/* HAPTIC: Not implemented */
+	/* RTC: Not implemented */
+	/* Flash: Not implemented */
+	/* Charger control: Not implemented */
+};
+
+#endif /* __LINUX_MFD_MAX8998_H */
-- 
1.7.1

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