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    Subject[PATCH v3] drivers: regulator: add Maxim 8998 driver
    From: Kyungmin Park <kyungmin.park@samsung.com>

    This patch adds voltage regulator driver for Maxim 8998 chip. This chip
    is used on Samsung Aquila and GONI boards and provides following
    functionalities:
    - 4 BUCK voltage converters, 17 LDO power regulators and 5 other power
    controllers
    - battery charger

    This patch adds basic driver for voltage regulators and MAX 8998 MFD core.

    Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
    Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

    ---

    Changes sinve V2:
    - moved max8998_{read,write,update}_reg function to
    include/linux/mfd/max8998-private.h
    - removed max8998-rtc definition (rtc subfunction uses different i2c id
    (mfd functionality is still required for battery charger driver)
    - added iolock mutex to serialize register access correctly

    Changes since V1:
    - converted to MFD framework (for future extensions with RTC and battery
    charger drivers)
    - removed i2c register cache
    - removed dummy irq support (gpio keys will be used for setting irq_wake)
    - removed static voltage map tables
    - introduced atomic register update io function
    - other code cleanup suggested by Mark Brown

    ---
    drivers/mfd/Kconfig | 10 +
    drivers/mfd/Makefile | 1 +
    drivers/mfd/max8998.c | 160 +++++++++
    drivers/regulator/Kconfig | 9 +
    drivers/regulator/Makefile | 1 +
    drivers/regulator/max8998.c | 610 +++++++++++++++++++++++++++++++++++
    include/linux/mfd/max8998-private.h | 112 +++++++
    include/linux/mfd/max8998.h | 78 +++++
    8 files changed, 981 insertions(+), 0 deletions(-)
    create mode 100644 drivers/mfd/max8998.c
    create mode 100644 drivers/regulator/max8998.c
    create mode 100644 include/linux/mfd/max8998-private.h
    create mode 100644 include/linux/mfd/max8998.h

    diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
    index 9da0e50..ad61a9e 100644
    --- a/drivers/mfd/Kconfig
    +++ b/drivers/mfd/Kconfig
    @@ -252,6 +252,16 @@ config MFD_MAX8925
    accessing the device, additional drivers must be enabled in order
    to use the functionality of the device.

    +config MFD_MAX8998
    + bool "Maxim Semiconductor MAX8998 PMIC Support"
    + depends on I2C=y
    + select MFD_CORE
    + help
    + Say yes here to support for Maxim Semiconductor MAX8998. This is
    + a Power Management IC. 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_WM8400
    tristate "Support Wolfson Microelectronics WM8400"
    select MFD_CORE
    diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
    index fb503e7..a362ccf 100644
    --- a/drivers/mfd/Makefile
    +++ b/drivers/mfd/Makefile
    @@ -56,6 +56,7 @@ 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_MAX8998) += max8998.o

    pcf50633-objs := pcf50633-core.o pcf50633-irq.o
    obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
    diff --git a/drivers/mfd/max8998.c b/drivers/mfd/max8998.c
    new file mode 100644
    index 0000000..0d68de2
    --- /dev/null
    +++ b/drivers/mfd/max8998.c
    @@ -0,0 +1,160 @@
    +/*
    + * max8698.c - mfd core driver for the Maxim 8998
    + *
    + * Copyright (C) 2009-2010 Samsung Electronics
    + * Kyungmin Park <kyungmin.park@samsung.com>
    + * Marek Szyprowski <m.szyprowski@samsung.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.
    + *
    + * 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
    + */
    +
    +#include <linux/module.h>
    +#include <linux/moduleparam.h>
    +#include <linux/init.h>
    +#include <linux/slab.h>
    +#include <linux/i2c.h>
    +#include <linux/mutex.h>
    +#include <linux/mfd/core.h>
    +#include <linux/mfd/max8998.h>
    +#include <linux/mfd/max8998-private.h>
    +
    +static struct mfd_cell max8998_devs[] = {
    + {
    + .name = "max8998-pmic",
    + }
    +};
    +
    +static int max8998_i2c_device_read(struct max8998_dev *max8998, u8 reg, u8 *dest)
    +{
    + struct i2c_client *client = max8998->i2c_client;
    + int ret;
    +
    + mutex_lock(&max8998->iolock);
    + ret = i2c_smbus_read_byte_data(client, reg);
    + mutex_unlock(&max8998->iolock);
    + if (ret < 0)
    + return ret;
    +
    + ret &= 0xff;
    + *dest = ret;
    + return 0;
    +}
    +
    +static int max8998_i2c_device_write(struct max8998_dev *max8998, u8 reg, u8 value)
    +{
    + struct i2c_client *client = max8998->i2c_client;
    + int ret;
    +
    + mutex_lock(&max8998->iolock);
    + ret = i2c_smbus_write_byte_data(client, reg, value);
    + mutex_unlock(&max8998->iolock);
    + return ret;
    +}
    +
    +static int max8998_i2c_device_update(struct max8998_dev *max8998, u8 reg,
    + u8 val, u8 mask)
    +{
    + struct i2c_client *client = max8998->i2c_client;
    + int ret;
    +
    + mutex_lock(&max8998->iolock);
    + ret = i2c_smbus_read_byte_data(client, reg);
    + if (ret >= 0) {
    + u8 old_val = ret & 0xff;
    + u8 new_val = (val & mask) | (old_val & (~mask));
    + ret = i2c_smbus_write_byte_data(client, reg, new_val);
    + if (ret >= 0)
    + ret = 0;
    + }
    + mutex_unlock(&max8998->iolock);
    + return ret;
    +}
    +
    +static int max8998_i2c_probe(struct i2c_client *i2c,
    + const struct i2c_device_id *id)
    +{
    + struct max8998_dev *max8998;
    + int ret = 0;
    +
    + max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL);
    + if (max8998 == NULL) {
    + kfree(i2c);
    + return -ENOMEM;
    + }
    +
    + i2c_set_clientdata(i2c, max8998);
    + max8998->dev = &i2c->dev;
    + max8998->i2c_client = i2c;
    + max8998->dev_read = max8998_i2c_device_read;
    + max8998->dev_write = max8998_i2c_device_write;
    + max8998->dev_update = max8998_i2c_device_update;
    + mutex_init(&max8998->iolock);
    +
    + ret = mfd_add_devices(max8998->dev, -1,
    + max8998_devs, ARRAY_SIZE(max8998_devs),
    + NULL, 0);
    + if (ret < 0)
    + goto err;
    +
    + return ret;
    +
    +err:
    + mfd_remove_devices(max8998->dev);
    + kfree(max8998);
    + return ret;
    +}
    +
    +static int max8998_i2c_remove(struct i2c_client *i2c)
    +{
    + struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
    +
    + mfd_remove_devices(max8998->dev);
    + kfree(max8998);
    +
    + return 0;
    +}
    +
    +static const struct i2c_device_id max8998_i2c_id[] = {
    + { "max8998", 0 },
    + { }
    +};
    +MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
    +
    +static struct i2c_driver max8998_i2c_driver = {
    + .driver = {
    + .name = "max8998",
    + .owner = THIS_MODULE,
    + },
    + .probe = max8998_i2c_probe,
    + .remove = max8998_i2c_remove,
    + .id_table = max8998_i2c_id,
    +};
    +
    +static int __init max8998_i2c_init(void)
    +{
    + return i2c_add_driver(&max8998_i2c_driver);
    +}
    +/* init early so consumer devices can complete system boot */
    +subsys_initcall(max8998_i2c_init);
    +
    +static void __exit max8998_i2c_exit(void)
    +{
    + i2c_del_driver(&max8998_i2c_driver);
    +}
    +module_exit(max8998_i2c_exit);
    +
    +MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver");
    +MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
    +MODULE_LICENSE("GPL");
    diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
    index 04f2e08..e190164 100644
    --- a/drivers/regulator/Kconfig
    +++ b/drivers/regulator/Kconfig
    @@ -100,6 +100,15 @@ config REGULATOR_MAX8925
    help
    Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.

    +config REGULATOR_MAX8998
    + tristate "Maxim 8998 voltage regulator"
    + depends on I2C
    + default n
    + help
    + This driver controls a Maxim 8998 voltage output regulator
    + via I2C bus. The provided regulator is suitable for S3C6410
    + and S5PC1XX chips to control VCC_CORE and VCC_USIM voltages.
    +
    config REGULATOR_TWL4030
    bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC"
    depends on TWL4030_CORE
    diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
    index 4e7feec..182eb02 100644
    --- a/drivers/regulator/Makefile
    +++ b/drivers/regulator/Makefile
    @@ -16,6 +16,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
    obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
    obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
    obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
    +obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
    obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
    obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
    obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
    diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
    new file mode 100644
    index 0000000..174fd19
    --- /dev/null
    +++ b/drivers/regulator/max8998.c
    @@ -0,0 +1,610 @@
    +/*
    + * max8998.c - Voltage regulator driver for the Maxim 8998
    + *
    + * Copyright (C) 2009-2010 Samsung Electronics
    + * Kyungmin Park <kyungmin.park@samsung.com>
    + * Marek Szyprowski <m.szyprowski@samsung.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.
    + *
    + * 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
    + */
    +
    +#include <linux/module.h>
    +#include <linux/init.h>
    +#include <linux/i2c.h>
    +#include <linux/err.h>
    +#include <linux/gpio.h>
    +#include <linux/slab.h>
    +#include <linux/interrupt.h>
    +#include <linux/mutex.h>
    +#include <linux/platform_device.h>
    +#include <linux/regulator/driver.h>
    +#include <linux/mfd/max8998.h>
    +#include <linux/mfd/max8998-private.h>
    +
    +struct max8998_data {
    + struct device *dev;
    + struct max8998_dev *iodev;
    + int num_regulators;
    + struct regulator_dev **rdev;
    +};
    +
    +struct voltage_map_desc {
    + int min;
    + int max;
    + int step;
    +};
    +
    +/* Voltage maps */
    +static const struct voltage_map_desc ldo23_voltage_map_desc = {
    + .min = 800, .step = 50, .max = 1300,
    +};
    +static const struct voltage_map_desc ldo456711_voltage_map_desc = {
    + .min = 1600, .step = 100, .max = 3600,
    +};
    +static const struct voltage_map_desc ldo8_voltage_map_desc = {
    + .min = 3000, .step = 100, .max = 3600,
    +};
    +static const struct voltage_map_desc ldo9_voltage_map_desc = {
    + .min = 2800, .step = 100, .max = 3100,
    +};
    +static const struct voltage_map_desc ldo10_voltage_map_desc = {
    + .min = 950, .step = 50, .max = 1300,
    +};
    +static const struct voltage_map_desc ldo1213_voltage_map_desc = {
    + .min = 800, .step = 100, .max = 3300,
    +};
    +static const struct voltage_map_desc ldo1415_voltage_map_desc = {
    + .min = 1200, .step = 100, .max = 3300,
    +};
    +static const struct voltage_map_desc ldo1617_voltage_map_desc = {
    + .min = 1600, .step = 100, .max = 3600,
    +};
    +static const struct voltage_map_desc buck12_voltage_map_desc = {
    + .min = 750, .step = 25, .max = 1525,
    +};
    +static const struct voltage_map_desc buck3_voltage_map_desc = {
    + .min = 1600, .step = 100, .max = 3600,
    +};
    +static const struct voltage_map_desc buck4_voltage_map_desc = {
    + .min = 800, .step = 100, .max = 2300,
    +};
    +
    +static const struct voltage_map_desc *ldo_voltage_map[] = {
    + NULL,
    + NULL,
    + &ldo23_voltage_map_desc, /* LDO2 */
    + &ldo23_voltage_map_desc, /* LDO3 */
    + &ldo456711_voltage_map_desc, /* LDO4 */
    + &ldo456711_voltage_map_desc, /* LDO5 */
    + &ldo456711_voltage_map_desc, /* LDO6 */
    + &ldo456711_voltage_map_desc, /* LDO7 */
    + &ldo8_voltage_map_desc, /* LDO8 */
    + &ldo9_voltage_map_desc, /* LDO9 */
    + &ldo10_voltage_map_desc, /* LDO10 */
    + &ldo456711_voltage_map_desc, /* LDO11 */
    + &ldo1213_voltage_map_desc, /* LDO12 */
    + &ldo1213_voltage_map_desc, /* LDO13 */
    + &ldo1415_voltage_map_desc, /* LDO14 */
    + &ldo1415_voltage_map_desc, /* LDO15 */
    + &ldo1617_voltage_map_desc, /* LDO16 */
    + &ldo1617_voltage_map_desc, /* LDO17 */
    + &buck12_voltage_map_desc, /* BUCK1 */
    + &buck12_voltage_map_desc, /* BUCK2 */
    + &buck3_voltage_map_desc, /* BUCK3 */
    + &buck4_voltage_map_desc, /* BUCK4 */
    +};
    +
    +static inline int max8998_get_ldo(struct regulator_dev *rdev)
    +{
    + return rdev_get_id(rdev);
    +}
    +
    +static int max8998_list_voltage(struct regulator_dev *rdev,
    + unsigned int selector)
    +{
    + const struct voltage_map_desc *desc;
    + int ldo = max8998_get_ldo(rdev);
    + int val;
    +
    + if (ldo > ARRAY_SIZE(ldo_voltage_map))
    + return -EINVAL;
    +
    + desc = ldo_voltage_map[ldo];
    + if (desc == NULL)
    + return -EINVAL;
    +
    + val = desc->min + desc->step * selector;
    + if (val > desc->max)
    + return -EINVAL;
    +
    + return val * 1000;
    +}
    +
    +static int max8998_get_enable_register(struct regulator_dev *rdev,
    + int *reg, int *shift)
    +{
    + int ldo = max8998_get_ldo(rdev);
    +
    + switch (ldo) {
    + case MAX8998_LDO2 ... MAX8998_LDO5:
    + *reg = MAX8998_REG_ONOFF1;
    + *shift = 3 - (ldo - MAX8998_LDO2);
    + break;
    + case MAX8998_LDO6 ... MAX8998_LDO13:
    + *reg = MAX8998_REG_ONOFF2;
    + *shift = 7 - (ldo - MAX8998_LDO6);
    + break;
    + case MAX8998_LDO14 ... MAX8998_LDO17:
    + *reg = MAX8998_REG_ONOFF3;
    + *shift = 7 - (ldo - MAX8998_LDO14);
    + break;
    + case MAX8998_BUCK1 ... MAX8998_BUCK4:
    + *reg = MAX8998_REG_ONOFF1;
    + *shift = 7 - (ldo - MAX8998_BUCK1);
    + break;
    + case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
    + *reg = MAX8998_REG_ONOFF4;
    + *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
    + break;
    + case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
    + *reg = MAX8998_REG_CHGR2;
    + *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + return 0;
    +}
    +
    +static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
    +{
    + struct max8998_data *max8998 = rdev_get_drvdata(rdev);
    + int ret, reg, shift = 8;
    + u8 val;
    +
    + ret = max8998_get_enable_register(rdev, &reg, &shift);
    + if (ret)
    + return ret;
    +
    + ret = max8998_read_reg(max8998->iodev, reg, &val);
    + if (ret)
    + return ret;
    +
    + return val & (1 << shift);
    +}
    +
    +static int max8998_ldo_enable(struct regulator_dev *rdev)
    +{
    + struct max8998_data *max8998 = rdev_get_drvdata(rdev);
    + int reg, shift = 8, ret;
    +
    + ret = max8998_get_enable_register(rdev, &reg, &shift);
    + if (ret)
    + return ret;
    +
    + return max8998_update_reg(max8998->iodev, reg, 1<<shift, 1<<shift);
    +}
    +
    +static int max8998_ldo_disable(struct regulator_dev *rdev)
    +{
    + struct max8998_data *max8998 = rdev_get_drvdata(rdev);
    + int reg, shift = 8, ret;
    +
    + ret = max8998_get_enable_register(rdev, &reg, &shift);
    + if (ret)
    + return ret;
    +
    + return max8998_update_reg(max8998->iodev, reg, 0, 1<<shift);
    +}
    +
    +static int max8998_get_voltage_register(struct regulator_dev *rdev,
    + int *_reg, int *_shift, int *_mask)
    +{
    + int ldo = max8998_get_ldo(rdev);
    + int reg, shift = 0, mask = 0xff;
    +
    + switch (ldo) {
    + case MAX8998_LDO2 ... MAX8998_LDO3:
    + reg = MAX8998_REG_LDO2_LDO3;
    + mask = 0xf;
    + if (ldo == MAX8998_LDO2)
    + shift = 4;
    + else
    + shift = 0;
    + break;
    + case MAX8998_LDO4 ... MAX8998_LDO7:
    + reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
    + break;
    + case MAX8998_LDO8 ... MAX8998_LDO9:
    + reg = MAX8998_REG_LDO8_LDO9;
    + mask = 0xf;
    + if (ldo == MAX8998_LDO8)
    + shift = 4;
    + else
    + shift = 0;
    + break;
    + case MAX8998_LDO10 ... MAX8998_LDO11:
    + reg = MAX8998_REG_LDO10_LDO11;
    + if (ldo == MAX8998_LDO10) {
    + shift = 5;
    + mask = 0x7;
    + } else {
    + shift = 0;
    + mask = 0x1f;
    + }
    + break;
    + case MAX8998_LDO12 ... MAX8998_LDO17:
    + reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
    + break;
    + case MAX8998_BUCK1:
    + reg = MAX8998_REG_BUCK1_DVSARM1;
    + break;
    + case MAX8998_BUCK2:
    + reg = MAX8998_REG_BUCK2_DVSINT1;
    + break;
    + case MAX8998_BUCK3:
    + reg = MAX8998_REG_BUCK3;
    + break;
    + case MAX8998_BUCK4:
    + reg = MAX8998_REG_BUCK4;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    + *_reg = reg;
    + *_shift = shift;
    + *_mask = mask;
    +
    + return 0;
    +}
    +
    +static int max8998_get_voltage(struct regulator_dev *rdev)
    +{
    + struct max8998_data *max8998 = rdev_get_drvdata(rdev);
    + int reg, shift = 0, mask, ret;
    + u8 val;
    +
    + ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
    + if (ret)
    + return ret;
    +
    + ret = max8998_read_reg(max8998->iodev, reg, &val);
    + if (ret)
    + return ret;
    +
    + val >>= shift;
    + val &= mask;
    +
    + return max8998_list_voltage(rdev, val);
    +}
    +
    +static int max8998_set_voltage(struct regulator_dev *rdev,
    + int min_uV, int max_uV)
    +{
    + struct max8998_data *max8998 = rdev_get_drvdata(rdev);
    + int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
    + const struct voltage_map_desc *desc;
    + int ldo = max8998_get_ldo(rdev);
    + int reg, shift = 0, mask, ret;
    + int i = 0;
    +
    + if (ldo > ARRAY_SIZE(ldo_voltage_map))
    + return -EINVAL;
    +
    + desc = ldo_voltage_map[ldo];
    + if (desc == NULL)
    + return -EINVAL;
    +
    + if (max_vol < desc->min || min_vol > desc->max)
    + return -EINVAL;
    +
    + while (desc->min + desc->step*i < max_vol &&
    + desc->min + desc->step*i < desc->max)
    + i++;
    +
    + ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
    + if (ret)
    + return ret;
    +
    + return max8998_update_reg(max8998->iodev, reg, i<<shift, mask<<shift);
    +}
    +
    +static struct regulator_ops max8998_ldo_ops = {
    + .list_voltage = max8998_list_voltage,
    + .is_enabled = max8998_ldo_is_enabled,
    + .enable = max8998_ldo_enable,
    + .disable = max8998_ldo_disable,
    + .get_voltage = max8998_get_voltage,
    + .set_voltage = max8998_set_voltage,
    + .set_suspend_enable = max8998_ldo_enable,
    + .set_suspend_disable = max8998_ldo_disable,
    +};
    +
    +static struct regulator_ops max8998_buck_ops = {
    + .list_voltage = max8998_list_voltage,
    + .is_enabled = max8998_ldo_is_enabled,
    + .enable = max8998_ldo_enable,
    + .disable = max8998_ldo_disable,
    + .get_voltage = max8998_get_voltage,
    + .set_voltage = max8998_set_voltage,
    + .set_suspend_enable = max8998_ldo_enable,
    + .set_suspend_disable = max8998_ldo_disable,
    +};
    +
    +static struct regulator_ops max8998_others_ops = {
    + .is_enabled = max8998_ldo_is_enabled,
    + .enable = max8998_ldo_enable,
    + .disable = max8998_ldo_disable,
    + .set_suspend_enable = max8998_ldo_enable,
    + .set_suspend_disable = max8998_ldo_disable,
    +};
    +
    +static struct regulator_desc regulators[] = {
    + {
    + .name = "LDO2",
    + .id = MAX8998_LDO2,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO3",
    + .id = MAX8998_LDO3,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO4",
    + .id = MAX8998_LDO4,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO5",
    + .id = MAX8998_LDO5,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO6",
    + .id = MAX8998_LDO6,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO7",
    + .id = MAX8998_LDO7,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO8",
    + .id = MAX8998_LDO8,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO9",
    + .id = MAX8998_LDO9,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO10",
    + .id = MAX8998_LDO10,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO11",
    + .id = MAX8998_LDO11,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO12",
    + .id = MAX8998_LDO12,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO13",
    + .id = MAX8998_LDO13,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO14",
    + .id = MAX8998_LDO14,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO15",
    + .id = MAX8998_LDO15,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO16",
    + .id = MAX8998_LDO16,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "LDO17",
    + .id = MAX8998_LDO17,
    + .ops = &max8998_ldo_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "BUCK1",
    + .id = MAX8998_BUCK1,
    + .ops = &max8998_buck_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "BUCK2",
    + .id = MAX8998_BUCK2,
    + .ops = &max8998_buck_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "BUCK3",
    + .id = MAX8998_BUCK3,
    + .ops = &max8998_buck_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "BUCK4",
    + .id = MAX8998_BUCK4,
    + .ops = &max8998_buck_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "EN32KHz AP",
    + .id = MAX8998_EN32KHZ_AP,
    + .ops = &max8998_others_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "EN32KHz CP",
    + .id = MAX8998_EN32KHZ_CP,
    + .ops = &max8998_others_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "ENVICHG",
    + .id = MAX8998_ENVICHG,
    + .ops = &max8998_others_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "ESAFEOUT1",
    + .id = MAX8998_ESAFEOUT1,
    + .ops = &max8998_others_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }, {
    + .name = "ESAFEOUT2",
    + .id = MAX8998_ESAFEOUT2,
    + .ops = &max8998_others_ops,
    + .type = REGULATOR_VOLTAGE,
    + .owner = THIS_MODULE,
    + }
    +};
    +
    +static __devinit int max8998_pmic_probe(struct platform_device *pdev)
    +{
    + struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
    + struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
    + struct regulator_dev **rdev;
    + struct max8998_data *max8998;
    + int i, ret, size;
    +
    + if (!pdata) {
    + dev_err(pdev->dev.parent, "No platform init data supplied\n");
    + return -ENODEV;
    + }
    +
    + max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
    + if (!max8998)
    + return -ENOMEM;
    +
    + size = sizeof(struct regulator_dev *) * (pdata->num_regulators + 1);
    + max8998->rdev = kzalloc(size, GFP_KERNEL);
    + if (!max8998->rdev) {
    + kfree(max8998);
    + return -ENOMEM;
    + }
    +
    + rdev = max8998->rdev;
    + max8998->iodev = iodev;
    + platform_set_drvdata(pdev, max8998);
    +
    + for (i = 0; i < pdata->num_regulators; i++) {
    + const struct voltage_map_desc *desc;
    + int id = pdata->regulators[i].id;
    + int index = id - MAX8998_LDO2;
    +
    + desc = ldo_voltage_map[id];
    + if (desc && regulators[index].ops != &max8998_others_ops) {
    + int count = (desc->max - desc->min) / desc->step + 1;
    + regulators[index].n_voltages = count;
    + }
    + rdev[i] = regulator_register(&regulators[index], max8998->dev,
    + pdata->regulators[i].initdata, max8998);
    + if (IS_ERR(rdev[i])) {
    + ret = PTR_ERR(rdev[i]);
    + dev_err(max8998->dev, "regulator init failed\n");
    + rdev[i] = NULL;
    + goto err;
    + }
    + }
    +
    +
    + return 0;
    +err:
    + for (i = 0; i <= max8998->num_regulators; i++)
    + if (rdev[i])
    + regulator_unregister(rdev[i]);
    +
    + kfree(max8998->rdev);
    + kfree(max8998);
    +
    + return ret;
    +}
    +
    +static int __devexit max8998_pmic_remove(struct platform_device *pdev)
    +{
    + struct max8998_data *max8998 = platform_get_drvdata(pdev);
    + struct regulator_dev **rdev = max8998->rdev;
    + int i;
    +
    + for (i = 0; i <= max8998->num_regulators; i++)
    + if (rdev[i])
    + regulator_unregister(rdev[i]);
    +
    + kfree(max8998->rdev);
    + kfree(max8998);
    +
    + return 0;
    +}
    +
    +static struct platform_driver max8998_pmic_driver = {
    + .driver = {
    + .name = "max8998-pmic",
    + .owner = THIS_MODULE,
    + },
    + .probe = max8998_pmic_probe,
    + .remove = __devexit_p(max8998_pmic_remove),
    +};
    +
    +static int __init max8998_pmic_init(void)
    +{
    + return platform_driver_register(&max8998_pmic_driver);
    +}
    +subsys_initcall(max8998_pmic_init);
    +
    +static void __exit max8998_pmic_cleanup(void)
    +{
    + platform_driver_unregister(&max8998_pmic_driver);
    +}
    +module_exit(max8998_pmic_cleanup);
    +
    +MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
    +MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
    +MODULE_LICENSE("GPL");
    diff --git a/include/linux/mfd/max8998-private.h b/include/linux/mfd/max8998-private.h
    new file mode 100644
    index 0000000..6dc75b3
    --- /dev/null
    +++ b/include/linux/mfd/max8998-private.h
    @@ -0,0 +1,112 @@
    +/*
    + * max8698.h - Voltage regulator driver for the Maxim 8998
    + *
    + * Copyright (C) 2009-2010 Samsung Electrnoics
    + * Kyungmin Park <kyungmin.park@samsung.com>
    + * Marek Szyprowski <m.szyprowski@samsung.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.
    + *
    + * 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_MAX8998_PRIV_H
    +#define __LINUX_MFD_MAX8998_PRIV_H
    +
    +/* MAX 8998 registers */
    +enum {
    + MAX8998_REG_IRQ1,
    + MAX8998_REG_IRQ2,
    + MAX8998_REG_IRQ3,
    + MAX8998_REG_IRQ4,
    + MAX8998_REG_IRQM1,
    + MAX8998_REG_IRQM2,
    + MAX8998_REG_IRQM3,
    + MAX8998_REG_IRQM4,
    + MAX8998_REG_STATUS1,
    + MAX8998_REG_STATUS2,
    + MAX8998_REG_STATUSM1,
    + MAX8998_REG_STATUSM2,
    + MAX8998_REG_CHGR1,
    + MAX8998_REG_CHGR2,
    + MAX8998_REG_LDO_ACTIVE_DISCHARGE1,
    + MAX8998_REG_LDO_ACTIVE_DISCHARGE2,
    + MAX8998_REG_BUCK_ACTIVE_DISCHARGE3,
    + MAX8998_REG_ONOFF1,
    + MAX8998_REG_ONOFF2,
    + MAX8998_REG_ONOFF3,
    + MAX8998_REG_ONOFF4,
    + MAX8998_REG_BUCK1_DVSARM1,
    + MAX8998_REG_BUCK1_DVSARM2,
    + MAX8998_REG_BUCK1_DVSARM3,
    + MAX8998_REG_BUCK1_DVSARM4,
    + MAX8998_REG_BUCK2_DVSINT1,
    + MAX8998_REG_BUCK2_DVSINT2,
    + MAX8998_REG_BUCK3,
    + MAX8998_REG_BUCK4,
    + MAX8998_REG_LDO2_LDO3,
    + MAX8998_REG_LDO4,
    + MAX8998_REG_LDO5,
    + MAX8998_REG_LDO6,
    + MAX8998_REG_LDO7,
    + MAX8998_REG_LDO8_LDO9,
    + MAX8998_REG_LDO10_LDO11,
    + MAX8998_REG_LDO12,
    + MAX8998_REG_LDO13,
    + MAX8998_REG_LDO14,
    + MAX8998_REG_LDO15,
    + MAX8998_REG_LDO16,
    + MAX8998_REG_LDO17,
    + MAX8998_REG_BKCHR,
    + MAX8998_REG_LBCNFG1,
    + MAX8998_REG_LBCNFG2,
    +};
    +
    +/**
    + * struct max8998_dev - max8998 master device for sub-drivers
    + * @dev: master device of the chip (can be used to access platform data)
    + * @i2c_client: i2c client private data
    + * @dev_read(): chip register read function
    + * @dev_write(): chip register write function
    + * @dev_update(): chip register update function
    + * @iolock: mutex for serializing io access
    + */
    +
    +struct max8998_dev {
    + struct device *dev;
    + struct i2c_client *i2c_client;
    + int (*dev_read)(struct max8998_dev *max8998, u8 reg, u8 *dest);
    + int (*dev_write)(struct max8998_dev *max8998, u8 reg, u8 val);
    + int (*dev_update)(struct max8998_dev *max8998, u8 reg, u8 val, u8 mask);
    + struct mutex iolock;
    +};
    +
    +static inline int max8998_read_reg(struct max8998_dev *max8998, u8 reg,
    + u8 *value)
    +{
    + return max8998->dev_read(max8998, reg, value);
    +}
    +
    +static inline int max8998_write_reg(struct max8998_dev *max8998, u8 reg,
    + u8 value)
    +{
    + return max8998->dev_write(max8998, reg, value);
    +}
    +
    +static inline int max8998_update_reg(struct max8998_dev *max8998, u8 reg,
    + u8 value, u8 mask)
    +{
    + return max8998->dev_update(max8998, reg, value, mask);
    +}
    +
    +#endif /* __LINUX_MFD_MAX8998_PRIV_H */
    diff --git a/include/linux/mfd/max8998.h b/include/linux/mfd/max8998.h
    new file mode 100644
    index 0000000..1d3601a
    --- /dev/null
    +++ b/include/linux/mfd/max8998.h
    @@ -0,0 +1,78 @@
    +/*
    + * max8698.h - Voltage regulator driver for the Maxim 8998
    + *
    + * Copyright (C) 2009-2010 Samsung Electrnoics
    + * Kyungmin Park <kyungmin.park@samsung.com>
    + * Marek Szyprowski <m.szyprowski@samsung.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.
    + *
    + * 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_MAX8998_H
    +#define __LINUX_MFD_MAX8998_H
    +
    +#include <linux/regulator/machine.h>
    +
    +/* MAX 8998 regulator ids */
    +enum {
    + MAX8998_LDO2 = 2,
    + MAX8998_LDO3,
    + MAX8998_LDO4,
    + MAX8998_LDO5,
    + MAX8998_LDO6,
    + MAX8998_LDO7,
    + MAX8998_LDO8,
    + MAX8998_LDO9,
    + MAX8998_LDO10,
    + MAX8998_LDO11,
    + MAX8998_LDO12,
    + MAX8998_LDO13,
    + MAX8998_LDO14,
    + MAX8998_LDO15,
    + MAX8998_LDO16,
    + MAX8998_LDO17,
    + MAX8998_BUCK1,
    + MAX8998_BUCK2,
    + MAX8998_BUCK3,
    + MAX8998_BUCK4,
    + MAX8998_EN32KHZ_AP,
    + MAX8998_EN32KHZ_CP,
    + MAX8998_ENVICHG,
    + MAX8998_ESAFEOUT1,
    + MAX8998_ESAFEOUT2,
    +};
    +
    +/**
    + * max8998_regulator_data - regulator data
    + * @id: regulator id
    + * @initdata: regulator init data (contraints, supplies, ...)
    + */
    +struct max8998_regulator_data {
    + int id;
    + struct regulator_init_data *initdata;
    +};
    +
    +/**
    + * struct max8998_board - packages regulator init data
    + * @num_regulators: number of regultors used
    + * @regulators: array of defined regulators
    + */
    +
    +struct max8998_platform_data {
    + int num_regulators;
    + struct max8998_regulator_data *regulators;
    +};
    +
    +#endif /* __LINUX_MFD_MAX8998_H */
    --
    1.7.1.240.g225c


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