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drivers: regulator: add Maxim 8998 driver

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Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.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>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
This commit is contained in:
Kyungmin Park 2010-06-16 09:04:16 +02:00 committed by Liam Girdwood
parent 51bd6943cd
commit 156f252857
8 changed files with 981 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/mfd/Kconfig
View File

@ -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

1
drivers/mfd/Makefile
View File

@ -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

160
drivers/mfd/max8998.c Normal file
View File

@ -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");

9
drivers/regulator/Kconfig
View File

@ -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

1
drivers/regulator/Makefile
View File

@ -17,6 +17,7 @@ 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

610
drivers/regulator/max8998.c Normal file
View File

@ -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");

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/*
* 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 */

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/*
* 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 */