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c172708d38
linux-next/drivers/regulator/max8998.c
Mark Brown c172708d38 regulator: core: Use a struct to pass in regulator runtime configuration 
Rather than adding new arguments to regulator_register() every time we
want to add a new bit of dynamic information at runtime change the function
to take these via a struct. By doing this we avoid needing to do further
changes like the recent addition of device tree support which required each
regulator driver to be updated to take an additional parameter.

The regulator_desc which should (mostly) be static data is still passed
separately as most drivers are able to configure this statically at build
time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-09 12:37:09 +01:00

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/*
* 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/delay.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;
u8 buck1_vol[4]; /* voltages for selection */
u8 buck2_vol[2];
unsigned int buck1_idx; /* index to last changed voltage */
/* value in a set */
unsigned int buck2_idx;
};
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 int max8998_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
const struct voltage_map_desc *desc;
int ldo = rdev_get_id(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 = rdev_get_id(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);
struct i2c_client *i2c = max8998->iodev->i2c;
int ret, reg, shift = 8;
u8 val;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
ret = max8998_read_reg(i2c, 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);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 8, ret;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
return max8998_update_reg(i2c, reg, 1<<shift, 1<<shift);
}
static int max8998_ldo_disable(struct regulator_dev *rdev)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int reg, shift = 8, ret;
ret = max8998_get_enable_register(rdev, &reg, &shift);
if (ret)
return ret;
return max8998_update_reg(i2c, reg, 0, 1<<shift);
}
static int max8998_get_voltage_register(struct regulator_dev *rdev,
int *_reg, int *_shift, int *_mask)
{
int ldo = rdev_get_id(rdev);
struct max8998_data *max8998 = rdev_get_drvdata(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_VOLTAGE1 + max8998->buck1_idx;
break;
case MAX8998_BUCK2:
reg = MAX8998_REG_BUCK2_VOLTAGE1 + max8998->buck2_idx;
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);
struct i2c_client *i2c = max8998->iodev->i2c;
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(i2c, reg, &val);
if (ret)
return ret;
val >>= shift;
val &= mask;
return max8998_list_voltage(rdev, val);
}
static int max8998_set_voltage_ldo(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct i2c_client *i2c = max8998->iodev->i2c;
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
const struct voltage_map_desc *desc;
int ldo = rdev_get_id(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 < min_vol &&
desc->min + desc->step*i < desc->max)
i++;
if (desc->min + desc->step*i > max_vol)
return -EINVAL;
*selector = i;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
return ret;
}
static inline void buck1_gpio_set(int gpio1, int gpio2, int v)
{
gpio_set_value(gpio1, v & 0x1);
gpio_set_value(gpio2, (v >> 1) & 0x1);
}
static inline void buck2_gpio_set(int gpio, int v)
{
gpio_set_value(gpio, v & 0x1);
}
static int max8998_set_voltage_buck(struct regulator_dev *rdev,
int min_uV, int max_uV, unsigned *selector)
{
struct max8998_data *max8998 = rdev_get_drvdata(rdev);
struct max8998_platform_data *pdata =
dev_get_platdata(max8998->iodev->dev);
struct i2c_client *i2c = max8998->iodev->i2c;
int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
const struct voltage_map_desc *desc;
int buck = rdev_get_id(rdev);
int reg, shift = 0, mask, ret;
int difference = 0, i = 0, j = 0, previous_vol = 0;
u8 val = 0;
static u8 buck1_last_val;
if (buck >= ARRAY_SIZE(ldo_voltage_map))
return -EINVAL;
desc = ldo_voltage_map[buck];
if (desc == NULL)
return -EINVAL;
if (max_vol < desc->min || min_vol > desc->max)
return -EINVAL;
while (desc->min + desc->step*i < min_vol &&
desc->min + desc->step*i < desc->max)
i++;
if (desc->min + desc->step*i > max_vol)
return -EINVAL;
*selector = i;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
previous_vol = max8998_get_voltage(rdev);
/* Check if voltage needs to be changed */
/* if previous_voltage equal new voltage, return */
if (previous_vol == max8998_list_voltage(rdev, i)) {
dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
previous_vol, max8998_list_voltage(rdev, i));
return ret;
}
switch (buck) {
case MAX8998_BUCK1:
dev_dbg(max8998->dev,
"BUCK1, i:%d, buck1_vol1:%d, buck1_vol2:%d\n"
"buck1_vol3:%d, buck1_vol4:%d\n",
i, max8998->buck1_vol[0], max8998->buck1_vol[1],
max8998->buck1_vol[2], max8998->buck1_vol[3]);
if (gpio_is_valid(pdata->buck1_set1) &&
gpio_is_valid(pdata->buck1_set2)) {
/* check if requested voltage */
/* value is already defined */
for (j = 0; j < ARRAY_SIZE(max8998->buck1_vol); j++) {
if (max8998->buck1_vol[j] == i) {
max8998->buck1_idx = j;
buck1_gpio_set(pdata->buck1_set1,
pdata->buck1_set2, j);
goto buck1_exit;
}
}
if (pdata->buck_voltage_lock)
return -EINVAL;
/* no predefine regulator found */
max8998->buck1_idx = (buck1_last_val % 2) + 2;
dev_dbg(max8998->dev, "max8998->buck1_idx:%d\n",
max8998->buck1_idx);
max8998->buck1_vol[max8998->buck1_idx] = i;
ret = max8998_get_voltage_register(rdev, &reg,
&shift,
&mask);
ret = max8998_write_reg(i2c, reg, i);
buck1_gpio_set(pdata->buck1_set1,
pdata->buck1_set2, max8998->buck1_idx);
buck1_last_val++;
buck1_exit:
dev_dbg(max8998->dev, "%s: SET1:%d, SET2:%d\n",
i2c->name, gpio_get_value(pdata->buck1_set1),
gpio_get_value(pdata->buck1_set2));
break;
} else {
ret = max8998_write_reg(i2c, reg, i);
}
break;
case MAX8998_BUCK2:
dev_dbg(max8998->dev,
"BUCK2, i:%d buck2_vol1:%d, buck2_vol2:%d\n"
, i, max8998->buck2_vol[0], max8998->buck2_vol[1]);
if (gpio_is_valid(pdata->buck2_set3)) {
/* check if requested voltage */
/* value is already defined */
for (j = 0; j < ARRAY_SIZE(max8998->buck2_vol); j++) {
if (max8998->buck2_vol[j] == i) {
max8998->buck2_idx = j;
buck2_gpio_set(pdata->buck2_set3, j);
goto buck2_exit;
}
}
if (pdata->buck_voltage_lock)
return -EINVAL;
max8998_get_voltage_register(rdev,
&reg, &shift, &mask);
ret = max8998_write_reg(i2c, reg, i);
max8998->buck2_vol[max8998->buck2_idx] = i;
buck2_gpio_set(pdata->buck2_set3, max8998->buck2_idx);
buck2_exit:
dev_dbg(max8998->dev, "%s: SET3:%d\n", i2c->name,
gpio_get_value(pdata->buck2_set3));
} else {
ret = max8998_write_reg(i2c, reg, i);
}
break;
case MAX8998_BUCK3:
case MAX8998_BUCK4:
ret = max8998_update_reg(i2c, reg, i<<shift, mask<<shift);
break;
}
/* Voltage stabilization */
max8998_read_reg(i2c, MAX8998_REG_ONOFF4, &val);
/* lp3974 hasn't got ENRAMP bit - ramp is assumed as true */
/* MAX8998 has ENRAMP bit implemented, so test it*/
if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
return ret;
difference = desc->min + desc->step*i - previous_vol/1000;
if (difference > 0)
udelay(difference / ((val & 0x0f) + 1));
return ret;
}
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_ldo,
.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_buck,
.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_config config = { };
struct regulator_dev **rdev;
struct max8998_data *max8998;
struct i2c_client *i2c;
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;
max8998->rdev = kzalloc(size, GFP_KERNEL);
if (!max8998->rdev) {
kfree(max8998);
return -ENOMEM;
}
rdev = max8998->rdev;
max8998->dev = &pdev->dev;
max8998->iodev = iodev;
max8998->num_regulators = pdata->num_regulators;
platform_set_drvdata(pdev, max8998);
i2c = max8998->iodev->i2c;
max8998->buck1_idx = pdata->buck1_default_idx;
max8998->buck2_idx = pdata->buck2_default_idx;
/* NOTE: */
/* For unused GPIO NOT marked as -1 (thereof equal to 0) WARN_ON */
/* will be displayed */
/* Check if MAX8998 voltage selection GPIOs are defined */
if (gpio_is_valid(pdata->buck1_set1) &&
gpio_is_valid(pdata->buck1_set2)) {
/* Check if SET1 is not equal to 0 */
if (!pdata->buck1_set1) {
printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set1);
ret = -EIO;
goto err_free_mem;
}
/* Check if SET2 is not equal to 0 */
if (!pdata->buck1_set2) {
printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set2);
ret = -EIO;
goto err_free_mem;
}
gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
gpio_direction_output(pdata->buck1_set1,
max8998->buck1_idx & 0x1);
gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
gpio_direction_output(pdata->buck1_set2,
(max8998->buck1_idx >> 1) & 0x1);
/* Set predefined value for BUCK1 register 1 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage1 / 1000))
i++;
max8998->buck1_vol[0] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
if (ret)
goto err_free_mem;
/* Set predefined value for BUCK1 register 2 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage2 / 1000))
i++;
max8998->buck1_vol[1] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
if (ret)
goto err_free_mem;
/* Set predefined value for BUCK1 register 3 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage3 / 1000))
i++;
max8998->buck1_vol[2] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
if (ret)
goto err_free_mem;
/* Set predefined value for BUCK1 register 4 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage4 / 1000))
i++;
max8998->buck1_vol[3] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
if (ret)
goto err_free_mem;
}
if (gpio_is_valid(pdata->buck2_set3)) {
/* Check if SET3 is not equal to 0 */
if (!pdata->buck2_set3) {
printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck2_set3);
ret = -EIO;
goto err_free_mem;
}
gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
gpio_direction_output(pdata->buck2_set3,
max8998->buck2_idx & 0x1);
/* BUCK2 register 1 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck2_voltage1 / 1000))
i++;
max8998->buck2_vol[0] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
if (ret)
goto err_free_mem;
/* BUCK2 register 2 */
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck2_voltage2 / 1000))
i++;
max8998->buck2_vol[1] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
if (ret)
goto err_free_mem;
}
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;
}
config.dev = max8998->dev;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = max8998;
rdev[i] = regulator_register(&regulators[index], &config);
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]);
err_free_mem:
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 const struct platform_device_id max8998_pmic_id[] = {
{ "max8998-pmic", TYPE_MAX8998 },
{ "lp3974-pmic", TYPE_LP3974 },
{ }
};
MODULE_DEVICE_TABLE(platform, max8998_pmic_id);
static struct platform_driver max8998_pmic_driver = {
.driver = {
.name = "max8998-pmic",
.owner = THIS_MODULE,
},
.probe = max8998_pmic_probe,
.remove = __devexit_p(max8998_pmic_remove),
.id_table = max8998_pmic_id,
};
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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