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android_kernel_samsung_on5x.../drivers/regulator/s2mpw01-regulator.c
awab228 f6dfaef42e Fixed MTP to work with TWRP
2018-06-19 23:16:04 +02:00

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/*
* s2mpw01-regulator.c
*
* Copyright (c) 2015 Samsung Electronics Co., Ltd
* http://www.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.
*
*/
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/mfd/samsung/s2mpw01.h>
#include <linux/mfd/samsung/s2mpw01-private.h>
#include <linux/io.h>
#include <linux/debugfs.h>
static unsigned int sel2volt(int id, unsigned int sel, unsigned int mask);
static struct s2mpw01_info *static_info;
#ifdef CONFIG_DEBUG_FS
static u8 i2caddr;
static u8 i2cdata;
static struct i2c_client *dbgi2c;
static struct dentry *s2mpw01_root;
static struct dentry *s2mpw01_i2caddr;
static struct dentry *s2mpw01_i2cdata;
#endif
struct s2mpw01_info {
struct regulator_dev *rdev[S2MPW01_REGULATOR_MAX];
u8 opmode[S2MPW01_REGULATOR_MAX];
int num_regulators;
struct i2c_client *i2c;
struct s2mpw01_dev *iodev;
unsigned int vsel_value[S2MPW01_REGULATOR_MAX];
bool cache_data;
};
#ifdef CONFIG_EXYNOS_SNAPSHOT_REGULATOR
static char *rdev_name(struct regulator_dev *rdev)
{
if (rdev->desc->name)
return (char *)rdev->desc->name;
else if (rdev->constraints && rdev->constraints->name)
return (char *)rdev->constraints->name;
else
return "";
}
#endif
/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
static int s2m_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
u8 val;
int ret, id = rdev_get_id(rdev);
switch (mode) {
case SEC_OPMODE_SUSPEND: /* ON in Standby Mode */
val = 0x1 << S2MPW01_ENABLE_SHIFT;
break;
case SEC_OPMODE_LOWPOWER:
val = 0x2 << S2MPW01_ENABLE_SHIFT; /* ON in LowPower Mode */
break;
case SEC_OPMODE_ON: /* ON in Normal Mode */
val = 0x3 << S2MPW01_ENABLE_SHIFT;
break;
default:
pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
rdev->desc->name, mode);
return -EINVAL;
}
ret = s2mpw01_update_reg(s2mpw01->i2c, rdev->desc->enable_reg,
val, rdev->desc->enable_mask);
if (ret)
return ret;
s2mpw01->opmode[id] = val;
return 0;
}
static int s2m_enable(struct regulator_dev *rdev)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
u8 reg = S2MPW01_PMIC_REG_EXT_CTRL, val, mask;
switch (id) {
case S2MPW01_LDO19:
val = mask = 1;
break;
case S2MPW01_LDO8:
val = mask = 2;
break;
case S2MPW01_LDO9:
val = mask = 4;
break;
default:
reg = rdev->desc->enable_reg;
val = s2mpw01->opmode[id];
mask = rdev->desc->enable_mask;
break;
}
return s2mpw01_update_reg(s2mpw01->i2c, reg, val, mask);
}
static int s2m_disable_regmap(struct regulator_dev *rdev)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
u8 reg = S2MPW01_PMIC_REG_EXT_CTRL, val = 0, mask;
switch (id) {
case S2MPW01_LDO19:
mask = 1;
break;
case S2MPW01_LDO8:
mask = 2;
break;
case S2MPW01_LDO9:
mask = 4;
break;
default:
reg = rdev->desc->enable_reg;
val = rdev->desc->enable_is_inverted ?
rdev->desc->enable_mask : 0;
mask = rdev->desc->enable_mask;
break;
}
return s2mpw01_update_reg(s2mpw01->i2c, reg, val, mask);
}
static int s2m_is_enabled_regmap(struct regulator_dev *rdev)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
u8 reg = S2MPW01_PMIC_REG_EXT_CTRL, val, mask;
switch (id) {
case S2MPW01_LDO19:
mask = 1;
break;
case S2MPW01_LDO8:
mask = 2;
break;
case S2MPW01_LDO9:
mask = 4;
break;
default:
reg = rdev->desc->enable_reg;
mask = rdev->desc->enable_mask;
break;
}
ret = s2mpw01_read_reg(s2mpw01->i2c, reg, &val);
if (ret)
return ret;
return rdev->desc->enable_is_inverted ?
!(val & mask) : !!(val & mask);
}
static int get_ramp_delay(int ramp_delay)
{
unsigned char cnt = 0;
ramp_delay /= 6;
while (true) {
ramp_delay = ramp_delay >> 1;
if (ramp_delay == 0)
break;
cnt++;
}
return cnt;
}
static int s2m_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int ramp_shift, reg_id = rdev_get_id(rdev);
u8 ramp_mask = 0x03;
u8 ramp_value = 0;
ramp_value = get_ramp_delay(ramp_delay/1000);
if (ramp_value > 4) {
pr_warn("%s: ramp_delay: %d not supported\n",
rdev->desc->name, ramp_delay);
}
switch (reg_id) {
case S2MPW01_BUCK1:
ramp_shift = 6;
break;
case S2MPW01_LDO2:
ramp_shift = 2;
break;
case S2MPW01_LDO1:
ramp_shift = 0;
break;
default:
return 0;
}
return s2mpw01_update_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_RAMP,
ramp_value << ramp_shift, ramp_mask << ramp_shift);
}
static int s2m_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int ret;
u8 val;
ret = s2mpw01_read_reg(s2mpw01->i2c, rdev->desc->vsel_reg, &val);
if (ret)
return ret;
val &= rdev->desc->vsel_mask;
return val;
}
static int s2m_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
{
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int ret;
int reg_id = rdev_get_id(rdev);
unsigned int volt;
volt = sel2volt(reg_id, sel, rdev->desc->vsel_mask);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_IN);
ret = s2mpw01_update_reg(s2mpw01->i2c, rdev->desc->vsel_reg,
sel, rdev->desc->vsel_mask);
if (ret < 0)
goto out;
if (rdev->desc->apply_bit)
ret = s2mpw01_update_reg(s2mpw01->i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_OUT);
return ret;
out:
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_ON);
return ret;
}
static int s2m_set_voltage_sel_regmap_buck(struct regulator_dev *rdev,
unsigned sel)
{
int ret;
struct s2mpw01_info *s2mpw01 = rdev_get_drvdata(rdev);
int reg_id = rdev_get_id(rdev);
unsigned int volt;
volt = sel2volt(reg_id, sel, rdev->desc->vsel_mask);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_IN);
ret = s2mpw01_write_reg(s2mpw01->i2c, rdev->desc->vsel_reg, sel);
if (ret < 0)
goto out;
if (rdev->desc->apply_bit)
ret = s2mpw01_update_reg(s2mpw01->i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_OUT);
return ret;
out:
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
exynos_ss_regulator(rdev_name(rdev), rdev->desc->vsel_reg, volt, ESS_FLAG_ON);
return ret;
}
static int s2m_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
unsigned int ramp_delay = 0;
int old_volt, new_volt;
if (rdev->constraints->ramp_delay)
ramp_delay = rdev->constraints->ramp_delay;
else if (rdev->desc->ramp_delay)
ramp_delay = rdev->desc->ramp_delay;
if (ramp_delay == 0) {
pr_warn("%s: ramp_delay not set\n", rdev->desc->name);
return -EINVAL;
}
/* sanity check */
if (!rdev->desc->ops->list_voltage)
return -EINVAL;
old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
if (old_selector < new_selector)
return DIV_ROUND_UP(new_volt - old_volt, ramp_delay);
return 0;
}
u32 pmic_rev_get(void)
{
return SEC_PMIC_REV(static_info->iodev);
}
static struct regulator_ops s2mpw01_ldo_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = s2m_is_enabled_regmap,
.enable = s2m_enable,
.disable = s2m_disable_regmap,
.get_voltage_sel = s2m_get_voltage_sel_regmap,
.set_voltage_sel = s2m_set_voltage_sel_regmap,
.set_voltage_time_sel = s2m_set_voltage_time_sel,
.set_mode = s2m_set_mode,
};
static struct regulator_ops s2mpw01_buck_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = s2m_is_enabled_regmap,
.enable = s2m_enable,
.disable = s2m_disable_regmap,
.get_voltage_sel = s2m_get_voltage_sel_regmap,
.set_voltage_sel = s2m_set_voltage_sel_regmap_buck,
.set_voltage_time_sel = s2m_set_voltage_time_sel,
.set_mode = s2m_set_mode,
.set_ramp_delay = s2m_set_ramp_delay,
};
#define _BUCK(macro) S2MPW01_BUCK##macro
#define _buck_ops(num) s2mpw01_buck_ops##num
#define _LDO(macro) S2MPW01_LDO##macro
#define _REG(ctrl) S2MPW01_PMIC_REG##ctrl
#define _ldo_ops(num) s2mpw01_ldo_ops##num
#define _TIME(macro) S2MPW01_ENABLE_TIME##macro
#define BUCK_DESC(_name, _id, _ops, m, s, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2MPW01_BUCK_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPW01_BUCK_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPW01_ENABLE_MASK, \
.enable_time = t \
}
#define LDO_DESC(_name, _id, _ops, m, s, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2MPW01_LDO_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPW01_LDO_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPW01_ENABLE_MASK, \
.enable_time = t \
}
static struct regulator_desc regulators[S2MPW01_REGULATOR_MAX] = {
/* name, id, ops, min_uv, uV_step, vsel_reg, enable_reg */
LDO_DESC("LDO1", _LDO(1), &_ldo_ops(), _LDO(_MIN1), _LDO(_STEP2),
_REG(_L1CTRL2), _REG(_L1CTRL1), _TIME(_LDO)),
LDO_DESC("LDO2", _LDO(2), &_ldo_ops(), _LDO(_MIN1), _LDO(_STEP2),
_REG(_L2CTRL2), _REG(_L2CTRL1), _TIME(_LDO)),
LDO_DESC("LDO3", _LDO(3), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L3CTRL), _REG(_L3CTRL), _TIME(_LDO)),
LDO_DESC("LDO4", _LDO(4), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP1),
_REG(_L4CTRL), _REG(_L4CTRL), _TIME(_LDO)),
LDO_DESC("LDO5", _LDO(5), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP1),
_REG(_L5CTRL), _REG(_L5CTRL), _TIME(_LDO)),
LDO_DESC("LDO6", _LDO(6), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L6CTRL), _REG(_L6CTRL), _TIME(_LDO)),
LDO_DESC("LDO7", _LDO(7), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP1),
_REG(_L7CTRL), _REG(_L7CTRL), _TIME(_LDO)),
LDO_DESC("LDO8", _LDO(8), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L8CTRL), _REG(_L8CTRL), _TIME(_LDO)),
LDO_DESC("LDO9", _LDO(9), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L9CTRL), _REG(_L9CTRL), _TIME(_LDO)),
LDO_DESC("LDO10", _LDO(10), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L10CTRL), _REG(_L10CTRL), _TIME(_LDO)),
LDO_DESC("LDO11", _LDO(11), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L11CTRL), _REG(_L11CTRL), _TIME(_LDO)),
LDO_DESC("LDO12", _LDO(12), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L12CTRL), _REG(_L12CTRL), _TIME(_LDO)),
LDO_DESC("LDO13", _LDO(13), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L13CTRL), _REG(_L13CTRL), _TIME(_LDO)),
LDO_DESC("LDO14", _LDO(14), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L14CTRL), _REG(_L14CTRL), _TIME(_LDO)),
LDO_DESC("LDO15", _LDO(15), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L15CTRL), _REG(_L15CTRL), _TIME(_LDO)),
LDO_DESC("LDO16", _LDO(16), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L16CTRL), _REG(_L16CTRL), _TIME(_LDO)),
LDO_DESC("LDO17", _LDO(17), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L17CTRL), _REG(_L17CTRL), _TIME(_LDO)),
LDO_DESC("LDO18", _LDO(18), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L18CTRL), _REG(_L18CTRL), _TIME(_LDO)),
LDO_DESC("LDO19", _LDO(19), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L19CTRL), _REG(_L19CTRL), _TIME(_LDO)),
LDO_DESC("LDO20", _LDO(20), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L20CTRL), _REG(_L20CTRL), _TIME(_LDO)),
LDO_DESC("LDO21", _LDO(21), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP2),
_REG(_L21CTRL), _REG(_L21CTRL), _TIME(_LDO)),
LDO_DESC("LDO22", _LDO(22), &_ldo_ops(), _LDO(_MIN2), _LDO(_STEP1),
_REG(_L22CTRL), _REG(_L22CTRL), _TIME(_LDO)),
LDO_DESC("LDO23", _LDO(23), &_ldo_ops(), _LDO(_MIN3), _LDO(_STEP2),
_REG(_L23CTRL), _REG(_L23CTRL), _TIME(_LDO)),
BUCK_DESC("BUCK1", _BUCK(1), &_buck_ops(), _BUCK(_MIN1), _BUCK(_STEP1),
_REG(_B1OUT2), _REG(_B1CTRL), _TIME(_BUCK1)),
BUCK_DESC("BUCK3", _BUCK(3), &_buck_ops(), _BUCK(_MIN2), _BUCK(_STEP2),
_REG(_B3CTRL2), _REG(_B3CTRL1), _TIME(_BUCK3)),
BUCK_DESC("BUCK4", _BUCK(4), &_buck_ops(), _BUCK(_MIN2), _BUCK(_STEP2),
_REG(_B4CTRL2), _REG(_B4CTRL1), _TIME(_BUCK4)),
};
static unsigned int sel2volt(int id, unsigned int sel, unsigned int mask)
{
return ((sel & mask) * regulators[id].uV_step) + regulators[id].min_uV;
}
#ifdef CONFIG_OF
static struct of_device_id s2mpw01_of_match[] = {
{
.compatible = "s2mpw01-regulator",
},
{},
};
static int s2mpw01_pmic_dt_parse_pdata(struct s2mpw01_dev *iodev,
struct s2mpw01_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np, *reg_np;
struct s2mpw01_regulator_data *rdata;
unsigned int i;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
dev_err(iodev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
regulators_np = of_find_node_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
/* count the number of regulators to be supported in pmic */
pdata->num_regulators = 0;
for_each_child_of_node(regulators_np, reg_np) {
pdata->num_regulators++;
}
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
pdata->regulators = rdata;
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(regulators); i++)
if (!of_node_cmp(reg_np->name,
regulators[i].name))
break;
if (i == ARRAY_SIZE(regulators)) {
dev_warn(iodev->dev,
"don't know how to configure regulator %s\n",
reg_np->name);
continue;
}
rdata->id = i;
rdata->initdata = of_get_regulator_init_data(
iodev->dev, reg_np);
rdata->reg_node = reg_np;
rdata++;
}
return 0;
}
#else
static int s2mpw01_pmic_dt_parse_pdata(struct s2mpw01_dev *iodev,
struct s2mpw01_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#ifdef CONFIG_DEBUG_FS
static ssize_t s2mpw01_i2caddr_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[10];
ssize_t ret;
ret = snprintf(buf, sizeof(buf), "0x%x\n", i2caddr);
if (ret < 0)
return ret;
return simple_read_from_buffer(user_buf, count, ppos, buf, ret);
}
static ssize_t s2mpw01_i2caddr_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[10];
ssize_t len;
u8 val;
len = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
if (len < 0)
return len;
buf[len] = '\0';
if (!kstrtou8(buf, 0, &val))
i2caddr = val;
return len;
}
static ssize_t s2mpw01_i2cdata_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[10];
ssize_t ret;
ret = s2mpw01_read_reg(dbgi2c, i2caddr, &i2cdata);
if (ret)
return ret;
ret = snprintf(buf, sizeof(buf), "0x%x\n", i2cdata);
if (ret < 0)
return ret;
return simple_read_from_buffer(user_buf, count, ppos, buf, ret);
}
static ssize_t s2mpw01_i2cdata_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[10];
ssize_t len, ret;
u8 val;
len = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
if (len < 0)
return len;
buf[len] = '\0';
if (!kstrtou8(buf, 0, &val)) {
ret = s2mpw01_write_reg(dbgi2c, i2caddr, val);
if (ret < 0)
return ret;
}
return len;
}
static const struct file_operations s2mpw01_i2caddr_fops = {
.open = simple_open,
.read = s2mpw01_i2caddr_read,
.write = s2mpw01_i2caddr_write,
.llseek = default_llseek,
};
static const struct file_operations s2mpw01_i2cdata_fops = {
.open = simple_open,
.read = s2mpw01_i2cdata_read,
.write = s2mpw01_i2cdata_write,
.llseek = default_llseek,
};
#endif
static int s2mpw01_pmic_probe(struct platform_device *pdev)
{
struct s2mpw01_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct s2mpw01_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
struct s2mpw01_info *s2mpw01;
int i, ret;
if (iodev->dev->of_node) {
ret = s2mpw01_pmic_dt_parse_pdata(iodev, pdata);
if (ret)
return ret;
}
if (!pdata) {
dev_err(pdev->dev.parent, "Platform data not supplied\n");
return -ENODEV;
}
s2mpw01 = devm_kzalloc(&pdev->dev, sizeof(struct s2mpw01_info),
GFP_KERNEL);
if (!s2mpw01)
return -ENOMEM;
s2mpw01->iodev = iodev;
s2mpw01->i2c = iodev->pmic;
static_info = s2mpw01;
platform_set_drvdata(pdev, s2mpw01);
for (i = 0; i < pdata->num_regulators; i++) {
int id = pdata->regulators[i].id;
config.dev = &pdev->dev;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = s2mpw01;
config.of_node = pdata->regulators[i].reg_node;
s2mpw01->opmode[id] = regulators[id].enable_mask;
s2mpw01->rdev[i] = regulator_register(&regulators[id], &config);
if (IS_ERR(s2mpw01->rdev[i])) {
ret = PTR_ERR(s2mpw01->rdev[i]);
dev_err(&pdev->dev, "regulator init failed for %d\n",
i);
s2mpw01->rdev[i] = NULL;
goto err;
}
}
s2mpw01->num_regulators = pdata->num_regulators;
#ifdef CONFIG_DEBUG_FS
dbgi2c = s2mpw01->i2c;
s2mpw01_root = debugfs_create_dir("s2mpw01-regs", NULL);
s2mpw01_i2caddr = debugfs_create_file("i2caddr", 0644, s2mpw01_root, NULL, &s2mpw01_i2caddr_fops);
s2mpw01_i2cdata = debugfs_create_file("i2cdata", 0644, s2mpw01_root, NULL, &s2mpw01_i2cdata_fops);
#endif
return 0;
err:
for (i = 0; i < S2MPW01_REGULATOR_MAX; i++)
regulator_unregister(s2mpw01->rdev[i]);
return ret;
}
static int s2mpw01_pmic_remove(struct platform_device *pdev)
{
struct s2mpw01_info *s2mpw01 = platform_get_drvdata(pdev);
int i;
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(s2mpw01_i2cdata);
debugfs_remove_recursive(s2mpw01_i2caddr);
debugfs_remove_recursive(s2mpw01_root);
#endif
for (i = 0; i < S2MPW01_REGULATOR_MAX; i++)
regulator_unregister(s2mpw01->rdev[i]);
return 0;
}
static const struct platform_device_id s2mpw01_pmic_id[] = {
{ "s2mpw01-regulator", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, s2mpw01_pmic_id);
#define SYNC_ON 0x4
#define SYNC_OFF 0x0
static int s2mpw01_pmic_suspend(struct device *dev)
{
struct platform_device *pdev = container_of(dev, struct platform_device, dev);
struct s2mpw01_info *s2mpw01 = platform_get_drvdata(pdev);
s2mpw01_update_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_L1DVS, SYNC_OFF, 0x4);
s2mpw01_write_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_B3CTRL2, 0x34); /* 1.25V */
s2mpw01_write_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_B4CTRL2, 0x64); /* 1.85V */
return 0;
}
static int s2mpw01_pmic_resume(struct device *dev)
{
struct platform_device *pdev = container_of(dev, struct platform_device, dev);
struct s2mpw01_info *s2mpw01 = platform_get_drvdata(pdev);
s2mpw01_update_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_L1DVS, SYNC_ON, 0x4);
s2mpw01_write_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_B3CTRL2, 0x3C); /* 1.35V */
s2mpw01_write_reg(s2mpw01->i2c, S2MPW01_PMIC_REG_B4CTRL2, 0x70); /* 2V */
return 0;
}
static const struct dev_pm_ops s2mpw01_pmic_pm_ops = {
.suspend_late = s2mpw01_pmic_suspend,
.resume_early = s2mpw01_pmic_resume,
};
static struct platform_driver s2mpw01_pmic_driver = {
.driver = {
.name = "s2mpw01-regulator",
.owner = THIS_MODULE,
.pm = &s2mpw01_pmic_pm_ops,
#ifdef CONFIG_OF
.of_match_table = of_match_ptr(s2mpw01_of_match),
#endif
},
.probe = s2mpw01_pmic_probe,
.remove = s2mpw01_pmic_remove,
.id_table = s2mpw01_pmic_id,
};
static int __init s2mpw01_pmic_init(void)
{
return platform_driver_register(&s2mpw01_pmic_driver);
}
subsys_initcall(s2mpw01_pmic_init);
static void __exit s2mpw01_pmic_exit(void)
{
platform_driver_unregister(&s2mpw01_pmic_driver);
}
module_exit(s2mpw01_pmic_exit);
/* Module information */
MODULE_AUTHOR("Samsung LSI");
MODULE_DESCRIPTION("SAMSUNG S2MPW01 Regulator Driver");
MODULE_LICENSE("GPL");
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