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linux/drivers/regulator/s5m8767.c
Axel Lin e81d7bc89c regulator: s5m8767: Prevent possible NULL pointer dereference 
s5m8767_pmic_dt_parse_pdata dereferenes pdata, thus check pdata earlier to
avoid NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2013-02-13 12:52:19 +00:00

977 lines
25 KiB
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/*
* s5m8767.c
*
* Copyright (c) 2011 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/err.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/s5m8767.h>
#include <linux/regulator/of_regulator.h>
#define S5M8767_OPMODE_NORMAL_MODE 0x1
struct s5m8767_info {
struct device *dev;
struct sec_pmic_dev *iodev;
int num_regulators;
struct regulator_dev **rdev;
struct sec_opmode_data *opmode;
int ramp_delay;
bool buck2_ramp;
bool buck3_ramp;
bool buck4_ramp;
bool buck2_gpiodvs;
bool buck3_gpiodvs;
bool buck4_gpiodvs;
u8 buck2_vol[8];
u8 buck3_vol[8];
u8 buck4_vol[8];
int buck_gpios[3];
int buck_ds[3];
int buck_gpioindex;
};
struct sec_voltage_desc {
int max;
int min;
int step;
};
static const struct sec_voltage_desc buck_voltage_val1 = {
.max = 2225000,
.min = 650000,
.step = 6250,
};
static const struct sec_voltage_desc buck_voltage_val2 = {
.max = 1600000,
.min = 600000,
.step = 6250,
};
static const struct sec_voltage_desc buck_voltage_val3 = {
.max = 3000000,
.min = 750000,
.step = 12500,
};
static const struct sec_voltage_desc ldo_voltage_val1 = {
.max = 3950000,
.min = 800000,
.step = 50000,
};
static const struct sec_voltage_desc ldo_voltage_val2 = {
.max = 2375000,
.min = 800000,
.step = 25000,
};
static const struct sec_voltage_desc *reg_voltage_map[] = {
[S5M8767_LDO1] = &ldo_voltage_val2,
[S5M8767_LDO2] = &ldo_voltage_val2,
[S5M8767_LDO3] = &ldo_voltage_val1,
[S5M8767_LDO4] = &ldo_voltage_val1,
[S5M8767_LDO5] = &ldo_voltage_val1,
[S5M8767_LDO6] = &ldo_voltage_val2,
[S5M8767_LDO7] = &ldo_voltage_val2,
[S5M8767_LDO8] = &ldo_voltage_val2,
[S5M8767_LDO9] = &ldo_voltage_val1,
[S5M8767_LDO10] = &ldo_voltage_val1,
[S5M8767_LDO11] = &ldo_voltage_val1,
[S5M8767_LDO12] = &ldo_voltage_val1,
[S5M8767_LDO13] = &ldo_voltage_val1,
[S5M8767_LDO14] = &ldo_voltage_val1,
[S5M8767_LDO15] = &ldo_voltage_val2,
[S5M8767_LDO16] = &ldo_voltage_val1,
[S5M8767_LDO17] = &ldo_voltage_val1,
[S5M8767_LDO18] = &ldo_voltage_val1,
[S5M8767_LDO19] = &ldo_voltage_val1,
[S5M8767_LDO20] = &ldo_voltage_val1,
[S5M8767_LDO21] = &ldo_voltage_val1,
[S5M8767_LDO22] = &ldo_voltage_val1,
[S5M8767_LDO23] = &ldo_voltage_val1,
[S5M8767_LDO24] = &ldo_voltage_val1,
[S5M8767_LDO25] = &ldo_voltage_val1,
[S5M8767_LDO26] = &ldo_voltage_val1,
[S5M8767_LDO27] = &ldo_voltage_val1,
[S5M8767_LDO28] = &ldo_voltage_val1,
[S5M8767_BUCK1] = &buck_voltage_val1,
[S5M8767_BUCK2] = &buck_voltage_val2,
[S5M8767_BUCK3] = &buck_voltage_val2,
[S5M8767_BUCK4] = &buck_voltage_val2,
[S5M8767_BUCK5] = &buck_voltage_val1,
[S5M8767_BUCK6] = &buck_voltage_val1,
[S5M8767_BUCK7] = NULL,
[S5M8767_BUCK8] = NULL,
[S5M8767_BUCK9] = &buck_voltage_val3,
};
static unsigned int s5m8767_opmode_reg[][4] = {
/* {OFF, ON, LOWPOWER, SUSPEND} */
/* LDO1 ... LDO28 */
{0x0, 0x3, 0x2, 0x1}, /* LDO1 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1}, /* LDO5 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO10 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO15 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO20 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x0, 0x0, 0x0},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO25 */
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* LDO28 */
/* BUCK1 ... BUCK9 */
{0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1},
{0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
};
static int s5m8767_get_register(struct regulator_dev *rdev, int *reg,
int *enable_ctrl)
{
int i, reg_id = rdev_get_id(rdev);
unsigned int mode;
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
switch (reg_id) {
case S5M8767_LDO1 ... S5M8767_LDO2:
*reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
break;
case S5M8767_LDO3 ... S5M8767_LDO28:
*reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
break;
case S5M8767_BUCK1:
*reg = S5M8767_REG_BUCK1CTRL1;
break;
case S5M8767_BUCK2 ... S5M8767_BUCK4:
*reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
break;
case S5M8767_BUCK5:
*reg = S5M8767_REG_BUCK5CTRL1;
break;
case S5M8767_BUCK6 ... S5M8767_BUCK9:
*reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
break;
default:
return -EINVAL;
}
for (i = 0; i < s5m8767->num_regulators; i++) {
if (s5m8767->opmode[i].id == reg_id) {
mode = s5m8767->opmode[i].mode;
break;
}
}
if (i < s5m8767->num_regulators)
*enable_ctrl =
s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
return 0;
}
static int s5m8767_reg_is_enabled(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, enable_ctrl;
unsigned int val;
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret == -EINVAL)
return 1;
else if (ret)
return ret;
ret = sec_reg_read(s5m8767->iodev, reg, &val);
if (ret)
return ret;
return (val & mask) == enable_ctrl;
}
static int s5m8767_reg_enable(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, enable_ctrl;
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret)
return ret;
return sec_reg_update(s5m8767->iodev, reg, enable_ctrl, mask);
}
static int s5m8767_reg_disable(struct regulator_dev *rdev)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int ret, reg;
int mask = 0xc0, enable_ctrl;
ret = s5m8767_get_register(rdev, &reg, &enable_ctrl);
if (ret)
return ret;
return sec_reg_update(s5m8767->iodev, reg, ~mask, mask);
}
static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
{
int reg;
switch (reg_id) {
case S5M8767_LDO1 ... S5M8767_LDO2:
reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
break;
case S5M8767_LDO3 ... S5M8767_LDO28:
reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
break;
case S5M8767_BUCK1:
reg = S5M8767_REG_BUCK1CTRL2;
break;
case S5M8767_BUCK2:
reg = S5M8767_REG_BUCK2DVS1;
if (s5m8767->buck2_gpiodvs)
reg += s5m8767->buck_gpioindex;
break;
case S5M8767_BUCK3:
reg = S5M8767_REG_BUCK3DVS1;
if (s5m8767->buck3_gpiodvs)
reg += s5m8767->buck_gpioindex;
break;
case S5M8767_BUCK4:
reg = S5M8767_REG_BUCK4DVS1;
if (s5m8767->buck4_gpiodvs)
reg += s5m8767->buck_gpioindex;
break;
case S5M8767_BUCK5:
reg = S5M8767_REG_BUCK5CTRL2;
break;
case S5M8767_BUCK6 ... S5M8767_BUCK9:
reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
break;
default:
return -EINVAL;
}
return reg;
}
static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
int min_vol)
{
int selector = 0;
if (desc == NULL)
return -EINVAL;
if (min_vol > desc->max)
return -EINVAL;
if (min_vol < desc->min)
min_vol = desc->min;
selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
if (desc->min + desc->step * selector > desc->max)
return -EINVAL;
return selector;
}
static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
{
int temp_index = s5m8767->buck_gpioindex;
gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
return 0;
}
static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
{
int temp_index = s5m8767->buck_gpioindex;
gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
return 0;
}
static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
int reg_id = rdev_get_id(rdev);
int old_index, index = 0;
u8 *buck234_vol = NULL;
switch (reg_id) {
case S5M8767_LDO1 ... S5M8767_LDO28:
break;
case S5M8767_BUCK1 ... S5M8767_BUCK6:
if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
buck234_vol = &s5m8767->buck2_vol[0];
else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
buck234_vol = &s5m8767->buck3_vol[0];
else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
buck234_vol = &s5m8767->buck4_vol[0];
break;
case S5M8767_BUCK7 ... S5M8767_BUCK8:
return -EINVAL;
case S5M8767_BUCK9:
break;
default:
return -EINVAL;
}
/* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
if (buck234_vol) {
while (*buck234_vol != selector) {
buck234_vol++;
index++;
}
old_index = s5m8767->buck_gpioindex;
s5m8767->buck_gpioindex = index;
if (index > old_index)
return s5m8767_set_high(s5m8767);
else
return s5m8767_set_low(s5m8767);
} else {
return regulator_set_voltage_sel_regmap(rdev, selector);
}
}
static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_sel,
unsigned int new_sel)
{
struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
const struct sec_voltage_desc *desc;
int reg_id = rdev_get_id(rdev);
desc = reg_voltage_map[reg_id];
if ((old_sel < new_sel) && s5m8767->ramp_delay)
return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
s5m8767->ramp_delay * 1000);
return 0;
}
static struct regulator_ops s5m8767_ops = {
.list_voltage = regulator_list_voltage_linear,
.is_enabled = s5m8767_reg_is_enabled,
.enable = s5m8767_reg_enable,
.disable = s5m8767_reg_disable,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = s5m8767_set_voltage_sel,
.set_voltage_time_sel = s5m8767_set_voltage_time_sel,
};
static struct regulator_ops s5m8767_buck78_ops = {
.is_enabled = s5m8767_reg_is_enabled,
.enable = s5m8767_reg_enable,
.disable = s5m8767_reg_disable,
};
#define s5m8767_regulator_desc(_name) { \
.name = #_name, \
.id = S5M8767_##_name, \
.ops = &s5m8767_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
#define s5m8767_regulator_buck78_desc(_name) { \
.name = #_name, \
.id = S5M8767_##_name, \
.ops = &s5m8767_buck78_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}
static struct regulator_desc regulators[] = {
s5m8767_regulator_desc(LDO1),
s5m8767_regulator_desc(LDO2),
s5m8767_regulator_desc(LDO3),
s5m8767_regulator_desc(LDO4),
s5m8767_regulator_desc(LDO5),
s5m8767_regulator_desc(LDO6),
s5m8767_regulator_desc(LDO7),
s5m8767_regulator_desc(LDO8),
s5m8767_regulator_desc(LDO9),
s5m8767_regulator_desc(LDO10),
s5m8767_regulator_desc(LDO11),
s5m8767_regulator_desc(LDO12),
s5m8767_regulator_desc(LDO13),
s5m8767_regulator_desc(LDO14),
s5m8767_regulator_desc(LDO15),
s5m8767_regulator_desc(LDO16),
s5m8767_regulator_desc(LDO17),
s5m8767_regulator_desc(LDO18),
s5m8767_regulator_desc(LDO19),
s5m8767_regulator_desc(LDO20),
s5m8767_regulator_desc(LDO21),
s5m8767_regulator_desc(LDO22),
s5m8767_regulator_desc(LDO23),
s5m8767_regulator_desc(LDO24),
s5m8767_regulator_desc(LDO25),
s5m8767_regulator_desc(LDO26),
s5m8767_regulator_desc(LDO27),
s5m8767_regulator_desc(LDO28),
s5m8767_regulator_desc(BUCK1),
s5m8767_regulator_desc(BUCK2),
s5m8767_regulator_desc(BUCK3),
s5m8767_regulator_desc(BUCK4),
s5m8767_regulator_desc(BUCK5),
s5m8767_regulator_desc(BUCK6),
s5m8767_regulator_buck78_desc(BUCK7),
s5m8767_regulator_buck78_desc(BUCK8),
s5m8767_regulator_desc(BUCK9),
};
#ifdef CONFIG_OF
static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
struct sec_platform_data *pdata,
struct device_node *pmic_np)
{
int i, gpio;
for (i = 0; i < 3; i++) {
gpio = of_get_named_gpio(pmic_np,
"s5m8767,pmic-buck-dvs-gpios", i);
if (!gpio_is_valid(gpio)) {
dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
return -EINVAL;
}
pdata->buck_gpios[i] = gpio;
}
return 0;
}
static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
struct sec_platform_data *pdata,
struct device_node *pmic_np)
{
int i, gpio;
for (i = 0; i < 3; i++) {
gpio = of_get_named_gpio(pmic_np,
"s5m8767,pmic-buck-ds-gpios", i);
if (!gpio_is_valid(gpio)) {
dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
return -EINVAL;
}
pdata->buck_ds[i] = gpio;
}
return 0;
}
static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
struct sec_platform_data *pdata)
{
struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct device_node *pmic_np, *regulators_np, *reg_np;
struct sec_regulator_data *rdata;
struct sec_opmode_data *rmode;
unsigned int i, dvs_voltage_nr = 1, ret;
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 = of_get_child_count(regulators_np);
rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
rmode = devm_kzalloc(&pdev->dev, sizeof(*rmode) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator mode\n");
return -ENOMEM;
}
pdata->regulators = rdata;
pdata->opmode = rmode;
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(
&pdev->dev, reg_np);
rdata->reg_node = reg_np;
rdata++;
rmode->id = i;
if (of_property_read_u32(reg_np, "op_mode",
&rmode->mode)) {
dev_warn(iodev->dev,
"no op_mode property property at %s\n",
reg_np->full_name);
rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
}
rmode++;
}
if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL))
pdata->buck2_gpiodvs = true;
if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL))
pdata->buck3_gpiodvs = true;
if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL))
pdata->buck4_gpiodvs = true;
if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
pdata->buck4_gpiodvs) {
ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
if (ret)
return -EINVAL;
if (of_property_read_u32(pmic_np,
"s5m8767,pmic-buck-default-dvs-idx",
&pdata->buck_default_idx)) {
pdata->buck_default_idx = 0;
} else {
if (pdata->buck_default_idx >= 8) {
pdata->buck_default_idx = 0;
dev_info(iodev->dev,
"invalid value for default dvs index, use 0\n");
}
}
dvs_voltage_nr = 8;
}
ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
if (ret)
return -EINVAL;
if (of_property_read_u32_array(pmic_np,
"s5m8767,pmic-buck2-dvs-voltage",
pdata->buck2_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck2 voltages not specified\n");
return -EINVAL;
}
if (of_property_read_u32_array(pmic_np,
"s5m8767,pmic-buck3-dvs-voltage",
pdata->buck3_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck3 voltages not specified\n");
return -EINVAL;
}
if (of_property_read_u32_array(pmic_np,
"s5m8767,pmic-buck4-dvs-voltage",
pdata->buck4_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck4 voltages not specified\n");
return -EINVAL;
}
return 0;
}
#else
static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
struct sec_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
static int s5m8767_pmic_probe(struct platform_device *pdev)
{
struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct sec_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
struct regulator_dev **rdev;
struct s5m8767_info *s5m8767;
int i, ret, size, buck_init;
if (!pdata) {
dev_err(pdev->dev.parent, "Platform data not supplied\n");
return -ENODEV;
}
if (iodev->dev->of_node) {
ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
if (ret)
return ret;
}
if (pdata->buck2_gpiodvs) {
if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
return -EINVAL;
}
}
if (pdata->buck3_gpiodvs) {
if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
return -EINVAL;
}
}
if (pdata->buck4_gpiodvs) {
if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
return -EINVAL;
}
}
s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
GFP_KERNEL);
if (!s5m8767)
return -ENOMEM;
size = sizeof(struct regulator_dev *) * (S5M8767_REG_MAX - 2);
s5m8767->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (!s5m8767->rdev)
return -ENOMEM;
rdev = s5m8767->rdev;
s5m8767->dev = &pdev->dev;
s5m8767->iodev = iodev;
s5m8767->num_regulators = pdata->num_regulators;
platform_set_drvdata(pdev, s5m8767);
s5m8767->buck_gpioindex = pdata->buck_default_idx;
s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
s5m8767->buck_ds[0] = pdata->buck_ds[0];
s5m8767->buck_ds[1] = pdata->buck_ds[1];
s5m8767->buck_ds[2] = pdata->buck_ds[2];
s5m8767->ramp_delay = pdata->buck_ramp_delay;
s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
s5m8767->opmode = pdata->opmode;
buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
pdata->buck2_init);
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS2, buck_init);
buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
pdata->buck3_init);
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS2, buck_init);
buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
pdata->buck4_init);
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS2, buck_init);
for (i = 0; i < 8; i++) {
if (s5m8767->buck2_gpiodvs) {
s5m8767->buck2_vol[i] =
s5m8767_convert_voltage_to_sel(
&buck_voltage_val2,
pdata->buck2_voltage[i]);
}
if (s5m8767->buck3_gpiodvs) {
s5m8767->buck3_vol[i] =
s5m8767_convert_voltage_to_sel(
&buck_voltage_val2,
pdata->buck3_voltage[i]);
}
if (s5m8767->buck4_gpiodvs) {
s5m8767->buck4_vol[i] =
s5m8767_convert_voltage_to_sel(
&buck_voltage_val2,
pdata->buck4_voltage[i]);
}
}
if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
pdata->buck4_gpiodvs) {
if (!gpio_is_valid(pdata->buck_gpios[0]) ||
!gpio_is_valid(pdata->buck_gpios[1]) ||
!gpio_is_valid(pdata->buck_gpios[2])) {
dev_err(&pdev->dev, "GPIO NOT VALID\n");
return -EINVAL;
}
ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
"S5M8767 SET1");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
"S5M8767 SET2");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
"S5M8767 SET3");
if (ret)
return ret;
/* SET1 GPIO */
gpio_direction_output(pdata->buck_gpios[0],
(s5m8767->buck_gpioindex >> 2) & 0x1);
/* SET2 GPIO */
gpio_direction_output(pdata->buck_gpios[1],
(s5m8767->buck_gpioindex >> 1) & 0x1);
/* SET3 GPIO */
gpio_direction_output(pdata->buck_gpios[2],
(s5m8767->buck_gpioindex >> 0) & 0x1);
}
ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
if (ret)
return ret;
/* DS2 GPIO */
gpio_direction_output(pdata->buck_ds[0], 0x0);
/* DS3 GPIO */
gpio_direction_output(pdata->buck_ds[1], 0x0);
/* DS4 GPIO */
gpio_direction_output(pdata->buck_ds[2], 0x0);
if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
pdata->buck4_gpiodvs) {
sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK2CTRL,
(pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1),
1 << 1);
sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK3CTRL,
(pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1),
1 << 1);
sec_reg_update(s5m8767->iodev, S5M8767_REG_BUCK4CTRL,
(pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1),
1 << 1);
}
/* Initialize GPIO DVS registers */
for (i = 0; i < 8; i++) {
if (s5m8767->buck2_gpiodvs) {
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK2DVS1 + i,
s5m8767->buck2_vol[i]);
}
if (s5m8767->buck3_gpiodvs) {
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK3DVS1 + i,
s5m8767->buck3_vol[i]);
}
if (s5m8767->buck4_gpiodvs) {
sec_reg_write(s5m8767->iodev, S5M8767_REG_BUCK4DVS1 + i,
s5m8767->buck4_vol[i]);
}
}
if (s5m8767->buck2_ramp)
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x08, 0x08);
if (s5m8767->buck3_ramp)
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x04, 0x04);
if (s5m8767->buck4_ramp)
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP, 0x02, 0x02);
if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
|| s5m8767->buck4_ramp) {
switch (s5m8767->ramp_delay) {
case 5:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0x40, 0xf0);
break;
case 10:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0x90, 0xf0);
break;
case 25:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0xd0, 0xf0);
break;
case 50:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0xe0, 0xf0);
break;
case 100:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0xf0, 0xf0);
break;
default:
sec_reg_update(s5m8767->iodev, S5M8767_REG_DVSRAMP,
0x90, 0xf0);
}
}
for (i = 0; i < pdata->num_regulators; i++) {
const struct sec_voltage_desc *desc;
int id = pdata->regulators[i].id;
desc = reg_voltage_map[id];
if (desc) {
regulators[id].n_voltages =
(desc->max - desc->min) / desc->step + 1;
regulators[id].min_uV = desc->min;
regulators[id].uV_step = desc->step;
regulators[id].vsel_reg =
s5m8767_get_vsel_reg(id, s5m8767);
if (id < S5M8767_BUCK1)
regulators[id].vsel_mask = 0x3f;
else
regulators[id].vsel_mask = 0xff;
}
config.dev = s5m8767->dev;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = s5m8767;
config.regmap = iodev->regmap;
config.of_node = pdata->regulators[i].reg_node;
rdev[i] = regulator_register(&regulators[id], &config);
if (IS_ERR(rdev[i])) {
ret = PTR_ERR(rdev[i]);
dev_err(s5m8767->dev, "regulator init failed for %d\n",
id);
rdev[i] = NULL;
goto err;
}
}
return 0;
err:
for (i = 0; i < s5m8767->num_regulators; i++)
if (rdev[i])
regulator_unregister(rdev[i]);
return ret;
}
static int s5m8767_pmic_remove(struct platform_device *pdev)
{
struct s5m8767_info *s5m8767 = platform_get_drvdata(pdev);
struct regulator_dev **rdev = s5m8767->rdev;
int i;
for (i = 0; i < s5m8767->num_regulators; i++)
if (rdev[i])
regulator_unregister(rdev[i]);
return 0;
}
static const struct platform_device_id s5m8767_pmic_id[] = {
{ "s5m8767-pmic", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
static struct platform_driver s5m8767_pmic_driver = {
.driver = {
.name = "s5m8767-pmic",
.owner = THIS_MODULE,
},
.probe = s5m8767_pmic_probe,
.remove = s5m8767_pmic_remove,
.id_table = s5m8767_pmic_id,
};
static int __init s5m8767_pmic_init(void)
{
return platform_driver_register(&s5m8767_pmic_driver);
}
subsys_initcall(s5m8767_pmic_init);
static void __exit s5m8767_pmic_exit(void)
{
platform_driver_unregister(&s5m8767_pmic_driver);
}
module_exit(s5m8767_pmic_exit);
/* Module information */
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
MODULE_LICENSE("GPL");
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