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kernel_samsung_a53x/drivers/regulator/s2mpu14_regulator.c

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Import A536BXXU9EXDC
2024-06-15 21:02:09 +02:00
/*
* s2mpu14.c
*
* Copyright (c) 2021 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 <../drivers/pinctrl/samsung/pinctrl-samsung.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/s2mpu14.h>
#include <linux/mfd/samsung/s2mpu14-regulator.h>
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/regulator/pmic_class.h>
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
#include <soc/samsung/acpm_mfd.h>
#define SUB_CHANNEL 1
static struct device_node *acpm_mfd_node;
#endif
#define I2C_BASE_COMMON 0x00
#define I2C_BASE_PM 0x01
#define I2C_BASE_ADC 0x0A
#define I2C_BASE_GPIO 0x0B
#define I2C_BASE_CLOSE 0x0F
static struct s2mpu14_info *s2mpu14_static_info;
struct s2mpu14_info {
bool g3d_en;
int wtsr_en;
int num_regulators;
unsigned int opmode[S2MPU14_REG_MAX];
struct regulator_dev *rdev[S2MPU14_REG_MAX];
struct s2mpu14_dev *iodev;
struct mutex lock;
struct i2c_client *i2c;
struct i2c_client *gpio_i2c;
#if IS_ENABLED(CONFIG_DRV_SAMSUNG_PMIC)
u8 base_addr;
u8 read_addr;
u8 read_val;
struct device *dev;
#endif
};
static unsigned int s2mpu14_of_map_mode(unsigned int val)
{
switch (val) {
case SEC_OPMODE_SUSPEND: /* ON in Standby Mode */
return 0x1;
case SEC_OPMODE_MIF: /* ON in PWREN_MIF mode */
return 0x2;
case SEC_OPMODE_ON: /* ON in Normal Mode */
return 0x3;
default:
return REGULATOR_MODE_INVALID;
}
}
int s2mpu14_write_gpio(unsigned char reg, unsigned char value)
{
int ret = 0;
if (reg < S2MPU14_GPIO_SET1 && reg > S2MPU14_GPIO_SET8) {
pr_err("%s: fault reg.\n", __func__);
return -1;
}
ret = s2mpu14_write_reg(s2mpu14_static_info->gpio_i2c, reg, value);
if (ret < 0) {
pr_err("%s: s2mpu14_write_reg fail\n", __func__);
return -1;
}
return 0;
}
EXPORT_SYMBOL_GPL(s2mpu14_write_gpio);
int s2mpu14_read_gpio(unsigned char reg, unsigned char *dest)
{
int ret = 0;
if (reg < S2MPU14_GPIO_SET1 && reg > S2MPU14_GPIO_SET8) {
pr_err("%s: fault reg.\n", __func__);
return -1;
}
ret = s2mpu14_read_reg(s2mpu14_static_info->gpio_i2c, reg, dest);
if (ret < 0) {
pr_err("%s: s2mpu14_read_reg fail\n", __func__);
return -1;
}
return 0;
}
EXPORT_SYMBOL_GPL(s2mpu14_read_gpio);
/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
static int s2m_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
unsigned int val;
int id = rdev_get_id(rdev);
val = mode << S2MPU14_ENABLE_SHIFT;
s2mpu14->opmode[id] = val;
return 0;
}
static int s2m_enable(struct regulator_dev *rdev)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
return s2mpu14_update_reg(s2mpu14->i2c, rdev->desc->enable_reg,
s2mpu14->opmode[rdev_get_id(rdev)],
rdev->desc->enable_mask);
}
static int s2m_disable_regmap(struct regulator_dev *rdev)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
unsigned int val;
if (rdev->desc->enable_is_inverted)
val = rdev->desc->enable_mask;
else
val = 0;
return s2mpu14_update_reg(s2mpu14->i2c, rdev->desc->enable_reg,
val, rdev->desc->enable_mask);
}
static int s2m_is_enabled_regmap(struct regulator_dev *rdev)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
int ret;
u8 val;
ret = s2mpu14_read_reg(s2mpu14->i2c,
rdev->desc->enable_reg, &val);
if (ret)
return ret;
if (rdev->desc->enable_is_inverted)
return (val & rdev->desc->enable_mask) == 0;
else
return (val & rdev->desc->enable_mask) != 0;
}
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 s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
int ramp_shift, reg_id = rdev_get_id(rdev);
unsigned int ramp_value = 0;
u8 ramp_addr = 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);
}
ramp_value = 0x00; // 6.25mv/us fixed
switch (reg_id) {
case S2MPU14_BUCK1:
case S2MPU14_BUCK5:
ramp_shift = 0;
break;
case S2MPU14_BUCK2:
case S2MPU14_BUCK6:
ramp_shift = 2;
break;
case S2MPU14_BUCK3:
case S2MPU14_BUCK7:
ramp_shift = 4;
break;
case S2MPU14_BUCK4:
case S2MPU14_BUCK8:
ramp_shift = 6;
break;
default:
return -EINVAL;
}
switch (reg_id) {
case S2MPU14_BUCK1:
case S2MPU14_BUCK2:
case S2MPU14_BUCK3:
case S2MPU14_BUCK4:
ramp_addr = S2MPU14_REG_BUCK_RAMP_UP1S;
break;
case S2MPU14_BUCK5:
case S2MPU14_BUCK6:
case S2MPU14_BUCK7:
case S2MPU14_BUCK8:
ramp_addr = S2MPU14_REG_BUCK_RAMP_UP2S;
break;
default:
return -EINVAL;
}
return s2mpu14_update_reg(s2mpu14->i2c, ramp_addr,
ramp_value << ramp_shift,
BUCK_RAMP_MASK << ramp_shift);
}
static int s2m_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
int ret;
u8 val;
ret = s2mpu14_read_reg(s2mpu14->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 s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
int ret;
ret = s2mpu14_update_reg(s2mpu14->i2c, rdev->desc->vsel_reg,
sel, rdev->desc->vsel_mask);
if (ret < 0) {
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
return ret;
}
if (rdev->desc->apply_bit)
ret = s2mpu14_update_reg(s2mpu14->i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
return ret;
}
static int s2m_set_voltage_sel_regmap_buck(struct regulator_dev *rdev,
unsigned sel)
{
struct s2mpu14_info *s2mpu14 = rdev_get_drvdata(rdev);
int ret = 0;
ret = s2mpu14_write_reg(s2mpu14->i2c, rdev->desc->vsel_reg, sel);
if (ret < 0) {
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
return -EINVAL;
}
if (rdev->desc->apply_bit)
ret = s2mpu14_update_reg(s2mpu14->i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
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);
else
return DIV_ROUND_UP(old_volt - new_volt, ramp_delay);
return 0;
}
static struct regulator_ops s2mpu14_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 s2mpu14_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,
};
static struct regulator_ops s2mpu14_bb_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,
};
#define _BUCK(macro) S2MPU14_BUCK##macro
#define _buck_ops(num) s2mpu14_buck_ops##num
#define _LDO(macro) S2MPU14_LDO##macro
#define _ldo_ops(num) s2mpu14_ldo_ops##num
#define _BB(macro) S2MPU14_BB##macro
#define _bb_ops(num) s2mpu14_bb_ops##num
#define _REG(ctrl) S2MPU14_REG##ctrl
#define _TIME(macro) S2MPU14_ENABLE_TIME##macro
#define _LDO_MIN(group) S2MPU14_LDO_MIN##group
#define _LDO_STEP(group) S2MPU14_LDO_STEP##group
#define _BUCK_MIN(group) S2MPU14_BUCK_MIN##group
#define _BUCK_STEP(group) S2MPU14_BUCK_STEP##group
#define _BB_MIN(group) S2MPU14_BB_MIN##group
#define _BB_STEP(group) S2MPU14_BB_STEP##group
#define BUCK_DESC(_name, _id, _ops, g, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = _BUCK_MIN(g), \
.uV_step = _BUCK_STEP(g), \
.n_voltages = S2MPU14_BUCK_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPU14_BUCK_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPU14_ENABLE_MASK, \
.enable_time = t, \
.of_map_mode = s2mpu14_of_map_mode \
}
#define LDO_DESC(_name, _id, _ops, g, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = _LDO_MIN(g), \
.uV_step = _LDO_STEP(g), \
.n_voltages = S2MPU14_LDO_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPU14_LDO_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPU14_ENABLE_MASK, \
.enable_time = t, \
.of_map_mode = s2mpu14_of_map_mode \
}
#define BB_DESC(_name, _id, _ops, g, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = _BB_MIN(g), \
.uV_step = _BB_STEP(g), \
.n_voltages = S2MPU14_BB_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPU14_BB_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPU14_ENABLE_MASK, \
.enable_time = t, \
.of_map_mode = s2mpu14_of_map_mode \
}
static struct regulator_desc regulators[S2MPU14_REG_MAX] = {
/* name, id, ops, group, vsel_reg, enable_reg, ramp_delay */
/* LDO 1~28 */
LDO_DESC("LDO1", _LDO(1), &_ldo_ops(), 1, _REG(_LDO1S_CTRL), _REG(_LDO1S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO2", _LDO(2), &_ldo_ops(), 1, _REG(_LDO2S_CTRL), _REG(_LDO2S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO3", _LDO(3), &_ldo_ops(), 1, _REG(_LDO3S_CTRL), _REG(_LDO3S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO4", _LDO(4), &_ldo_ops(), 1, _REG(_LDO4S_CTRL), _REG(_LDO4S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO5", _LDO(5), &_ldo_ops(), 1, _REG(_LDO5S_CTRL), _REG(_LDO5S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO6", _LDO(6), &_ldo_ops(), 2, _REG(_LDO6S_CTRL), _REG(_LDO6S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO7", _LDO(7), &_ldo_ops(), 2, _REG(_LDO7S_CTRL), _REG(_LDO7S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO8", _LDO(8), &_ldo_ops(), 3, _REG(_LDO8S_CTRL), _REG(_LDO8S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO9", _LDO(9), &_ldo_ops(), 2, _REG(_LDO9S_CTRL), _REG(_LDO9S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO10", _LDO(10), &_ldo_ops(), 3, _REG(_LDO10S_CTRL), _REG(_LDO10S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO11", _LDO(11), &_ldo_ops(), 3, _REG(_LDO11S_CTRL), _REG(_LDO11S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO12", _LDO(12), &_ldo_ops(), 3, _REG(_LDO12S_CTRL), _REG(_LDO12S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO13", _LDO(13), &_ldo_ops(), 2, _REG(_LDO13S_CTRL), _REG(_LDO13S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO14", _LDO(14), &_ldo_ops(), 2, _REG(_LDO14S_CTRL), _REG(_LDO14S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO15", _LDO(15), &_ldo_ops(), 2, _REG(_LDO15S_CTRL), _REG(_LDO15S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO16", _LDO(16), &_ldo_ops(), 3, _REG(_LDO16S_CTRL), _REG(_LDO16S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO17", _LDO(17), &_ldo_ops(), 2, _REG(_LDO17S_CTRL), _REG(_LDO17S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO18", _LDO(18), &_ldo_ops(), 2, _REG(_LDO18S_CTRL), _REG(_LDO18S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO19", _LDO(19), &_ldo_ops(), 2, _REG(_LDO19S_CTRL), _REG(_LDO19S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO20", _LDO(20), &_ldo_ops(), 3, _REG(_LDO20S_CTRL), _REG(_LDO20S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO21", _LDO(21), &_ldo_ops(), 3, _REG(_LDO21S_CTRL), _REG(_LDO21S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO22", _LDO(22), &_ldo_ops(), 2, _REG(_LDO22S_CTRL), _REG(_LDO22S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO23", _LDO(23), &_ldo_ops(), 2, _REG(_LDO23S_CTRL), _REG(_LDO23S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO24", _LDO(24), &_ldo_ops(), 3, _REG(_LDO24S_CTRL), _REG(_LDO24S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO25", _LDO(25), &_ldo_ops(), 3, _REG(_LDO25S_CTRL), _REG(_LDO25S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO26", _LDO(26), &_ldo_ops(), 3, _REG(_LDO26S_CTRL), _REG(_LDO26S_CTRL), _TIME(_LDO)),
LDO_DESC("LDO27", _LDO(27), &_ldo_ops(), 3, _REG(_LDO27S_CTRL), _REG(_LDO27S_CTRL), _TIME(_LDO)),
//LDO_DESC("LDO28", _LDO(28), &_ldo_ops(), 2, _REG(_LDO28S_CTRL), _REG(_LDO28S_CTRL), _TIME(_LDO)),
/* BUCK 1~8, BB */
BUCK_DESC("BUCK1", _BUCK(1), &_buck_ops(), 1, _REG(_BUCK1S_OUT2), _REG(_BUCK1S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK2", _BUCK(2), &_buck_ops(), 1, _REG(_BUCK2S_OUT2), _REG(_BUCK2S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK3", _BUCK(3), &_buck_ops(), 1, _REG(_BUCK3S_OUT2), _REG(_BUCK3S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK4", _BUCK(4), &_buck_ops(), 1, _REG(_BUCK4S_OUT2), _REG(_BUCK4S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK5", _BUCK(5), &_buck_ops(), 1, _REG(_BUCK5S_OUT2), _REG(_BUCK5S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK6", _BUCK(6), &_buck_ops(), 1, _REG(_BUCK6S_OUT1), _REG(_BUCK6S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK7", _BUCK(7), &_buck_ops(), 2, _REG(_BUCK7S_OUT1), _REG(_BUCK7S_CTRL), _TIME(_BUCK)),
BUCK_DESC("BUCK8", _BUCK(8), &_buck_ops(), 2, _REG(_BUCK8S_OUT1), _REG(_BUCK8S_CTRL), _TIME(_BUCK)),
BB_DESC("BUCKB", _BB(), &_bb_ops(), 1, _REG(_BB_OUT1), _REG(_BB_CTRL), _TIME(_BB))
};
#if IS_ENABLED(CONFIG_OF)
static int s2mpu14_pmic_dt_parse_pdata(struct s2mpu14_dev *iodev,
struct s2mpu14_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np, *reg_np;
struct s2mpu14_regulator_data *rdata;
u32 i;
int ret, len;
u32 val;
const u32 *p;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
dev_err(iodev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
acpm_mfd_node = pmic_np;
#endif
/* wtsr_en */
pdata->wtsr_en = 0;
ret = of_property_read_u32(pmic_np, "wtsr_en", &val);
if (ret < 0)
pr_info("%s: fail to read wtsr_en\n", __func__);
pdata->wtsr_en = val;
/* Set sel_vgpio (control_sel) */
p = of_get_property(pmic_np, "sel_vgpio", &len);
if (!p) {
pr_info("%s : (ERROR) sel_vgpio isn't parsing\n", __func__);
return -EINVAL;
}
len = len / sizeof(u32);
if (len != S2MPU14_SEL_VGPIO_NUM) {
pr_info("%s : (ERROR) sel_vgpio num isn't not equal\n", __func__);
return -EINVAL;
}
pdata->sel_vgpio = devm_kzalloc(iodev->dev, sizeof(u32) * len, GFP_KERNEL);
if (!(pdata->sel_vgpio)) {
dev_err(iodev->dev,
"(ERROR) could not allocate memory for sel_vgpio data\n");
return -ENOMEM;
}
for (i = 0; i < len; i++) {
ret = of_property_read_u32_index(pmic_np, "sel_vgpio", i, &pdata->sel_vgpio[i]);
if (ret) {
pr_info("%s : (ERROR) sel_vgpio%d is empty\n", __func__, i + 1);
pdata->sel_vgpio[i] = 0x1FF;
}
}
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)
return -ENOMEM;
pdata->regulators = rdata;
pdata->num_rdata = 0;
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,
&regulators[i]);
rdata->reg_node = reg_np;
rdata++;
pdata->num_rdata++;
}
return 0;
}
#else
static int s2mpu14_pmic_dt_parse_pdata(struct s2mpu14_pmic_dev *iodev,
struct s2mpu14_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
#if IS_ENABLED(CONFIG_EXYNOS_AFM)
int sub_pmic_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
if (!i2c)
return -ENODEV;
return s2mpu14_update_reg(i2c, reg, val, mask);
}
EXPORT_SYMBOL_GPL(sub_pmic_update_reg);
int sub_pmic_get_i2c(struct i2c_client **i2c)
{
if (!s2mpu14_static_info)
return -ENODEV;
*i2c = s2mpu14_static_info->i2c;
return 0;
}
EXPORT_SYMBOL_GPL(sub_pmic_get_i2c);
#endif
struct s2mpu14_oi_data {
u8 reg;
u8 val;
};
#define DECLARE_OI(_reg, _val) { .reg = (_reg), .val = (_val) }
static const struct s2mpu14_oi_data s2mpu14_oi[] = {
/* BUCK 1~8 & BUCK-BOOST & LDO(6, 10, 11, 23) OI function enable */
DECLARE_OI(S2MPU14_REG_BUCK_OI_EN1S, 0xFF),
DECLARE_OI(S2MPU14_REG_BUCK_OI_EN2S, 0x01),
DECLARE_OI(S2MPU14_REG_LDO_OI_EN_S, 0x0F),
/* BUCK 1~8 & BUCK-BOOST & LDO(6, 10, 11, 23) OI function power down disable */
DECLARE_OI(S2MPU14_REG_BUCK_OI_PD_EN1S, 0x00),
DECLARE_OI(S2MPU14_REG_BUCK_OI_PD_EN2S, 0x00),
DECLARE_OI(S2MPU14_REG_LDO_OI_PD_EN_S, 0x00),
/* OI detection time window : 300us, OI comp. output count : 50 times */
DECLARE_OI(S2MPU14_REG_BUCK_OI_CTRL1S, 0xCC),
DECLARE_OI(S2MPU14_REG_BUCK_OI_CTRL2S, 0xCC),
DECLARE_OI(S2MPU14_REG_BUCK_OI_CTRL3S, 0xCC),
DECLARE_OI(S2MPU14_REG_BUCK_OI_CTRL4S, 0xCC),
DECLARE_OI(S2MPU14_REG_BUCK_OI_CTRL5S, 0x0C),
DECLARE_OI(S2MPU14_REG_LDO_OI_CTRL_S, 0xFF),
};
static int s2mpu14_oi_function(struct s2mpu14_dev *iodev)
{
struct i2c_client *i2c = iodev->pmic;
u32 i;
u8 val;
int ret, cnt = 0;
char buf[1024] = {0, };
for (i = 0; i < ARRAY_SIZE(s2mpu14_oi); i++) {
ret = s2mpu14_write_reg(i2c, s2mpu14_oi[i].reg, s2mpu14_oi[i].val);
if (ret) {
pr_err("%s: failed to write register\n", __func__);
goto err;
}
}
for (i = 0; i < ARRAY_SIZE(s2mpu14_oi); i++) {
ret = s2mpu14_read_reg(i2c, s2mpu14_oi[i].reg, &val);
if (ret)
goto err;
cnt += snprintf(buf + cnt, sizeof(buf) - 1, "0x%x[0x%02hhx], ", s2mpu14_oi[i].reg, val);
}
pr_info("%s: %s\n", __func__, buf);
return 0;
err:
return -1;
}
static void s2mpu14_wtsr_enable(struct s2mpu14_info *s2mpu14,
struct s2mpu14_platform_data *pdata)
{
int ret;
pr_info("[PMIC] %s: WTSR (%s)\n", __func__,
pdata->wtsr_en ? "enable" : "disable");
ret = s2mpu14_update_reg(s2mpu14->i2c, S2MPU14_REG_CFG1,
S2MPU14_WTSR_EN_MASK, S2MPU14_WTSR_EN_MASK);
if (ret < 0)
pr_info("%s: fail to update WTSR reg(%d)\n", __func__, ret);
s2mpu14->wtsr_en = pdata->wtsr_en;
}
static void s2mpu14_wtsr_disable(struct s2mpu14_info *s2mpu14)
{
int ret;
pr_info("[PMIC] %s: disable WTSR\n", __func__);
ret = s2mpu14_update_reg(s2mpu14->i2c, S2MPU14_REG_CFG1,
0x00, S2MPU14_WTSR_EN_MASK);
if (ret < 0)
pr_info("%s: fail to update WTSR reg(%d)\n", __func__, ret);
}
#if IS_ENABLED(CONFIG_DRV_SAMSUNG_PMIC)
static ssize_t s2mpu14_read_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
struct s2mpu14_info *s2mpu14 = dev_get_drvdata(dev);
int ret;
u8 base_addr = 0, reg_addr = 0, val = 0;
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
struct s2mpu14_dev *iodev = s2mpu14->iodev;
#endif
if (buf == NULL) {
pr_info("%s: empty buffer\n", __func__);
return -1;
}
ret = sscanf(buf, "0x%02hhx%02hhx", &base_addr, &reg_addr);
if (ret != 2) {
pr_err("%s: input error\n", __func__);
return size;
}
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
mutex_lock(&iodev->i2c_lock);
ret = exynos_acpm_read_reg(acpm_mfd_node, SUB_CHANNEL, base_addr, reg_addr, &val);
mutex_unlock(&iodev->i2c_lock);
if (ret)
pr_info("%s: fail to read i2c addr/data\n", __func__);
#endif
pr_info("%s: reg(0x%02hhx%02hhx) data(0x%02hhx)\n", __func__,
base_addr, reg_addr, val);
s2mpu14->base_addr = base_addr;
s2mpu14->read_addr = reg_addr;
s2mpu14->read_val = val;
return size;
}
static ssize_t s2mpu14_read_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct s2mpu14_info *s2mpu14 = dev_get_drvdata(dev);
return sprintf(buf, "0x%02hhx%02hhx: 0x%02hhx\n",
s2mpu14->base_addr, s2mpu14->read_addr, s2mpu14->read_val);
}
static ssize_t s2mpu14_write_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int ret;
u8 base_addr = 0, reg_addr = 0, data = 0;
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
struct s2mpu14_info *s2mpu14 = dev_get_drvdata(dev);
struct s2mpu14_dev *iodev = s2mpu14->iodev;
#endif
if (buf == NULL) {
pr_info("%s: empty buffer\n", __func__);
return size;
}
ret = sscanf(buf, "0x%02hhx%02hhx 0x%02hhx", &base_addr, &reg_addr, &data);
if (ret != 3) {
pr_err("%s: input error\n", __func__);
return size;
}
switch (base_addr) {
case I2C_BASE_COMMON:
case I2C_BASE_PM:
case I2C_BASE_ADC:
case I2C_BASE_GPIO:
case I2C_BASE_CLOSE:
break;
default:
pr_err("%s: base address error(0x%02hhx)\n", __func__, base_addr);
return size;
}
pr_info("%s: reg(0x%02hhx%02hhx) data(0x%02hhx)\n", __func__,
base_addr, reg_addr, data);
#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
mutex_lock(&iodev->i2c_lock);
ret = exynos_acpm_write_reg(acpm_mfd_node, SUB_CHANNEL, base_addr, reg_addr, data);
mutex_unlock(&iodev->i2c_lock);
if (ret)
pr_info("%s: fail to write i2c addr/data\n", __func__);
#endif
return size;
}
static ssize_t s2mpu14_write_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "echo (register addr.) (data) > s2mpu14_write\n");
}
static struct pmic_device_attribute regulator_attr[] = {
PMIC_ATTR(s2mpu14_write, 0644, s2mpu14_write_show, s2mpu14_write_store),
PMIC_ATTR(s2mpu14_read, 0644, s2mpu14_read_show, s2mpu14_read_store),
};
static int s2mpu14_create_sysfs(struct s2mpu14_info *s2mpu14)
{
struct device *s2mpu14_pmic = s2mpu14->dev;
struct device *dev = s2mpu14->iodev->dev;
char device_name[32] = {0,};
int err = -ENODEV, i = 0;
pr_info("%s()\n", __func__);
s2mpu14->base_addr = 0;
s2mpu14->read_addr = 0;
s2mpu14->read_val = 0;
/* Dynamic allocation for device name */
snprintf(device_name, sizeof(device_name) - 1, "%s@%s",
dev_driver_string(dev), dev_name(dev));
s2mpu14_pmic = pmic_device_create(s2mpu14, device_name);
s2mpu14->dev = s2mpu14_pmic;
/* Create sysfs entries */
for (i = 0; i < ARRAY_SIZE(regulator_attr); i++) {
err = device_create_file(s2mpu14_pmic, &regulator_attr[i].dev_attr);
if (err)
goto remove_pmic_device;
}
return 0;
remove_pmic_device:
for (i--; i >= 0; i--)
device_remove_file(s2mpu14_pmic, &regulator_attr[i].dev_attr);
pmic_device_destroy(s2mpu14_pmic->devt);
return -1;
}
#endif
static int s2mpu14_set_sel_vgpio(struct s2mpu14_info *s2mpu14,
struct s2mpu14_platform_data *pdata)
{
int ret, i, cnt = 0;
u8 reg, val;
char buf[1024] = {0, };
for (i = 0; i < S2MPU14_SEL_VGPIO_NUM; i++) {
reg = S2MPU14_REG_SEL_VGPIO0S + i;
val = pdata->sel_vgpio[i];
if (val <= S2MPU14_SEL_VGPIO_MAX_VAL) {
ret = s2mpu14_write_reg(s2mpu14->i2c, reg, val);
if (ret) {
pr_err("%s: sel_vgpio%d write error\n", __func__, i + 1);
goto err;
}
cnt += snprintf(buf + cnt, sizeof(buf) - 1,
"0x%02hhx[0x%02hhx], ", reg, val);
} else {
pr_err("%s : sel_vgpio%d exceed the value\n", __func__, i + 1);
goto err;
}
}
pr_info("%s: %s\n", __func__, buf);
return 0;
err:
return -1;
}
static void s2mpu14_set_regulator_vol(struct s2mpu14_info *s2mpu14)
{
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK1S_OUT1, 0x20);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK2S_OUT1, 0x20);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK3S_OUT1, 0x20);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK4S_OUT1, 0x20);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK5S_OUT1, 0x20);
/* Set dropout voltage for B7S and B8S */
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_SEL_DVS_EN0S, 0x00);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK7S_OUT2, 0x79);
// s2mpu14_write_reg(s2mpu14->i2c, S2MPU14_REG_BUCK8S_OUT2, 0x9E);
}
static int s2mpu14_pmic_probe(struct platform_device *pdev)
{
struct s2mpu14_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct s2mpu14_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
struct s2mpu14_info *s2mpu14;
int ret;
u32 i;
pr_info("[PMIC] %s: start\n", __func__);
if (iodev->dev->of_node) {
ret = s2mpu14_pmic_dt_parse_pdata(iodev, pdata);
if (ret)
goto err_pdata;
}
if (!pdata) {
dev_err(pdev->dev.parent, "Platform data not supplied\n");
return -ENODEV;
}
s2mpu14 = devm_kzalloc(&pdev->dev, sizeof(struct s2mpu14_info),
GFP_KERNEL);
if (!s2mpu14)
return -ENOMEM;
s2mpu14->iodev = iodev;
s2mpu14->i2c = iodev->pmic;
s2mpu14->gpio_i2c = iodev->gpio_i2c;
mutex_init(&s2mpu14->lock);
s2mpu14->g3d_en = pdata->g3d_en;
s2mpu14_static_info = s2mpu14;
platform_set_drvdata(pdev, s2mpu14);
for (i = 0; i < pdata->num_rdata; i++) {
int id = pdata->regulators[i].id;
config.dev = &pdev->dev;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = s2mpu14;
config.of_node = pdata->regulators[i].reg_node;
s2mpu14->opmode[id] = regulators[id].enable_mask;
s2mpu14->rdev[i] = devm_regulator_register(&pdev->dev,
&regulators[id], &config);
if (IS_ERR(s2mpu14->rdev[i])) {
ret = PTR_ERR(s2mpu14->rdev[i]);
dev_err(&pdev->dev, "regulator init failed for %d\n", i);
s2mpu14->rdev[i] = NULL;
goto err_s2mpu14_data;
}
}
s2mpu14->num_regulators = pdata->num_rdata;
if (pdata->wtsr_en)
s2mpu14_wtsr_enable(s2mpu14, pdata);
ret = s2mpu14_set_sel_vgpio(s2mpu14, pdata);
if (ret < 0) {
pr_err("%s: s2mpu14_set_sel_vgpio fail\n", __func__);
goto err_s2mpu14_data;
}
ret = s2mpu14_oi_function(iodev);
if (ret < 0)
pr_err("%s: s2mpu14_oi_function fail\n", __func__);
#if IS_ENABLED(CONFIG_DRV_SAMSUNG_PMIC)
ret = s2mpu14_create_sysfs(s2mpu14);
if (ret < 0) {
pr_err("%s: s2mpu14_create_sysfs fail\n", __func__);
goto err_s2mpu14_data;
}
#endif
s2mpu14_set_regulator_vol(s2mpu14);
pr_info("[PMIC] %s: end\n", __func__);
return 0;
err_s2mpu14_data:
mutex_destroy(&s2mpu14->lock);
err_pdata:
return ret;
}
static int s2mpu14_pmic_remove(struct platform_device *pdev)
{
struct s2mpu14_info *s2mpu14 = platform_get_drvdata(pdev);
#if IS_ENABLED(CONFIG_DRV_SAMSUNG_PMIC)
struct device *s2mpu14_pmic = s2mpu14->dev;
int i = 0;
/* Remove sysfs entries */
for (i = 0; i < ARRAY_SIZE(regulator_attr); i++)
device_remove_file(s2mpu14_pmic, &regulator_attr[i].dev_attr);
pmic_device_destroy(s2mpu14_pmic->devt);
#endif
mutex_destroy(&s2mpu14->lock);
return 0;
}
static void s2mpu14_pmic_shutdown(struct platform_device *pdev)
{
struct s2mpu14_info *s2mpu14 = platform_get_drvdata(pdev);
/* disable WTSR */
if (s2mpu14->wtsr_en)
s2mpu14_wtsr_disable(s2mpu14);
}
#if IS_ENABLED(CONFIG_PM)
static int s2mpu14_pmic_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s2mpu14_info *s2mpu14 = platform_get_drvdata(pdev);
int ret = 0;
pr_info("%s\n", __func__);
/* Off time reduction */
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB0, 0x00);
if (ret)
pr_err("%s: Failed to reduce off time(0xB0)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB1, 0x00);
if (ret)
pr_err("%s: Failed to reduce off time(0xB1)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB2, 0x00);
if (ret)
pr_err("%s: Failed to reduce off time(0xB2)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB3, 0x00);
if (ret)
pr_err("%s: Failed to reduce off time(0xB3)\n", __func__);
return 0;
}
static int s2mpu14_pmic_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct s2mpu14_info *s2mpu14 = platform_get_drvdata(pdev);
int ret = 0;
pr_info("%s\n", __func__);
/* Restore off time reduction */
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB0, 0x11);
if (ret)
pr_err("%s: Failed to reduce off time(0xB0)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB1, 0x13);
if (ret)
pr_err("%s: Failed to reduce off time(0xB1)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB2, 0x11);
if (ret)
pr_err("%s: Failed to reduce off time(0xB2)\n", __func__);
ret = s2mpu14_write_reg(s2mpu14->i2c, 0xB3, 0x10);
if (ret)
pr_err("%s: Failed to reduce off time(0xB3)\n", __func__);
return 0;
}
#else
#define s2mpu14_pmic_suspend NULL
#define s2mpu14_pmic_resume NULL
#endif /* CONFIG_PM */
const struct dev_pm_ops s2mpu14_pmic_pm = {
.suspend = s2mpu14_pmic_suspend,
.resume = s2mpu14_pmic_resume,
};
static const struct platform_device_id s2mpu14_pmic_id[] = {
{ "s2mpu14-regulator", 0},
{ },
};
MODULE_DEVICE_TABLE(platform, s2mpu14_pmic_id);
static struct platform_driver s2mpu14_pmic_driver = {
.driver = {
.name = "s2mpu14-regulator",
.owner = THIS_MODULE,
#if IS_ENABLED(CONFIG_PM)
.pm = &s2mpu14_pmic_pm,
#endif
.suppress_bind_attrs = true,
},
.probe = s2mpu14_pmic_probe,
.remove = s2mpu14_pmic_remove,
.shutdown = s2mpu14_pmic_shutdown,
.id_table = s2mpu14_pmic_id,
};
static int __init s2mpu14_pmic_init(void)
{
return platform_driver_register(&s2mpu14_pmic_driver);
}
subsys_initcall(s2mpu14_pmic_init);
static void __exit s2mpu14_pmic_exit(void)
{
platform_driver_unregister(&s2mpu14_pmic_driver);
}
module_exit(s2mpu14_pmic_exit);
/* Module information */
MODULE_AUTHOR("Samsung Electronics");
MODULE_DESCRIPTION("SAMSUNG S2MPU14 Regulator Driver");
MODULE_LICENSE("GPL");
Reference in a new issue Copy permalink