// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Copyright (c) 2020 Rockchip Electronics Co. Ltd.
|
*
|
* Author: Guochun Huang <hero.huang@rock-chips.com>
|
*/
|
|
#include <linux/delay.h>
|
#include <linux/err.h>
|
#include <linux/gpio/consumer.h>
|
#include <linux/i2c.h>
|
#include <linux/module.h>
|
#include <linux/regmap.h>
|
#include <linux/regulator/driver.h>
|
#include <linux/regulator/machine.h>
|
|
#define DIO5632_REG_VPOS 0x00
|
#define DIO5632_REG_VNEG 0x01
|
#define DIO5632_REG_APPS_DISP_DISN 0x03
|
#define DIO5632_REG_CONTROL 0x0FF
|
|
#define DIO5632_VOUT_MASK 0x1F
|
#define DIO5632_VOUT_N_VOLTAGE 0x15
|
#define DIO5632_VOUT_VMIN 4000000
|
#define DIO5632_VOUT_VMAX 6000000
|
#define DIO5632_VOUT_STEP 100000
|
|
#define DIO5632_REG_DIS_VPOS BIT(1)
|
#define DIO5632_REG_DIS_VNEG BIT(0)
|
|
#define DIO5632_REGULATOR_ID_VPOS 0
|
#define DIO5632_REGULATOR_ID_VNEG 1
|
#define DIO5632_MAX_REGULATORS 2
|
|
#define DIO5632_ACT_DIS_TIME_SLACK 1000
|
|
struct DIO5632_reg_pdata {
|
struct gpio_desc *en_gpiod;
|
int ena_gpio_state;
|
};
|
|
struct DIO5632_regulator {
|
struct device *dev;
|
struct DIO5632_reg_pdata reg_pdata[DIO5632_MAX_REGULATORS];
|
};
|
|
static int DIO5632_regulator_enable(struct regulator_dev *rdev)
|
{
|
struct DIO5632_regulator *dio = rdev_get_drvdata(rdev);
|
int id = rdev_get_id(rdev);
|
struct DIO5632_reg_pdata *rpdata = &dio->reg_pdata[id];
|
int ret;
|
|
if (!IS_ERR(rpdata->en_gpiod)) {
|
gpiod_set_value_cansleep(rpdata->en_gpiod, 1);
|
rpdata->ena_gpio_state = 1;
|
}
|
|
/* Hardware automatically enable discharge bit in enable */
|
if (rdev->constraints->active_discharge ==
|
REGULATOR_ACTIVE_DISCHARGE_DISABLE) {
|
ret = regulator_set_active_discharge_regmap(rdev, false);
|
if (ret < 0) {
|
dev_err(dio->dev, "Failed to disable active discharge: %d\n",
|
ret);
|
return ret;
|
}
|
}
|
|
return 0;
|
}
|
|
static int DIO5632_regulator_disable(struct regulator_dev *rdev)
|
{
|
struct DIO5632_regulator *dio = rdev_get_drvdata(rdev);
|
int id = rdev_get_id(rdev);
|
struct DIO5632_reg_pdata *rpdata = &dio->reg_pdata[id];
|
|
if (!IS_ERR(rpdata->en_gpiod)) {
|
gpiod_set_value_cansleep(rpdata->en_gpiod, 0);
|
rpdata->ena_gpio_state = 0;
|
}
|
|
return 0;
|
}
|
|
static int DIO5632_regulator_is_enabled(struct regulator_dev *rdev)
|
{
|
struct DIO5632_regulator *dio = rdev_get_drvdata(rdev);
|
int id = rdev_get_id(rdev);
|
struct DIO5632_reg_pdata *rpdata = &dio->reg_pdata[id];
|
|
if (!IS_ERR(rpdata->en_gpiod))
|
return rpdata->ena_gpio_state;
|
|
return 1;
|
}
|
|
static const struct regulator_ops DIO5632_regulator_ops = {
|
.enable = DIO5632_regulator_enable,
|
.disable = DIO5632_regulator_disable,
|
.is_enabled = DIO5632_regulator_is_enabled,
|
.list_voltage = regulator_list_voltage_linear,
|
.map_voltage = regulator_map_voltage_linear,
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
.set_active_discharge = regulator_set_active_discharge_regmap,
|
};
|
|
static int DIO5632_of_parse_cb(struct device_node *np,
|
const struct regulator_desc *desc,
|
struct regulator_config *config)
|
{
|
struct DIO5632_regulator *dio = config->driver_data;
|
struct DIO5632_reg_pdata *rpdata = &dio->reg_pdata[desc->id];
|
int ret;
|
|
rpdata->en_gpiod = devm_fwnode_get_index_gpiod_from_child(dio->dev,
|
"enable", 0, &np->fwnode,
|
GPIOD_OUT_HIGH, "enable");
|
if (IS_ERR_OR_NULL(rpdata->en_gpiod)) {
|
ret = PTR_ERR(rpdata->en_gpiod);
|
|
/* Ignore the error other than probe defer */
|
if (ret == -EPROBE_DEFER)
|
return ret;
|
return 0;
|
}
|
|
return 0;
|
}
|
|
#define DIO5632_REGULATOR_DESC(_id, _name) \
|
[DIO5632_REGULATOR_ID_##_id] = { \
|
.name = "DIO5632-"#_name, \
|
.supply_name = "vin", \
|
.id = DIO5632_REGULATOR_ID_##_id, \
|
.of_match = of_match_ptr(#_name), \
|
.of_parse_cb = DIO5632_of_parse_cb, \
|
.ops = &DIO5632_regulator_ops, \
|
.n_voltages = DIO5632_VOUT_N_VOLTAGE, \
|
.min_uV = DIO5632_VOUT_VMIN, \
|
.uV_step = DIO5632_VOUT_STEP, \
|
.enable_time = 500, \
|
.vsel_mask = DIO5632_VOUT_MASK, \
|
.vsel_reg = DIO5632_REG_##_id, \
|
.active_discharge_off = 0, \
|
.active_discharge_on = DIO5632_REG_DIS_##_id, \
|
.active_discharge_mask = DIO5632_REG_DIS_##_id, \
|
.active_discharge_reg = DIO5632_REG_APPS_DISP_DISN, \
|
.type = REGULATOR_VOLTAGE, \
|
.owner = THIS_MODULE, \
|
}
|
|
static const struct regulator_desc dio_regs_desc[DIO5632_MAX_REGULATORS] = {
|
DIO5632_REGULATOR_DESC(VPOS, outp),
|
DIO5632_REGULATOR_DESC(VNEG, outn),
|
};
|
|
static const struct regmap_range DIO5632_no_reg_ranges[] = {
|
regmap_reg_range(DIO5632_REG_APPS_DISP_DISN + 1,
|
DIO5632_REG_CONTROL - 1),
|
};
|
|
static const struct regmap_access_table DIO5632_no_reg_table = {
|
.no_ranges = DIO5632_no_reg_ranges,
|
.n_no_ranges = ARRAY_SIZE(DIO5632_no_reg_ranges),
|
};
|
|
static const struct regmap_config DIO5632_regmap_config = {
|
.reg_bits = 8,
|
.val_bits = 8,
|
.max_register = DIO5632_REG_CONTROL,
|
.cache_type = REGCACHE_NONE,
|
.rd_table = &DIO5632_no_reg_table,
|
.wr_table = &DIO5632_no_reg_table,
|
};
|
|
static int DIO5632_probe(struct i2c_client *client,
|
const struct i2c_device_id *client_id)
|
{
|
struct device *dev = &client->dev;
|
struct DIO5632_regulator *dio;
|
struct regulator_dev *rdev;
|
struct regmap *rmap;
|
struct regulator_config config = { };
|
int id;
|
int ret;
|
|
dio = devm_kzalloc(dev, sizeof(*dio), GFP_KERNEL);
|
if (!dio)
|
return -ENOMEM;
|
|
rmap = devm_regmap_init_i2c(client, &DIO5632_regmap_config);
|
if (IS_ERR(rmap)) {
|
ret = PTR_ERR(rmap);
|
dev_err(dev, "regmap init failed: %d\n", ret);
|
return ret;
|
}
|
|
i2c_set_clientdata(client, dio);
|
dio->dev = dev;
|
|
for (id = 0; id < DIO5632_MAX_REGULATORS; ++id) {
|
config.regmap = rmap;
|
config.dev = dev;
|
config.driver_data = dio;
|
|
rdev = devm_regulator_register(dev, &dio_regs_desc[id],
|
&config);
|
if (IS_ERR(rdev)) {
|
ret = PTR_ERR(rdev);
|
dev_err(dev, "regulator %s register failed: %d\n",
|
dio_regs_desc[id].name, ret);
|
return ret;
|
}
|
}
|
return 0;
|
}
|
|
static const struct i2c_device_id DIO5632_id[] = {
|
{.name = "DIO5632",},
|
{},
|
};
|
MODULE_DEVICE_TABLE(i2c, DIO5632_id);
|
|
static struct i2c_driver DIO5632_i2c_driver = {
|
.driver = {
|
.name = "DIO5632",
|
},
|
.probe = DIO5632_probe,
|
.id_table = DIO5632_id,
|
};
|
|
module_i2c_driver(DIO5632_i2c_driver);
|
|
MODULE_DESCRIPTION("DIO5632 regulator driver");
|
MODULE_AUTHOR("Guochun Huang <hero.huang@rockchips.com>");
|
MODULE_LICENSE("GPL v2");
|
