314 lines
9.9 KiB
C
314 lines
9.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2021 Rockchip Electronics Co., Ltd.
|
|
*
|
|
* Author: Shunqing Chen <csq@rock-chips.com>
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
#define WL2868C_DEVICE_D1 0x00
|
|
#define WL2868C_DEVICE_D2 0x01
|
|
#define WL2868C_DISCHARGE_RESISTORS 0x02
|
|
#define WL2868C_LDO1_VOUT 0x03
|
|
#define WL2868C_LDO2_VOUT 0x04
|
|
#define WL2868C_LDO3_VOUT 0x05
|
|
#define WL2868C_LDO4_VOUT 0x06
|
|
#define WL2868C_LDO5_VOUT 0x07
|
|
#define WL2868C_LDO6_VOUT 0x08
|
|
#define WL2868C_LDO7_VOUT 0x09
|
|
#define WL2868C_LDO1_LDO2_SEQ 0x0a
|
|
#define WL2868C_LDO3_LDO4_SEQ 0x0b
|
|
#define WL2868C_LDO5_LDO6_SEQ 0x0c
|
|
#define WL2868C_LDO7_SEQ 0x0d
|
|
#define WL2868C_LDO_EN 0x0e
|
|
#define WL2868C_SEQ_STATUS 0x0f
|
|
#define WL2868C_LDO1_STATUS 0x10
|
|
#define WL2868C_LDO1_OCP_CTL 0x11
|
|
#define WL2868C_LDO2_STATUS 0x12
|
|
#define WL2868C_LDO2_OCP_CTL 0x13
|
|
#define WL2868C_LDO3_STATUS 0x14
|
|
#define WL2868C_LDO3_OCP_CTL 0x15
|
|
#define WL2868C_LDO4_STATUS 0x16
|
|
#define WL2868C_LDO4_OCP_CTL 0x17
|
|
#define WL2868C_LDO5_STATUS 0x18
|
|
#define WL2868C_LDO5_OCP_CTL 0x19
|
|
#define WL2868C_LDO6_STATUS 0x1a
|
|
#define WL2868C_LDO6_OCP_CTL 0x1b
|
|
#define WL2868C_LDO7_STATUS 0x1c
|
|
#define WL2868C_LDO7_OCP_CTL 0x1d
|
|
#define WL2868C_REPROGRAMMABLE_I2C_ADDR 0x1e
|
|
#define RESERVED_1 0x1f
|
|
#define INT_LATCHED_CLR 0x20
|
|
#define INT_EN_SET 0x21
|
|
#define INT_LATCHED_STS 0x22
|
|
#define INT_PENDING_STS 0x23
|
|
#define UVLO_CTL 0x24
|
|
#define RESERVED_2 0x25
|
|
|
|
#define WL2868C_VSEL_MASK 0xff
|
|
|
|
enum wl2868c_regulators {
|
|
WL2868C_REGULATOR_LDO1 = 0,
|
|
WL2868C_REGULATOR_LDO2,
|
|
WL2868C_REGULATOR_LDO3,
|
|
WL2868C_REGULATOR_LDO4,
|
|
WL2868C_REGULATOR_LDO5,
|
|
WL2868C_REGULATOR_LDO6,
|
|
WL2868C_REGULATOR_LDO7,
|
|
WL2868C_MAX_REGULATORS,
|
|
};
|
|
|
|
struct wl2868c {
|
|
struct device *dev;
|
|
struct regmap *regmap;
|
|
struct regulator_dev *rdev;
|
|
struct gpio_desc *reset_gpio;
|
|
int min_dropout_uv;
|
|
int ldo_vout[7];
|
|
int ldo_en;
|
|
};
|
|
|
|
static const struct regulator_ops wl2868c_reg_ops = {
|
|
.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,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
};
|
|
|
|
#define WL2868C_DESC(_id, _match, _supply, _min, _max, _step, _vreg, \
|
|
_vmask, _ereg, _emask, _enval, _disval) \
|
|
{ \
|
|
.name = (_match), \
|
|
.supply_name = (_supply), \
|
|
.of_match = of_match_ptr(_match), \
|
|
.regulators_node = of_match_ptr("regulators"), \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.id = (_id), \
|
|
.n_voltages = (((_max) - (_min)) / (_step) + 1), \
|
|
.owner = THIS_MODULE, \
|
|
.min_uV = (_min) * 1000, \
|
|
.uV_step = (_step) * 1000, \
|
|
.vsel_reg = (_vreg), \
|
|
.vsel_mask = (_vmask), \
|
|
.enable_reg = (_ereg), \
|
|
.enable_mask = (_emask), \
|
|
.enable_val = (_enval), \
|
|
.disable_val = (_disval), \
|
|
.ops = &wl2868c_reg_ops, \
|
|
}
|
|
|
|
static const struct regulator_desc wl2868c_reg[] = {
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO1, "WL_LDO1", "ldo1", 496, 2536, 8,
|
|
WL2868C_LDO1_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(0), BIT(0), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO2, "WL_LDO2", "ldo2", 496, 2536, 8,
|
|
WL2868C_LDO2_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(1), BIT(1), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO3, "WL_LDO3", "ldo3", 1504, 3544, 8,
|
|
WL2868C_LDO3_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(2), BIT(2), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO4, "WL_LDO4", "ldo4", 1504, 3544, 8,
|
|
WL2868C_LDO4_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(3), BIT(3), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO5, "WL_LDO5", "ldo5", 1504, 3544, 8,
|
|
WL2868C_LDO5_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(4), BIT(4), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO6, "WL_LDO6", "ldo6", 1504, 3544, 8,
|
|
WL2868C_LDO6_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(5), BIT(5), 0),
|
|
WL2868C_DESC(WL2868C_REGULATOR_LDO7, "WL_LDO7", "ldo7", 1504, 3544, 8,
|
|
WL2868C_LDO7_VOUT, WL2868C_VSEL_MASK, WL2868C_LDO_EN, BIT(6), BIT(6), 0),
|
|
};
|
|
|
|
static const struct regmap_range wl2868c_writeable_ranges[] = {
|
|
regmap_reg_range(WL2868C_DISCHARGE_RESISTORS, WL2868C_SEQ_STATUS),
|
|
regmap_reg_range(WL2868C_LDO1_OCP_CTL, WL2868C_LDO1_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO2_OCP_CTL, WL2868C_LDO2_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO3_OCP_CTL, WL2868C_LDO3_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO4_OCP_CTL, WL2868C_LDO4_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO5_OCP_CTL, WL2868C_LDO5_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO6_OCP_CTL, WL2868C_LDO6_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO7_OCP_CTL, WL2868C_REPROGRAMMABLE_I2C_ADDR),
|
|
regmap_reg_range(INT_LATCHED_CLR, INT_LATCHED_CLR),
|
|
regmap_reg_range(INT_EN_SET, INT_EN_SET),
|
|
regmap_reg_range(UVLO_CTL, UVLO_CTL),
|
|
};
|
|
|
|
static const struct regmap_range wl2868c_readable_ranges[] = {
|
|
regmap_reg_range(WL2868C_DEVICE_D1, RESERVED_2),
|
|
};
|
|
|
|
static const struct regmap_range wl2868c_volatile_ranges[] = {
|
|
regmap_reg_range(WL2868C_DISCHARGE_RESISTORS, WL2868C_SEQ_STATUS),
|
|
regmap_reg_range(WL2868C_LDO1_OCP_CTL, WL2868C_LDO1_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO2_OCP_CTL, WL2868C_LDO2_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO3_OCP_CTL, WL2868C_LDO3_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO4_OCP_CTL, WL2868C_LDO4_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO5_OCP_CTL, WL2868C_LDO5_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO6_OCP_CTL, WL2868C_LDO6_OCP_CTL),
|
|
regmap_reg_range(WL2868C_LDO7_OCP_CTL, WL2868C_REPROGRAMMABLE_I2C_ADDR),
|
|
regmap_reg_range(INT_LATCHED_CLR, INT_LATCHED_CLR),
|
|
regmap_reg_range(INT_EN_SET, INT_EN_SET),
|
|
regmap_reg_range(UVLO_CTL, UVLO_CTL),
|
|
};
|
|
|
|
static const struct regmap_access_table wl2868c_writeable_table = {
|
|
.yes_ranges = wl2868c_writeable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(wl2868c_writeable_ranges),
|
|
};
|
|
|
|
static const struct regmap_access_table wl2868c_readable_table = {
|
|
.yes_ranges = wl2868c_readable_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(wl2868c_readable_ranges),
|
|
};
|
|
|
|
static const struct regmap_access_table wl2868c_volatile_table = {
|
|
.yes_ranges = wl2868c_volatile_ranges,
|
|
.n_yes_ranges = ARRAY_SIZE(wl2868c_volatile_ranges),
|
|
};
|
|
|
|
static const struct regmap_config wl2868c_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = RESERVED_2,
|
|
.wr_table = &wl2868c_writeable_table,
|
|
.rd_table = &wl2868c_readable_table,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
.volatile_table = &wl2868c_volatile_table,
|
|
};
|
|
|
|
static void wl2868c_reset(struct wl2868c *wl2868c)
|
|
{
|
|
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
|
|
usleep_range(10000, 11000);
|
|
gpiod_set_value_cansleep(wl2868c->reset_gpio, 1);
|
|
usleep_range(10000, 11000);
|
|
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
|
|
usleep_range(10000, 11000);
|
|
}
|
|
|
|
static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct regulator_config config = {};
|
|
struct regulator_dev *rdev;
|
|
const struct regulator_desc *regulators;
|
|
struct wl2868c *wl2868c;
|
|
int ret, i;
|
|
|
|
wl2868c = devm_kzalloc(dev, sizeof(struct wl2868c), GFP_KERNEL);
|
|
if (!wl2868c)
|
|
return -ENOMEM;
|
|
|
|
wl2868c->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(wl2868c->reset_gpio)) {
|
|
ret = PTR_ERR(wl2868c->reset_gpio);
|
|
dev_err(dev, "failed to request reset GPIO: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
wl2868c_reset(wl2868c);
|
|
|
|
i2c_set_clientdata(client, wl2868c);
|
|
wl2868c->dev = dev;
|
|
wl2868c->regmap = devm_regmap_init_i2c(client, &wl2868c_regmap_config);
|
|
if (IS_ERR(wl2868c->regmap)) {
|
|
ret = PTR_ERR(wl2868c->regmap);
|
|
dev_err(dev, "Failed to allocate register map: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
config.dev = &client->dev;
|
|
config.regmap = wl2868c->regmap;
|
|
regulators = wl2868c_reg;
|
|
/* Instantiate the regulators */
|
|
for (i = 0; i < WL2868C_MAX_REGULATORS; i++) {
|
|
rdev = devm_regulator_register(&client->dev,
|
|
®ulators[i], &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&client->dev,
|
|
"failed to register %d regulator\n", i);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wl2868c_regulator_shutdown(struct i2c_client *client)
|
|
{
|
|
struct wl2868c *wl2868c = i2c_get_clientdata(client);
|
|
|
|
if (system_state == SYSTEM_POWER_OFF)
|
|
regmap_write(wl2868c->regmap, WL2868C_LDO_EN, 0x80);
|
|
}
|
|
|
|
static int __maybe_unused wl2868c_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct wl2868c *wl2868c = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
regmap_read(wl2868c->regmap, WL2868C_LDO_EN, &wl2868c->ldo_en);
|
|
for (i = 0; i < ARRAY_SIZE(wl2868c->ldo_vout); i++)
|
|
regmap_read(wl2868c->regmap, WL2868C_LDO1_VOUT + i,
|
|
&wl2868c->ldo_vout[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused wl2868c_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct wl2868c *wl2868c = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
wl2868c_reset(wl2868c);
|
|
for (i = 0; i < ARRAY_SIZE(wl2868c->ldo_vout); i++)
|
|
regmap_write(wl2868c->regmap, WL2868C_LDO1_VOUT + i,
|
|
wl2868c->ldo_vout[i]);
|
|
regmap_write(wl2868c->regmap, WL2868C_LDO_EN, wl2868c->ldo_en);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(wl2868c_pm_ops, wl2868c_suspend, wl2868c_resume);
|
|
|
|
static const struct i2c_device_id wl2868c_i2c_id[] = {
|
|
{ "wl2868c", 0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, wl2868c_i2c_id);
|
|
|
|
static const struct of_device_id wl2868c_of_match[] = {
|
|
{ .compatible = "willsemi,wl2868c" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, wl2868c_of_match);
|
|
|
|
static struct i2c_driver wl2868c_i2c_driver = {
|
|
.driver = {
|
|
.name = "wl2868c",
|
|
.of_match_table = of_match_ptr(wl2868c_of_match),
|
|
.pm = &wl2868c_pm_ops,
|
|
},
|
|
.id_table = wl2868c_i2c_id,
|
|
.probe = wl2868c_i2c_probe,
|
|
.shutdown = wl2868c_regulator_shutdown,
|
|
};
|
|
|
|
module_i2c_driver(wl2868c_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("WL2868C regulator driver");
|
|
MODULE_AUTHOR("Shunqing Chen <csq@rock-chips.com>");
|
|
MODULE_LICENSE("GPL");
|