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// SPDX-License-Identifier: GPL-2.0+
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
enum fan53880_regulator_ids {
FAN53880_LDO1,
FAN53880_LDO2,
FAN53880_LDO3,
FAN53880_LDO4,
FAN53880_BUCK,
FAN53880_BOOST,
};
enum fan53880_registers {
FAN53880_PRODUCT_ID = 0x00,
FAN53880_SILICON_REV,
FAN53880_BUCKVOUT,
FAN53880_BOOSTVOUT,
FAN53880_LDO1VOUT,
FAN53880_LDO2VOUT,
FAN53880_LDO3VOUT,
FAN53880_LDO4VOUT,
FAN53880_IOUT,
FAN53880_ENABLE,
FAN53880_ENABLE_BOOST,
};
#define FAN53880_ID 0x01
static const struct regulator_ops fan53880_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
#define FAN53880_LDO(_num, _supply, _default) \
[FAN53880_LDO ## _num] = { \
.name = "LDO"#_num, \
.of_match = "LDO"#_num, \
.regulators_node = "regulators", \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.linear_ranges = (struct linear_range[]) { \
REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0), \
REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \
}, \
.n_linear_ranges = 2, \
.n_voltages = 0x74, \
.vsel_reg = FAN53880_LDO ## _num ## VOUT, \
.vsel_mask = 0x7f, \
.enable_reg = FAN53880_ENABLE, \
.enable_mask = BIT(_num - 1), \
.enable_time = 150, \
.supply_name = _supply, \
.ops = &fan53880_ops, \
}
static const struct regulator_desc fan53880_regulators[] = {
FAN53880_LDO(1, "VIN12", 2800000),
FAN53880_LDO(2, "VIN12", 2800000),
FAN53880_LDO(3, "VIN3", 1800000),
FAN53880_LDO(4, "VIN4", 1800000),
[FAN53880_BUCK] = {
.name = "BUCK",
.of_match = "BUCK",
.regulators_node = "regulators",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.linear_ranges = (struct linear_range[]) {
REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0),
REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500),
},
.n_linear_ranges = 2,
.n_voltages = 0xf8,
.vsel_reg = FAN53880_BUCKVOUT,
.vsel_mask = 0xff,
.enable_reg = FAN53880_ENABLE,
.enable_mask = 0x10,
.enable_time = 480,
.supply_name = "PVIN",
.ops = &fan53880_ops,
},
[FAN53880_BOOST] = {
.name = "BOOST",
.of_match = "BOOST",
.regulators_node = "regulators",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.linear_ranges = (struct linear_range[]) {
REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0),
REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000),
},
.n_linear_ranges = 2,
.n_voltages = 0x71,
.vsel_reg = FAN53880_BOOSTVOUT,
.vsel_mask = 0x7f,
.enable_reg = FAN53880_ENABLE_BOOST,
.enable_mask = 0xff,
.enable_time = 580,
.supply_name = "PVIN",
.ops = &fan53880_ops,
},
};
static const struct regmap_config fan53880_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = FAN53880_ENABLE_BOOST,
};
static int fan53880_i2c_probe(struct i2c_client *i2c)
{
struct regulator_config config = { };
struct regulator_dev *rdev;
struct regmap *regmap;
int i, ret;
unsigned int data;
regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
return ret;
}
ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret);
return ret;
}
if (data != FAN53880_ID) {
dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data);
return -ENODEV;
}
config.dev = &i2c->dev;
config.init_data = NULL;
for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) {
rdev = devm_regulator_register(&i2c->dev,
&fan53880_regulators[i],
&config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&i2c->dev, "Failed to register %s: %d\n",
fan53880_regulators[i].name, ret);
return ret;
}
}
return 0;
}
static const struct of_device_id fan53880_dt_ids[] = {
{ .compatible = "onnn,fan53880", },
{}
};
MODULE_DEVICE_TABLE(of, fan53880_dt_ids);
static const struct i2c_device_id fan53880_i2c_id[] = {
{ "fan53880", },
{}
};
MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id);
static struct i2c_driver fan53880_regulator_driver = {
.driver = {
.name = "fan53880",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = fan53880_dt_ids,
},
.probe = fan53880_i2c_probe,
.id_table = fan53880_i2c_id,
};
module_i2c_driver(fan53880_regulator_driver);
MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver");
MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>");
MODULE_LICENSE("GPL");
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