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// SPDX-License-Identifier: GPL-2.0
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/regulator/driver.h>
#include <linux/regmap.h>
static const struct regulator_ops pg86x_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear_range,
};
static const struct linear_range pg86x_buck1_ranges[] = {
REGULATOR_LINEAR_RANGE( 0, 0, 10, 0),
REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
};
static const struct linear_range pg86x_buck2_ranges[] = {
REGULATOR_LINEAR_RANGE( 0, 0, 15, 0),
REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
};
static const struct regulator_desc pg86x_regulators[] = {
{
.id = 0,
.type = REGULATOR_VOLTAGE,
.name = "buck1",
.of_match = of_match_ptr("buck1"),
.n_voltages = 11 + 24 + 13,
.linear_ranges = pg86x_buck1_ranges,
.n_linear_ranges = 3,
.vsel_reg = 0x24,
.vsel_mask = 0xff,
.ops = &pg86x_ops,
.owner = THIS_MODULE
},
{
.id = 1,
.type = REGULATOR_VOLTAGE,
.name = "buck2",
.of_match = of_match_ptr("buck2"),
.n_voltages = 16 + 24 + 13,
.linear_ranges = pg86x_buck2_ranges,
.n_linear_ranges = 3,
.vsel_reg = 0x13,
.vsel_mask = 0xff,
.ops = &pg86x_ops,
.owner = THIS_MODULE
},
};
static const struct regmap_config pg86x_regmap = {
.reg_bits = 8,
.val_bits = 8,
};
static int pg86x_i2c_probe(struct i2c_client *i2c)
{
int id, ret;
struct regulator_config config = {.dev = &i2c->dev};
struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
return ret;
}
for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
struct regulator_dev *rdev;
rdev = devm_regulator_register(&i2c->dev,
&pg86x_regulators[id],
&config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(&i2c->dev, "failed to register %s: %d\n",
pg86x_regulators[id].name, ret);
return ret;
}
}
return 0;
}
static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
{ .compatible = "marvell,88pg867" },
{ .compatible = "marvell,88pg868" },
{ }
};
MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
static const struct i2c_device_id pg86x_i2c_id[] = {
{ "88pg867", },
{ "88pg868", },
{ }
};
MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
static struct i2c_driver pg86x_regulator_driver = {
.driver = {
.name = "88pg86x",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = of_match_ptr(pg86x_dt_ids),
},
.probe = pg86x_i2c_probe,
.id_table = pg86x_i2c_id,
};
module_i2c_driver(pg86x_regulator_driver);
MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
MODULE_LICENSE("GPL");
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