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