116 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <linux/module.h>3#include <linux/i2c.h>4#include <linux/of.h>5#include <linux/regulator/driver.h>6#include <linux/regmap.h>7 8static const struct regulator_ops pg86x_ops = {9 .set_voltage_sel = regulator_set_voltage_sel_regmap,10 .get_voltage_sel = regulator_get_voltage_sel_regmap,11 .list_voltage = regulator_list_voltage_linear_range,12};13 14static const struct linear_range pg86x_buck1_ranges[] = {15 REGULATOR_LINEAR_RANGE( 0, 0, 10, 0),16 REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),17 REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),18};19 20static const struct linear_range pg86x_buck2_ranges[] = {21 REGULATOR_LINEAR_RANGE( 0, 0, 15, 0),22 REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),23 REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),24};25 26static const struct regulator_desc pg86x_regulators[] = {27 {28 .id = 0,29 .type = REGULATOR_VOLTAGE,30 .name = "buck1",31 .of_match = of_match_ptr("buck1"),32 .n_voltages = 11 + 24 + 13,33 .linear_ranges = pg86x_buck1_ranges,34 .n_linear_ranges = 3,35 .vsel_reg = 0x24,36 .vsel_mask = 0xff,37 .ops = &pg86x_ops,38 .owner = THIS_MODULE39 },40 {41 .id = 1,42 .type = REGULATOR_VOLTAGE,43 .name = "buck2",44 .of_match = of_match_ptr("buck2"),45 .n_voltages = 16 + 24 + 13,46 .linear_ranges = pg86x_buck2_ranges,47 .n_linear_ranges = 3,48 .vsel_reg = 0x13,49 .vsel_mask = 0xff,50 .ops = &pg86x_ops,51 .owner = THIS_MODULE52 },53};54 55static const struct regmap_config pg86x_regmap = {56 .reg_bits = 8,57 .val_bits = 8,58};59 60static int pg86x_i2c_probe(struct i2c_client *i2c)61{62 int id, ret;63 struct regulator_config config = {.dev = &i2c->dev};64 struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);65 66 if (IS_ERR(regmap)) {67 ret = PTR_ERR(regmap);68 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);69 return ret;70 }71 72 for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {73 struct regulator_dev *rdev;74 rdev = devm_regulator_register(&i2c->dev,75 &pg86x_regulators[id],76 &config);77 if (IS_ERR(rdev)) {78 ret = PTR_ERR(rdev);79 dev_err(&i2c->dev, "failed to register %s: %d\n",80 pg86x_regulators[id].name, ret);81 return ret;82 }83 }84 return 0;85}86 87static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {88 { .compatible = "marvell,88pg867" },89 { .compatible = "marvell,88pg868" },90 { }91};92MODULE_DEVICE_TABLE(of, pg86x_dt_ids);93 94static const struct i2c_device_id pg86x_i2c_id[] = {95 { "88pg867", },96 { "88pg868", },97 { }98};99MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);100 101static struct i2c_driver pg86x_regulator_driver = {102 .driver = {103 .name = "88pg86x",104 .probe_type = PROBE_PREFER_ASYNCHRONOUS,105 .of_match_table = of_match_ptr(pg86x_dt_ids),106 },107 .probe = pg86x_i2c_probe,108 .id_table = pg86x_i2c_id,109};110 111module_i2c_driver(pg86x_regulator_driver);112 113MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");114MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");115MODULE_LICENSE("GPL");116