drivers/regulator/88pg86x.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/module.h>
0003 #include <linux/i2c.h>
0004 #include <linux/of.h>
0005 #include <linux/regulator/driver.h>
0006 #include <linux/regmap.h>
0007
0008 static const struct regulator_ops pg86x_ops = {
0009     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0010     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0011     .list_voltage = regulator_list_voltage_linear_range,
0012 };
0013
0014 static const struct linear_range pg86x_buck1_ranges[] = {
0015     REGULATOR_LINEAR_RANGE(      0,  0, 10,     0),
0016     REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
0017     REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
0018 };
0019
0020 static const struct linear_range pg86x_buck2_ranges[] = {
0021     REGULATOR_LINEAR_RANGE(      0,  0, 15,     0),
0022     REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
0023     REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
0024 };
0025
0026 static const struct regulator_desc pg86x_regulators[] = {
0027     {
0028         .id = 0,
0029         .type = REGULATOR_VOLTAGE,
0030         .name = "buck1",
0031         .of_match = of_match_ptr("buck1"),
0032         .n_voltages = 11 + 24 + 13,
0033         .linear_ranges = pg86x_buck1_ranges,
0034         .n_linear_ranges = 3,
0035         .vsel_reg  = 0x24,
0036         .vsel_mask = 0xff,
0037         .ops = &pg86x_ops,
0038         .owner = THIS_MODULE
0039     },
0040     {
0041         .id = 1,
0042         .type = REGULATOR_VOLTAGE,
0043         .name = "buck2",
0044         .of_match = of_match_ptr("buck2"),
0045         .n_voltages = 16 + 24 + 13,
0046         .linear_ranges = pg86x_buck2_ranges,
0047         .n_linear_ranges = 3,
0048         .vsel_reg  = 0x13,
0049         .vsel_mask = 0xff,
0050         .ops = &pg86x_ops,
0051         .owner = THIS_MODULE
0052     },
0053 };
0054
0055 static const struct regmap_config pg86x_regmap = {
0056     .reg_bits = 8,
0057     .val_bits = 8,
0058 };
0059
0060 static int pg86x_i2c_probe(struct i2c_client *i2c)
0061 {
0062     int id, ret;
0063     struct regulator_config config = {.dev = &i2c->dev};
0064     struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
0065
0066     if (IS_ERR(regmap)) {
0067         ret = PTR_ERR(regmap);
0068         dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
0069         return ret;
0070     }
0071
0072     for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
0073         struct regulator_dev *rdev;
0074         rdev = devm_regulator_register(&i2c->dev,
0075                            &pg86x_regulators[id],
0076                            &config);
0077         if (IS_ERR(rdev)) {
0078             ret = PTR_ERR(rdev);
0079             dev_err(&i2c->dev, "failed to register %s: %d\n",
0080                 pg86x_regulators[id].name, ret);
0081             return ret;
0082         }
0083     }
0084     return 0;
0085 }
0086
0087 static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
0088     { .compatible = "marvell,88pg867" },
0089     { .compatible = "marvell,88pg868" },
0090     { }
0091 };
0092 MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
0093
0094 static const struct i2c_device_id pg86x_i2c_id[] = {
0095     { "88pg867", },
0096     { "88pg868", },
0097     { }
0098 };
0099 MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
0100
0101 static struct i2c_driver pg86x_regulator_driver = {
0102     .driver = {
0103         .name = "88pg86x",
0104         .of_match_table = of_match_ptr(pg86x_dt_ids),
0105     },
0106     .probe_new = pg86x_i2c_probe,
0107     .id_table = pg86x_i2c_id,
0108 };
0109
0110 module_i2c_driver(pg86x_regulator_driver);
0111
0112 MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
0113 MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
0114 MODULE_LICENSE("GPL");