1a265b03bSAlexander Monakov // SPDX-License-Identifier: GPL-2.0 2a265b03bSAlexander Monakov #include <linux/module.h> 3a265b03bSAlexander Monakov #include <linux/i2c.h> 4a265b03bSAlexander Monakov #include <linux/of.h> 5a265b03bSAlexander Monakov #include <linux/regulator/driver.h> 6a265b03bSAlexander Monakov #include <linux/regmap.h> 7a265b03bSAlexander Monakov 8a265b03bSAlexander Monakov static const struct regulator_ops pg86x_ops = { 9a265b03bSAlexander Monakov .set_voltage_sel = regulator_set_voltage_sel_regmap, 10a265b03bSAlexander Monakov .get_voltage_sel = regulator_get_voltage_sel_regmap, 11a265b03bSAlexander Monakov .list_voltage = regulator_list_voltage_linear_range, 12a265b03bSAlexander Monakov }; 13a265b03bSAlexander Monakov 1460ab7f41SMatti Vaittinen static const struct linear_range pg86x_buck1_ranges[] = { 15a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE( 0, 0, 10, 0), 16a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000), 17a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000), 18a265b03bSAlexander Monakov }; 19a265b03bSAlexander Monakov 2060ab7f41SMatti Vaittinen static const struct linear_range pg86x_buck2_ranges[] = { 21a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE( 0, 0, 15, 0), 22a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000), 23a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000), 24a265b03bSAlexander Monakov }; 25a265b03bSAlexander Monakov 26a265b03bSAlexander Monakov static const struct regulator_desc pg86x_regulators[] = { 27a265b03bSAlexander Monakov { 28a265b03bSAlexander Monakov .id = 0, 29a265b03bSAlexander Monakov .type = REGULATOR_VOLTAGE, 30a265b03bSAlexander Monakov .name = "buck1", 31a265b03bSAlexander Monakov .of_match = of_match_ptr("buck1"), 32a265b03bSAlexander Monakov .n_voltages = 11 + 24 + 13, 33a265b03bSAlexander Monakov .linear_ranges = pg86x_buck1_ranges, 34a265b03bSAlexander Monakov .n_linear_ranges = 3, 35a265b03bSAlexander Monakov .vsel_reg = 0x24, 36a265b03bSAlexander Monakov .vsel_mask = 0xff, 37a265b03bSAlexander Monakov .ops = &pg86x_ops, 38a265b03bSAlexander Monakov .owner = THIS_MODULE 39a265b03bSAlexander Monakov }, 40a265b03bSAlexander Monakov { 41a265b03bSAlexander Monakov .id = 1, 42a265b03bSAlexander Monakov .type = REGULATOR_VOLTAGE, 43a265b03bSAlexander Monakov .name = "buck2", 44a265b03bSAlexander Monakov .of_match = of_match_ptr("buck2"), 45a265b03bSAlexander Monakov .n_voltages = 16 + 24 + 13, 46a265b03bSAlexander Monakov .linear_ranges = pg86x_buck2_ranges, 47a265b03bSAlexander Monakov .n_linear_ranges = 3, 48a265b03bSAlexander Monakov .vsel_reg = 0x13, 49a265b03bSAlexander Monakov .vsel_mask = 0xff, 50a265b03bSAlexander Monakov .ops = &pg86x_ops, 51a265b03bSAlexander Monakov .owner = THIS_MODULE 52a265b03bSAlexander Monakov }, 53a265b03bSAlexander Monakov }; 54a265b03bSAlexander Monakov 55a265b03bSAlexander Monakov static const struct regmap_config pg86x_regmap = { 56a265b03bSAlexander Monakov .reg_bits = 8, 57a265b03bSAlexander Monakov .val_bits = 8, 58a265b03bSAlexander Monakov }; 59a265b03bSAlexander Monakov 60a265b03bSAlexander Monakov static int pg86x_i2c_probe(struct i2c_client *i2c) 61a265b03bSAlexander Monakov { 62a265b03bSAlexander Monakov int id, ret; 63a265b03bSAlexander Monakov struct regulator_config config = {.dev = &i2c->dev}; 64a265b03bSAlexander Monakov struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap); 65a265b03bSAlexander Monakov 66a265b03bSAlexander Monakov if (IS_ERR(regmap)) { 67a265b03bSAlexander Monakov ret = PTR_ERR(regmap); 68a265b03bSAlexander Monakov dev_err(&i2c->dev, "regmap init failed: %d\n", ret); 69a265b03bSAlexander Monakov return ret; 70a265b03bSAlexander Monakov } 71a265b03bSAlexander Monakov 72a265b03bSAlexander Monakov for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) { 73a265b03bSAlexander Monakov struct regulator_dev *rdev; 74a265b03bSAlexander Monakov rdev = devm_regulator_register(&i2c->dev, 75a265b03bSAlexander Monakov &pg86x_regulators[id], 76a265b03bSAlexander Monakov &config); 77a265b03bSAlexander Monakov if (IS_ERR(rdev)) { 78a265b03bSAlexander Monakov ret = PTR_ERR(rdev); 79a265b03bSAlexander Monakov dev_err(&i2c->dev, "failed to register %s: %d\n", 80a265b03bSAlexander Monakov pg86x_regulators[id].name, ret); 81a265b03bSAlexander Monakov return ret; 82a265b03bSAlexander Monakov } 83a265b03bSAlexander Monakov } 84a265b03bSAlexander Monakov return 0; 85a265b03bSAlexander Monakov } 86a265b03bSAlexander Monakov 87a265b03bSAlexander Monakov static const struct of_device_id pg86x_dt_ids [] = { 88a265b03bSAlexander Monakov { .compatible = "marvell,88pg867" }, 89a265b03bSAlexander Monakov { .compatible = "marvell,88pg868" }, 90a265b03bSAlexander Monakov { } 91a265b03bSAlexander Monakov }; 92a265b03bSAlexander Monakov MODULE_DEVICE_TABLE(of, pg86x_dt_ids); 93a265b03bSAlexander Monakov 94a265b03bSAlexander Monakov static const struct i2c_device_id pg86x_i2c_id[] = { 95a265b03bSAlexander Monakov { "88pg867", }, 96a265b03bSAlexander Monakov { "88pg868", }, 97a265b03bSAlexander Monakov { } 98a265b03bSAlexander Monakov }; 99a265b03bSAlexander Monakov MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id); 100a265b03bSAlexander Monakov 101a265b03bSAlexander Monakov static struct i2c_driver pg86x_regulator_driver = { 102a265b03bSAlexander Monakov .driver = { 103a265b03bSAlexander Monakov .name = "88pg86x", 104a265b03bSAlexander Monakov .of_match_table = of_match_ptr(pg86x_dt_ids), 105a265b03bSAlexander Monakov }, 106a265b03bSAlexander Monakov .probe_new = pg86x_i2c_probe, 107a265b03bSAlexander Monakov .id_table = pg86x_i2c_id, 108a265b03bSAlexander Monakov }; 109a265b03bSAlexander Monakov 110a265b03bSAlexander Monakov module_i2c_driver(pg86x_regulator_driver); 111a265b03bSAlexander Monakov 112a265b03bSAlexander Monakov MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator"); 113a265b03bSAlexander Monakov MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>"); 114a265b03bSAlexander Monakov MODULE_LICENSE("GPL"); 115