diff options
Diffstat (limited to 'drivers/regulator/fan53880.c')
| -rw-r--r-- | drivers/regulator/fan53880.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/drivers/regulator/fan53880.c b/drivers/regulator/fan53880.c new file mode 100644 index 0000000000..6cb5656845 --- /dev/null +++ b/drivers/regulator/fan53880.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0+ +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> + +enum fan53880_regulator_ids { + FAN53880_LDO1, + FAN53880_LDO2, + FAN53880_LDO3, + FAN53880_LDO4, + FAN53880_BUCK, + FAN53880_BOOST, +}; + +enum fan53880_registers { + FAN53880_PRODUCT_ID = 0x00, + FAN53880_SILICON_REV, + FAN53880_BUCKVOUT, + FAN53880_BOOSTVOUT, + FAN53880_LDO1VOUT, + FAN53880_LDO2VOUT, + FAN53880_LDO3VOUT, + FAN53880_LDO4VOUT, + FAN53880_IOUT, + FAN53880_ENABLE, + FAN53880_ENABLE_BOOST, +}; + +#define FAN53880_ID 0x01 + +static const struct regulator_ops fan53880_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +#define FAN53880_LDO(_num, _supply, _default) \ + [FAN53880_LDO ## _num] = { \ + .name = "LDO"#_num, \ + .of_match = "LDO"#_num, \ + .regulators_node = "regulators", \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .linear_ranges = (struct linear_range[]) { \ + REGULATOR_LINEAR_RANGE(_default, 0x0, 0x0, 0), \ + REGULATOR_LINEAR_RANGE(800000, 0xf, 0x73, 25000), \ + }, \ + .n_linear_ranges = 2, \ + .n_voltages = 0x74, \ + .vsel_reg = FAN53880_LDO ## _num ## VOUT, \ + .vsel_mask = 0x7f, \ + .enable_reg = FAN53880_ENABLE, \ + .enable_mask = BIT(_num - 1), \ + .enable_time = 150, \ + .supply_name = _supply, \ + .ops = &fan53880_ops, \ + } + +static const struct regulator_desc fan53880_regulators[] = { + FAN53880_LDO(1, "VIN12", 2800000), + FAN53880_LDO(2, "VIN12", 2800000), + FAN53880_LDO(3, "VIN3", 1800000), + FAN53880_LDO(4, "VIN4", 1800000), + [FAN53880_BUCK] = { + .name = "BUCK", + .of_match = "BUCK", + .regulators_node = "regulators", + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .linear_ranges = (struct linear_range[]) { + REGULATOR_LINEAR_RANGE(1100000, 0x0, 0x0, 0), + REGULATOR_LINEAR_RANGE(600000, 0x1f, 0xf7, 12500), + }, + .n_linear_ranges = 2, + .n_voltages = 0xf8, + .vsel_reg = FAN53880_BUCKVOUT, + .vsel_mask = 0xff, + .enable_reg = FAN53880_ENABLE, + .enable_mask = 0x10, + .enable_time = 480, + .supply_name = "PVIN", + .ops = &fan53880_ops, + }, + [FAN53880_BOOST] = { + .name = "BOOST", + .of_match = "BOOST", + .regulators_node = "regulators", + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .linear_ranges = (struct linear_range[]) { + REGULATOR_LINEAR_RANGE(5000000, 0x0, 0x0, 0), + REGULATOR_LINEAR_RANGE(3000000, 0x4, 0x70, 25000), + }, + .n_linear_ranges = 2, + .n_voltages = 0x71, + .vsel_reg = FAN53880_BOOSTVOUT, + .vsel_mask = 0x7f, + .enable_reg = FAN53880_ENABLE_BOOST, + .enable_mask = 0xff, + .enable_time = 580, + .supply_name = "PVIN", + .ops = &fan53880_ops, + }, +}; + +static const struct regmap_config fan53880_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = FAN53880_ENABLE_BOOST, +}; + +static int fan53880_i2c_probe(struct i2c_client *i2c) +{ + struct regulator_config config = { }; + struct regulator_dev *rdev; + struct regmap *regmap; + int i, ret; + unsigned int data; + + regmap = devm_regmap_init_i2c(i2c, &fan53880_regmap); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret); + return ret; + } + + ret = regmap_read(regmap, FAN53880_PRODUCT_ID, &data); + if (ret < 0) { + dev_err(&i2c->dev, "Failed to read PRODUCT_ID: %d\n", ret); + return ret; + } + if (data != FAN53880_ID) { + dev_err(&i2c->dev, "Unsupported device id: 0x%x.\n", data); + return -ENODEV; + } + + config.dev = &i2c->dev; + config.init_data = NULL; + + for (i = 0; i < ARRAY_SIZE(fan53880_regulators); i++) { + rdev = devm_regulator_register(&i2c->dev, + &fan53880_regulators[i], + &config); + if (IS_ERR(rdev)) { + ret = PTR_ERR(rdev); + dev_err(&i2c->dev, "Failed to register %s: %d\n", + fan53880_regulators[i].name, ret); + return ret; + } + } + + return 0; +} + +static const struct of_device_id fan53880_dt_ids[] = { + { .compatible = "onnn,fan53880", }, + {} +}; +MODULE_DEVICE_TABLE(of, fan53880_dt_ids); + +static const struct i2c_device_id fan53880_i2c_id[] = { + { "fan53880", }, + {} +}; +MODULE_DEVICE_TABLE(i2c, fan53880_i2c_id); + +static struct i2c_driver fan53880_regulator_driver = { + .driver = { + .name = "fan53880", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = fan53880_dt_ids, + }, + .probe = fan53880_i2c_probe, + .id_table = fan53880_i2c_id, +}; +module_i2c_driver(fan53880_regulator_driver); + +MODULE_DESCRIPTION("FAN53880 PMIC voltage regulator driver"); +MODULE_AUTHOR("Christoph Fritz <chf.fritz@googlemail.com>"); +MODULE_LICENSE("GPL"); |