diff options
Diffstat (limited to 'drivers/regulator/tps65023-regulator.c')
| -rw-r--r-- | drivers/regulator/tps65023-regulator.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c new file mode 100644 index 000000000..f25806531 --- /dev/null +++ b/drivers/regulator/tps65023-regulator.c @@ -0,0 +1,365 @@ +/* + * tps65023-regulator.c + * + * Supports TPS65023 Regulator + * + * Copyright (C) 2009 Texas Instrument Incorporated - https://www.ti.com/ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, + * whether express or implied; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/regmap.h> + +/* Register definitions */ +#define TPS65023_REG_VERSION 0 +#define TPS65023_REG_PGOODZ 1 +#define TPS65023_REG_MASK 2 +#define TPS65023_REG_REG_CTRL 3 +#define TPS65023_REG_CON_CTRL 4 +#define TPS65023_REG_CON_CTRL2 5 +#define TPS65023_REG_DEF_CORE 6 +#define TPS65023_REG_DEFSLEW 7 +#define TPS65023_REG_LDO_CTRL 8 + +/* PGOODZ bitfields */ +#define TPS65023_PGOODZ_PWRFAILZ BIT(7) +#define TPS65023_PGOODZ_LOWBATTZ BIT(6) +#define TPS65023_PGOODZ_VDCDC1 BIT(5) +#define TPS65023_PGOODZ_VDCDC2 BIT(4) +#define TPS65023_PGOODZ_VDCDC3 BIT(3) +#define TPS65023_PGOODZ_LDO2 BIT(2) +#define TPS65023_PGOODZ_LDO1 BIT(1) + +/* MASK bitfields */ +#define TPS65023_MASK_PWRFAILZ BIT(7) +#define TPS65023_MASK_LOWBATTZ BIT(6) +#define TPS65023_MASK_VDCDC1 BIT(5) +#define TPS65023_MASK_VDCDC2 BIT(4) +#define TPS65023_MASK_VDCDC3 BIT(3) +#define TPS65023_MASK_LDO2 BIT(2) +#define TPS65023_MASK_LDO1 BIT(1) + +/* REG_CTRL bitfields */ +#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5) +#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4) +#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3) +#define TPS65023_REG_CTRL_LDO2_EN BIT(2) +#define TPS65023_REG_CTRL_LDO1_EN BIT(1) + +/* REG_CTRL2 bitfields */ +#define TPS65023_REG_CTRL2_GO BIT(7) +#define TPS65023_REG_CTRL2_CORE_ADJ BIT(6) +#define TPS65023_REG_CTRL2_DCDC2 BIT(2) +#define TPS65023_REG_CTRL2_DCDC1 BIT(1) +#define TPS65023_REG_CTRL2_DCDC3 BIT(0) + +/* Number of step-down converters available */ +#define TPS65023_NUM_DCDC 3 +/* Number of LDO voltage regulators available */ +#define TPS65023_NUM_LDO 2 +/* Number of total regulators available */ +#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO) + +/* DCDCs */ +#define TPS65023_DCDC_1 0 +#define TPS65023_DCDC_2 1 +#define TPS65023_DCDC_3 2 +/* LDOs */ +#define TPS65023_LDO_1 3 +#define TPS65023_LDO_2 4 + +#define TPS65023_MAX_REG_ID TPS65023_LDO_2 + +#define TPS65023_REGULATOR_DCDC(_num, _t, _em) \ + { \ + .name = "VDCDC"#_num, \ + .of_match = of_match_ptr("VDCDC"#_num), \ + .regulators_node = of_match_ptr("regulators"), \ + .id = TPS65023_DCDC_##_num, \ + .n_voltages = ARRAY_SIZE(_t), \ + .ops = &tps65023_dcdc_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .volt_table = _t, \ + .vsel_reg = TPS65023_REG_DEF_CORE, \ + .vsel_mask = ARRAY_SIZE(_t) - 1, \ + .enable_mask = _em, \ + .enable_reg = TPS65023_REG_REG_CTRL, \ + .apply_reg = TPS65023_REG_CON_CTRL2, \ + .apply_bit = TPS65023_REG_CTRL2_GO, \ + } \ + +#define TPS65023_REGULATOR_LDO(_num, _t, _vm) \ + { \ + .name = "LDO"#_num, \ + .of_match = of_match_ptr("LDO"#_num), \ + .regulators_node = of_match_ptr("regulators"), \ + .id = TPS65023_LDO_##_num, \ + .n_voltages = ARRAY_SIZE(_t), \ + .ops = &tps65023_ldo_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .volt_table = _t, \ + .vsel_reg = TPS65023_REG_LDO_CTRL, \ + .vsel_mask = _vm, \ + .enable_mask = 1 << (_num), \ + .enable_reg = TPS65023_REG_REG_CTRL, \ + } \ + +/* Supported voltage values for regulators */ +static const unsigned int VCORE_VSEL_table[] = { + 800000, 825000, 850000, 875000, + 900000, 925000, 950000, 975000, + 1000000, 1025000, 1050000, 1075000, + 1100000, 1125000, 1150000, 1175000, + 1200000, 1225000, 1250000, 1275000, + 1300000, 1325000, 1350000, 1375000, + 1400000, 1425000, 1450000, 1475000, + 1500000, 1525000, 1550000, 1600000, +}; + +static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = { + 3300000, +}; + +static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = { + 1800000, +}; + +/* Supported voltage values for LDO regulators for tps65020 */ +static const unsigned int TPS65020_LDO_VSEL_table[] = { + 1000000, 1050000, 1100000, 1300000, + 1800000, 2500000, 3000000, 3300000, +}; + +/* Supported voltage values for LDO regulators + * for tps65021 and tps65023 */ +static const unsigned int TPS65023_LDO1_VSEL_table[] = { + 1000000, 1100000, 1300000, 1800000, + 2200000, 2600000, 2800000, 3150000, +}; + +static const unsigned int TPS65023_LDO2_VSEL_table[] = { + 1050000, 1200000, 1300000, 1800000, + 2500000, 2800000, 3000000, 3300000, +}; + +/* PMIC details */ +struct tps_pmic { + struct regulator_dev *rdev[TPS65023_NUM_REGULATOR]; + const struct tps_driver_data *driver_data; + struct regmap *regmap; +}; + +/* Struct passed as driver data */ +struct tps_driver_data { + const struct regulator_desc *desc; + u8 core_regulator; +}; + +static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int dcdc = rdev_get_id(dev); + + if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) + return -EINVAL; + + if (dcdc != tps->driver_data->core_regulator) + return 0; + + return regulator_get_voltage_sel_regmap(dev); +} + +static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int dcdc = rdev_get_id(dev); + + if (dcdc != tps->driver_data->core_regulator) + return -EINVAL; + + return regulator_set_voltage_sel_regmap(dev, selector); +} + +/* Operations permitted on VDCDCx */ +static const struct regulator_ops tps65023_dcdc_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = tps65023_dcdc_get_voltage_sel, + .set_voltage_sel = tps65023_dcdc_set_voltage_sel, + .list_voltage = regulator_list_voltage_table, + .map_voltage = regulator_map_voltage_ascend, +}; + +/* Operations permitted on LDOx */ +static const struct regulator_ops tps65023_ldo_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_table, + .map_voltage = regulator_map_voltage_ascend, +}; + +static const struct regmap_config tps65023_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regulator_desc tps65020_regulators[] = { + TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20), + TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10), + TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08), + TPS65023_REGULATOR_LDO(1, TPS65020_LDO_VSEL_table, 0x07), + TPS65023_REGULATOR_LDO(2, TPS65020_LDO_VSEL_table, 0x70), +}; + +static const struct regulator_desc tps65021_regulators[] = { + TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20), + TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10), + TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08), + TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07), + TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70), +}; + +static const struct regulator_desc tps65023_regulators[] = { + TPS65023_REGULATOR_DCDC(1, VCORE_VSEL_table, 0x20), + TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_3300000_VSEL_table, 0x10), + TPS65023_REGULATOR_DCDC(3, DCDC_FIXED_1800000_VSEL_table, 0x08), + TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07), + TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70), +}; + +static struct tps_driver_data tps65020_drv_data = { + .desc = tps65020_regulators, + .core_regulator = TPS65023_DCDC_3, +}; + +static struct tps_driver_data tps65021_drv_data = { + .desc = tps65021_regulators, + .core_regulator = TPS65023_DCDC_3, +}; + +static struct tps_driver_data tps65023_drv_data = { + .desc = tps65023_regulators, + .core_regulator = TPS65023_DCDC_1, +}; + +static int tps_65023_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct regulator_init_data *init_data = dev_get_platdata(&client->dev); + struct regulator_config config = { }; + struct tps_pmic *tps; + int i; + int error; + + tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); + if (!tps) + return -ENOMEM; + + tps->driver_data = (struct tps_driver_data *)id->driver_data; + + tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config); + if (IS_ERR(tps->regmap)) { + error = PTR_ERR(tps->regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + error); + return error; + } + + /* common for all regulators */ + config.dev = &client->dev; + config.driver_data = tps; + config.regmap = tps->regmap; + + for (i = 0; i < TPS65023_NUM_REGULATOR; i++) { + if (init_data) + config.init_data = &init_data[i]; + + /* Register the regulators */ + tps->rdev[i] = devm_regulator_register(&client->dev, + &tps->driver_data->desc[i], &config); + if (IS_ERR(tps->rdev[i])) { + dev_err(&client->dev, "failed to register %s\n", + id->name); + return PTR_ERR(tps->rdev[i]); + } + } + + i2c_set_clientdata(client, tps); + + /* Enable setting output voltage by I2C */ + regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2, + TPS65023_REG_CTRL2_CORE_ADJ, 0); + + return 0; +} + +static const struct of_device_id __maybe_unused tps65023_of_match[] = { + { .compatible = "ti,tps65020", .data = &tps65020_drv_data}, + { .compatible = "ti,tps65021", .data = &tps65021_drv_data}, + { .compatible = "ti,tps65023", .data = &tps65023_drv_data}, + {}, +}; +MODULE_DEVICE_TABLE(of, tps65023_of_match); + +static const struct i2c_device_id tps_65023_id[] = { + { + .name = "tps65023", + .driver_data = (kernel_ulong_t)&tps65023_drv_data + }, { + .name = "tps65021", + .driver_data = (kernel_ulong_t)&tps65021_drv_data + }, { + .name = "tps65020", + .driver_data = (kernel_ulong_t)&tps65020_drv_data + }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, tps_65023_id); + +static struct i2c_driver tps_65023_i2c_driver = { + .driver = { + .name = "tps65023", + .of_match_table = of_match_ptr(tps65023_of_match), + }, + .probe = tps_65023_probe, + .id_table = tps_65023_id, +}; + +static int __init tps_65023_init(void) +{ + return i2c_add_driver(&tps_65023_i2c_driver); +} +subsys_initcall(tps_65023_init); + +static void __exit tps_65023_cleanup(void) +{ + i2c_del_driver(&tps_65023_i2c_driver); +} +module_exit(tps_65023_cleanup); + +MODULE_AUTHOR("Texas Instruments"); +MODULE_DESCRIPTION("TPS65023 voltage regulator driver"); +MODULE_LICENSE("GPL v2"); |