| /* |
| * tps65023-regulator.c |
| * |
| * Supports TPS65023 Regulator |
| * |
| * Copyright (C) 2009 Texas Instrument Incorporated - http://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 |
| |
| /* 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_LDO1_VSEL_table[] = { |
| 1000000, 1050000, 1100000, 1300000, |
| 1800000, 2500000, 3000000, 3300000, |
| }; |
| |
| static const unsigned int TPS65020_LDO2_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, |
| }; |
| |
| /* Regulator specific details */ |
| struct tps_info { |
| const char *name; |
| u8 table_len; |
| const unsigned int *table; |
| }; |
| |
| /* PMIC details */ |
| struct tps_pmic { |
| struct regulator_desc desc[TPS65023_NUM_REGULATOR]; |
| struct regulator_dev *rdev[TPS65023_NUM_REGULATOR]; |
| const struct tps_info *info[TPS65023_NUM_REGULATOR]; |
| struct regmap *regmap; |
| u8 core_regulator; |
| }; |
| |
| /* Struct passed as driver data */ |
| struct tps_driver_data { |
| const struct tps_info *info; |
| 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->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->core_regulator) |
| return -EINVAL; |
| |
| return regulator_set_voltage_sel_regmap(dev, selector); |
| } |
| |
| /* Operations permitted on VDCDCx */ |
| static 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, |
| }; |
| |
| /* Operations permitted on LDOx */ |
| static 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, |
| }; |
| |
| static struct regmap_config tps65023_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| }; |
| |
| static int tps_65023_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| const struct tps_driver_data *drv_data = (void *)id->driver_data; |
| const struct tps_info *info = drv_data->info; |
| struct regulator_config config = { }; |
| struct regulator_init_data *init_data; |
| struct regulator_dev *rdev; |
| struct tps_pmic *tps; |
| int i; |
| int error; |
| |
| if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| return -EIO; |
| |
| /** |
| * init_data points to array of regulator_init structures |
| * coming from the board-evm file. |
| */ |
| init_data = client->dev.platform_data; |
| if (!init_data) |
| return -EIO; |
| |
| tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); |
| if (!tps) |
| return -ENOMEM; |
| |
| 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 */ |
| tps->core_regulator = drv_data->core_regulator; |
| |
| for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) { |
| /* Store regulator specific information */ |
| tps->info[i] = info; |
| |
| tps->desc[i].name = info->name; |
| tps->desc[i].id = i; |
| tps->desc[i].n_voltages = info->table_len; |
| tps->desc[i].volt_table = info->table; |
| tps->desc[i].ops = (i > TPS65023_DCDC_3 ? |
| &tps65023_ldo_ops : &tps65023_dcdc_ops); |
| tps->desc[i].type = REGULATOR_VOLTAGE; |
| tps->desc[i].owner = THIS_MODULE; |
| |
| tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL; |
| switch (i) { |
| case TPS65023_LDO_1: |
| tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL; |
| tps->desc[i].vsel_mask = 0x07; |
| tps->desc[i].enable_mask = 1 << 1; |
| break; |
| case TPS65023_LDO_2: |
| tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL; |
| tps->desc[i].vsel_mask = 0x70; |
| tps->desc[i].enable_mask = 1 << 2; |
| break; |
| default: /* DCDCx */ |
| tps->desc[i].enable_mask = |
| 1 << (TPS65023_NUM_REGULATOR - i); |
| tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE; |
| tps->desc[i].vsel_mask = info->table_len - 1; |
| tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2; |
| tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO; |
| } |
| |
| config.dev = &client->dev; |
| config.init_data = init_data; |
| config.driver_data = tps; |
| config.regmap = tps->regmap; |
| |
| /* Register the regulators */ |
| rdev = regulator_register(&tps->desc[i], &config); |
| if (IS_ERR(rdev)) { |
| dev_err(&client->dev, "failed to register %s\n", |
| id->name); |
| error = PTR_ERR(rdev); |
| goto fail; |
| } |
| |
| /* Save regulator for cleanup */ |
| tps->rdev[i] = rdev; |
| } |
| |
| 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, TPS65023_REG_CTRL2_CORE_ADJ); |
| |
| return 0; |
| |
| fail: |
| while (--i >= 0) |
| regulator_unregister(tps->rdev[i]); |
| return error; |
| } |
| |
| static int tps_65023_remove(struct i2c_client *client) |
| { |
| struct tps_pmic *tps = i2c_get_clientdata(client); |
| int i; |
| |
| for (i = 0; i < TPS65023_NUM_REGULATOR; i++) |
| regulator_unregister(tps->rdev[i]); |
| return 0; |
| } |
| |
| static const struct tps_info tps65020_regs[] = { |
| { |
| .name = "VDCDC1", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table), |
| .table = DCDC_FIXED_3300000_VSEL_table, |
| }, |
| { |
| .name = "VDCDC2", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table), |
| .table = DCDC_FIXED_1800000_VSEL_table, |
| }, |
| { |
| .name = "VDCDC3", |
| .table_len = ARRAY_SIZE(VCORE_VSEL_table), |
| .table = VCORE_VSEL_table, |
| }, |
| { |
| .name = "LDO1", |
| .table_len = ARRAY_SIZE(TPS65020_LDO1_VSEL_table), |
| .table = TPS65020_LDO1_VSEL_table, |
| }, |
| { |
| .name = "LDO2", |
| .table_len = ARRAY_SIZE(TPS65020_LDO2_VSEL_table), |
| .table = TPS65020_LDO2_VSEL_table, |
| }, |
| }; |
| |
| static const struct tps_info tps65021_regs[] = { |
| { |
| .name = "VDCDC1", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table), |
| .table = DCDC_FIXED_3300000_VSEL_table, |
| }, |
| { |
| .name = "VDCDC2", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table), |
| .table = DCDC_FIXED_1800000_VSEL_table, |
| }, |
| { |
| .name = "VDCDC3", |
| .table_len = ARRAY_SIZE(VCORE_VSEL_table), |
| .table = VCORE_VSEL_table, |
| }, |
| { |
| .name = "LDO1", |
| .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table), |
| .table = TPS65023_LDO1_VSEL_table, |
| }, |
| { |
| .name = "LDO2", |
| .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table), |
| .table = TPS65023_LDO2_VSEL_table, |
| }, |
| }; |
| |
| static const struct tps_info tps65023_regs[] = { |
| { |
| .name = "VDCDC1", |
| .table_len = ARRAY_SIZE(VCORE_VSEL_table), |
| .table = VCORE_VSEL_table, |
| }, |
| { |
| .name = "VDCDC2", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table), |
| .table = DCDC_FIXED_3300000_VSEL_table, |
| }, |
| { |
| .name = "VDCDC3", |
| .table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table), |
| .table = DCDC_FIXED_1800000_VSEL_table, |
| }, |
| { |
| .name = "LDO1", |
| .table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table), |
| .table = TPS65023_LDO1_VSEL_table, |
| }, |
| { |
| .name = "LDO2", |
| .table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table), |
| .table = TPS65023_LDO2_VSEL_table, |
| }, |
| }; |
| |
| static struct tps_driver_data tps65020_drv_data = { |
| .info = tps65020_regs, |
| .core_regulator = TPS65023_DCDC_3, |
| }; |
| |
| static struct tps_driver_data tps65021_drv_data = { |
| .info = tps65021_regs, |
| .core_regulator = TPS65023_DCDC_3, |
| }; |
| |
| static struct tps_driver_data tps65023_drv_data = { |
| .info = tps65023_regs, |
| .core_regulator = TPS65023_DCDC_1, |
| }; |
| |
| static const struct i2c_device_id tps_65023_id[] = { |
| {.name = "tps65023", |
| .driver_data = (unsigned long) &tps65023_drv_data}, |
| {.name = "tps65021", |
| .driver_data = (unsigned long) &tps65021_drv_data,}, |
| {.name = "tps65020", |
| .driver_data = (unsigned long) &tps65020_drv_data}, |
| { }, |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, tps_65023_id); |
| |
| static struct i2c_driver tps_65023_i2c_driver = { |
| .driver = { |
| .name = "tps65023", |
| .owner = THIS_MODULE, |
| }, |
| .probe = tps_65023_probe, |
| .remove = tps_65023_remove, |
| .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"); |