/* * 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 #include #include #include #include #include #include #include #include #include /* 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_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, }; /* 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 ret; int data, dcdc = rdev_get_id(dev); if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) return -EINVAL; if (dcdc == tps->core_regulator) { ret = regmap_read(tps->regmap, TPS65023_REG_DEF_CORE, &data); if (ret != 0) return ret; data &= (tps->info[dcdc]->table_len - 1); return data; } else return 0; } 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); int ret; if (dcdc != tps->core_regulator) return -EINVAL; ret = regmap_write(tps->regmap, TPS65023_REG_DEF_CORE, selector); if (ret) goto out; /* Tell the chip that we have changed the value in DEFCORE * and its time to update the core voltage */ ret = regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2, TPS65023_REG_CTRL2_GO, TPS65023_REG_CTRL2_GO); out: return ret; } /* 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); } 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_LDO_VSEL_table), .table = TPS65020_LDO_VSEL_table, }, { .name = "LDO2", .table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table), .table = TPS65020_LDO_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");