/* * tps6507x-regulator.c * * Regulator driver for TPS65073 PMIC * * 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 #include #include /* DCDC's */ #define TPS6507X_DCDC_1 0 #define TPS6507X_DCDC_2 1 #define TPS6507X_DCDC_3 2 /* LDOs */ #define TPS6507X_LDO_1 3 #define TPS6507X_LDO_2 4 #define TPS6507X_MAX_REG_ID TPS6507X_LDO_2 /* Number of step-down converters available */ #define TPS6507X_NUM_DCDC 3 /* Number of LDO voltage regulators available */ #define TPS6507X_NUM_LDO 2 /* Number of total regulators available */ #define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO) /* Supported voltage values for regulators (in microVolts) */ static const unsigned int VDCDCx_VSEL_table[] = { 725000, 750000, 775000, 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, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000, 1900000, 1950000, 2000000, 2050000, 2100000, 2150000, 2200000, 2250000, 2300000, 2350000, 2400000, 2450000, 2500000, 2550000, 2600000, 2650000, 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3200000, 3300000, }; static const unsigned int LDO1_VSEL_table[] = { 1000000, 1100000, 1200000, 1250000, 1300000, 1350000, 1400000, 1500000, 1600000, 1800000, 2500000, 2750000, 2800000, 3000000, 3100000, 3300000, }; /* The voltage mapping table for LDO2 is the same as VDCDCx */ #define LDO2_VSEL_table VDCDCx_VSEL_table struct tps_info { const char *name; u8 table_len; const unsigned int *table; /* Does DCDC high or the low register defines output voltage? */ bool defdcdc_default; }; static struct tps_info tps6507x_pmic_regs[] = { { .name = "VDCDC1", .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "VDCDC2", .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "VDCDC3", .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "LDO1", .table_len = ARRAY_SIZE(LDO1_VSEL_table), .table = LDO1_VSEL_table, }, { .name = "LDO2", .table_len = ARRAY_SIZE(LDO2_VSEL_table), .table = LDO2_VSEL_table, }, }; struct tps6507x_pmic { struct regulator_desc desc[TPS6507X_NUM_REGULATOR]; struct tps6507x_dev *mfd; struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR]; struct tps_info *info[TPS6507X_NUM_REGULATOR]; struct mutex io_lock; }; static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg) { u8 val; int err; err = tps->mfd->read_dev(tps->mfd, reg, 1, &val); if (err) return err; return val; } static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val) { return tps->mfd->write_dev(tps->mfd, reg, 1, &val); } static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps6507x_pmic_read(tps, reg); if (data < 0) { dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); err = data; goto out; } data |= mask; err = tps6507x_pmic_write(tps, reg, data); if (err) dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg); out: mutex_unlock(&tps->io_lock); return err; } static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps6507x_pmic_read(tps, reg); if (data < 0) { dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); err = data; goto out; } data &= ~mask; err = tps6507x_pmic_write(tps, reg, data); if (err) dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg); out: mutex_unlock(&tps->io_lock); return err; } static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg) { int data; mutex_lock(&tps->io_lock); data = tps6507x_pmic_read(tps, reg); if (data < 0) dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg); mutex_unlock(&tps->io_lock); return data; } static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val) { int err; mutex_lock(&tps->io_lock); err = tps6507x_pmic_write(tps, reg, val); if (err < 0) dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg); mutex_unlock(&tps->io_lock); return err; } static int tps6507x_pmic_is_enabled(struct regulator_dev *dev) { struct tps6507x_pmic *tps = rdev_get_drvdata(dev); int data, rid = rdev_get_id(dev); u8 shift; if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - rid; data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1); if (data < 0) return data; else return (data & 1< TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - rid; return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_pmic_disable(struct regulator_dev *dev) { struct tps6507x_pmic *tps = rdev_get_drvdata(dev); int rid = rdev_get_id(dev); u8 shift; if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - rid; return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev) { struct tps6507x_pmic *tps = rdev_get_drvdata(dev); int data, rid = rdev_get_id(dev); u8 reg, mask; switch (rid) { case TPS6507X_DCDC_1: reg = TPS6507X_REG_DEFDCDC1; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_DCDC_2: if (tps->info[rid]->defdcdc_default) reg = TPS6507X_REG_DEFDCDC2_HIGH; else reg = TPS6507X_REG_DEFDCDC2_LOW; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_DCDC_3: if (tps->info[rid]->defdcdc_default) reg = TPS6507X_REG_DEFDCDC3_HIGH; else reg = TPS6507X_REG_DEFDCDC3_LOW; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_LDO_1: reg = TPS6507X_REG_LDO_CTRL1; mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK; break; case TPS6507X_LDO_2: reg = TPS6507X_REG_DEFLDO2; mask = TPS6507X_REG_DEFLDO2_LDO2_MASK; break; default: return -EINVAL; } data = tps6507x_pmic_reg_read(tps, reg); if (data < 0) return data; data &= mask; return data; } static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev, unsigned selector) { struct tps6507x_pmic *tps = rdev_get_drvdata(dev); int data, rid = rdev_get_id(dev); u8 reg, mask; switch (rid) { case TPS6507X_DCDC_1: reg = TPS6507X_REG_DEFDCDC1; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_DCDC_2: if (tps->info[rid]->defdcdc_default) reg = TPS6507X_REG_DEFDCDC2_HIGH; else reg = TPS6507X_REG_DEFDCDC2_LOW; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_DCDC_3: if (tps->info[rid]->defdcdc_default) reg = TPS6507X_REG_DEFDCDC3_HIGH; else reg = TPS6507X_REG_DEFDCDC3_LOW; mask = TPS6507X_DEFDCDCX_DCDC_MASK; break; case TPS6507X_LDO_1: reg = TPS6507X_REG_LDO_CTRL1; mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK; break; case TPS6507X_LDO_2: reg = TPS6507X_REG_DEFLDO2; mask = TPS6507X_REG_DEFLDO2_LDO2_MASK; break; default: return -EINVAL; } data = tps6507x_pmic_reg_read(tps, reg); if (data < 0) return data; data &= ~mask; data |= selector; return tps6507x_pmic_reg_write(tps, reg, data); } static struct regulator_ops tps6507x_pmic_ops = { .is_enabled = tps6507x_pmic_is_enabled, .enable = tps6507x_pmic_enable, .disable = tps6507x_pmic_disable, .get_voltage_sel = tps6507x_pmic_get_voltage_sel, .set_voltage_sel = tps6507x_pmic_set_voltage_sel, .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, }; static struct of_regulator_match tps6507x_matches[] = { { .name = "VDCDC1"}, { .name = "VDCDC2"}, { .name = "VDCDC3"}, { .name = "LDO1"}, { .name = "LDO2"}, }; static struct tps6507x_board *tps6507x_parse_dt_reg_data( struct platform_device *pdev, struct of_regulator_match **tps6507x_reg_matches) { struct tps6507x_board *tps_board; struct device_node *np = pdev->dev.parent->of_node; struct device_node *regulators; struct of_regulator_match *matches; static struct regulator_init_data *reg_data; int idx = 0, count, ret; tps_board = devm_kzalloc(&pdev->dev, sizeof(*tps_board), GFP_KERNEL); if (!tps_board) return NULL; regulators = of_get_child_by_name(np, "regulators"); if (!regulators) { dev_err(&pdev->dev, "regulator node not found\n"); return NULL; } count = ARRAY_SIZE(tps6507x_matches); matches = tps6507x_matches; ret = of_regulator_match(&pdev->dev, regulators, matches, count); of_node_put(regulators); if (ret < 0) { dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret); return NULL; } *tps6507x_reg_matches = matches; reg_data = devm_kzalloc(&pdev->dev, (sizeof(struct regulator_init_data) * TPS6507X_NUM_REGULATOR), GFP_KERNEL); if (!reg_data) return NULL; tps_board->tps6507x_pmic_init_data = reg_data; for (idx = 0; idx < count; idx++) { if (!matches[idx].init_data || !matches[idx].of_node) continue; memcpy(®_data[idx], matches[idx].init_data, sizeof(struct regulator_init_data)); } return tps_board; } static int tps6507x_pmic_probe(struct platform_device *pdev) { struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent); struct tps_info *info = &tps6507x_pmic_regs[0]; struct regulator_config config = { }; struct regulator_init_data *init_data; struct regulator_dev *rdev; struct tps6507x_pmic *tps; struct tps6507x_board *tps_board; struct of_regulator_match *tps6507x_reg_matches = NULL; int i; int error; unsigned int prop; /** * tps_board points to pmic related constants * coming from the board-evm file. */ tps_board = dev_get_platdata(tps6507x_dev->dev); if (IS_ENABLED(CONFIG_OF) && !tps_board && tps6507x_dev->dev->of_node) tps_board = tps6507x_parse_dt_reg_data(pdev, &tps6507x_reg_matches); if (!tps_board) return -EINVAL; /** * init_data points to array of regulator_init structures * coming from the board-evm file. */ init_data = tps_board->tps6507x_pmic_init_data; if (!init_data) return -EINVAL; tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL); if (!tps) return -ENOMEM; mutex_init(&tps->io_lock); /* common for all regulators */ tps->mfd = tps6507x_dev; for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) { /* Register the regulators */ tps->info[i] = info; if (init_data->driver_data) { struct tps6507x_reg_platform_data *data = init_data->driver_data; tps->info[i]->defdcdc_default = data->defdcdc_default; } 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 = &tps6507x_pmic_ops; tps->desc[i].type = REGULATOR_VOLTAGE; tps->desc[i].owner = THIS_MODULE; config.dev = tps6507x_dev->dev; config.init_data = init_data; config.driver_data = tps; if (tps6507x_reg_matches) { error = of_property_read_u32( tps6507x_reg_matches[i].of_node, "ti,defdcdc_default", &prop); if (!error) tps->info[i]->defdcdc_default = prop; config.of_node = tps6507x_reg_matches[i].of_node; } rdev = devm_regulator_register(&pdev->dev, &tps->desc[i], &config); if (IS_ERR(rdev)) { dev_err(tps6507x_dev->dev, "failed to register %s regulator\n", pdev->name); return PTR_ERR(rdev); } /* Save regulator for cleanup */ tps->rdev[i] = rdev; } tps6507x_dev->pmic = tps; platform_set_drvdata(pdev, tps6507x_dev); return 0; } static struct platform_driver tps6507x_pmic_driver = { .driver = { .name = "tps6507x-pmic", }, .probe = tps6507x_pmic_probe, }; static int __init tps6507x_pmic_init(void) { return platform_driver_register(&tps6507x_pmic_driver); } subsys_initcall(tps6507x_pmic_init); static void __exit tps6507x_pmic_cleanup(void) { platform_driver_unregister(&tps6507x_pmic_driver); } module_exit(tps6507x_pmic_cleanup); MODULE_AUTHOR("Texas Instruments"); MODULE_DESCRIPTION("TPS6507x voltage regulator driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:tps6507x-pmic");