| /* |
| * 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 <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/regulator/tps6507x.h> |
| #include <linux/delay.h> |
| #include <linux/slab.h> |
| #include <linux/mfd/tps6507x.h> |
| |
| /* 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 milliVolts) */ |
| static const u16 VDCDCx_VSEL_table[] = { |
| 725, 750, 775, 800, |
| 825, 850, 875, 900, |
| 925, 950, 975, 1000, |
| 1025, 1050, 1075, 1100, |
| 1125, 1150, 1175, 1200, |
| 1225, 1250, 1275, 1300, |
| 1325, 1350, 1375, 1400, |
| 1425, 1450, 1475, 1500, |
| 1550, 1600, 1650, 1700, |
| 1750, 1800, 1850, 1900, |
| 1950, 2000, 2050, 2100, |
| 2150, 2200, 2250, 2300, |
| 2350, 2400, 2450, 2500, |
| 2550, 2600, 2650, 2700, |
| 2750, 2800, 2850, 2900, |
| 3000, 3100, 3200, 3300, |
| }; |
| |
| static const u16 LDO1_VSEL_table[] = { |
| 1000, 1100, 1200, 1250, |
| 1300, 1350, 1400, 1500, |
| 1600, 1800, 2500, 2750, |
| 2800, 3000, 3100, 3300, |
| }; |
| |
| static const u16 LDO2_VSEL_table[] = { |
| 725, 750, 775, 800, |
| 825, 850, 875, 900, |
| 925, 950, 975, 1000, |
| 1025, 1050, 1075, 1100, |
| 1125, 1150, 1175, 1200, |
| 1225, 1250, 1275, 1300, |
| 1325, 1350, 1375, 1400, |
| 1425, 1450, 1475, 1500, |
| 1550, 1600, 1650, 1700, |
| 1750, 1800, 1850, 1900, |
| 1950, 2000, 2050, 2100, |
| 2150, 2200, 2250, 2300, |
| 2350, 2400, 2450, 2500, |
| 2550, 2600, 2650, 2700, |
| 2750, 2800, 2850, 2900, |
| 3000, 3100, 3200, 3300, |
| }; |
| |
| struct tps_info { |
| const char *name; |
| unsigned min_uV; |
| unsigned max_uV; |
| u8 table_len; |
| const u16 *table; |
| |
| /* Does DCDC high or the low register defines output voltage? */ |
| bool defdcdc_default; |
| }; |
| |
| static struct tps_info tps6507x_pmic_regs[] = { |
| { |
| .name = "VDCDC1", |
| .min_uV = 725000, |
| .max_uV = 3300000, |
| .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), |
| .table = VDCDCx_VSEL_table, |
| }, |
| { |
| .name = "VDCDC2", |
| .min_uV = 725000, |
| .max_uV = 3300000, |
| .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), |
| .table = VDCDCx_VSEL_table, |
| }, |
| { |
| .name = "VDCDC3", |
| .min_uV = 725000, |
| .max_uV = 3300000, |
| .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), |
| .table = VDCDCx_VSEL_table, |
| }, |
| { |
| .name = "LDO1", |
| .min_uV = 1000000, |
| .max_uV = 3300000, |
| .table_len = ARRAY_SIZE(LDO1_VSEL_table), |
| .table = LDO1_VSEL_table, |
| }, |
| { |
| .name = "LDO2", |
| .min_uV = 725000, |
| .max_uV = 3300000, |
| .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<<shift) ? 1 : 0; |
| } |
| |
| static int tps6507x_pmic_enable(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_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(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 tps->info[rid]->table[data] * 1000; |
| } |
| |
| 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 int tps6507x_pmic_list_voltage(struct regulator_dev *dev, |
| unsigned selector) |
| { |
| struct tps6507x_pmic *tps = rdev_get_drvdata(dev); |
| int rid = rdev_get_id(dev); |
| |
| if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2) |
| return -EINVAL; |
| |
| if (selector >= tps->info[rid]->table_len) |
| return -EINVAL; |
| else |
| return tps->info[rid]->table[selector] * 1000; |
| } |
| |
| static struct regulator_ops tps6507x_pmic_ops = { |
| .is_enabled = tps6507x_pmic_is_enabled, |
| .enable = tps6507x_pmic_enable, |
| .disable = tps6507x_pmic_disable, |
| .get_voltage = tps6507x_pmic_get_voltage, |
| .set_voltage_sel = tps6507x_pmic_set_voltage_sel, |
| .list_voltage = tps6507x_pmic_list_voltage, |
| }; |
| |
| static __devinit 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; |
| int i; |
| int error; |
| |
| /** |
| * tps_board points to pmic related constants |
| * coming from the board-evm file. |
| */ |
| |
| tps_board = dev_get_platdata(tps6507x_dev->dev); |
| 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].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; |
| |
| rdev = regulator_register(&tps->desc[i], &config); |
| if (IS_ERR(rdev)) { |
| dev_err(tps6507x_dev->dev, |
| "failed to register %s regulator\n", |
| pdev->name); |
| error = PTR_ERR(rdev); |
| goto fail; |
| } |
| |
| /* Save regulator for cleanup */ |
| tps->rdev[i] = rdev; |
| } |
| |
| tps6507x_dev->pmic = tps; |
| platform_set_drvdata(pdev, tps6507x_dev); |
| |
| return 0; |
| |
| fail: |
| while (--i >= 0) |
| regulator_unregister(tps->rdev[i]); |
| return error; |
| } |
| |
| static int __devexit tps6507x_pmic_remove(struct platform_device *pdev) |
| { |
| struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev); |
| struct tps6507x_pmic *tps = tps6507x_dev->pmic; |
| int i; |
| |
| for (i = 0; i < TPS6507X_NUM_REGULATOR; i++) |
| regulator_unregister(tps->rdev[i]); |
| return 0; |
| } |
| |
| static struct platform_driver tps6507x_pmic_driver = { |
| .driver = { |
| .name = "tps6507x-pmic", |
| .owner = THIS_MODULE, |
| }, |
| .probe = tps6507x_pmic_probe, |
| .remove = __devexit_p(tps6507x_pmic_remove), |
| }; |
| |
| 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"); |