diff options
Diffstat (limited to 'kernel/drivers/regulator/tps6507x-regulator.c')
| -rw-r--r-- | kernel/drivers/regulator/tps6507x-regulator.c | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/kernel/drivers/regulator/tps6507x-regulator.c b/kernel/drivers/regulator/tps6507x-regulator.c new file mode 100644 index 000000000..dad0bac09 --- /dev/null +++ b/kernel/drivers/regulator/tps6507x-regulator.c @@ -0,0 +1,541 @@ +/* + * 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/of.h> +#include <linux/slab.h> +#include <linux/mfd/tps6507x.h> +#include <linux/regulator/of_regulator.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 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<<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_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"); |