diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/regulator/tps6507x-regulator.c | 713 |
1 files changed, 713 insertions, 0 deletions
diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c new file mode 100644 index 0000000..1aa3636 --- /dev/null +++ b/drivers/regulator/tps6507x-regulator.c @@ -0,0 +1,713 @@ +/* + * 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/i2c.h> +#include <linux/delay.h> + +/* Register definitions */ +#define TPS6507X_REG_PPATH1 0X01 +#define TPS6507X_REG_INT 0X02 +#define TPS6507X_REG_CHGCONFIG0 0X03 +#define TPS6507X_REG_CHGCONFIG1 0X04 +#define TPS6507X_REG_CHGCONFIG2 0X05 +#define TPS6507X_REG_CHGCONFIG3 0X06 +#define TPS6507X_REG_REG_ADCONFIG 0X07 +#define TPS6507X_REG_TSCMODE 0X08 +#define TPS6507X_REG_ADRESULT_1 0X09 +#define TPS6507X_REG_ADRESULT_2 0X0A +#define TPS6507X_REG_PGOOD 0X0B +#define TPS6507X_REG_PGOODMASK 0X0C +#define TPS6507X_REG_CON_CTRL1 0X0D +#define TPS6507X_REG_CON_CTRL2 0X0E +#define TPS6507X_REG_CON_CTRL3 0X0F +#define TPS6507X_REG_DEFDCDC1 0X10 +#define TPS6507X_REG_DEFDCDC2_LOW 0X11 +#define TPS6507X_REG_DEFDCDC2_HIGH 0X12 +#define TPS6507X_REG_DEFDCDC3_LOW 0X13 +#define TPS6507X_REG_DEFDCDC3_HIGH 0X14 +#define TPS6507X_REG_DEFSLEW 0X15 +#define TPS6507X_REG_LDO_CTRL1 0X16 +#define TPS6507X_REG_DEFLDO2 0X17 +#define TPS6507X_REG_WLED_CTRL1 0X18 +#define TPS6507X_REG_WLED_CTRL2 0X19 + +/* CON_CTRL1 bitfields */ +#define TPS6507X_CON_CTRL1_DCDC1_ENABLE BIT(4) +#define TPS6507X_CON_CTRL1_DCDC2_ENABLE BIT(3) +#define TPS6507X_CON_CTRL1_DCDC3_ENABLE BIT(2) +#define TPS6507X_CON_CTRL1_LDO1_ENABLE BIT(1) +#define TPS6507X_CON_CTRL1_LDO2_ENABLE BIT(0) + +/* DEFDCDC1 bitfields */ +#define TPS6507X_DEFDCDC1_DCDC1_EXT_ADJ_EN BIT(7) +#define TPS6507X_DEFDCDC1_DCDC1_MASK 0X3F + +/* DEFDCDC2_LOW bitfields */ +#define TPS6507X_DEFDCDC2_LOW_DCDC2_MASK 0X3F + +/* DEFDCDC2_HIGH bitfields */ +#define TPS6507X_DEFDCDC2_HIGH_DCDC2_MASK 0X3F + +/* DEFDCDC3_LOW bitfields */ +#define TPS6507X_DEFDCDC3_LOW_DCDC3_MASK 0X3F + +/* DEFDCDC3_HIGH bitfields */ +#define TPS6507X_DEFDCDC3_HIGH_DCDC3_MASK 0X3F + +/* TPS6507X_REG_LDO_CTRL1 bitfields */ +#define TPS6507X_REG_LDO_CTRL1_LDO1_MASK 0X0F + +/* TPS6507X_REG_DEFLDO2 bitfields */ +#define TPS6507X_REG_DEFLDO2_LDO2_MASK 0X3F + +/* VDCDC MASK */ +#define TPS6507X_DEFDCDCX_DCDC_MASK 0X3F + +/* 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, +}; + +static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table), + ARRAY_SIZE(VDCDCx_VSEL_table), + ARRAY_SIZE(VDCDCx_VSEL_table), + ARRAY_SIZE(LDO1_VSEL_table), + ARRAY_SIZE(LDO2_VSEL_table)}; + +struct tps_info { + const char *name; + unsigned min_uV; + unsigned max_uV; + u8 table_len; + const u16 *table; +}; + +struct tps_pmic { + struct regulator_desc desc[TPS6507X_NUM_REGULATOR]; + struct i2c_client *client; + struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR]; + const struct tps_info *info[TPS6507X_NUM_REGULATOR]; + struct mutex io_lock; +}; + +static inline int tps_6507x_read(struct tps_pmic *tps, u8 reg) +{ + return i2c_smbus_read_byte_data(tps->client, reg); +} + +static inline int tps_6507x_write(struct tps_pmic *tps, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(tps->client, reg, val); +} + +static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask) +{ + int err, data; + + mutex_lock(&tps->io_lock); + + data = tps_6507x_read(tps, reg); + if (data < 0) { + dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); + err = data; + goto out; + } + + data |= mask; + err = tps_6507x_write(tps, reg, data); + if (err) + dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); + +out: + mutex_unlock(&tps->io_lock); + return err; +} + +static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask) +{ + int err, data; + + mutex_lock(&tps->io_lock); + + data = tps_6507x_read(tps, reg); + if (data < 0) { + dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); + err = data; + goto out; + } + + data &= ~mask; + err = tps_6507x_write(tps, reg, data); + if (err) + dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); + +out: + mutex_unlock(&tps->io_lock); + return err; +} + +static int tps_6507x_reg_read(struct tps_pmic *tps, u8 reg) +{ + int data; + + mutex_lock(&tps->io_lock); + + data = tps_6507x_read(tps, reg); + if (data < 0) + dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); + + mutex_unlock(&tps->io_lock); + return data; +} + +static int tps_6507x_reg_write(struct tps_pmic *tps, u8 reg, u8 val) +{ + int err; + + mutex_lock(&tps->io_lock); + + err = tps_6507x_write(tps, reg, val); + if (err < 0) + dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); + + mutex_unlock(&tps->io_lock); + return err; +} + +static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, dcdc = rdev_get_id(dev); + u8 shift; + + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - dcdc; + data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1); + + if (data < 0) + return data; + else + return (data & 1<<shift) ? 1 : 0; +} + +static int tps6507x_ldo_is_enabled(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, ldo = rdev_get_id(dev); + u8 shift; + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - ldo; + data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1); + + if (data < 0) + return data; + else + return (data & 1<<shift) ? 1 : 0; +} + +static int tps6507x_dcdc_enable(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int dcdc = rdev_get_id(dev); + u8 shift; + + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - dcdc; + return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); +} + +static int tps6507x_dcdc_disable(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int dcdc = rdev_get_id(dev); + u8 shift; + + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - dcdc; + return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); +} + +static int tps6507x_ldo_enable(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int ldo = rdev_get_id(dev); + u8 shift; + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - ldo; + return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); +} + +static int tps6507x_ldo_disable(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int ldo = rdev_get_id(dev); + u8 shift; + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + + shift = TPS6507X_MAX_REG_ID - ldo; + return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); +} + +static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, dcdc = rdev_get_id(dev); + u8 reg; + + switch (dcdc) { + case TPS6507X_DCDC_1: + reg = TPS6507X_REG_DEFDCDC1; + break; + case TPS6507X_DCDC_2: + reg = TPS6507X_REG_DEFDCDC2_LOW; + break; + case TPS6507X_DCDC_3: + reg = TPS6507X_REG_DEFDCDC3_LOW; + break; + default: + return -EINVAL; + } + + data = tps_6507x_reg_read(tps, reg); + if (data < 0) + return data; + + data &= TPS6507X_DEFDCDCX_DCDC_MASK; + return tps->info[dcdc]->table[data] * 1000; +} + +static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev, + int min_uV, int max_uV) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, vsel, dcdc = rdev_get_id(dev); + u8 reg; + + switch (dcdc) { + case TPS6507X_DCDC_1: + reg = TPS6507X_REG_DEFDCDC1; + break; + case TPS6507X_DCDC_2: + reg = TPS6507X_REG_DEFDCDC2_LOW; + break; + case TPS6507X_DCDC_3: + reg = TPS6507X_REG_DEFDCDC3_LOW; + break; + default: + return -EINVAL; + } + + if (min_uV < tps->info[dcdc]->min_uV + || min_uV > tps->info[dcdc]->max_uV) + return -EINVAL; + if (max_uV < tps->info[dcdc]->min_uV + || max_uV > tps->info[dcdc]->max_uV) + return -EINVAL; + + for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) { + int mV = tps->info[dcdc]->table[vsel]; + int uV = mV * 1000; + + /* Break at the first in-range value */ + if (min_uV <= uV && uV <= max_uV) + break; + } + + /* write to the register in case we found a match */ + if (vsel == tps->info[dcdc]->table_len) + return -EINVAL; + + data = tps_6507x_reg_read(tps, reg); + if (data < 0) + return data; + + data &= ~TPS6507X_DEFDCDCX_DCDC_MASK; + data |= vsel; + + return tps_6507x_reg_write(tps, reg, data); +} + +static int tps6507x_ldo_get_voltage(struct regulator_dev *dev) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, ldo = rdev_get_id(dev); + u8 reg, mask; + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + else { + reg = (ldo == TPS6507X_LDO_1 ? + TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2); + mask = (ldo == TPS6507X_LDO_1 ? + TPS6507X_REG_LDO_CTRL1_LDO1_MASK : + TPS6507X_REG_DEFLDO2_LDO2_MASK); + } + + data = tps_6507x_reg_read(tps, reg); + if (data < 0) + return data; + + data &= mask; + return tps->info[ldo]->table[data] * 1000; +} + +static int tps6507x_ldo_set_voltage(struct regulator_dev *dev, + int min_uV, int max_uV) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int data, vsel, ldo = rdev_get_id(dev); + u8 reg, mask; + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + else { + reg = (ldo == TPS6507X_LDO_1 ? + TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2); + mask = (ldo == TPS6507X_LDO_1 ? + TPS6507X_REG_LDO_CTRL1_LDO1_MASK : + TPS6507X_REG_DEFLDO2_LDO2_MASK); + } + + if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV) + return -EINVAL; + if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV) + return -EINVAL; + + for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) { + int mV = tps->info[ldo]->table[vsel]; + int uV = mV * 1000; + + /* Break at the first in-range value */ + if (min_uV <= uV && uV <= max_uV) + break; + } + + if (vsel == tps->info[ldo]->table_len) + return -EINVAL; + + data = tps_6507x_reg_read(tps, reg); + if (data < 0) + return data; + + data &= ~mask; + data |= vsel; + + return tps_6507x_reg_write(tps, reg, data); +} + +static int tps6507x_dcdc_list_voltage(struct regulator_dev *dev, + unsigned selector) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int dcdc = rdev_get_id(dev); + + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) + return -EINVAL; + + if (selector >= tps->info[dcdc]->table_len) + return -EINVAL; + else + return tps->info[dcdc]->table[selector] * 1000; +} + +static int tps6507x_ldo_list_voltage(struct regulator_dev *dev, + unsigned selector) +{ + struct tps_pmic *tps = rdev_get_drvdata(dev); + int ldo = rdev_get_id(dev); + + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) + return -EINVAL; + + if (selector >= tps->info[ldo]->table_len) + return -EINVAL; + else + return tps->info[ldo]->table[selector] * 1000; +} + +/* Operations permitted on VDCDCx */ +static struct regulator_ops tps6507x_dcdc_ops = { + .is_enabled = tps6507x_dcdc_is_enabled, + .enable = tps6507x_dcdc_enable, + .disable = tps6507x_dcdc_disable, + .get_voltage = tps6507x_dcdc_get_voltage, + .set_voltage = tps6507x_dcdc_set_voltage, + .list_voltage = tps6507x_dcdc_list_voltage, +}; + +/* Operations permitted on LDOx */ +static struct regulator_ops tps6507x_ldo_ops = { + .is_enabled = tps6507x_ldo_is_enabled, + .enable = tps6507x_ldo_enable, + .disable = tps6507x_ldo_disable, + .get_voltage = tps6507x_ldo_get_voltage, + .set_voltage = tps6507x_ldo_set_voltage, + .list_voltage = tps6507x_ldo_list_voltage, +}; + +static +int tps_6507x_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + static int desc_id; + const struct tps_info *info = (void *)id->driver_data; + struct regulator_init_data *init_data; + struct regulator_dev *rdev; + struct tps_pmic *tps; + int i; + + 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 = kzalloc(sizeof(*tps), GFP_KERNEL); + if (!tps) + return -ENOMEM; + + mutex_init(&tps->io_lock); + + /* common for all regulators */ + tps->client = client; + + for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) { + /* Register the regulators */ + tps->info[i] = info; + tps->desc[i].name = info->name; + tps->desc[i].id = desc_id++; + tps->desc[i].n_voltages = num_voltages[i]; + tps->desc[i].ops = (i > TPS6507X_DCDC_3 ? + &tps6507x_ldo_ops : &tps6507x_dcdc_ops); + tps->desc[i].type = REGULATOR_VOLTAGE; + tps->desc[i].owner = THIS_MODULE; + + rdev = regulator_register(&tps->desc[i], + &client->dev, init_data, tps); + if (IS_ERR(rdev)) { + dev_err(&client->dev, "failed to register %s\n", + id->name); + + /* Unregister */ + while (i) + regulator_unregister(tps->rdev[--i]); + + tps->client = NULL; + + /* clear the client data in i2c */ + i2c_set_clientdata(client, NULL); + + kfree(tps); + return PTR_ERR(rdev); + } + + /* Save regulator for cleanup */ + tps->rdev[i] = rdev; + } + + i2c_set_clientdata(client, tps); + + return 0; +} + +/** + * tps_6507x_remove - TPS6507x driver i2c remove handler + * @client: i2c driver client device structure + * + * Unregister TPS driver as an i2c client device driver + */ +static int __devexit tps_6507x_remove(struct i2c_client *client) +{ + struct tps_pmic *tps = i2c_get_clientdata(client); + int i; + + for (i = 0; i < TPS6507X_NUM_REGULATOR; i++) + regulator_unregister(tps->rdev[i]); + + tps->client = NULL; + + /* clear the client data in i2c */ + i2c_set_clientdata(client, NULL); + kfree(tps); + + return 0; +} + +static const struct tps_info tps6507x_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, + }, +}; + +static const struct i2c_device_id tps_6507x_id = { + .name = "tps6507x", + .driver_data = (unsigned long) &tps6507x_regs[0], +}; +MODULE_DEVICE_TABLE(i2c, tps_6507x_id); + +static struct i2c_driver tps_6507x_i2c_driver = { + .driver = { + .name = "tps6507x", + .owner = THIS_MODULE, + }, + .probe = tps_6507x_probe, + .remove = __devexit_p(tps_6507x_remove), + .id_table = &tps_6507x_id, +}; + +/** + * tps_6507x_init + * + * Module init function + */ +static int __init tps_6507x_init(void) +{ + return i2c_add_driver(&tps_6507x_i2c_driver); +} +subsys_initcall(tps_6507x_init); + +/** + * tps_6507x_cleanup + * + * Module exit function + */ +static void __exit tps_6507x_cleanup(void) +{ + i2c_del_driver(&tps_6507x_i2c_driver); +} +module_exit(tps_6507x_cleanup); + +MODULE_AUTHOR("Texas Instruments"); +MODULE_DESCRIPTION("TPS6507x voltage regulator driver"); +MODULE_LICENSE("GPLv2"); |