On Fri, Aug 07, 2009 at 05:26:06PM +0200, ext Anuj Aggarwal wrote: > Adding support for TI TPS6507x regulator driver > > Signed-off-by: Anuj Aggarwal <anuj.aggarwal@xxxxxx> > --- > drivers/regulator/tps6507x-regulator.c | 563 ++++++++++++++++++++++++++++++++ > 1 files changed, 563 insertions(+), 0 deletions(-) > create mode 100644 drivers/regulator/tps6507x-regulator.c > > diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c > new file mode 100644 > index 0000000..c5e319c > --- /dev/null > +++ b/drivers/regulator/tps6507x-regulator.c > @@ -0,0 +1,563 @@ > +/* > + * 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/mfd/tps6507x.h> > +#include <linux/i2c.h> > +#include <linux/delay.h> > + > +struct tps_info { > + const char *name; > + unsigned min_uV; > + unsigned max_uV; > + bool fixed; > + 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]; > + struct tps_info *info[TPS6507X_NUM_REGULATOR]; > +}; > + > +static inline int tps_6507x_read_reg(struct tps_pmic *tps, u8 reg, u8 *val) > +{ > + int status; > + > + status = i2c_smbus_read_byte_data(tps->client, reg); > + *val = status; > + if (status < 0) > + return status; > + return 0; same comments as previous patch. > +} > + > +static inline int tps_6507x_write_reg(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) > +{ > + u8 data; > + int err; > + > + err = tps_6507x_read_reg(tps, reg, &data); > + if (err) { > + pr_err("Read from reg 0x%x failed\n", reg); > + return err; > + } > + > + data |= mask; > + > + return tps_6507x_write_reg(tps, reg, data); > +} > + > +static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask) > +{ > + u8 data; > + int err; > + > + err = tps_6507x_read_reg(tps, reg, &data); > + if (err) { > + pr_err("Read from reg 0x%x failed\n", reg); > + return err; > + } > + > + data &= ~mask; > + > + return tps_6507x_write_reg(tps, reg, data); > +} > + > +static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev) > +{ > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int dcdc = rdev_get_id(dev); > + int ret; > + u8 shift; > + unsigned char reg_ctrl; > + > + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) > + return -EINVAL; > + > + shift = TPS6507X_MAX_REG_ID - dcdc; > + ret = tps_6507x_read_reg(tps, TPS6507X_REG_CON_CTRL1, ®_ctrl); > + > + if (ret == 0) { > + reg_ctrl &= (1 << shift); > + return reg_ctrl ? 1 : 0; > + } else > + return ret; > +} > + > +static int tps6507x_ldo_is_enabled(struct regulator_dev *dev) > +{ > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int ldo = rdev_get_id(dev); > + int ret; > + u8 shift; > + unsigned char reg_ctrl; > + > + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) > + return -EINVAL; > + > + shift = TPS6507X_MAX_REG_ID - ldo; > + ret = tps_6507x_read_reg(tps, TPS6507X_REG_CON_CTRL1, ®_ctrl); > + > + if (ret == 0) { > + reg_ctrl &= (1 << shift); > + return reg_ctrl ? 1 : 0; > + } else > + return ret; > +} > + > +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) > +{ > + unsigned char reg_ctrl; > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int dcdc = rdev_get_id(dev); > + u8 reg; > + int ret; > + > + 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; > + } > + > + ret = tps_6507x_read_reg(tps, reg, ®_ctrl); > + if (ret < 0) > + return ret; > + > + reg_ctrl &= TPS6507X_DEFDCDCX_DCDC_MASK; > + return tps->info[dcdc]->table[reg_ctrl] * 1000; > +} > + > +static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev, > + int min_uV, int max_uV) > +{ > + unsigned char reg_ctrl; > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int dcdc = rdev_get_id(dev); > + u8 reg; > + int vsel, ret; > + > + 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; > + } > + > + ret = tps_6507x_read_reg(tps, reg, ®_ctrl); > + if (ret < 0) > + return ret; > + > + reg_ctrl &= ~TPS6507X_DEFDCDCX_DCDC_MASK; > + reg_ctrl |= vsel; > + > + return tps_6507x_write_reg(tps, reg, reg_ctrl); > +} > + > +static int tps6507x_ldo_get_voltage(struct regulator_dev *dev) > +{ > + unsigned char reg_ctrl; > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int ldo = rdev_get_id(dev); > + u8 reg, mask; > + int ret; > + > + 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); > + } > + > + ret = tps_6507x_read_reg(tps, reg, ®_ctrl); > + if (ret < 0) > + return ret; > + > + reg_ctrl &= mask; > + return tps->info[ldo]->table[reg_ctrl] * 1000; > +} > + > +static int tps6507x_ldo_set_voltage(struct regulator_dev *dev, > + int min_uV, int max_uV) > +{ > + unsigned char reg_ctrl; > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int ldo = rdev_get_id(dev); > + u8 reg, mask; > + int vsel, ret; > + > + 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; > + } > + > + ret = tps_6507x_read_reg(tps, reg, ®_ctrl); > + if (ret < 0) > + return ret; > + > + reg_ctrl &= ~mask; > + reg_ctrl |= vsel; > + > + return tps_6507x_write_reg(tps, reg, reg_ctrl); > +} > + > +/* 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, > +}; > + > +/* 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, > +}; > + > +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; > + > + /* 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].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); > + 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; > +} > + > +/* 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 const struct tps_info tps6507x_regs[] = { > + { > + .name = "VDCDC1", > + .min_uV = 725000, > + .max_uV = 3300000, > + .fixed = 0, > + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), > + .table = VDCDCx_VSEL_table, > + }, > + { > + .name = "VDCDC2", > + .min_uV = 725000, > + .max_uV = 3300000, > + .fixed = 0, > + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), > + .table = VDCDCx_VSEL_table, > + }, > + { > + .name = "VDCDC3", > + .min_uV = 725000, > + .max_uV = 3300000, > + .fixed = 0, > + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), > + .table = VDCDCx_VSEL_table, > + }, > + { > + .name = "LDO1", > + .min_uV = 1000000, > + .max_uV = 3300000, > + .fixed = 0, > + .table_len = ARRAY_SIZE(LDO1_VSEL_table), > + .table = LDO1_VSEL_table, > + }, > + { > + .name = "LDO2", > + .min_uV = 725000, > + .max_uV = 3300000, > + .fixed = 0, > + .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 = "tps_6507x_pwr", > + .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"); > -- > 1.6.2.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- balbi -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
