12edd3b69SLinus Walleij /* 22edd3b69SLinus Walleij * Driver for TPS61050/61052 boost converters, typically used for white LEDs 32edd3b69SLinus Walleij * or audio amplifiers. 42edd3b69SLinus Walleij * 52edd3b69SLinus Walleij * Copyright (C) 2011 ST-Ericsson SA 62edd3b69SLinus Walleij * Written on behalf of Linaro for ST-Ericsson 72edd3b69SLinus Walleij * 82edd3b69SLinus Walleij * Author: Linus Walleij <linus.walleij@linaro.org> 92edd3b69SLinus Walleij * 102edd3b69SLinus Walleij * License terms: GNU General Public License (GPL) version 2 112edd3b69SLinus Walleij */ 122edd3b69SLinus Walleij 132edd3b69SLinus Walleij #include <linux/module.h> 142edd3b69SLinus Walleij #include <linux/kernel.h> 152edd3b69SLinus Walleij #include <linux/init.h> 162edd3b69SLinus Walleij #include <linux/err.h> 172edd3b69SLinus Walleij #include <linux/i2c.h> 182edd3b69SLinus Walleij #include <linux/platform_device.h> 192edd3b69SLinus Walleij #include <linux/regulator/driver.h> 202edd3b69SLinus Walleij #include <linux/mfd/core.h> 212edd3b69SLinus Walleij #include <linux/mfd/tps6105x.h> 222edd3b69SLinus Walleij 23c55979b7SAxel Lin static const unsigned int tps6105x_voltages[] = { 242edd3b69SLinus Walleij 4500000, 252edd3b69SLinus Walleij 5000000, 262edd3b69SLinus Walleij 5250000, 272edd3b69SLinus Walleij 5000000, /* There is an additional 5V */ 282edd3b69SLinus Walleij }; 292edd3b69SLinus Walleij 302edd3b69SLinus Walleij static int tps6105x_regulator_enable(struct regulator_dev *rdev) 312edd3b69SLinus Walleij { 322edd3b69SLinus Walleij struct tps6105x *tps6105x = rdev_get_drvdata(rdev); 332edd3b69SLinus Walleij int ret; 342edd3b69SLinus Walleij 352edd3b69SLinus Walleij /* Activate voltage mode */ 362edd3b69SLinus Walleij ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0, 372edd3b69SLinus Walleij TPS6105X_REG0_MODE_MASK, 382edd3b69SLinus Walleij TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT); 392edd3b69SLinus Walleij if (ret) 402edd3b69SLinus Walleij return ret; 412edd3b69SLinus Walleij 422edd3b69SLinus Walleij return 0; 432edd3b69SLinus Walleij } 442edd3b69SLinus Walleij 452edd3b69SLinus Walleij static int tps6105x_regulator_disable(struct regulator_dev *rdev) 462edd3b69SLinus Walleij { 472edd3b69SLinus Walleij struct tps6105x *tps6105x = rdev_get_drvdata(rdev); 482edd3b69SLinus Walleij int ret; 492edd3b69SLinus Walleij 502edd3b69SLinus Walleij /* Set into shutdown mode */ 512edd3b69SLinus Walleij ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0, 522edd3b69SLinus Walleij TPS6105X_REG0_MODE_MASK, 532edd3b69SLinus Walleij TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT); 542edd3b69SLinus Walleij if (ret) 552edd3b69SLinus Walleij return ret; 562edd3b69SLinus Walleij 572edd3b69SLinus Walleij return 0; 582edd3b69SLinus Walleij } 592edd3b69SLinus Walleij 602edd3b69SLinus Walleij static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev) 612edd3b69SLinus Walleij { 622edd3b69SLinus Walleij struct tps6105x *tps6105x = rdev_get_drvdata(rdev); 632edd3b69SLinus Walleij u8 regval; 642edd3b69SLinus Walleij int ret; 652edd3b69SLinus Walleij 662edd3b69SLinus Walleij ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val); 672edd3b69SLinus Walleij if (ret) 682edd3b69SLinus Walleij return ret; 692edd3b69SLinus Walleij regval &= TPS6105X_REG0_MODE_MASK; 702edd3b69SLinus Walleij regval >>= TPS6105X_REG0_MODE_SHIFT; 712edd3b69SLinus Walleij 722edd3b69SLinus Walleij if (regval == TPS6105X_REG0_MODE_VOLTAGE) 732edd3b69SLinus Walleij return 1; 742edd3b69SLinus Walleij 752edd3b69SLinus Walleij return 0; 762edd3b69SLinus Walleij } 772edd3b69SLinus Walleij 782edd3b69SLinus Walleij static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev) 792edd3b69SLinus Walleij { 802edd3b69SLinus Walleij struct tps6105x *tps6105x = rdev_get_drvdata(rdev); 812edd3b69SLinus Walleij u8 regval; 822edd3b69SLinus Walleij int ret; 832edd3b69SLinus Walleij 842edd3b69SLinus Walleij ret = tps6105x_get(tps6105x, TPS6105X_REG_0, ®val); 852edd3b69SLinus Walleij if (ret) 862edd3b69SLinus Walleij return ret; 872edd3b69SLinus Walleij 882edd3b69SLinus Walleij regval &= TPS6105X_REG0_VOLTAGE_MASK; 892edd3b69SLinus Walleij regval >>= TPS6105X_REG0_VOLTAGE_SHIFT; 902edd3b69SLinus Walleij return (int) regval; 912edd3b69SLinus Walleij } 922edd3b69SLinus Walleij 932edd3b69SLinus Walleij static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev, 942edd3b69SLinus Walleij unsigned selector) 952edd3b69SLinus Walleij { 962edd3b69SLinus Walleij struct tps6105x *tps6105x = rdev_get_drvdata(rdev); 972edd3b69SLinus Walleij int ret; 982edd3b69SLinus Walleij 992edd3b69SLinus Walleij ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0, 1002edd3b69SLinus Walleij TPS6105X_REG0_VOLTAGE_MASK, 1012edd3b69SLinus Walleij selector << TPS6105X_REG0_VOLTAGE_SHIFT); 1022edd3b69SLinus Walleij if (ret) 1032edd3b69SLinus Walleij return ret; 1042edd3b69SLinus Walleij 1052edd3b69SLinus Walleij return 0; 1062edd3b69SLinus Walleij } 1072edd3b69SLinus Walleij 1082edd3b69SLinus Walleij static struct regulator_ops tps6105x_regulator_ops = { 1092edd3b69SLinus Walleij .enable = tps6105x_regulator_enable, 1102edd3b69SLinus Walleij .disable = tps6105x_regulator_disable, 1112edd3b69SLinus Walleij .is_enabled = tps6105x_regulator_is_enabled, 1122edd3b69SLinus Walleij .get_voltage_sel = tps6105x_regulator_get_voltage_sel, 1132edd3b69SLinus Walleij .set_voltage_sel = tps6105x_regulator_set_voltage_sel, 114c55979b7SAxel Lin .list_voltage = regulator_list_voltage_table, 1152edd3b69SLinus Walleij }; 1162edd3b69SLinus Walleij 117d882d73eSAxel Lin static const struct regulator_desc tps6105x_regulator_desc = { 1182edd3b69SLinus Walleij .name = "tps6105x-boost", 1192edd3b69SLinus Walleij .ops = &tps6105x_regulator_ops, 1202edd3b69SLinus Walleij .type = REGULATOR_VOLTAGE, 1212edd3b69SLinus Walleij .id = 0, 1222edd3b69SLinus Walleij .owner = THIS_MODULE, 1232edd3b69SLinus Walleij .n_voltages = ARRAY_SIZE(tps6105x_voltages), 124c55979b7SAxel Lin .volt_table = tps6105x_voltages, 1252edd3b69SLinus Walleij }; 1262edd3b69SLinus Walleij 1272edd3b69SLinus Walleij /* 1282edd3b69SLinus Walleij * Registers the chip as a voltage regulator 1292edd3b69SLinus Walleij */ 1302edd3b69SLinus Walleij static int __devinit tps6105x_regulator_probe(struct platform_device *pdev) 1312edd3b69SLinus Walleij { 132a7c98ce2SSamuel Ortiz struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev); 1332edd3b69SLinus Walleij struct tps6105x_platform_data *pdata = tps6105x->pdata; 134c172708dSMark Brown struct regulator_config config = { }; 1352edd3b69SLinus Walleij int ret; 1362edd3b69SLinus Walleij 1372edd3b69SLinus Walleij /* This instance is not set for regulator mode so bail out */ 1382edd3b69SLinus Walleij if (pdata->mode != TPS6105X_MODE_VOLTAGE) { 1392edd3b69SLinus Walleij dev_info(&pdev->dev, 1402edd3b69SLinus Walleij "chip not in voltage mode mode, exit probe \n"); 1412edd3b69SLinus Walleij return 0; 1422edd3b69SLinus Walleij } 1432edd3b69SLinus Walleij 144c172708dSMark Brown config.dev = &tps6105x->client->dev; 145c172708dSMark Brown config.init_data = pdata->regulator_data; 146c172708dSMark Brown config.driver_data = tps6105x; 147c172708dSMark Brown 1482edd3b69SLinus Walleij /* Register regulator with framework */ 1492edd3b69SLinus Walleij tps6105x->regulator = regulator_register(&tps6105x_regulator_desc, 150c172708dSMark Brown &config); 1512edd3b69SLinus Walleij if (IS_ERR(tps6105x->regulator)) { 1522edd3b69SLinus Walleij ret = PTR_ERR(tps6105x->regulator); 1532edd3b69SLinus Walleij dev_err(&tps6105x->client->dev, 1542edd3b69SLinus Walleij "failed to register regulator\n"); 1552edd3b69SLinus Walleij return ret; 1562edd3b69SLinus Walleij } 157f0f060bdSAxel Lin platform_set_drvdata(pdev, tps6105x); 1582edd3b69SLinus Walleij 1592edd3b69SLinus Walleij return 0; 1602edd3b69SLinus Walleij } 1612edd3b69SLinus Walleij 1622edd3b69SLinus Walleij static int __devexit tps6105x_regulator_remove(struct platform_device *pdev) 1632edd3b69SLinus Walleij { 164a7c98ce2SSamuel Ortiz struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev); 1652edd3b69SLinus Walleij regulator_unregister(tps6105x->regulator); 1662edd3b69SLinus Walleij return 0; 1672edd3b69SLinus Walleij } 1682edd3b69SLinus Walleij 1692edd3b69SLinus Walleij static struct platform_driver tps6105x_regulator_driver = { 1702edd3b69SLinus Walleij .driver = { 1712edd3b69SLinus Walleij .name = "tps6105x-regulator", 1722edd3b69SLinus Walleij .owner = THIS_MODULE, 1732edd3b69SLinus Walleij }, 1742edd3b69SLinus Walleij .probe = tps6105x_regulator_probe, 1752edd3b69SLinus Walleij .remove = __devexit_p(tps6105x_regulator_remove), 1762edd3b69SLinus Walleij }; 1772edd3b69SLinus Walleij 1782edd3b69SLinus Walleij static __init int tps6105x_regulator_init(void) 1792edd3b69SLinus Walleij { 1802edd3b69SLinus Walleij return platform_driver_register(&tps6105x_regulator_driver); 1812edd3b69SLinus Walleij } 1822edd3b69SLinus Walleij subsys_initcall(tps6105x_regulator_init); 1832edd3b69SLinus Walleij 1842edd3b69SLinus Walleij static __exit void tps6105x_regulator_exit(void) 1852edd3b69SLinus Walleij { 1862edd3b69SLinus Walleij platform_driver_unregister(&tps6105x_regulator_driver); 1872edd3b69SLinus Walleij } 1882edd3b69SLinus Walleij module_exit(tps6105x_regulator_exit); 1892edd3b69SLinus Walleij 1902edd3b69SLinus Walleij MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); 1912edd3b69SLinus Walleij MODULE_DESCRIPTION("TPS6105x regulator driver"); 1922edd3b69SLinus Walleij MODULE_LICENSE("GPL v2"); 1932edd3b69SLinus Walleij MODULE_ALIAS("platform:tps6105x-regulator"); 194