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Linux/drivers/regulator/tps6105x-regulator.c

  1 /*
  2  * Driver for TPS61050/61052 boost converters, typically used for white LEDs
  3  * or audio amplifiers.
  4  *
  5  * Copyright (C) 2011 ST-Ericsson SA
  6  * Written on behalf of Linaro for ST-Ericsson
  7  *
  8  * Author: Linus Walleij <linus.walleij@linaro.org>
  9  *
 10  * License terms: GNU General Public License (GPL) version 2
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <linux/kernel.h>
 15 #include <linux/init.h>
 16 #include <linux/err.h>
 17 #include <linux/regmap.h>
 18 #include <linux/platform_device.h>
 19 #include <linux/regulator/driver.h>
 20 #include <linux/mfd/core.h>
 21 #include <linux/mfd/tps6105x.h>
 22 
 23 static const unsigned int tps6105x_voltages[] = {
 24         4500000,
 25         5000000,
 26         5250000,
 27         5000000, /* There is an additional 5V */
 28 };
 29 
 30 static struct regulator_ops tps6105x_regulator_ops = {
 31         .enable         = regulator_enable_regmap,
 32         .disable        = regulator_disable_regmap,
 33         .is_enabled     = regulator_is_enabled_regmap,
 34         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 35         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 36         .list_voltage   = regulator_list_voltage_table,
 37 };
 38 
 39 static const struct regulator_desc tps6105x_regulator_desc = {
 40         .name           = "tps6105x-boost",
 41         .ops            = &tps6105x_regulator_ops,
 42         .type           = REGULATOR_VOLTAGE,
 43         .id             = 0,
 44         .owner          = THIS_MODULE,
 45         .n_voltages     = ARRAY_SIZE(tps6105x_voltages),
 46         .volt_table     = tps6105x_voltages,
 47         .vsel_reg       = TPS6105X_REG_0,
 48         .vsel_mask      = TPS6105X_REG0_VOLTAGE_MASK,
 49         .enable_reg     = TPS6105X_REG_0,
 50         .enable_mask    = TPS6105X_REG0_MODE_MASK,
 51         .enable_val     = TPS6105X_REG0_MODE_VOLTAGE <<
 52                           TPS6105X_REG0_MODE_SHIFT,
 53 };
 54 
 55 /*
 56  * Registers the chip as a voltage regulator
 57  */
 58 static int tps6105x_regulator_probe(struct platform_device *pdev)
 59 {
 60         struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
 61         struct tps6105x_platform_data *pdata = tps6105x->pdata;
 62         struct regulator_config config = { };
 63         int ret;
 64 
 65         /* This instance is not set for regulator mode so bail out */
 66         if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
 67                 dev_info(&pdev->dev,
 68                         "chip not in voltage mode mode, exit probe\n");
 69                 return 0;
 70         }
 71 
 72         config.dev = &tps6105x->client->dev;
 73         config.init_data = pdata->regulator_data;
 74         config.driver_data = tps6105x;
 75         config.regmap = tps6105x->regmap;
 76 
 77         /* Register regulator with framework */
 78         tps6105x->regulator = devm_regulator_register(&pdev->dev,
 79                                                       &tps6105x_regulator_desc,
 80                                                       &config);
 81         if (IS_ERR(tps6105x->regulator)) {
 82                 ret = PTR_ERR(tps6105x->regulator);
 83                 dev_err(&tps6105x->client->dev,
 84                         "failed to register regulator\n");
 85                 return ret;
 86         }
 87         platform_set_drvdata(pdev, tps6105x);
 88 
 89         return 0;
 90 }
 91 
 92 static struct platform_driver tps6105x_regulator_driver = {
 93         .driver = {
 94                 .name  = "tps6105x-regulator",
 95         },
 96         .probe = tps6105x_regulator_probe,
 97 };
 98 
 99 static __init int tps6105x_regulator_init(void)
100 {
101         return platform_driver_register(&tps6105x_regulator_driver);
102 }
103 subsys_initcall(tps6105x_regulator_init);
104 
105 static __exit void tps6105x_regulator_exit(void)
106 {
107         platform_driver_unregister(&tps6105x_regulator_driver);
108 }
109 module_exit(tps6105x_regulator_exit);
110 
111 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
112 MODULE_DESCRIPTION("TPS6105x regulator driver");
113 MODULE_LICENSE("GPL v2");
114 MODULE_ALIAS("platform:tps6105x-regulator");
115 

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