tty/serial: atmel_serial: whitespace and braces modifications
[zen-stable.git] / drivers / regulator / tps6105x-regulator.c
blob1011873896dc9205b4844aed9531de8cd9051531
1 /*
2 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
3 * or audio amplifiers.
5 * Copyright (C) 2011 ST-Ericsson SA
6 * Written on behalf of Linaro for ST-Ericsson
8 * Author: Linus Walleij <linus.walleij@linaro.org>
10 * License terms: GNU General Public License (GPL) version 2
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/err.h>
17 #include <linux/i2c.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>
23 static const int tps6105x_voltages[] = {
24 4500000,
25 5000000,
26 5250000,
27 5000000, /* There is an additional 5V */
30 static int tps6105x_regulator_enable(struct regulator_dev *rdev)
32 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
33 int ret;
35 /* Activate voltage mode */
36 ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
37 TPS6105X_REG0_MODE_MASK,
38 TPS6105X_REG0_MODE_VOLTAGE << TPS6105X_REG0_MODE_SHIFT);
39 if (ret)
40 return ret;
42 return 0;
45 static int tps6105x_regulator_disable(struct regulator_dev *rdev)
47 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
48 int ret;
50 /* Set into shutdown mode */
51 ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
52 TPS6105X_REG0_MODE_MASK,
53 TPS6105X_REG0_MODE_SHUTDOWN << TPS6105X_REG0_MODE_SHIFT);
54 if (ret)
55 return ret;
57 return 0;
60 static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
62 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
63 u8 regval;
64 int ret;
66 ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
67 if (ret)
68 return ret;
69 regval &= TPS6105X_REG0_MODE_MASK;
70 regval >>= TPS6105X_REG0_MODE_SHIFT;
72 if (regval == TPS6105X_REG0_MODE_VOLTAGE)
73 return 1;
75 return 0;
78 static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
80 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
81 u8 regval;
82 int ret;
84 ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
85 if (ret)
86 return ret;
88 regval &= TPS6105X_REG0_VOLTAGE_MASK;
89 regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
90 return (int) regval;
93 static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
94 unsigned selector)
96 struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
97 int ret;
99 ret = tps6105x_mask_and_set(tps6105x, TPS6105X_REG_0,
100 TPS6105X_REG0_VOLTAGE_MASK,
101 selector << TPS6105X_REG0_VOLTAGE_SHIFT);
102 if (ret)
103 return ret;
105 return 0;
108 static int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
109 unsigned selector)
111 if (selector >= ARRAY_SIZE(tps6105x_voltages))
112 return -EINVAL;
114 return tps6105x_voltages[selector];
117 static struct regulator_ops tps6105x_regulator_ops = {
118 .enable = tps6105x_regulator_enable,
119 .disable = tps6105x_regulator_disable,
120 .is_enabled = tps6105x_regulator_is_enabled,
121 .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
122 .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
123 .list_voltage = tps6105x_regulator_list_voltage,
126 static struct regulator_desc tps6105x_regulator_desc = {
127 .name = "tps6105x-boost",
128 .ops = &tps6105x_regulator_ops,
129 .type = REGULATOR_VOLTAGE,
130 .id = 0,
131 .owner = THIS_MODULE,
132 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
136 * Registers the chip as a voltage regulator
138 static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
140 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
141 struct tps6105x_platform_data *pdata = tps6105x->pdata;
142 int ret;
144 /* This instance is not set for regulator mode so bail out */
145 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
146 dev_info(&pdev->dev,
147 "chip not in voltage mode mode, exit probe \n");
148 return 0;
151 /* Register regulator with framework */
152 tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
153 &tps6105x->client->dev,
154 pdata->regulator_data, tps6105x);
155 if (IS_ERR(tps6105x->regulator)) {
156 ret = PTR_ERR(tps6105x->regulator);
157 dev_err(&tps6105x->client->dev,
158 "failed to register regulator\n");
159 return ret;
161 platform_set_drvdata(pdev, tps6105x);
163 return 0;
166 static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
168 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
169 regulator_unregister(tps6105x->regulator);
170 return 0;
173 static struct platform_driver tps6105x_regulator_driver = {
174 .driver = {
175 .name = "tps6105x-regulator",
176 .owner = THIS_MODULE,
178 .probe = tps6105x_regulator_probe,
179 .remove = __devexit_p(tps6105x_regulator_remove),
182 static __init int tps6105x_regulator_init(void)
184 return platform_driver_register(&tps6105x_regulator_driver);
186 subsys_initcall(tps6105x_regulator_init);
188 static __exit void tps6105x_regulator_exit(void)
190 platform_driver_unregister(&tps6105x_regulator_driver);
192 module_exit(tps6105x_regulator_exit);
194 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
195 MODULE_DESCRIPTION("TPS6105x regulator driver");
196 MODULE_LICENSE("GPL v2");
197 MODULE_ALIAS("platform:tps6105x-regulator");