mfd: max77663: Add FPWM and FSRADE clearing when initialization
[linux-2.6.git] / 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/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>
22
23 static const int tps6105x_voltages[] = {
24         4500000,
25         5000000,
26         5250000,
27         5000000, /* There is an additional 5V */
28 };
29
30 static int tps6105x_regulator_enable(struct regulator_dev *rdev)
31 {
32         struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
33         int ret;
34
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;
41
42         return 0;
43 }
44
45 static int tps6105x_regulator_disable(struct regulator_dev *rdev)
46 {
47         struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
48         int ret;
49
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;
56
57         return 0;
58 }
59
60 static int tps6105x_regulator_is_enabled(struct regulator_dev *rdev)
61 {
62         struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
63         u8 regval;
64         int ret;
65
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;
71
72         if (regval == TPS6105X_REG0_MODE_VOLTAGE)
73                 return 1;
74
75         return 0;
76 }
77
78 static int tps6105x_regulator_get_voltage_sel(struct regulator_dev *rdev)
79 {
80         struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
81         u8 regval;
82         int ret;
83
84         ret = tps6105x_get(tps6105x, TPS6105X_REG_0, &regval);
85         if (ret)
86                 return ret;
87
88         regval &= TPS6105X_REG0_VOLTAGE_MASK;
89         regval >>= TPS6105X_REG0_VOLTAGE_SHIFT;
90         return (int) regval;
91 }
92
93 static int tps6105x_regulator_set_voltage_sel(struct regulator_dev *rdev,
94                                               unsigned selector)
95 {
96         struct tps6105x *tps6105x = rdev_get_drvdata(rdev);
97         int ret;
98
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;
104
105         return 0;
106 }
107
108 static int tps6105x_regulator_list_voltage(struct regulator_dev *rdev,
109                                            unsigned selector)
110 {
111         if (selector >= ARRAY_SIZE(tps6105x_voltages))
112                 return -EINVAL;
113
114         return tps6105x_voltages[selector];
115 }
116
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,
124 };
125
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),
133 };
134
135 /*
136  * Registers the chip as a voltage regulator
137  */
138 static int __devinit tps6105x_regulator_probe(struct platform_device *pdev)
139 {
140         struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
141         struct tps6105x_platform_data *pdata = tps6105x->pdata;
142         int ret;
143
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;
149         }
150
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;
160         }
161         platform_set_drvdata(pdev, tps6105x);
162
163         return 0;
164 }
165
166 static int __devexit tps6105x_regulator_remove(struct platform_device *pdev)
167 {
168         struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
169         regulator_unregister(tps6105x->regulator);
170         return 0;
171 }
172
173 static struct platform_driver tps6105x_regulator_driver = {
174         .driver = {
175                 .name  = "tps6105x-regulator",
176                 .owner = THIS_MODULE,
177         },
178         .probe = tps6105x_regulator_probe,
179         .remove = __devexit_p(tps6105x_regulator_remove),
180 };
181
182 static __init int tps6105x_regulator_init(void)
183 {
184         return platform_driver_register(&tps6105x_regulator_driver);
185 }
186 subsys_initcall(tps6105x_regulator_init);
187
188 static __exit void tps6105x_regulator_exit(void)
189 {
190         platform_driver_unregister(&tps6105x_regulator_driver);
191 }
192 module_exit(tps6105x_regulator_exit);
193
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");