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Linus Walleij2edd3b62011-03-09 12:02:55 +00001/*
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
Axel Linc55979b2012-05-20 10:37:33 +080023static const unsigned int tps6105x_voltages[] = {
Linus Walleij2edd3b62011-03-09 12:02:55 +000024 4500000,
25 5000000,
26 5250000,
27 5000000, /* There is an additional 5V */
28};
29
30static 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
45static 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
60static 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
78static 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
93static 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
Linus Walleij2edd3b62011-03-09 12:02:55 +0000108static struct regulator_ops tps6105x_regulator_ops = {
109 .enable = tps6105x_regulator_enable,
110 .disable = tps6105x_regulator_disable,
111 .is_enabled = tps6105x_regulator_is_enabled,
112 .get_voltage_sel = tps6105x_regulator_get_voltage_sel,
113 .set_voltage_sel = tps6105x_regulator_set_voltage_sel,
Axel Linc55979b2012-05-20 10:37:33 +0800114 .list_voltage = regulator_list_voltage_table,
Linus Walleij2edd3b62011-03-09 12:02:55 +0000115};
116
Axel Lind882d732012-04-06 08:30:42 +0800117static const struct regulator_desc tps6105x_regulator_desc = {
Linus Walleij2edd3b62011-03-09 12:02:55 +0000118 .name = "tps6105x-boost",
119 .ops = &tps6105x_regulator_ops,
120 .type = REGULATOR_VOLTAGE,
121 .id = 0,
122 .owner = THIS_MODULE,
123 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
Axel Linc55979b2012-05-20 10:37:33 +0800124 .volt_table = tps6105x_voltages,
Linus Walleij2edd3b62011-03-09 12:02:55 +0000125};
126
127/*
128 * Registers the chip as a voltage regulator
129 */
Bill Pembertona5023572012-11-19 13:22:22 -0500130static int tps6105x_regulator_probe(struct platform_device *pdev)
Linus Walleij2edd3b62011-03-09 12:02:55 +0000131{
Samuel Ortiza7c98ce2011-05-11 10:33:25 +0200132 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
Linus Walleij2edd3b62011-03-09 12:02:55 +0000133 struct tps6105x_platform_data *pdata = tps6105x->pdata;
Mark Brownc1727082012-04-04 00:50:22 +0100134 struct regulator_config config = { };
Linus Walleij2edd3b62011-03-09 12:02:55 +0000135 int ret;
136
137 /* This instance is not set for regulator mode so bail out */
138 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
139 dev_info(&pdev->dev,
140 "chip not in voltage mode mode, exit probe \n");
141 return 0;
142 }
143
Mark Brownc1727082012-04-04 00:50:22 +0100144 config.dev = &tps6105x->client->dev;
145 config.init_data = pdata->regulator_data;
146 config.driver_data = tps6105x;
147
Linus Walleij2edd3b62011-03-09 12:02:55 +0000148 /* Register regulator with framework */
149 tps6105x->regulator = regulator_register(&tps6105x_regulator_desc,
Mark Brownc1727082012-04-04 00:50:22 +0100150 &config);
Linus Walleij2edd3b62011-03-09 12:02:55 +0000151 if (IS_ERR(tps6105x->regulator)) {
152 ret = PTR_ERR(tps6105x->regulator);
153 dev_err(&tps6105x->client->dev,
154 "failed to register regulator\n");
155 return ret;
156 }
Axel Linf0f060b2011-03-29 17:54:58 +0800157 platform_set_drvdata(pdev, tps6105x);
Linus Walleij2edd3b62011-03-09 12:02:55 +0000158
159 return 0;
160}
161
Bill Pemberton8dc995f2012-11-19 13:26:10 -0500162static int tps6105x_regulator_remove(struct platform_device *pdev)
Linus Walleij2edd3b62011-03-09 12:02:55 +0000163{
Samuel Ortiza7c98ce2011-05-11 10:33:25 +0200164 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
Linus Walleij2edd3b62011-03-09 12:02:55 +0000165 regulator_unregister(tps6105x->regulator);
166 return 0;
167}
168
169static struct platform_driver tps6105x_regulator_driver = {
170 .driver = {
171 .name = "tps6105x-regulator",
172 .owner = THIS_MODULE,
173 },
174 .probe = tps6105x_regulator_probe,
Bill Pemberton5eb9f2b2012-11-19 13:20:42 -0500175 .remove = tps6105x_regulator_remove,
Linus Walleij2edd3b62011-03-09 12:02:55 +0000176};
177
178static __init int tps6105x_regulator_init(void)
179{
180 return platform_driver_register(&tps6105x_regulator_driver);
181}
182subsys_initcall(tps6105x_regulator_init);
183
184static __exit void tps6105x_regulator_exit(void)
185{
186 platform_driver_unregister(&tps6105x_regulator_driver);
187}
188module_exit(tps6105x_regulator_exit);
189
190MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
191MODULE_DESCRIPTION("TPS6105x regulator driver");
192MODULE_LICENSE("GPL v2");
193MODULE_ALIAS("platform:tps6105x-regulator");