tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
23static const unsigned int tps6105x_voltages[] = {
24 4500000,
25 5000000,
26 5250000,
27 5000000, /* There is an additional 5V */
28};
29
30static 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
39static 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 */
58static 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
92static struct platform_driver tps6105x_regulator_driver = {
93 .driver = {
94 .name = "tps6105x-regulator",
95 },
96 .probe = tps6105x_regulator_probe,
97};
98
99static __init int tps6105x_regulator_init(void)
100{
101 return platform_driver_register(&tps6105x_regulator_driver);
102}
103subsys_initcall(tps6105x_regulator_init);
104
105static __exit void tps6105x_regulator_exit(void)
106{
107 platform_driver_unregister(&tps6105x_regulator_driver);
108}
109module_exit(tps6105x_regulator_exit);
110
111MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
112MODULE_DESCRIPTION("TPS6105x regulator driver");
113MODULE_LICENSE("GPL v2");
114MODULE_ALIAS("platform:tps6105x-regulator");