1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
4 * or audio amplifiers.
5 *
6 * Copyright (C) 2011 ST-Ericsson SA
7 * Written on behalf of Linaro for ST-Ericsson
8 *
9 * Author: Linus Walleij <linus.walleij@linaro.org>
10 */
11
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/err.h>
16 #include <linux/regmap.h>
17 #include <linux/platform_device.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/mfd/core.h>
20 #include <linux/mfd/tps6105x.h>
21
22 static const unsigned int tps6105x_voltages[] = {
23 4500000,
24 5000000,
25 5250000,
26 5000000, /* There is an additional 5V */
27 };
28
29 static struct regulator_ops tps6105x_regulator_ops = {
30 .enable = regulator_enable_regmap,
31 .disable = regulator_disable_regmap,
32 .is_enabled = regulator_is_enabled_regmap,
33 .get_voltage_sel = regulator_get_voltage_sel_regmap,
34 .set_voltage_sel = regulator_set_voltage_sel_regmap,
35 .list_voltage = regulator_list_voltage_table,
36 };
37
38 static const struct regulator_desc tps6105x_regulator_desc = {
39 .name = "tps6105x-boost",
40 .ops = &tps6105x_regulator_ops,
41 .type = REGULATOR_VOLTAGE,
42 .id = 0,
43 .owner = THIS_MODULE,
44 .n_voltages = ARRAY_SIZE(tps6105x_voltages),
45 .volt_table = tps6105x_voltages,
46 .vsel_reg = TPS6105X_REG_0,
47 .vsel_mask = TPS6105X_REG0_VOLTAGE_MASK,
48 .enable_reg = TPS6105X_REG_0,
49 .enable_mask = TPS6105X_REG0_MODE_MASK,
50 .enable_val = TPS6105X_REG0_MODE_VOLTAGE <<
51 TPS6105X_REG0_MODE_SHIFT,
52 };
53
54 /*
55 * Registers the chip as a voltage regulator
56 */
tps6105x_regulator_probe(struct platform_device * pdev)57 static int tps6105x_regulator_probe(struct platform_device *pdev)
58 {
59 struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
60 struct tps6105x_platform_data *pdata = tps6105x->pdata;
61 struct regulator_config config = { };
62 int ret;
63
64 /* This instance is not set for regulator mode so bail out */
65 if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
66 dev_info(&pdev->dev,
67 "chip not in voltage mode mode, exit probe\n");
68 return 0;
69 }
70
71 config.dev = &tps6105x->client->dev;
72 config.init_data = pdata->regulator_data;
73 config.driver_data = tps6105x;
74 config.regmap = tps6105x->regmap;
75
76 /* Register regulator with framework */
77 tps6105x->regulator = devm_regulator_register(&pdev->dev,
78 &tps6105x_regulator_desc,
79 &config);
80 if (IS_ERR(tps6105x->regulator)) {
81 ret = PTR_ERR(tps6105x->regulator);
82 dev_err(&tps6105x->client->dev,
83 "failed to register regulator\n");
84 return ret;
85 }
86 platform_set_drvdata(pdev, tps6105x);
87
88 return 0;
89 }
90
91 static struct platform_driver tps6105x_regulator_driver = {
92 .driver = {
93 .name = "tps6105x-regulator",
94 },
95 .probe = tps6105x_regulator_probe,
96 };
97
tps6105x_regulator_init(void)98 static __init int tps6105x_regulator_init(void)
99 {
100 return platform_driver_register(&tps6105x_regulator_driver);
101 }
102 subsys_initcall(tps6105x_regulator_init);
103
tps6105x_regulator_exit(void)104 static __exit void tps6105x_regulator_exit(void)
105 {
106 platform_driver_unregister(&tps6105x_regulator_driver);
107 }
108 module_exit(tps6105x_regulator_exit);
109
110 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
111 MODULE_DESCRIPTION("TPS6105x regulator driver");
112 MODULE_LICENSE("GPL v2");
113 MODULE_ALIAS("platform:tps6105x-regulator");
114