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 const 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 .of_match = of_match_ptr("regulator"),
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 */
tps6105x_regulator_probe(struct platform_device * pdev)58 static 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.of_node = pdev->dev.parent->of_node;
76 config.regmap = tps6105x->regmap;
77
78 /* Register regulator with framework */
79 tps6105x->regulator = devm_regulator_register(&pdev->dev,
80 &tps6105x_regulator_desc,
81 &config);
82 if (IS_ERR(tps6105x->regulator)) {
83 ret = PTR_ERR(tps6105x->regulator);
84 dev_err(&tps6105x->client->dev,
85 "failed to register regulator\n");
86 return ret;
87 }
88 platform_set_drvdata(pdev, tps6105x);
89
90 return 0;
91 }
92
93 static struct platform_driver tps6105x_regulator_driver = {
94 .driver = {
95 .name = "tps6105x-regulator",
96 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
97 },
98 .probe = tps6105x_regulator_probe,
99 };
100
tps6105x_regulator_init(void)101 static __init int tps6105x_regulator_init(void)
102 {
103 return platform_driver_register(&tps6105x_regulator_driver);
104 }
105 subsys_initcall(tps6105x_regulator_init);
106
tps6105x_regulator_exit(void)107 static __exit void tps6105x_regulator_exit(void)
108 {
109 platform_driver_unregister(&tps6105x_regulator_driver);
110 }
111 module_exit(tps6105x_regulator_exit);
112
113 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
114 MODULE_DESCRIPTION("TPS6105x regulator driver");
115 MODULE_LICENSE("GPL v2");
116 MODULE_ALIAS("platform:tps6105x-regulator");
117