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  */
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 
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 
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