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  */
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 	},
97 	.probe = tps6105x_regulator_probe,
98 };
99 
100 static __init int tps6105x_regulator_init(void)
101 {
102 	return platform_driver_register(&tps6105x_regulator_driver);
103 }
104 subsys_initcall(tps6105x_regulator_init);
105 
106 static __exit void tps6105x_regulator_exit(void)
107 {
108 	platform_driver_unregister(&tps6105x_regulator_driver);
109 }
110 module_exit(tps6105x_regulator_exit);
111 
112 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
113 MODULE_DESCRIPTION("TPS6105x regulator driver");
114 MODULE_LICENSE("GPL v2");
115 MODULE_ALIAS("platform:tps6105x-regulator");
116