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
22static const unsigned int tps6105x_voltages[] = {
23	4500000,
24	5000000,
25	5250000,
26	5000000, /* There is an additional 5V */
27};
28
29static 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
38static 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 */
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.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
93static 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
101static __init int tps6105x_regulator_init(void)
102{
103	return platform_driver_register(&tps6105x_regulator_driver);
104}
105subsys_initcall(tps6105x_regulator_init);
106
107static __exit void tps6105x_regulator_exit(void)
108{
109	platform_driver_unregister(&tps6105x_regulator_driver);
110}
111module_exit(tps6105x_regulator_exit);
112
113MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
114MODULE_DESCRIPTION("TPS6105x regulator driver");
115MODULE_LICENSE("GPL v2");
116MODULE_ALIAS("platform:tps6105x-regulator");
117