1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regulator driver for the Richtek RT5033
4 *
5 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
6 * Author: Beomho Seo <beomho.seo@samsung.com>
7 */
8
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/regulator/driver.h>
12#include <linux/mfd/rt5033.h>
13#include <linux/mfd/rt5033-private.h>
14#include <linux/regulator/of_regulator.h>
15
16static const struct regulator_ops rt5033_safe_ldo_ops = {
17	.is_enabled		= regulator_is_enabled_regmap,
18	.enable			= regulator_enable_regmap,
19	.disable		= regulator_disable_regmap,
20	.list_voltage		= regulator_list_voltage_linear,
21};
22
23static const struct regulator_ops rt5033_buck_ops = {
24	.is_enabled		= regulator_is_enabled_regmap,
25	.enable			= regulator_enable_regmap,
26	.disable		= regulator_disable_regmap,
27	.list_voltage		= regulator_list_voltage_linear,
28	.map_voltage		= regulator_map_voltage_linear,
29	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
30	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
31};
32
33static const struct regulator_desc rt5033_supported_regulators[] = {
34	[RT5033_BUCK] = {
35		.name		= "BUCK",
36		.of_match	= of_match_ptr("BUCK"),
37		.regulators_node = of_match_ptr("regulators"),
38		.id		= RT5033_BUCK,
39		.ops		= &rt5033_buck_ops,
40		.type		= REGULATOR_VOLTAGE,
41		.owner		= THIS_MODULE,
42		.n_voltages	= RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
43		.min_uV		= RT5033_REGULATOR_BUCK_VOLTAGE_MIN,
44		.uV_step	= RT5033_REGULATOR_BUCK_VOLTAGE_STEP,
45		.enable_reg	= RT5033_REG_CTRL,
46		.enable_mask	= RT5033_CTRL_EN_BUCK_MASK,
47		.vsel_reg	= RT5033_REG_BUCK_CTRL,
48		.vsel_mask	= RT5033_BUCK_CTRL_MASK,
49	},
50	[RT5033_LDO] = {
51		.name		= "LDO",
52		.of_match	= of_match_ptr("LDO"),
53		.regulators_node = of_match_ptr("regulators"),
54		.id		= RT5033_LDO,
55		.ops		= &rt5033_buck_ops,
56		.type		= REGULATOR_VOLTAGE,
57		.owner		= THIS_MODULE,
58		.n_voltages	= RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
59		.min_uV		= RT5033_REGULATOR_LDO_VOLTAGE_MIN,
60		.uV_step	= RT5033_REGULATOR_LDO_VOLTAGE_STEP,
61		.enable_reg	= RT5033_REG_CTRL,
62		.enable_mask	= RT5033_CTRL_EN_LDO_MASK,
63		.vsel_reg	= RT5033_REG_LDO_CTRL,
64		.vsel_mask	= RT5033_LDO_CTRL_MASK,
65	},
66	[RT5033_SAFE_LDO] = {
67		.name		= "SAFE_LDO",
68		.of_match	= of_match_ptr("SAFE_LDO"),
69		.regulators_node = of_match_ptr("regulators"),
70		.id		= RT5033_SAFE_LDO,
71		.ops		= &rt5033_safe_ldo_ops,
72		.type		= REGULATOR_VOLTAGE,
73		.owner		= THIS_MODULE,
74		.n_voltages	= 1,
75		.min_uV		= RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
76		.enable_reg	= RT5033_REG_CTRL,
77		.enable_mask	= RT5033_CTRL_EN_SAFE_LDO_MASK,
78	},
79};
80
81static int rt5033_regulator_probe(struct platform_device *pdev)
82{
83	struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
84	int ret, i;
85	struct regulator_config config = {};
86
87	config.dev = rt5033->dev;
88	config.driver_data = rt5033;
89
90	for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
91		struct regulator_dev *regulator;
92
93		config.regmap = rt5033->regmap;
94
95		regulator = devm_regulator_register(&pdev->dev,
96				&rt5033_supported_regulators[i], &config);
97		if (IS_ERR(regulator)) {
98			ret = PTR_ERR(regulator);
99			dev_err(&pdev->dev,
100				"Regulator init failed %d: with error: %d\n",
101				i, ret);
102			return ret;
103		}
104	}
105
106	return 0;
107}
108
109static const struct platform_device_id rt5033_regulator_id[] = {
110	{ "rt5033-regulator", },
111	{ }
112};
113MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
114
115static struct platform_driver rt5033_regulator_driver = {
116	.driver = {
117		.name = "rt5033-regulator",
118	},
119	.probe		= rt5033_regulator_probe,
120	.id_table	= rt5033_regulator_id,
121};
122module_platform_driver(rt5033_regulator_driver);
123
124MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
125MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
126MODULE_LICENSE("GPL");
127