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 
16 static 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 
23 static 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 
33 static 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 
81 static 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 
109 static const struct platform_device_id rt5033_regulator_id[] = {
110 	{ "rt5033-regulator", },
111 	{ }
112 };
113 MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
114 
115 static 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 };
122 module_platform_driver(rt5033_regulator_driver);
123 
124 MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
125 MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
126 MODULE_LICENSE("GPL");
127