1// SPDX-License-Identifier: GPL-2.0+
2#include <linux/module.h>
3#include <linux/i2c.h>
4#include <linux/of.h>
5#include <linux/regmap.h>
6#include <linux/regulator/driver.h>
7
8static const struct regulator_ops max8893_ops = {
9	.is_enabled		= regulator_is_enabled_regmap,
10	.enable			= regulator_enable_regmap,
11	.disable		= regulator_disable_regmap,
12	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
13	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
14	.list_voltage		= regulator_list_voltage_linear,
15	.map_voltage		= regulator_map_voltage_linear,
16};
17
18static const struct regulator_desc max8893_regulators[] = {
19	{
20		.name = "BUCK",
21		.supply_name = "in-buck",
22		.of_match = of_match_ptr("buck"),
23		.regulators_node = of_match_ptr("regulators"),
24		.n_voltages = 0x11,
25		.id = 6,
26		.ops = &max8893_ops,
27		.type = REGULATOR_VOLTAGE,
28		.owner = THIS_MODULE,
29		.min_uV = 800000,
30		.uV_step = 100000,
31		.vsel_reg = 0x4,
32		.vsel_mask = 0x1f,
33		.enable_reg = 0x0,
34		.enable_mask = BIT(7),
35	},
36	{
37		.name = "LDO1",
38		.supply_name = "in-ldo1",
39		.of_match = of_match_ptr("ldo1"),
40		.regulators_node = of_match_ptr("regulators"),
41		.n_voltages = 0x12,
42		.id = 1,
43		.ops = &max8893_ops,
44		.type = REGULATOR_VOLTAGE,
45		.owner = THIS_MODULE,
46		.min_uV = 1600000,
47		.uV_step = 100000,
48		.vsel_reg = 0x5,
49		.vsel_mask = 0x1f,
50		.enable_reg = 0x0,
51		.enable_mask = BIT(5),
52	},
53	{
54		.name = "LDO2",
55		.supply_name = "in-ldo2",
56		.of_match = of_match_ptr("ldo2"),
57		.regulators_node = of_match_ptr("regulators"),
58		.n_voltages = 0x16,
59		.id = 2,
60		.ops = &max8893_ops,
61		.type = REGULATOR_VOLTAGE,
62		.owner = THIS_MODULE,
63		.min_uV = 1200000,
64		.uV_step = 100000,
65		.vsel_reg = 0x6,
66		.vsel_mask = 0x1f,
67		.enable_reg = 0x0,
68		.enable_mask = BIT(4),
69	},
70	{
71		.name = "LDO3",
72		.supply_name = "in-ldo3",
73		.of_match = of_match_ptr("ldo3"),
74		.regulators_node = of_match_ptr("regulators"),
75		.n_voltages = 0x12,
76		.id = 3,
77		.ops = &max8893_ops,
78		.type = REGULATOR_VOLTAGE,
79		.owner = THIS_MODULE,
80		.min_uV = 1600000,
81		.uV_step = 100000,
82		.vsel_reg = 0x7,
83		.vsel_mask = 0x1f,
84		.enable_reg = 0x0,
85		.enable_mask = BIT(3),
86	},
87	{
88		.name = "LDO4",
89		.supply_name = "in-ldo4",
90		.of_match = of_match_ptr("ldo4"),
91		.regulators_node = of_match_ptr("regulators"),
92		.n_voltages = 0x1a,
93		.id = 4,
94		.ops = &max8893_ops,
95		.type = REGULATOR_VOLTAGE,
96		.owner = THIS_MODULE,
97		.min_uV = 800000,
98		.uV_step = 100000,
99		.vsel_reg = 0x8,
100		.vsel_mask = 0x1f,
101		.enable_reg = 0x0,
102		.enable_mask = BIT(2),
103	},
104	{
105		.name = "LDO5",
106		.supply_name = "in-ldo5",
107		.of_match = of_match_ptr("ldo5"),
108		.regulators_node = of_match_ptr("regulators"),
109		.n_voltages = 0x1a,
110		.id = 5,
111		.ops = &max8893_ops,
112		.type = REGULATOR_VOLTAGE,
113		.owner = THIS_MODULE,
114		.min_uV = 800000,
115		.uV_step = 100000,
116		.vsel_reg = 0x9,
117		.vsel_mask = 0x1f,
118		.enable_reg = 0x0,
119		.enable_mask = BIT(1),
120	}
121};
122
123static const struct regmap_config max8893_regmap = {
124	.reg_bits = 8,
125	.val_bits = 8,
126};
127
128static int max8893_probe(struct i2c_client *i2c)
129{
130	int id, ret;
131	struct regulator_config config = {.dev = &i2c->dev};
132	struct regmap *regmap = devm_regmap_init_i2c(i2c, &max8893_regmap);
133
134	if (IS_ERR(regmap)) {
135		ret = PTR_ERR(regmap);
136		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
137		return ret;
138	}
139
140	for (id = 0; id < ARRAY_SIZE(max8893_regulators); id++) {
141		struct regulator_dev *rdev;
142		rdev = devm_regulator_register(&i2c->dev,
143					       &max8893_regulators[id],
144					       &config);
145		if (IS_ERR(rdev)) {
146			ret = PTR_ERR(rdev);
147			dev_err(&i2c->dev, "failed to register %s: %d\n",
148				max8893_regulators[id].name, ret);
149			return ret;
150		}
151	}
152
153	return 0;
154}
155
156#ifdef CONFIG_OF
157static const struct of_device_id max8893_dt_match[] = {
158	{ .compatible = "maxim,max8893" },
159	{ /* sentinel */ },
160};
161MODULE_DEVICE_TABLE(of, max8893_dt_match);
162#endif
163
164static const struct i2c_device_id max8893_ids[] = {
165	{ "max8893", 0 },
166	{ },
167};
168MODULE_DEVICE_TABLE(i2c, max8893_ids);
169
170static struct i2c_driver max8893_driver = {
171	.probe		= max8893_probe,
172	.driver		= {
173		.name	= "max8893",
174		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
175		.of_match_table = of_match_ptr(max8893_dt_match),
176	},
177	.id_table	= max8893_ids,
178};
179
180module_i2c_driver(max8893_driver);
181
182MODULE_DESCRIPTION("Maxim MAX8893 PMIC driver");
183MODULE_AUTHOR("Sergey Larin <cerg2010cerg2010@mail.ru>");
184MODULE_LICENSE("GPL");
185