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/regulator/driver.h>
6#include <linux/regmap.h>
7
8static const struct regulator_ops pg86x_ops = {
9	.set_voltage_sel = regulator_set_voltage_sel_regmap,
10	.get_voltage_sel = regulator_get_voltage_sel_regmap,
11	.list_voltage = regulator_list_voltage_linear_range,
12};
13
14static const struct linear_range pg86x_buck1_ranges[] = {
15	REGULATOR_LINEAR_RANGE(      0,  0, 10,     0),
16	REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
17	REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
18};
19
20static const struct linear_range pg86x_buck2_ranges[] = {
21	REGULATOR_LINEAR_RANGE(      0,  0, 15,     0),
22	REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
23	REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
24};
25
26static const struct regulator_desc pg86x_regulators[] = {
27	{
28		.id = 0,
29		.type = REGULATOR_VOLTAGE,
30		.name = "buck1",
31		.of_match = of_match_ptr("buck1"),
32		.n_voltages = 11 + 24 + 13,
33		.linear_ranges = pg86x_buck1_ranges,
34		.n_linear_ranges = 3,
35		.vsel_reg  = 0x24,
36		.vsel_mask = 0xff,
37		.ops = &pg86x_ops,
38		.owner = THIS_MODULE
39	},
40	{
41		.id = 1,
42		.type = REGULATOR_VOLTAGE,
43		.name = "buck2",
44		.of_match = of_match_ptr("buck2"),
45		.n_voltages = 16 + 24 + 13,
46		.linear_ranges = pg86x_buck2_ranges,
47		.n_linear_ranges = 3,
48		.vsel_reg  = 0x13,
49		.vsel_mask = 0xff,
50		.ops = &pg86x_ops,
51		.owner = THIS_MODULE
52	},
53};
54
55static const struct regmap_config pg86x_regmap = {
56	.reg_bits = 8,
57	.val_bits = 8,
58};
59
60static int pg86x_i2c_probe(struct i2c_client *i2c)
61{
62	int id, ret;
63	struct regulator_config config = {.dev = &i2c->dev};
64	struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
65
66	if (IS_ERR(regmap)) {
67		ret = PTR_ERR(regmap);
68		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
69		return ret;
70	}
71
72	for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
73		struct regulator_dev *rdev;
74		rdev = devm_regulator_register(&i2c->dev,
75					       &pg86x_regulators[id],
76					       &config);
77		if (IS_ERR(rdev)) {
78			ret = PTR_ERR(rdev);
79			dev_err(&i2c->dev, "failed to register %s: %d\n",
80				pg86x_regulators[id].name, ret);
81			return ret;
82		}
83	}
84	return 0;
85}
86
87static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
88	{ .compatible = "marvell,88pg867" },
89	{ .compatible = "marvell,88pg868" },
90	{ }
91};
92MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
93
94static const struct i2c_device_id pg86x_i2c_id[] = {
95	{ "88pg867", },
96	{ "88pg868", },
97	{ }
98};
99MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
100
101static struct i2c_driver pg86x_regulator_driver = {
102	.driver = {
103		.name = "88pg86x",
104		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
105		.of_match_table = of_match_ptr(pg86x_dt_ids),
106	},
107	.probe = pg86x_i2c_probe,
108	.id_table = pg86x_i2c_id,
109};
110
111module_i2c_driver(pg86x_regulator_driver);
112
113MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
114MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
115MODULE_LICENSE("GPL");
116