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
8 static 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
14 static 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
20 static 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
26 static 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
55 static const struct regmap_config pg86x_regmap = {
56 .reg_bits = 8,
57 .val_bits = 8,
58 };
59
pg86x_i2c_probe(struct i2c_client * i2c)60 static 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
87 static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
88 { .compatible = "marvell,88pg867" },
89 { .compatible = "marvell,88pg868" },
90 { }
91 };
92 MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
93
94 static const struct i2c_device_id pg86x_i2c_id[] = {
95 { "88pg867", },
96 { "88pg868", },
97 { }
98 };
99 MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
100
101 static struct i2c_driver pg86x_regulator_driver = {
102 .driver = {
103 .name = "88pg86x",
104 .of_match_table = of_match_ptr(pg86x_dt_ids),
105 },
106 .probe_new = pg86x_i2c_probe,
107 .id_table = pg86x_i2c_id,
108 };
109
110 module_i2c_driver(pg86x_regulator_driver);
111
112 MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
113 MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
114 MODULE_LICENSE("GPL");
115
