1a265b03bSAlexander Monakov // SPDX-License-Identifier: GPL-2.0
2a265b03bSAlexander Monakov #include <linux/module.h>
3a265b03bSAlexander Monakov #include <linux/i2c.h>
4a265b03bSAlexander Monakov #include <linux/of.h>
5a265b03bSAlexander Monakov #include <linux/regulator/driver.h>
6a265b03bSAlexander Monakov #include <linux/regmap.h>
7a265b03bSAlexander Monakov
8a265b03bSAlexander Monakov static const struct regulator_ops pg86x_ops = {
9a265b03bSAlexander Monakov .set_voltage_sel = regulator_set_voltage_sel_regmap,
10a265b03bSAlexander Monakov .get_voltage_sel = regulator_get_voltage_sel_regmap,
11a265b03bSAlexander Monakov .list_voltage = regulator_list_voltage_linear_range,
12a265b03bSAlexander Monakov };
13a265b03bSAlexander Monakov
1460ab7f41SMatti Vaittinen static const struct linear_range pg86x_buck1_ranges[] = {
15a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE( 0, 0, 10, 0),
16a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
17a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
18a265b03bSAlexander Monakov };
19a265b03bSAlexander Monakov
2060ab7f41SMatti Vaittinen static const struct linear_range pg86x_buck2_ranges[] = {
21a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE( 0, 0, 15, 0),
22a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
23a265b03bSAlexander Monakov REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
24a265b03bSAlexander Monakov };
25a265b03bSAlexander Monakov
26a265b03bSAlexander Monakov static const struct regulator_desc pg86x_regulators[] = {
27a265b03bSAlexander Monakov {
28a265b03bSAlexander Monakov .id = 0,
29a265b03bSAlexander Monakov .type = REGULATOR_VOLTAGE,
30a265b03bSAlexander Monakov .name = "buck1",
31a265b03bSAlexander Monakov .of_match = of_match_ptr("buck1"),
32a265b03bSAlexander Monakov .n_voltages = 11 + 24 + 13,
33a265b03bSAlexander Monakov .linear_ranges = pg86x_buck1_ranges,
34a265b03bSAlexander Monakov .n_linear_ranges = 3,
35a265b03bSAlexander Monakov .vsel_reg = 0x24,
36a265b03bSAlexander Monakov .vsel_mask = 0xff,
37a265b03bSAlexander Monakov .ops = &pg86x_ops,
38a265b03bSAlexander Monakov .owner = THIS_MODULE
39a265b03bSAlexander Monakov },
40a265b03bSAlexander Monakov {
41a265b03bSAlexander Monakov .id = 1,
42a265b03bSAlexander Monakov .type = REGULATOR_VOLTAGE,
43a265b03bSAlexander Monakov .name = "buck2",
44a265b03bSAlexander Monakov .of_match = of_match_ptr("buck2"),
45a265b03bSAlexander Monakov .n_voltages = 16 + 24 + 13,
46a265b03bSAlexander Monakov .linear_ranges = pg86x_buck2_ranges,
47a265b03bSAlexander Monakov .n_linear_ranges = 3,
48a265b03bSAlexander Monakov .vsel_reg = 0x13,
49a265b03bSAlexander Monakov .vsel_mask = 0xff,
50a265b03bSAlexander Monakov .ops = &pg86x_ops,
51a265b03bSAlexander Monakov .owner = THIS_MODULE
52a265b03bSAlexander Monakov },
53a265b03bSAlexander Monakov };
54a265b03bSAlexander Monakov
55a265b03bSAlexander Monakov static const struct regmap_config pg86x_regmap = {
56a265b03bSAlexander Monakov .reg_bits = 8,
57a265b03bSAlexander Monakov .val_bits = 8,
58a265b03bSAlexander Monakov };
59a265b03bSAlexander Monakov
pg86x_i2c_probe(struct i2c_client * i2c)60a265b03bSAlexander Monakov static int pg86x_i2c_probe(struct i2c_client *i2c)
61a265b03bSAlexander Monakov {
62a265b03bSAlexander Monakov int id, ret;
63a265b03bSAlexander Monakov struct regulator_config config = {.dev = &i2c->dev};
64a265b03bSAlexander Monakov struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
65a265b03bSAlexander Monakov
66a265b03bSAlexander Monakov if (IS_ERR(regmap)) {
67a265b03bSAlexander Monakov ret = PTR_ERR(regmap);
68a265b03bSAlexander Monakov dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
69a265b03bSAlexander Monakov return ret;
70a265b03bSAlexander Monakov }
71a265b03bSAlexander Monakov
72a265b03bSAlexander Monakov for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
73a265b03bSAlexander Monakov struct regulator_dev *rdev;
74a265b03bSAlexander Monakov rdev = devm_regulator_register(&i2c->dev,
75a265b03bSAlexander Monakov &pg86x_regulators[id],
76a265b03bSAlexander Monakov &config);
77a265b03bSAlexander Monakov if (IS_ERR(rdev)) {
78a265b03bSAlexander Monakov ret = PTR_ERR(rdev);
79a265b03bSAlexander Monakov dev_err(&i2c->dev, "failed to register %s: %d\n",
80a265b03bSAlexander Monakov pg86x_regulators[id].name, ret);
81a265b03bSAlexander Monakov return ret;
82a265b03bSAlexander Monakov }
83a265b03bSAlexander Monakov }
84a265b03bSAlexander Monakov return 0;
85a265b03bSAlexander Monakov }
86a265b03bSAlexander Monakov
87e11e068cSJisheng Zhang static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
88a265b03bSAlexander Monakov { .compatible = "marvell,88pg867" },
89a265b03bSAlexander Monakov { .compatible = "marvell,88pg868" },
90a265b03bSAlexander Monakov { }
91a265b03bSAlexander Monakov };
92a265b03bSAlexander Monakov MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
93a265b03bSAlexander Monakov
94a265b03bSAlexander Monakov static const struct i2c_device_id pg86x_i2c_id[] = {
95a265b03bSAlexander Monakov { "88pg867", },
96a265b03bSAlexander Monakov { "88pg868", },
97a265b03bSAlexander Monakov { }
98a265b03bSAlexander Monakov };
99a265b03bSAlexander Monakov MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
100a265b03bSAlexander Monakov
101a265b03bSAlexander Monakov static struct i2c_driver pg86x_regulator_driver = {
102a265b03bSAlexander Monakov .driver = {
103a265b03bSAlexander Monakov .name = "88pg86x",
104ed6962ccSDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS,
105a265b03bSAlexander Monakov .of_match_table = of_match_ptr(pg86x_dt_ids),
106a265b03bSAlexander Monakov },
107*964e1865SUwe Kleine-König .probe = pg86x_i2c_probe,
108a265b03bSAlexander Monakov .id_table = pg86x_i2c_id,
109a265b03bSAlexander Monakov };
110a265b03bSAlexander Monakov
111a265b03bSAlexander Monakov module_i2c_driver(pg86x_regulator_driver);
112a265b03bSAlexander Monakov
113a265b03bSAlexander Monakov MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
114a265b03bSAlexander Monakov MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
115a265b03bSAlexander Monakov MODULE_LICENSE("GPL");
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