1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <linux/module.h>
3*4882a593Smuzhiyun #include <linux/i2c.h>
4*4882a593Smuzhiyun #include <linux/of.h>
5*4882a593Smuzhiyun #include <linux/regulator/driver.h>
6*4882a593Smuzhiyun #include <linux/regmap.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun static const struct regulator_ops pg86x_ops = {
9*4882a593Smuzhiyun .set_voltage_sel = regulator_set_voltage_sel_regmap,
10*4882a593Smuzhiyun .get_voltage_sel = regulator_get_voltage_sel_regmap,
11*4882a593Smuzhiyun .list_voltage = regulator_list_voltage_linear_range,
12*4882a593Smuzhiyun };
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun static const struct linear_range pg86x_buck1_ranges[] = {
15*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE( 0, 0, 10, 0),
16*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
17*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
18*4882a593Smuzhiyun };
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun static const struct linear_range pg86x_buck2_ranges[] = {
21*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE( 0, 0, 15, 0),
22*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
23*4882a593Smuzhiyun REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static const struct regulator_desc pg86x_regulators[] = {
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun .id = 0,
29*4882a593Smuzhiyun .type = REGULATOR_VOLTAGE,
30*4882a593Smuzhiyun .name = "buck1",
31*4882a593Smuzhiyun .of_match = of_match_ptr("buck1"),
32*4882a593Smuzhiyun .n_voltages = 11 + 24 + 13,
33*4882a593Smuzhiyun .linear_ranges = pg86x_buck1_ranges,
34*4882a593Smuzhiyun .n_linear_ranges = 3,
35*4882a593Smuzhiyun .vsel_reg = 0x24,
36*4882a593Smuzhiyun .vsel_mask = 0xff,
37*4882a593Smuzhiyun .ops = &pg86x_ops,
38*4882a593Smuzhiyun .owner = THIS_MODULE
39*4882a593Smuzhiyun },
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun .id = 1,
42*4882a593Smuzhiyun .type = REGULATOR_VOLTAGE,
43*4882a593Smuzhiyun .name = "buck2",
44*4882a593Smuzhiyun .of_match = of_match_ptr("buck2"),
45*4882a593Smuzhiyun .n_voltages = 16 + 24 + 13,
46*4882a593Smuzhiyun .linear_ranges = pg86x_buck2_ranges,
47*4882a593Smuzhiyun .n_linear_ranges = 3,
48*4882a593Smuzhiyun .vsel_reg = 0x13,
49*4882a593Smuzhiyun .vsel_mask = 0xff,
50*4882a593Smuzhiyun .ops = &pg86x_ops,
51*4882a593Smuzhiyun .owner = THIS_MODULE
52*4882a593Smuzhiyun },
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static const struct regmap_config pg86x_regmap = {
56*4882a593Smuzhiyun .reg_bits = 8,
57*4882a593Smuzhiyun .val_bits = 8,
58*4882a593Smuzhiyun };
59*4882a593Smuzhiyun
pg86x_i2c_probe(struct i2c_client * i2c)60*4882a593Smuzhiyun static int pg86x_i2c_probe(struct i2c_client *i2c)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun int id, ret;
63*4882a593Smuzhiyun struct regulator_config config = {.dev = &i2c->dev};
64*4882a593Smuzhiyun struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun if (IS_ERR(regmap)) {
67*4882a593Smuzhiyun ret = PTR_ERR(regmap);
68*4882a593Smuzhiyun dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
69*4882a593Smuzhiyun return ret;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
73*4882a593Smuzhiyun struct regulator_dev *rdev;
74*4882a593Smuzhiyun rdev = devm_regulator_register(&i2c->dev,
75*4882a593Smuzhiyun &pg86x_regulators[id],
76*4882a593Smuzhiyun &config);
77*4882a593Smuzhiyun if (IS_ERR(rdev)) {
78*4882a593Smuzhiyun ret = PTR_ERR(rdev);
79*4882a593Smuzhiyun dev_err(&i2c->dev, "failed to register %s: %d\n",
80*4882a593Smuzhiyun pg86x_regulators[id].name, ret);
81*4882a593Smuzhiyun return ret;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun return 0;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun static const struct of_device_id __maybe_unused pg86x_dt_ids[] = {
88*4882a593Smuzhiyun { .compatible = "marvell,88pg867" },
89*4882a593Smuzhiyun { .compatible = "marvell,88pg868" },
90*4882a593Smuzhiyun { }
91*4882a593Smuzhiyun };
92*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun static const struct i2c_device_id pg86x_i2c_id[] = {
95*4882a593Smuzhiyun { "88pg867", },
96*4882a593Smuzhiyun { "88pg868", },
97*4882a593Smuzhiyun { }
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun static struct i2c_driver pg86x_regulator_driver = {
102*4882a593Smuzhiyun .driver = {
103*4882a593Smuzhiyun .name = "88pg86x",
104*4882a593Smuzhiyun .of_match_table = of_match_ptr(pg86x_dt_ids),
105*4882a593Smuzhiyun },
106*4882a593Smuzhiyun .probe_new = pg86x_i2c_probe,
107*4882a593Smuzhiyun .id_table = pg86x_i2c_id,
108*4882a593Smuzhiyun };
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun module_i2c_driver(pg86x_regulator_driver);
111*4882a593Smuzhiyun
112*4882a593Smuzhiyun MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
113*4882a593Smuzhiyun MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
114*4882a593Smuzhiyun MODULE_LICENSE("GPL");
115