1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * MFD driver for Active-semi ACT8945a PMIC
4 *
5 * Copyright (C) 2015 Atmel Corporation.
6 *
7 * Author: Wenyou Yang <wenyou.yang@atmel.com>
8 */
9
10 #include <linux/i2c.h>
11 #include <linux/mfd/core.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/regmap.h>
15
16 static const struct mfd_cell act8945a_devs[] = {
17 {
18 .name = "act8945a-regulator",
19 },
20 {
21 .name = "act8945a-charger",
22 .of_compatible = "active-semi,act8945a-charger",
23 },
24 };
25
26 static const struct regmap_config act8945a_regmap_config = {
27 .reg_bits = 8,
28 .val_bits = 8,
29 };
30
act8945a_i2c_probe(struct i2c_client * i2c)31 static int act8945a_i2c_probe(struct i2c_client *i2c)
32 {
33 int ret;
34 struct regmap *regmap;
35
36 regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
37 if (IS_ERR(regmap)) {
38 ret = PTR_ERR(regmap);
39 dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
40 return ret;
41 }
42
43 i2c_set_clientdata(i2c, regmap);
44
45 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
46 act8945a_devs, ARRAY_SIZE(act8945a_devs),
47 NULL, 0, NULL);
48 if (ret) {
49 dev_err(&i2c->dev, "Failed to add sub devices\n");
50 return ret;
51 }
52
53 return 0;
54 }
55
56 static const struct i2c_device_id act8945a_i2c_id[] = {
57 { "act8945a", 0 },
58 {}
59 };
60 MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
61
62 static const struct of_device_id act8945a_of_match[] = {
63 { .compatible = "active-semi,act8945a", },
64 {},
65 };
66 MODULE_DEVICE_TABLE(of, act8945a_of_match);
67
68 static struct i2c_driver act8945a_i2c_driver = {
69 .driver = {
70 .name = "act8945a",
71 .of_match_table = act8945a_of_match,
72 },
73 .probe = act8945a_i2c_probe,
74 .id_table = act8945a_i2c_id,
75 };
76
act8945a_i2c_init(void)77 static int __init act8945a_i2c_init(void)
78 {
79 return i2c_add_driver(&act8945a_i2c_driver);
80 }
81 subsys_initcall(act8945a_i2c_init);
82
act8945a_i2c_exit(void)83 static void __exit act8945a_i2c_exit(void)
84 {
85 i2c_del_driver(&act8945a_i2c_driver);
86 }
87 module_exit(act8945a_i2c_exit);
88
89 MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
90 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
91 MODULE_LICENSE("GPL");
92