1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * MFD driver for Active-semi ACT8945a PMIC
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2015 Atmel Corporation.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: Wenyou Yang <wenyou.yang@atmel.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/i2c.h>
11*4882a593Smuzhiyun #include <linux/mfd/core.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/of_device.h>
14*4882a593Smuzhiyun #include <linux/regmap.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun static const struct mfd_cell act8945a_devs[] = {
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun .name = "act8945a-regulator",
19*4882a593Smuzhiyun },
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun .name = "act8945a-charger",
22*4882a593Smuzhiyun .of_compatible = "active-semi,act8945a-charger",
23*4882a593Smuzhiyun },
24*4882a593Smuzhiyun };
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun static const struct regmap_config act8945a_regmap_config = {
27*4882a593Smuzhiyun .reg_bits = 8,
28*4882a593Smuzhiyun .val_bits = 8,
29*4882a593Smuzhiyun };
30*4882a593Smuzhiyun
act8945a_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)31*4882a593Smuzhiyun static int act8945a_i2c_probe(struct i2c_client *i2c,
32*4882a593Smuzhiyun const struct i2c_device_id *id)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun int ret;
35*4882a593Smuzhiyun struct regmap *regmap;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
38*4882a593Smuzhiyun if (IS_ERR(regmap)) {
39*4882a593Smuzhiyun ret = PTR_ERR(regmap);
40*4882a593Smuzhiyun dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
41*4882a593Smuzhiyun return ret;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun i2c_set_clientdata(i2c, regmap);
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
47*4882a593Smuzhiyun act8945a_devs, ARRAY_SIZE(act8945a_devs),
48*4882a593Smuzhiyun NULL, 0, NULL);
49*4882a593Smuzhiyun if (ret) {
50*4882a593Smuzhiyun dev_err(&i2c->dev, "Failed to add sub devices\n");
51*4882a593Smuzhiyun return ret;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun return 0;
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun static const struct i2c_device_id act8945a_i2c_id[] = {
58*4882a593Smuzhiyun { "act8945a", 0 },
59*4882a593Smuzhiyun {}
60*4882a593Smuzhiyun };
61*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun static const struct of_device_id act8945a_of_match[] = {
64*4882a593Smuzhiyun { .compatible = "active-semi,act8945a", },
65*4882a593Smuzhiyun {},
66*4882a593Smuzhiyun };
67*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, act8945a_of_match);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun static struct i2c_driver act8945a_i2c_driver = {
70*4882a593Smuzhiyun .driver = {
71*4882a593Smuzhiyun .name = "act8945a",
72*4882a593Smuzhiyun .of_match_table = of_match_ptr(act8945a_of_match),
73*4882a593Smuzhiyun },
74*4882a593Smuzhiyun .probe = act8945a_i2c_probe,
75*4882a593Smuzhiyun .id_table = act8945a_i2c_id,
76*4882a593Smuzhiyun };
77*4882a593Smuzhiyun
act8945a_i2c_init(void)78*4882a593Smuzhiyun static int __init act8945a_i2c_init(void)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun return i2c_add_driver(&act8945a_i2c_driver);
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun subsys_initcall(act8945a_i2c_init);
83*4882a593Smuzhiyun
act8945a_i2c_exit(void)84*4882a593Smuzhiyun static void __exit act8945a_i2c_exit(void)
85*4882a593Smuzhiyun {
86*4882a593Smuzhiyun i2c_del_driver(&act8945a_i2c_driver);
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun module_exit(act8945a_i2c_exit);
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
91*4882a593Smuzhiyun MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
92*4882a593Smuzhiyun MODULE_LICENSE("GPL");
93