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
16static 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
26static const struct regmap_config act8945a_regmap_config = {
27	.reg_bits = 8,
28	.val_bits = 8,
29};
30
31static 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
56static const struct i2c_device_id act8945a_i2c_id[] = {
57	{ "act8945a", 0 },
58	{}
59};
60MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
61
62static const struct of_device_id act8945a_of_match[] = {
63	{ .compatible = "active-semi,act8945a", },
64	{},
65};
66MODULE_DEVICE_TABLE(of, act8945a_of_match);
67
68static 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
77static int __init act8945a_i2c_init(void)
78{
79	return i2c_add_driver(&act8945a_i2c_driver);
80}
81subsys_initcall(act8945a_i2c_init);
82
83static void __exit act8945a_i2c_exit(void)
84{
85	i2c_del_driver(&act8945a_i2c_driver);
86}
87module_exit(act8945a_i2c_exit);
88
89MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
90MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
91MODULE_LICENSE("GPL");
92