1/*
 2 * MFD driver for Active-semi ACT8945a PMIC
 3 *
 4 * Copyright (C) 2015 Atmel Corporation.
 5 *
 6 * Author: Wenyou Yang <wenyou.yang@atmel.com>
 7 *
 8 * This program is free software; you can redistribute it and/or modify it
 9 * under  the terms of the GNU General  Public License as published by the
10 * Free Software Foundation;  either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/i2c.h>
15#include <linux/mfd/core.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/regmap.h>
19
20static const struct mfd_cell act8945a_devs[] = {
21	{
22		.name = "act8945a-regulator",
23	},
24	{
25		.name = "act8945a-charger",
26		.of_compatible = "active-semi,act8945a-charger",
27	},
28};
29
30static const struct regmap_config act8945a_regmap_config = {
31	.reg_bits = 8,
32	.val_bits = 8,
33};
34
35static int act8945a_i2c_probe(struct i2c_client *i2c,
36			      const struct i2c_device_id *id)
37{
38	int ret;
39	struct regmap *regmap;
40
41	regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
42	if (IS_ERR(regmap)) {
43		ret = PTR_ERR(regmap);
44		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
45		return ret;
46	}
47
48	i2c_set_clientdata(i2c, regmap);
49
50	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
51				   act8945a_devs, ARRAY_SIZE(act8945a_devs),
52				   NULL, 0, NULL);
53	if (ret) {
54		dev_err(&i2c->dev, "Failed to add sub devices\n");
55		return ret;
56	}
57
58	return 0;
59}
60
61static const struct i2c_device_id act8945a_i2c_id[] = {
62	{ "act8945a", 0 },
63	{}
64};
65MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
66
67static const struct of_device_id act8945a_of_match[] = {
68	{ .compatible = "active-semi,act8945a", },
69	{},
70};
71MODULE_DEVICE_TABLE(of, act8945a_of_match);
72
73static struct i2c_driver act8945a_i2c_driver = {
74	.driver = {
75		   .name = "act8945a",
76		   .of_match_table = of_match_ptr(act8945a_of_match),
77	},
78	.probe = act8945a_i2c_probe,
79	.id_table = act8945a_i2c_id,
80};
81
82static int __init act8945a_i2c_init(void)
83{
84	return i2c_add_driver(&act8945a_i2c_driver);
85}
86subsys_initcall(act8945a_i2c_init);
87
88static void __exit act8945a_i2c_exit(void)
89{
90	i2c_del_driver(&act8945a_i2c_driver);
91}
92module_exit(act8945a_i2c_exit);
93
94MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
95MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
96MODULE_LICENSE("GPL");