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_device.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			      const struct i2c_device_id *id)
33{
34	int ret;
35	struct regmap *regmap;
36
37	regmap = devm_regmap_init_i2c(i2c, &act8945a_regmap_config);
38	if (IS_ERR(regmap)) {
39		ret = PTR_ERR(regmap);
40		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
41		return ret;
42	}
43
44	i2c_set_clientdata(i2c, regmap);
45
46	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_NONE,
47				   act8945a_devs, ARRAY_SIZE(act8945a_devs),
48				   NULL, 0, NULL);
49	if (ret) {
50		dev_err(&i2c->dev, "Failed to add sub devices\n");
51		return ret;
52	}
53
54	return 0;
55}
56
57static const struct i2c_device_id act8945a_i2c_id[] = {
58	{ "act8945a", 0 },
59	{}
60};
61MODULE_DEVICE_TABLE(i2c, act8945a_i2c_id);
62
63static const struct of_device_id act8945a_of_match[] = {
64	{ .compatible = "active-semi,act8945a", },
65	{},
66};
67MODULE_DEVICE_TABLE(of, act8945a_of_match);
68
69static struct i2c_driver act8945a_i2c_driver = {
70	.driver = {
71		   .name = "act8945a",
72		   .of_match_table = of_match_ptr(act8945a_of_match),
73	},
74	.probe = act8945a_i2c_probe,
75	.id_table = act8945a_i2c_id,
76};
77
78static int __init act8945a_i2c_init(void)
79{
80	return i2c_add_driver(&act8945a_i2c_driver);
81}
82subsys_initcall(act8945a_i2c_init);
83
84static void __exit act8945a_i2c_exit(void)
85{
86	i2c_del_driver(&act8945a_i2c_driver);
87}
88module_exit(act8945a_i2c_exit);
89
90MODULE_DESCRIPTION("ACT8945A PMIC multi-function driver");
91MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
92MODULE_LICENSE("GPL");