1  // SPDX-License-Identifier: GPL-2.0+
2  /*
3   * MP2629 parent driver for ADC and battery charger
4   *
5   * Copyright 2020 Monolithic Power Systems, Inc
6   *
7   * Author: Saravanan Sekar <sravanhome@gmail.com>
8   */
9  
10  #include <linux/i2c.h>
11  #include <linux/kernel.h>
12  #include <linux/mfd/core.h>
13  #include <linux/mfd/mp2629.h>
14  #include <linux/module.h>
15  #include <linux/platform_device.h>
16  #include <linux/regmap.h>
17  #include <linux/slab.h>
18  
19  static const struct mfd_cell mp2629_cell[] = {
20  	{
21  		.name = "mp2629_adc",
22  		.of_compatible = "mps,mp2629_adc",
23  	},
24  	{
25  		.name = "mp2629_charger",
26  		.of_compatible = "mps,mp2629_charger",
27  	}
28  };
29  
30  static const struct regmap_config mp2629_regmap_config = {
31  	.reg_bits = 8,
32  	.val_bits = 8,
33  	.max_register = 0x17,
34  };
35  
mp2629_probe(struct i2c_client * client)36  static int mp2629_probe(struct i2c_client *client)
37  {
38  	struct mp2629_data *ddata;
39  	int ret;
40  
41  	ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
42  	if (!ddata)
43  		return -ENOMEM;
44  
45  	ddata->dev = &client->dev;
46  	i2c_set_clientdata(client, ddata);
47  
48  	ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
49  	if (IS_ERR(ddata->regmap)) {
50  		dev_err(ddata->dev, "Failed to allocate regmap\n");
51  		return PTR_ERR(ddata->regmap);
52  	}
53  
54  	ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
55  				   ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
56  	if (ret)
57  		dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
58  
59  	return ret;
60  }
61  
62  static const struct of_device_id mp2629_of_match[] = {
63  	{ .compatible = "mps,mp2629"},
64  	{ }
65  };
66  MODULE_DEVICE_TABLE(of, mp2629_of_match);
67  
68  static struct i2c_driver mp2629_driver = {
69  	.driver = {
70  		.name = "mp2629",
71  		.of_match_table = mp2629_of_match,
72  	},
73  	.probe		= mp2629_probe,
74  };
75  module_i2c_driver(mp2629_driver);
76  
77  MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
78  MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
79  MODULE_LICENSE("GPL");
80