1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * MP2629 parent driver for ADC and battery charger
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2020 Monolithic Power Systems, Inc
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: Saravanan Sekar <sravanhome@gmail.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/i2c.h>
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/mfd/core.h>
13*4882a593Smuzhiyun #include <linux/mfd/mp2629.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/platform_device.h>
16*4882a593Smuzhiyun #include <linux/regmap.h>
17*4882a593Smuzhiyun #include <linux/slab.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct mfd_cell mp2629_cell[] = {
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun .name = "mp2629_adc",
22*4882a593Smuzhiyun .of_compatible = "mps,mp2629_adc",
23*4882a593Smuzhiyun },
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun .name = "mp2629_charger",
26*4882a593Smuzhiyun .of_compatible = "mps,mp2629_charger",
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun };
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun static const struct regmap_config mp2629_regmap_config = {
31*4882a593Smuzhiyun .reg_bits = 8,
32*4882a593Smuzhiyun .val_bits = 8,
33*4882a593Smuzhiyun .max_register = 0x17,
34*4882a593Smuzhiyun };
35*4882a593Smuzhiyun
mp2629_probe(struct i2c_client * client)36*4882a593Smuzhiyun static int mp2629_probe(struct i2c_client *client)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct mp2629_data *ddata;
39*4882a593Smuzhiyun int ret;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
42*4882a593Smuzhiyun if (!ddata)
43*4882a593Smuzhiyun return -ENOMEM;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun ddata->dev = &client->dev;
46*4882a593Smuzhiyun i2c_set_clientdata(client, ddata);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
49*4882a593Smuzhiyun if (IS_ERR(ddata->regmap)) {
50*4882a593Smuzhiyun dev_err(ddata->dev, "Failed to allocate regmap\n");
51*4882a593Smuzhiyun return PTR_ERR(ddata->regmap);
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
55*4882a593Smuzhiyun ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
56*4882a593Smuzhiyun if (ret)
57*4882a593Smuzhiyun dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return ret;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun static const struct of_device_id mp2629_of_match[] = {
63*4882a593Smuzhiyun { .compatible = "mps,mp2629"},
64*4882a593Smuzhiyun { }
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, mp2629_of_match);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun static struct i2c_driver mp2629_driver = {
69*4882a593Smuzhiyun .driver = {
70*4882a593Smuzhiyun .name = "mp2629",
71*4882a593Smuzhiyun .of_match_table = mp2629_of_match,
72*4882a593Smuzhiyun },
73*4882a593Smuzhiyun .probe_new = mp2629_probe,
74*4882a593Smuzhiyun };
75*4882a593Smuzhiyun module_i2c_driver(mp2629_driver);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
78*4882a593Smuzhiyun MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
79*4882a593Smuzhiyun MODULE_LICENSE("GPL");
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