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 | |
36 | static int mp2629_probe(struct i2c_client *client) |
37 | { |
38 | struct mp2629_data *ddata; |
39 | int ret; |
40 | |
41 | ddata = devm_kzalloc(dev: &client->dev, size: sizeof(*ddata), GFP_KERNEL); |
42 | if (!ddata) |
43 | return -ENOMEM; |
44 | |
45 | ddata->dev = &client->dev; |
46 | i2c_set_clientdata(client, data: ddata); |
47 | |
48 | ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config); |
49 | if (IS_ERR(ptr: ddata->regmap)) { |
50 | dev_err(ddata->dev, "Failed to allocate regmap\n" ); |
51 | return PTR_ERR(ptr: ddata->regmap); |
52 | } |
53 | |
54 | ret = devm_mfd_add_devices(dev: ddata->dev, PLATFORM_DEVID_AUTO, cells: mp2629_cell, |
55 | ARRAY_SIZE(mp2629_cell), NULL, irq_base: 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 | |