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caab277b | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2698dc22 GY |
2 | /* |
3 | * sky81452.c SKY81452 MFD driver | |
4 | * | |
5 | * Copyright 2014 Skyworks Solutions Inc. | |
6 | * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com> | |
2698dc22 GY |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/i2c.h> | |
15 | #include <linux/regmap.h> | |
16 | #include <linux/mfd/core.h> | |
17 | #include <linux/mfd/sky81452.h> | |
18 | ||
19 | static const struct regmap_config sky81452_config = { | |
20 | .reg_bits = 8, | |
21 | .val_bits = 8, | |
22 | }; | |
23 | ||
24 | static int sky81452_probe(struct i2c_client *client, | |
25 | const struct i2c_device_id *id) | |
26 | { | |
27 | struct device *dev = &client->dev; | |
28 | const struct sky81452_platform_data *pdata = dev_get_platdata(dev); | |
29 | struct mfd_cell cells[2]; | |
30 | struct regmap *regmap; | |
31 | int ret; | |
32 | ||
33 | if (!pdata) { | |
34 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
35 | if (!pdata) | |
36 | return -ENOMEM; | |
37 | } | |
38 | ||
39 | regmap = devm_regmap_init_i2c(client, &sky81452_config); | |
40 | if (IS_ERR(regmap)) { | |
41 | dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap)); | |
42 | return PTR_ERR(regmap); | |
43 | } | |
44 | ||
45 | i2c_set_clientdata(client, regmap); | |
46 | ||
47 | memset(cells, 0, sizeof(cells)); | |
48 | cells[0].name = "sky81452-backlight"; | |
49 | cells[0].of_compatible = "skyworks,sky81452-backlight"; | |
2698dc22 GY |
50 | cells[1].name = "sky81452-regulator"; |
51 | cells[1].platform_data = pdata->regulator_init_data; | |
52 | cells[1].pdata_size = sizeof(*pdata->regulator_init_data); | |
53 | ||
69633bea LD |
54 | ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells), |
55 | NULL, 0, NULL); | |
2698dc22 GY |
56 | if (ret) |
57 | dev_err(dev, "failed to add child devices. err=%d\n", ret); | |
58 | ||
59 | return ret; | |
60 | } | |
61 | ||
2698dc22 GY |
62 | static const struct i2c_device_id sky81452_ids[] = { |
63 | { "sky81452" }, | |
64 | { } | |
65 | }; | |
66 | MODULE_DEVICE_TABLE(i2c, sky81452_ids); | |
67 | ||
68 | #ifdef CONFIG_OF | |
69 | static const struct of_device_id sky81452_of_match[] = { | |
70 | { .compatible = "skyworks,sky81452", }, | |
71 | { } | |
72 | }; | |
73 | MODULE_DEVICE_TABLE(of, sky81452_of_match); | |
74 | #endif | |
75 | ||
76 | static struct i2c_driver sky81452_driver = { | |
77 | .driver = { | |
78 | .name = "sky81452", | |
79 | .of_match_table = of_match_ptr(sky81452_of_match), | |
80 | }, | |
81 | .probe = sky81452_probe, | |
2698dc22 GY |
82 | .id_table = sky81452_ids, |
83 | }; | |
84 | ||
85 | module_i2c_driver(sky81452_driver); | |
86 | ||
87 | MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver"); | |
88 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); | |
89 | MODULE_LICENSE("GPL v2"); |