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