tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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
19static const struct regmap_config sky81452_config = {
20 .reg_bits = 8,
21 .val_bits = 8,
22};
23
24static 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";
50 cells[0].platform_data = pdata->bl_pdata;
51 cells[0].pdata_size = sizeof(*pdata->bl_pdata);
52 cells[1].name = "sky81452-regulator";
53 cells[1].platform_data = pdata->regulator_init_data;
54 cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
55
56 ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
57 NULL, 0, NULL);
58 if (ret)
59 dev_err(dev, "failed to add child devices. err=%d\n", ret);
60
61 return ret;
62}
63
64static const struct i2c_device_id sky81452_ids[] = {
65 { "sky81452" },
66 { }
67};
68MODULE_DEVICE_TABLE(i2c, sky81452_ids);
69
70#ifdef CONFIG_OF
71static const struct of_device_id sky81452_of_match[] = {
72 { .compatible = "skyworks,sky81452", },
73 { }
74};
75MODULE_DEVICE_TABLE(of, sky81452_of_match);
76#endif
77
78static struct i2c_driver sky81452_driver = {
79 .driver = {
80 .name = "sky81452",
81 .of_match_table = of_match_ptr(sky81452_of_match),
82 },
83 .probe = sky81452_probe,
84 .id_table = sky81452_ids,
85};
86
87module_i2c_driver(sky81452_driver);
88
89MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
90MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
91MODULE_LICENSE("GPL v2");