1/*
2 * sky81452.c SKY81452 MFD driver
3 *
4 * Copyright 2014 Skyworks Solutions Inc.
5 * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/err.h>
24#include <linux/slab.h>
25#include <linux/i2c.h>
26#include <linux/regmap.h>
27#include <linux/mfd/core.h>
28#include <linux/mfd/sky81452.h>
29
30static const struct regmap_config sky81452_config = {
31 .reg_bits = 8,
32 .val_bits = 8,
33};
34
35static int sky81452_probe(struct i2c_client *client,
36 const struct i2c_device_id *id)
37{
38 struct device *dev = &client->dev;
39 const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
40 struct mfd_cell cells[2];
41 struct regmap *regmap;
42 int ret;
43
44 if (!pdata) {
45 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
46 if (!pdata)
47 return -ENOMEM;
48 }
49
50 regmap = devm_regmap_init_i2c(client, &sky81452_config);
51 if (IS_ERR(regmap)) {
52 dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
53 return PTR_ERR(regmap);
54 }
55
56 i2c_set_clientdata(client, regmap);
57
58 memset(cells, 0, sizeof(cells));
59 cells[0].name = "sky81452-backlight";
60 cells[0].of_compatible = "skyworks,sky81452-backlight";
61 cells[0].platform_data = pdata->bl_pdata;
62 cells[0].pdata_size = sizeof(*pdata->bl_pdata);
63 cells[1].name = "sky81452-regulator";
64 cells[1].platform_data = pdata->regulator_init_data;
65 cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
66
67 ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
68 NULL, 0, NULL);
69 if (ret)
70 dev_err(dev, "failed to add child devices. err=%d\n", ret);
71
72 return ret;
73}
74
75static const struct i2c_device_id sky81452_ids[] = {
76 { "sky81452" },
77 { }
78};
79MODULE_DEVICE_TABLE(i2c, sky81452_ids);
80
81#ifdef CONFIG_OF
82static const struct of_device_id sky81452_of_match[] = {
83 { .compatible = "skyworks,sky81452", },
84 { }
85};
86MODULE_DEVICE_TABLE(of, sky81452_of_match);
87#endif
88
89static struct i2c_driver sky81452_driver = {
90 .driver = {
91 .name = "sky81452",
92 .of_match_table = of_match_ptr(sky81452_of_match),
93 },
94 .probe = sky81452_probe,
95 .id_table = sky81452_ids,
96};
97
98module_i2c_driver(sky81452_driver);
99
100MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
101MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
102MODULE_LICENSE("GPL v2");
103