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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
30 static const struct regmap_config sky81452_config = {
31         .reg_bits = 8,
32         .val_bits = 8,
33 };
34
35 static 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
75 static const struct i2c_device_id sky81452_ids[] = {
76         { "sky81452" },
77         { }
78 };
79 MODULE_DEVICE_TABLE(i2c, sky81452_ids);
80
81 #ifdef CONFIG_OF
82 static const struct of_device_id sky81452_of_match[] = {
83         { .compatible = "skyworks,sky81452", },
84         { }
85 };
86 MODULE_DEVICE_TABLE(of, sky81452_of_match);
87 #endif
88
89 static 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
98 module_i2c_driver(sky81452_driver);
99
100 MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
101 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
102 MODULE_LICENSE("GPL v2");