blob: d2ecc2435736a015a006e279f93d61e0007560e8 [file] [log] [blame]
Matti Aaltonen383268a2010-12-10 11:41:33 -03001/*
2 * MFD driver for wl1273 FM radio and audio codec submodules.
3 *
4 * Copyright (C) 2010 Nokia Corporation
5 * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * 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
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 *
21 */
22
23#include <linux/mfd/wl1273-core.h>
24#include <linux/slab.h>
25
26#define DRIVER_DESC "WL1273 FM Radio Core"
27
28static struct i2c_device_id wl1273_driver_id_table[] = {
29 { WL1273_FM_DRIVER_NAME, 0 },
30 { }
31};
32MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
33
34static int wl1273_core_remove(struct i2c_client *client)
35{
36 struct wl1273_core *core = i2c_get_clientdata(client);
37
38 dev_dbg(&client->dev, "%s\n", __func__);
39
40 mfd_remove_devices(&client->dev);
41 i2c_set_clientdata(client, NULL);
42 kfree(core);
43
44 return 0;
45}
46
47static int __devinit wl1273_core_probe(struct i2c_client *client,
48 const struct i2c_device_id *id)
49{
50 struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
51 struct wl1273_core *core;
52 struct mfd_cell *cell;
53 int children = 0;
54 int r = 0;
55
56 dev_dbg(&client->dev, "%s\n", __func__);
57
58 if (!pdata) {
59 dev_err(&client->dev, "No platform data.\n");
60 return -EINVAL;
61 }
62
63 if (!(pdata->children & WL1273_RADIO_CHILD)) {
64 dev_err(&client->dev, "Cannot function without radio child.\n");
65 return -EINVAL;
66 }
67
68 core = kzalloc(sizeof(*core), GFP_KERNEL);
69 if (!core)
70 return -ENOMEM;
71
72 core->pdata = pdata;
73 core->client = client;
74 mutex_init(&core->lock);
75
76 i2c_set_clientdata(client, core);
77
78 dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
79
80 cell = &core->cells[children];
81 cell->name = "wl1273_fm_radio";
82 cell->platform_data = &core;
83 cell->data_size = sizeof(core);
84 children++;
85
86 if (pdata->children & WL1273_CODEC_CHILD) {
87 cell = &core->cells[children];
88
89 dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
90 cell->name = "wl1273-codec";
91 cell->platform_data = &core;
92 cell->data_size = sizeof(core);
93 children++;
94 }
95
96 dev_dbg(&client->dev, "%s: number of children: %d.\n",
97 __func__, children);
98
99 r = mfd_add_devices(&client->dev, -1, core->cells,
100 children, NULL, 0);
101 if (r)
102 goto err;
103
104 return 0;
105
106err:
107 i2c_set_clientdata(client, NULL);
108 pdata->free_resources();
109 kfree(core);
110
111 dev_dbg(&client->dev, "%s\n", __func__);
112
113 return r;
114}
115
116static struct i2c_driver wl1273_core_driver = {
117 .driver = {
118 .name = WL1273_FM_DRIVER_NAME,
119 },
120 .probe = wl1273_core_probe,
121 .id_table = wl1273_driver_id_table,
122 .remove = __devexit_p(wl1273_core_remove),
123};
124
125static int __init wl1273_core_init(void)
126{
127 int r;
128
129 r = i2c_add_driver(&wl1273_core_driver);
130 if (r) {
131 pr_err(WL1273_FM_DRIVER_NAME
132 ": driver registration failed\n");
133 return r;
134 }
135
136 return r;
137}
138
139static void __exit wl1273_core_exit(void)
140{
141 i2c_del_driver(&wl1273_core_driver);
142}
143late_initcall(wl1273_core_init);
144module_exit(wl1273_core_exit);
145
146MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
147MODULE_DESCRIPTION(DRIVER_DESC);
148MODULE_LICENSE("GPL");