1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* MFD driver for wl1273 FM radio and audio codec submodules.
*
* Copyright (C) 2010 Nokia Corporation
* Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/mfd/wl1273-core.h>
#include <linux/slab.h>
#define DRIVER_DESC "WL1273 FM Radio Core"
static struct i2c_device_id wl1273_driver_id_table[] = {
{ WL1273_FM_DRIVER_NAME, 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
static int wl1273_core_remove(struct i2c_client *client)
{
struct wl1273_core *core = i2c_get_clientdata(client);
dev_dbg(&client->dev, "%s\n", __func__);
mfd_remove_devices(&client->dev);
kfree(core);
return 0;
}
static int __devinit wl1273_core_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
struct wl1273_core *core;
struct mfd_cell *cell;
int children = 0;
int r = 0;
dev_dbg(&client->dev, "%s\n", __func__);
if (!pdata) {
dev_err(&client->dev, "No platform data.\n");
return -EINVAL;
}
if (!(pdata->children & WL1273_RADIO_CHILD)) {
dev_err(&client->dev, "Cannot function without radio child.\n");
return -EINVAL;
}
core = kzalloc(sizeof(*core), GFP_KERNEL);
if (!core)
return -ENOMEM;
core->pdata = pdata;
core->client = client;
mutex_init(&core->lock);
i2c_set_clientdata(client, core);
dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
cell = &core->cells[children];
cell->name = "wl1273_fm_radio";
cell->mfd_data = &core;
children++;
if (pdata->children & WL1273_CODEC_CHILD) {
cell = &core->cells[children];
dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
cell->name = "wl1273-codec";
cell->mfd_data = &core;
children++;
}
dev_dbg(&client->dev, "%s: number of children: %d.\n",
__func__, children);
r = mfd_add_devices(&client->dev, -1, core->cells,
children, NULL, 0);
if (r)
goto err;
return 0;
err:
pdata->free_resources();
kfree(core);
dev_dbg(&client->dev, "%s\n", __func__);
return r;
}
static struct i2c_driver wl1273_core_driver = {
.driver = {
.name = WL1273_FM_DRIVER_NAME,
},
.probe = wl1273_core_probe,
.id_table = wl1273_driver_id_table,
.remove = __devexit_p(wl1273_core_remove),
};
static int __init wl1273_core_init(void)
{
int r;
r = i2c_add_driver(&wl1273_core_driver);
if (r) {
pr_err(WL1273_FM_DRIVER_NAME
": driver registration failed\n");
return r;
}
return r;
}
static void __exit wl1273_core_exit(void)
{
i2c_del_driver(&wl1273_core_driver);
}
late_initcall(wl1273_core_init);
module_exit(wl1273_core_exit);
MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
|
