2 * Linux driver model AC97 bus interface
4 * Author: Nicolas Pitre
5 * Created: Jan 14, 2005
6 * Copyright: (C) MontaVista Software Inc.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/device.h>
17 #include <linux/string.h>
18 #include <sound/ac97_codec.h>
21 * Let drivers decide whether they want to support given codec from their
22 * probe method. Drivers have direct access to the struct snd_ac97
23 * structure and may decide based on the id field amongst other things.
25 static int ac97_bus_match(struct device
*dev
, struct device_driver
*drv
)
31 static int ac97_bus_suspend(struct device
*dev
, pm_message_t state
)
35 if (dev
->driver
&& dev
->driver
->suspend
)
36 ret
= dev
->driver
->suspend(dev
, state
);
41 static int ac97_bus_resume(struct device
*dev
)
45 if (dev
->driver
&& dev
->driver
->resume
)
46 ret
= dev
->driver
->resume(dev
);
50 #endif /* CONFIG_PM */
52 struct bus_type ac97_bus_type
= {
54 .match
= ac97_bus_match
,
56 .suspend
= ac97_bus_suspend
,
57 .resume
= ac97_bus_resume
,
58 #endif /* CONFIG_PM */
61 static int __init
ac97_bus_init(void)
63 return bus_register(&ac97_bus_type
);
66 subsys_initcall(ac97_bus_init
);
68 static void __exit
ac97_bus_exit(void)
70 bus_unregister(&ac97_bus_type
);
73 module_exit(ac97_bus_exit
);
75 EXPORT_SYMBOL(ac97_bus_type
);
77 MODULE_LICENSE("GPL");
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