USB: fix compile problems in ehci-hcd
[linux-2.6/mini2440.git] / sound / ac97_bus.c
blob7fa37e15f1961b8c6b48834bc4886c403bcb568c
1 /*
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>
20 * Let drivers decide whether they want to support given codec from their
21 * probe method. Drivers have direct access to the struct snd_ac97 structure and may
22 * decide based on the id field amongst other things.
24 static int ac97_bus_match(struct device *dev, struct device_driver *drv)
26 return 1;
29 #ifdef CONFIG_PM
30 static int ac97_bus_suspend(struct device *dev, pm_message_t state)
32 int ret = 0;
34 if (dev->driver && dev->driver->suspend)
35 ret = dev->driver->suspend(dev, state);
37 return ret;
40 static int ac97_bus_resume(struct device *dev)
42 int ret = 0;
44 if (dev->driver && dev->driver->resume)
45 ret = dev->driver->resume(dev);
47 return ret;
49 #endif /* CONFIG_PM */
51 struct bus_type ac97_bus_type = {
52 .name = "ac97",
53 .match = ac97_bus_match,
54 #ifdef CONFIG_PM
55 .suspend = ac97_bus_suspend,
56 .resume = ac97_bus_resume,
57 #endif /* CONFIG_PM */
60 static int __init ac97_bus_init(void)
62 return bus_register(&ac97_bus_type);
65 subsys_initcall(ac97_bus_init);
67 static void __exit ac97_bus_exit(void)
69 bus_unregister(&ac97_bus_type);
72 module_exit(ac97_bus_exit);
74 EXPORT_SYMBOL(ac97_bus_type);
76 MODULE_LICENSE("GPL");