| /* |
| * Linux driver model AC97 bus interface |
| * |
| * Author: Nicolas Pitre |
| * Created: Jan 14, 2005 |
| * Copyright: (C) MontaVista Software Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/string.h> |
| |
| /* |
| * Let drivers decide whether they want to support given codec from their |
| * probe method. Drivers have direct access to the struct snd_ac97 structure and may |
| * decide based on the id field amongst other things. |
| */ |
| static int ac97_bus_match(struct device *dev, struct device_driver *drv) |
| { |
| return 1; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ac97_bus_suspend(struct device *dev, pm_message_t state) |
| { |
| int ret = 0; |
| |
| if (dev->driver && dev->driver->suspend) |
| ret = dev->driver->suspend(dev, state); |
| |
| return ret; |
| } |
| |
| static int ac97_bus_resume(struct device *dev) |
| { |
| int ret = 0; |
| |
| if (dev->driver && dev->driver->resume) |
| ret = dev->driver->resume(dev); |
| |
| return ret; |
| } |
| #endif /* CONFIG_PM */ |
| |
| struct bus_type ac97_bus_type = { |
| .name = "ac97", |
| .match = ac97_bus_match, |
| #ifdef CONFIG_PM |
| .suspend = ac97_bus_suspend, |
| .resume = ac97_bus_resume, |
| #endif /* CONFIG_PM */ |
| }; |
| |
| static int __init ac97_bus_init(void) |
| { |
| return bus_register(&ac97_bus_type); |
| } |
| |
| subsys_initcall(ac97_bus_init); |
| |
| static void __exit ac97_bus_exit(void) |
| { |
| bus_unregister(&ac97_bus_type); |
| } |
| |
| module_exit(ac97_bus_exit); |
| |
| EXPORT_SYMBOL(ac97_bus_type); |
| |
| MODULE_LICENSE("GPL"); |