From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A9=20Fabian=20Silva=20Delgado?= Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- sound/ac97_bus.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 sound/ac97_bus.c (limited to 'sound/ac97_bus.c') diff --git a/sound/ac97_bus.c b/sound/ac97_bus.c new file mode 100644 index 000000000..2b50cbe6a --- /dev/null +++ b/sound/ac97_bus.c @@ -0,0 +1,77 @@ +/* + * 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 +#include +#include +#include +#include + +/* + * 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"); -- cgit v1.2.3