sound/hda/hda_bus_type.c

   1 /*
   2  * HD-audio bus
   3  */
   4 #include <linux/init.h>
   5 #include <linux/device.h>
   6 #include <linux/module.h>
   7 #include <linux/export.h>
   8 #include <sound/hdaudio.h>
   9
  10 MODULE_DESCRIPTION("HD-audio bus");
  11 MODULE_LICENSE("GPL");
  12
  13 static int hda_bus_match(struct device *dev, struct device_driver *drv)
  14 {
  15         struct hdac_device *hdev = dev_to_hdac_dev(dev);
  16         struct hdac_driver *hdrv = drv_to_hdac_driver(drv);
  17
  18         if (hdev->type != hdrv->type)
  19                 return 0;
  20         if (hdrv->match)
  21                 return hdrv->match(hdev, hdrv);
  22         return 1;
  23 }
  24
  25 struct bus_type snd_hda_bus_type = {
  26         .name = "hdaudio",
  27         .match = hda_bus_match,
  28 };
  29 EXPORT_SYMBOL_GPL(snd_hda_bus_type);
  30
  31 static int __init hda_bus_init(void)
  32 {
  33         return bus_register(&snd_hda_bus_type);
  34 }
  35
  36 static void __exit hda_bus_exit(void)
  37 {
  38         bus_unregister(&snd_hda_bus_type);
  39 }
  40
  41 subsys_initcall(hda_bus_init);
  42 module_exit(hda_bus_exit);