30、音频与块设备驱动技术解析

音频与块设备驱动技术解析

音频驱动部分

平台驱动定义与初始化

以下是一个平台驱动的定义和初始化代码：

return 0;
}
/* Platform driver definition */
static struct platform_driver mycard_audio_driver = {
  .probe  = mycard_audio_probe,    /* Probe method */
  .remove = mycard_audio_remove,   /* Remove method */
  .driver = {
    .name = "mycard_ALSA",
  },
};
/* Driver Initialization */
static int __init 
mycard_audio_init(void)
{
  /* Register the platform driver and device */
  platform_driver_register(&mycard_audio_driver);
  mycard_device = platform_device_register_simple("mycard_ALSA", 
                                                  -1, NULL, 0);
  return 0;
}
/* Driver Exit */
static void __exit 
mycard_audio_exit(void)
{
  platform_device_unregister(myca