28、Linux 视频与音频驱动开发详解

Linux 视频与音频驱动开发详解

1. 视频驱动相关内容

1.1 平台驱动结构及模块初始化与退出

以下是平台驱动结构及模块初始化与退出的代码：

/* Release memory region */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, res->end - res->start + 1);
platform_set_drvdata(pdev, NULL);
return 0;
}
/* The platform driver structure */
static struct platform_driver myfb_driver = {
  .probe     = myfb_probe,
  .remove    = myfb_remove,
  .driver    = {
    .name    = "myfb",
  },
};
/* Module Initialization */
int __init 
myfb_init(void)
{
  platform_device_add(&myfb_device);
  return platform_driver_register(&myfb_driver);
}
/* Module Exit */
void __exit 
myfb_exit(void)
{
  platform_driver_unregister(&myfb_driver);
  platform_device_u