说明：  这本书说明了Linux下一些具体的驱动（字符设备，串行设备，块设备，vedio,audio驱动）怎么编写，以及驱动开发的一些理论，很实用。
(This book is an entry book to learn linux driver, it explains bootloader, kernel initialization, file system, port linux and other issues. it explains in a simple way so that it is very easy to understand. )