Linux kernel is a complex, portable, modular and widely used piece of software, running on around 80% of servers and embedded systems in more than half of devices throughout the World. Device drivers play a critical role in how well a Linux system performs. As Linux has turned out to be one of the most popular operating systems used, the interest in developing proprietary device drivers is also increasing steadily.

This book will initially help you understand the basics of drivers as well as prepare for the long journey through the Linux Kernel. This book then covers drivers development based on various Linux subsystems such as memory management, PWM, RTC, IIO, IRQ management, and so on. The book also offers a practical approach on direct memory access and network device drivers.

By the end of this book, you will be comfortable with the concept of device driver development and will be in a position to write any device driver from scratch using the latest kernel version (v4.13 at the time of writing this book).

Linux内核是一个复杂的、可移植的、模块化的和广泛使用的软件，在全世界大约80%的服务器和超过一半的设备的嵌入式系统上运行。设备驱动在Linux系统的性能上起着关键作用。由于Linux已经成为最受欢迎的操作系统之一，人们对开发专有设备驱动程序的兴趣也在稳步增加。

本书首先将帮助你了解驱动的基础知识，以及为Linux内核的漫长旅程做准备。然后，本书涵盖了基于各种Linux子系统的驱动程序开发，如内存管理、PWM、RTC、IIO、IRQ管理等。本书还提供了一个关于直接内存访问和网络设备驱动的实用方法。

在本书结束时，你将对设备驱动开发的概念感到满意，并且能够使用最新的内核版本（本书编写时为v4.13）从头开始编写任何设备驱动。