John Madieu - Linux Device Drivers Development

BIRMINGHAM - MUMBAI

Copyright 2017 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: October 2017

Production reference: 1111017

Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham
B3 2PB, UK.

ISBN 978-1-78528-000-9

www.packtpub.com

John Madieu is an embedded Linux and kernel engineer living in France, in Paris. His main activities consist of developing drivers and Board Support Packages (BSP) for companies in domains such as automation, transport, healthcare, energy, and the military. John works at EXPEMB, a French company that is a pioneer in electronical board design based on computer-on-module, and in embedded Linux solutions. He is an open source and embedded systems enthusiast, convinced that it is only by sharing knowledge that one learns more.

He is passionate about boxing, which he practised for 6 years professionally, and continues to transmit this passion through sessions of training that he provides voluntarily.

Jrme Pouiller is a true geek and fascinated by understanding how things do work.

He was an early adopter of Linux. He found in Linux a system with no limits, where everything could be changed. Linux has provided an excellent platform to hack anything.

He graduated in machine learning at Ecole Pour lInformatique et les Technologies Avances (EPITA). Beside his studies, he learned electronics by himself. He quickly turned his attention to the piece of software at crossroad of all advanced systems: the operating system. It is now one of his favorite subjects.

For 15 years now, Jrme Pouiller has designed (and often debugged) Linux firmware for a variety of industries (multimedia, healthcare, nuclear, military).

In addition to his consulting activities, Jrme Pouiler is professor of operating systems at Institut National des Sciences Appliques (INSA). He has written many course materials about system programming, operating system design, realtime systems, and more.

For support files and downloads related to your book, please visit www.PacktPub.com .

Did you know that Packt offers eBook versions of every book published, with PDF and ePub files available? You can upgrade to the eBook version at www.PacktPub.com and as a print book customer, you are entitled to a discount on the eBook copy. Get in touch with us at service@packtpub.com for more details.

At www.PacktPub.com , you can also read a collection of free technical articles, sign up for a range of free newsletters and receive exclusive discounts and offers on Packt books and eBooks.

https://www.packtpub.com/mapt

Get the most in-demand software skills with Mapt. Mapt gives you full access to all Packt books and video courses, as well as industry-leading tools to help you plan your personal development and advance your career.

• Fully searchable across every book published by Packt
• Copy and paste, print, and bookmark content
• On demand and accessible via a web browser

Thanks for purchasing this Packt book. At Packt, quality is at the heart of our editorial process. To help us improve, please leave us an honest review on this book's Amazon page at https://www.amazon.com/dp/1785280007 .

If you'd like to join our team of regular reviewers, you can e-mail us at customerreviews@packtpub.com. We award our regular reviewers with free eBooks and videos in exchange for their valuable feedback. Help us be relentless in improving our products!

The 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 the devices throughout the world. Device drivers play a critical role in the context of how well a Linux system performs. As Linux has turned out to be one of the most popular operating systems interest in developing personal device drivers is also increasing steadily.

A device driver is the link between the user space and devices, through the kernel.

This book will begins with two chapters that will help you understand the basics of drivers and prepare you for the long journey through the Linux kernel. This book will then cover driver development based on Linux subsystems such as memory management, PWM, RTC, IIO, GPIO, IRQ management. The book will also cover practical approach to direct memory access and network device drivers.