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Linux Device Driver Development

You're reading from   Linux Device Driver Development Everything you need to start with device driver development for Linux kernel and embedded Linux

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Product type Paperback
Published in Apr 2022
Publisher Packt
ISBN-13 9781803240060
Length 708 pages
Edition 2nd Edition
Languages
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Author (1):
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John Madieu John Madieu
Author Profile Icon John Madieu
John Madieu
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Table of Contents (23) Chapters Close

Preface 1. Section 1 -Linux Kernel Development Basics
2. Chapter 1: Introduction to Kernel Development FREE CHAPTER 3. Chapter 2: Understanding Linux Kernel Module Basic Concepts 4. Chapter 3: Dealing with Kernel Core Helpers 5. Chapter 4: Writing Character Device Drivers 6. Section 2 - Linux Kernel Platform Abstraction and Device Drivers
7. Chapter 5: Understanding and Leveraging the Device Tree 8. Chapter 6: Introduction to Devices, Drivers, and Platform Abstraction 9. Chapter 7: Understanding the Concept of Platform Devices and Drivers 10. Chapter 8: Writing I2C Device Drivers 11. Chapter 9: Writing SPI Device Drivers 12. Section 3 - Making the Most out of Your Hardware
13. Chapter 10: Understanding the Linux Kernel Memory Allocation 14. Chapter 11: Implementing Direct Memory Access (DMA) Support 15. Chapter 12: Abstracting Memory Access – Introduction to the Regmap API: a Register Map Abstraction 16. Chapter 13: Demystifying the Kernel IRQ Framework 17. Chapter 14: Introduction to the Linux Device Model 18. Section 4 - Misc Kernel Subsystems for the Embedded World
19. Chapter 15: Digging into the IIO Framework 20. Chapter 16: Getting the Most Out of the Pin Controller and GPIO Subsystems 21. Chapter 17: Leveraging the Linux Kernel Input Subsystem 22. Other Books You May Enjoy

Walking through user-space IIO tools

Though we have already gone through the steps required to capture IIO data, it might be tedious and confusing since each step must be performed manually. There are some useful tools you can use to ease and speed up your app development dealing with IIO devices. These are all from the libiio package, developed by Analog Devices, Inc. to interface IIO devices, available here: https://github.com/analogdevicesinc/libiio.

User-space applications can easily use the libiio library, which under the hood is a wrapper that relies on the following interfaces:

  • /sys/bus/iio/devices, the IIO sysfs interface, which is mainly used for configuration/settings
  • The /dev/iio/deviceX character device, for data/acquisitions

The preceding are exactly what we have manually dealt with so far. The tool's source code can be found under the library's tests directory: https://github.com/analogdevicesinc/libiio/tree/master/tests offers tools such...

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