IoT & Hardware
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You're reading from  Linux Device Driver Development - Second Edition

Product typeBook
Published inApr 2022
PublisherPackt
ISBN-139781803240060
Edition2nd Edition
Concepts
Embedded Systems
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Author (1)
John Madieu
John Madieu
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John Madieu

John Madieu is an embedded Linux and kernel engineer living in Paris, France. His main activities consist of developing device drivers and Board Support Packages (BSPs) for companies in domains such as IoT, automation, transport, healthcare, energy, and the military. John is the founder and chief consultant at LABCSMART, a company that provides training and services for embedded Linux and Linux kernel engineering. He is an open source and embedded systems enthusiast, convinced that it is only by sharing knowledge that we can learn more. He is passionate about boxing, which he practiced for 6 years professionally, and continues to channel this passion through training sessions that he provides voluntarily.
Read more about John Madieu

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I2C framework abstractions in the Linux kernel

The Linux kernel I2C framework is made up of a few data structures, with the most important being as follows:

  • i2c_adapter: Used to abstract the I2C master device. It is used to identify a physical I2C bus.
  • i2c_algorithm: This abstracts the I2C bus transaction interface. Here, transaction means to transfer, such as read or write operations.
  • i2c_client: Used to abstract a slave device sitting on the I2C bus.
  • i2c_driver: The driver of the slave device. It contains a set of specific driving functions to deal with the device.
  • i2c_msg: This is the low-level representation of one segment of an I2C transaction. This data structure defines the device address, the transaction flags (if it's a transmit or receive, for example), a pointer to the data to send/receive, and the size of the data.

Since the scope of this chapter is limited to slave device drivers, we will focus on the last three data structures. However...

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Linux Device Driver Development - Second Edition
Published in: Apr 2022Publisher: PacktISBN-13: 9781803240060
© 2022 Packt Publishing Limited All Rights Reserved

Author (1)

author image
John Madieu

John Madieu is an embedded Linux and kernel engineer living in Paris, France. His main activities consist of developing device drivers and Board Support Packages (BSPs) for companies in domains such as IoT, automation, transport, healthcare, energy, and the military. John is the founder and chief consultant at LABCSMART, a company that provides training and services for embedded Linux and Linux kernel engineering. He is an open source and embedded systems enthusiast, convinced that it is only by sharing knowledge that we can learn more. He is passionate about boxing, which he practiced for 6 years professionally, and continues to channel this passion through training sessions that he provides voluntarily.
Read more about John Madieu

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