Linux Device Drivers Development training

Device drivers provide software interfaces that control hardware and hide its complexity from applications, exposing devices as simple interfaces via /dev in the Linux kernel while managing access requests.

Learn Linux kernel device drivers basics: init and exit routines, the file_operations structure with open, read, write, and release, plus device registration, memory allocation, and interrupt handling.

Register a Linux kernel character device driver with major 90, implement open, read, write, and release, and test using a user-space program that writes to and reads from the device.

Write a basic hello world linux kernel module, compile with a makefile, insert with insmod, view printk messages via dmesg, and remove with rmmod.

Explore how the Linux kernel builds with top and subdirectory makefiles driven by configuration files and flags, determining which files compile into object files or modules.

explore kconfig files that define symbols and dependencies for compiling Linux kernel modules, and how make menuconfig reads these configurations across subdirectories.

Download and extract the Linux kernel, customize and configure it with make menuconfig or defconfig, then build for your development board architecture and flash.

Loadable kernel modules enable loading and unloading drivers at runtime, including filesystem drivers and memory devices, without full kernel recompilation, compiled separately and loaded with insmod or modprobe.

Learn to implement and pass kernel module parameters in a Linux kernel module, compile and insert the module, and verify parameter values via kernel logs during load and removal.