SPI Device Driver Tutorial - Linux Device Driver Tutorial Part 47

What is a Kernel? | Definition from TechTarget

Kernel in Operating System - GeeksforGeeks

Main Components of Operating System | Kernel Explained (User vs Kernel Space) | 04

What is Linux? Understanding the Kernel, User Space How OS Protects Your System | Simply Byte | Simply Byte

Linux devices often look like files: open(), read(), write(), close(). But many devices need advanced controls that don’t fit generic system calls. That’s where ioctls (Input/Output Controls) come in. ioctl is the mechanism that lets user space send device-specific commands to kernel drivers, such as configuring modes, enabling features, querying device info, or managing buffers. This is why subsystems like DRM (graphics) and video4linux (camera/video capture) rely heavily on ioctls for detailed

System Calls and Kernel Communication - SlideServe