Device Tree
Device Tree is a data structure and language used in embedded systems, particularly with Linux-based operating systems, to describe the hardware components of a system in a platform-independent way. It allows the kernel to dynamically discover and configure hardware without hard-coded details, enabling a single kernel image to run on multiple hardware variants. The Device Tree comprises a source file (.dts) that is compiled into a binary blob (.dtb) which the bootloader passes to the kernel at startup.
Developers should learn Device Tree when working on embedded Linux systems, such as those using ARM, PowerPC, or RISC-V architectures, to manage hardware abstraction and portability. It is essential for customizing kernel configurations for specific boards, handling device drivers, and supporting multiple hardware platforms with minimal code changes, making it crucial for embedded software engineers and kernel developers.