Linux and the Devicetree — The Linux Kernel documentation
This article describes how Linux uses the device tree. An overview of the device tree data format can be found on the device tree usage page at devicetree.org[1]. https://www.devicetree.org/specifications/ The “Open Firmware Device Tree”, or simply Devicetree (DT), is a data structure and language for describing hardware. More specifically, it is a description of hardware that is readable by an operating system so that the operating system doesn’t need to hard code details of the machine. Structurally, the DT is a tree, or acyclic graph with named nodes, and nodes may have an arbitrary number of named properties encapsulating arbitrary data. A mechanism also exists to create arbitrary links from one node to another outside of the natural tree structure. Conceptually, a common set of usage conventions, called ‘bindings’, is defined for how data should appear in the tree to describe typical hardware characteristics including data busses, interrupt lines, GPIO connections, and peripheral