Devicetree is a data structure for describing hardware. Rather than hard coding
every detail of a device into an operating system, many aspects of the hardware
can be described in a data structure that is passed to the operating system at
boot time. The devicetree is used by OpenFirmware, OpenPOWER Abstraction Layer
(OPAL), Power Architecture Platform Requirements (PAPR) and in the standalone
Flattened Device Tree (FDT) form.
