Transcription of Introduction to Device Trees
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Introduction to Device Trees
1 IntroductionA Device tree is a tree structure used to describe the physicalhardware in a system. Each node in the tree describes thecharacteristics of the Device being represented. The purpose ofthe Device tree is to describe Device information in a systemthat cannot necessarily be dynamically detected or discoveredby a client program. For example, a PCI host may be able toprobe and detect attached devices ; and so a Device tree nodedescribing PCI devices may not be required. However, adevice node is required to describe the PCI host bridge in thesystem, if that cannot be detected by the advent of the Device tree, the kernel containeddevice specific code.
A device tree is a tree structure used to describe the physical hardware in a system. Each node in the tree describes the characteristics of the device being represented. The purpose of the device tree is to describe device information in a system that cannot necessarily be dynamically detected or discovered by a client program.
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