Device Tree
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Standard Properties
compatible
The compatible property value consists of one or more strings that define the specific programming model for the device. This list of strings should be used by a client program for device driver selection. The property value consists of a concatenated list of null terminated strings, from most specific to most general. They allow a device to express its compatibility with a family of similar devices, potentially allowing a single device driver to match against several devices.
The recommended format is "manufacturer,model", where manufacturer is a string describing the name of the manufacturer (such as a stock ticker symbol), and model specifies the model number.
status
- “okay”: Indicates the device is operational
- “disabled”: Indicates that the device is not presently operational, but it might become operational in the future (for example, something is not plugged in, or switched off)
- “reserved”, “fail”, “fail-sss” are also used when needed
address-cells and size-cells
The address-cells and size-cells properties may be used in any device node that has children in the devicetree hierarchy and describes how child device nodes should be addressed.
DTB Structure
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