1.1 Node Names

In the DT, each node should follow the node-name@unit-address convention. The node name should be made up of 1 to 31 characters, starting with a lowercase (a-z) or uppercase (A-Z) letter, and can include digits (0-9), lowercase and uppercase letters, as well as the comma (,), period (.), underscore (_), plus sign (+) and dash symbol (-).

The unit address is specific to the bus type and must correspond to the first address in the node's reg property. If the reg property is absent, the unit address is omitted, and the node name alone distinguishes the node.

Example:

sdio-host@80000000 {}

The root node in the device tree is identified by a forward slash (/).