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- What: /sys/firmware/devicetree/*
- Date: November 2013
- Contact: Grant Likely <grant.likely@linaro.org>
- Description:
- When using OpenFirmware or a Flattened Device Tree to enumerate
- hardware, the device tree structure will be exposed in this
- directory.
- It is possible for multiple device-tree directories to exist.
- Some device drivers use a separate detached device tree which
- have no attachment to the system tree and will appear in a
- different subdirectory under /sys/firmware/devicetree.
- Userspace must not use the /sys/firmware/devicetree/base
- path directly, but instead should follow /proc/device-tree
- symlink. It is possible that the absolute path will change
- in the future, but the symlink is the stable ABI.
- The /proc/device-tree symlink replaces the devicetree /proc
- filesystem support, and has largely the same semantics and
- should be compatible with existing userspace.
- The contents of /sys/firmware/devicetree/ is a
- hierarchy of directories, one per device tree node. The
- directory name is the resolved path component name (node
- name plus address). Properties are represented as files
- in the directory. The contents of each file is the exact
- binary data from the device tree.
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