Based on kernel version 3.19. Page generated on 2015-02-13 21:16 EST.
1 What: /sys/firmware/devicetree/* 2 Date: November 2013 3 Contact: Grant Likely <email@example.com> 4 Description: 5 When using OpenFirmware or a Flattened Device Tree to enumerate 6 hardware, the device tree structure will be exposed in this 7 directory. 8 9 It is possible for multiple device-tree directories to exist. 10 Some device drivers use a separate detached device tree which 11 have no attachment to the system tree and will appear in a 12 different subdirectory under /sys/firmware/devicetree. 13 14 Userspace must not use the /sys/firmware/devicetree/base 15 path directly, but instead should follow /proc/device-tree 16 symlink. It is possible that the absolute path will change 17 in the future, but the symlink is the stable ABI. 18 19 The /proc/device-tree symlink replaces the devicetree /proc 20 filesystem support, and has largely the same semantics and 21 should be compatible with existing userspace. 22 23 The contents of /sys/firmware/devicetree/ is a 24 hierarchy of directories, one per device tree node. The 25 directory name is the resolved path component name (node 26 name plus address). Properties are represented as files 27 in the directory. The contents of each file is the exact 28 binary data from the device tree.