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Contents of README:The source tree contains the Device Tree Compiler (dtc) toolchain for working with device tree source and binary files and also libfdt, a utility library for reading and manipulating the binary format. DTC and LIBFDT are maintained by: David Gibson <david@gibson.dropbear.id.au> Jon Loeliger <jdl@jdl.com> Python library -------------- A Python library is also available. To build this you will need to install swig and Python development files. On Debian distributions: sudo apt-get install swig python3-dev The library provides an Fdt class which you can use like this: $ PYTHONPATH=../pylibfdt python3 >>> import libfdt >>> fdt = libfdt.Fdt(open('test_tree1.dtb', mode='rb').read()) >>> node = fdt.path_offset('/subnode@1') >>> print(node) 124 >>> prop_offset = fdt.first_property_offset(node) >>> prop = fdt.get_property_by_offset(prop_offset) >>> print('%s=%s' % (prop.name, prop.as_str())) compatible=subnode1 >>> node2 = fdt.path_offset('/') >>> print(fdt.getprop(node2, 'compatible').as_str()) test_tree1 You will find tests in tests/pylibfdt_tests.py showing how to use each method. Help is available using the Python help command, e.g.: $ cd pylibfdt $ python3 -c "import libfdt; help(libfdt)" If you add new features, please check code coverage: $ sudo apt-get install python3-coverage $ cd tests # It's just 'coverage' on most other distributions $ python3-coverage run pylibfdt_tests.py $ python3-coverage html # Open 'htmlcov/index.html' in your browser To install the library via the normal setup.py method, use: ./pylibfdt/setup.py install [--prefix=/path/to/install_dir] If --prefix is not provided, the default prefix is used, typically '/usr' or '/usr/local'. See Python's distutils documentation for details. You can also install via the Makefile if you like, but the above is more common. To install both libfdt and pylibfdt you can use: make install [SETUP_PREFIX=/path/to/install_dir] \ [PREFIX=/path/to/install_dir] To disable building the python library, even if swig and Python are available, use: make NO_PYTHON=1 More work remains to support all of libfdt, including access to numeric values. Tests ----- Test files are kept in the tests/ directory. Use 'make check' to build and run all tests. If you want to adjust a test file, be aware that tree_tree1.dts is compiled and checked against a binary tree from assembler macros in trees.S. So if you change that file you must change tree.S also. Mailing list ------------ The following list is for discussion about dtc and libfdt implementation mailto:devicetree-compiler@vger.kernel.org Core device tree bindings are discussed on the devicetree-spec list: mailto:devicetree-spec@vger.kernel.org |
Name Last modified Size
Parent Directory -
CVS/ 17-Aug-2024 05:01 -
Documentation/ 23-Dec-2019 04:01 -
pylibfdt/ 23-Dec-2019 04:01 -
scripts/ 23-Dec-2019 04:01 -
tests/ 23-Dec-2019 04:01 -
BSD-2-Clause 22-Dec-2019 13:34 1.6K
GPL 23-Dec-2019 04:01 18K
Makefile 23-Dec-2019 04:01 8.2K
Makefile.convert-dtsv0 23-Dec-2019 04:01 330
Makefile.dtc 23-Dec-2019 04:01 470
Makefile.utils 23-Dec-2019 04:01 499
README 23-Dec-2019 04:01 2.7K
README.license 23-Dec-2019 04:01 2.8K
TODO 04-Dec-2015 13:30 260
checks.c 23-Dec-2019 04:01 49K
convert-dtsv0-lexer.l 23-Dec-2019 04:01 4.4K
data.c 23-Dec-2019 04:01 4.5K
dtc-lexer.l 23-May-2020 05:01 6.2K
dtc-parser.y 23-Dec-2019 04:01 11K
dtc.c 23-Dec-2019 04:01 9.3K
dtc.h 23-Dec-2019 04:01 8.3K
dtdiff 23-Dec-2019 04:01 680
fdtdump.c 23-Dec-2019 04:01 6.0K
fdtget.c 23-Dec-2019 04:01 8.5K
fdtoverlay.c 22-Dec-2019 13:34 4.3K
fdtput.c 23-Dec-2019 04:01 11K
flattree.c 23-Dec-2019 04:01 22K
fstree.c 23-Dec-2019 04:01 1.6K
livetree.c 23-Dec-2019 04:01 20K
srcpos.c 23-Dec-2019 04:01 8.6K
srcpos.h 23-Dec-2019 04:01 2.9K
treesource.c 23-Dec-2019 04:01 7.0K
util.c 23-Dec-2019 04:01 8.5K
util.h 23-Dec-2019 04:01 7.0K
yamltree.c 22-Dec-2019 13:34 6.3K
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