blob: 2277af9bf78b09248340c0cd6ed8c2be0b022d2d [file] [log] [blame]
#!/usr/bin/env python2
# SPDX-License-Identifier: GPL-2.0+
# Copyright (C) 2016 Google, Inc
# Written by Simon Glass <>
"""Device tree to C tool
This tool converts a device tree binary file (.dtb) into two C files. The
indent is to allow a C program to access data from the device tree without
having to link against libfdt. By putting the data from the device tree into
C structures, normal C code can be used. This helps to reduce the size of the
compiled program.
Dtoc produces two output files:
dt-structs.h - contains struct definitions
dt-platdata.c - contains data from the device tree using the struct
definitions, as well as U-Boot driver definitions.
This tool is used in U-Boot to provide device tree data to SPL without
increasing the code size of SPL. This supports the CONFIG_SPL_OF_PLATDATA
options. For more information about the use of this options and tool please
see doc/driver-model/of-plat.txt
from optparse import OptionParser
import os
import sys
import unittest
# Bring in the patman libraries
our_path = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(our_path, '../patman'))
# Bring in the libfdt module
sys.path.insert(0, 'scripts/dtc/pylibfdt')
sys.path.insert(0, os.path.join(our_path,
import dtb_platdata
import test_util
def run_tests(args):
"""Run all the test we have for dtoc
args: List of positional args provided to dtoc. This can hold a test
name to execute (as in 'dtoc -t test_empty_file', for example)
import test_dtoc
result = unittest.TestResult()
sys.argv = [sys.argv[0]]
test_name = args and args[0] or None
for module in (test_dtoc.TestDtoc,):
if test_name:
suite = unittest.TestLoader().loadTestsFromName(test_name, module)
except AttributeError:
suite = unittest.TestLoader().loadTestsFromTestCase(module)
print result
for _, err in result.errors:
print err
for _, err in result.failures:
print err
def RunTestCoverage():
"""Run the tests and check that we get 100% coverage"""
sys.argv = [sys.argv[0]]
test_util.RunTestCoverage('tools/dtoc/', '/',
['tools/patman/*.py', '*/fdt*', '*test*'], options.build_dir)
if __name__ != '__main__':
parser = OptionParser()
parser.add_option('-B', '--build-dir', type='string', default='b',
help='Directory containing the build output')
parser.add_option('-d', '--dtb-file', action='store',
help='Specify the .dtb input file')
parser.add_option('--include-disabled', action='store_true',
help='Include disabled nodes')
parser.add_option('-o', '--output', action='store', default='-',
help='Select output filename')
parser.add_option('-P', '--processes', type=int,
help='set number of processes to use for running tests')
parser.add_option('-t', '--test', action='store_true', dest='test',
default=False, help='run tests')
parser.add_option('-T', '--test-coverage', action='store_true',
default=False, help='run tests and check for 100% coverage')
(options, args) = parser.parse_args()
# Run our meagre tests
if options.test:
elif options.test_coverage:
dtb_platdata.run_steps(args, options.dtb_file, options.include_disabled,