xref: /openbmc/u-boot/tools/dtoc/dtoc.py (revision baefb63a) 
1#!/usr/bin/python
2#
3# Copyright (C) 2016 Google, Inc
4# Written by Simon Glass <sjg@chromium.org>
5#
6# SPDX-License-Identifier:	GPL-2.0+
7#
8
9"""Device tree to C tool
10
11This tool converts a device tree binary file (.dtb) into two C files. The
12indent is to allow a C program to access data from the device tree without
13having to link against libfdt. By putting the data from the device tree into
14C structures, normal C code can be used. This helps to reduce the size of the
15compiled program.
16
17Dtoc produces two output files:
18
19   dt-structs.h  - contains struct definitions
20   dt-platdata.c - contains data from the device tree using the struct
21                      definitions, as well as U-Boot driver definitions.
22
23This tool is used in U-Boot to provide device tree data to SPL without
24increasing the code size of SPL. This supports the CONFIG_SPL_OF_PLATDATA
25options. For more information about the use of this options and tool please
26see doc/driver-model/of-plat.txt
27"""
28
29from optparse import OptionParser
30import os
31import sys
32import unittest
33
34# Bring in the patman libraries
35our_path = os.path.dirname(os.path.realpath(__file__))
36sys.path.append(os.path.join(our_path, '../patman'))
37
38import dtb_platdata
39
40def run_tests():
41    """Run all the test we have for dtoc"""
42    import test_dtoc
43
44    result = unittest.TestResult()
45    sys.argv = [sys.argv[0]]
46    for module in (test_dtoc.TestDtoc,):
47        suite = unittest.TestLoader().loadTestsFromTestCase(module)
48        suite.run(result)
49
50    print result
51    for _, err in result.errors:
52        print err
53    for _, err in result.failures:
54        print err
55
56if __name__ != '__main__':
57    sys.exit(1)
58
59parser = OptionParser()
60parser.add_option('-d', '--dtb-file', action='store',
61                  help='Specify the .dtb input file')
62parser.add_option('--include-disabled', action='store_true',
63                  help='Include disabled nodes')
64parser.add_option('-o', '--output', action='store', default='-',
65                  help='Select output filename')
66parser.add_option('-t', '--test', action='store_true', dest='test',
67                  default=False, help='run tests')
68(options, args) = parser.parse_args()
69
70# Run our meagre tests
71if options.test:
72    run_tests()
73
74else:
75    dtb_platdata.run_steps(args, options.dtb_file, options.include_disabled,
76                           options.output)
77