3 # Copyright (C) 2016 Google, Inc
4 # Written by Simon Glass <sjg@chromium.org>
6 # SPDX-License-Identifier: GPL-2.0+
9 """Device tree to C tool
11 This tool converts a device tree binary file (.dtb) into two C files. The
12 indent is to allow a C program to access data from the device tree without
13 having to link against libfdt. By putting the data from the device tree into
14 C structures, normal C code can be used. This helps to reduce the size of the
17 Dtoc produces two output files:
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.
23 This tool is used in U-Boot to provide device tree data to SPL without
24 increasing the code size of SPL. This supports the CONFIG_SPL_OF_PLATDATA
25 options. For more information about the use of this options and tool please
26 see doc/driver-model/of-plat.txt
29 from optparse import OptionParser
33 # Bring in the patman libraries
34 our_path = os.path.dirname(os.path.realpath(__file__))
35 sys.path.append(os.path.join(our_path, '../patman'))
40 if __name__ != "__main__":
43 parser = OptionParser()
44 parser.add_option('-d', '--dtb-file', action='store',
45 help='Specify the .dtb input file')
46 parser.add_option('--include-disabled', action='store_true',
47 help='Include disabled nodes')
48 parser.add_option('-o', '--output', action='store', default='-',
49 help='Select output filename')
50 (options, args) = parser.parse_args()
53 raise ValueError('Please specify a command: struct, platdata')
55 plat = dtb_platdata.DtbPlatdata(options.dtb_file, options)
58 plat.SetupOutput(options.output)
59 structs = plat.ScanStructs()
62 for cmd in args[0].split(','):
64 plat.GenerateStructs(structs)
65 elif cmd == 'platdata':
68 raise ValueError("Unknown command '%s': (use: struct, platdata)" % cmd)