util/cavium/devicetree_convert.py

   1 #!/usr/bin/env python2
   2 # SPDX-License-Identifier: GPL-3.0-or-later
   3 # devicetree_convert Tool to convert a DTB to a static C file
   4
   5 from pyfdt.pyfdt import FdtBlobParse
   6 import argparse
   7
   8 parser = argparse.ArgumentParser(description='Cavium DTB to C converter')
   9 parser.add_argument('--indtb', help='Compiled devicetree blob to parse')
  10 parser.add_argument('--out', help='The file to write')
  11 parser.add_argument('--verbose', help='Be verbose', action='store_true', default=False)
  12 args = parser.parse_args()
  13
  14 outfile = None
  15 if args.out is not None:
  16     outfile = open(args.out, 'w')
  17     outfile.write("// This file is automatically generated.\n")
  18     outfile.write("// DO NOT EDIT BY HAND.\n\n")
  19     outfile.write("#include <bdk-devicetree.h>\n\n")
  20     outfile.write("const struct bdk_devicetree_key_value devtree[] = {\n")
  21
  22 with open(args.indtb) as infile:
  23     dtb = FdtBlobParse(infile)
  24     fdt = dtb.to_fdt()
  25     for (path, node) in fdt.resolve_path('/cavium,bdk').walk():
  26         if "/" in path:
  27             path = path.replace("/", "")
  28         if len(node) == 1:
  29             for i in node:
  30                 if type(i) is not unicode:
  31                     print "%s: Type is not string" % path
  32                     continue
  33                 if args.verbose:
  34                     print "%s = %s" % (path, i)
  35                 if outfile is not None:
  36                     outfile.write("{\"%s\", \"%s\"},\n" % (path, i))
  37         else:
  38             print "%s: Arrays aren't supported" % path
  39
  40 if outfile is not None:
  41     outfile.write("{0, 0},\n")
  42     outfile.write("};\n")