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authorPatrick Rudolph <patrick.rudolph@9elements.com>2018-05-11 12:28:54 +0200
committerPatrick Georgi <pgeorgi@google.com>2018-07-09 09:54:22 +0000
commit03d31427338ba59d3a354ac1beb3b0c153471768 (patch)
tree8b53b140303154019e246e8df7ea946a930ab29f
parent251279c537397835a4504165e7582cb29c19891c (diff)
downloadcoreboot-03d31427338ba59d3a354ac1beb3b0c153471768.tar.xz
util/cavium: Add tool to convert devicetree blobs
Convert Cavium's BDK devicetree blob to a static C file. The resulting file must be included in mainboard folder to provide board specific configuration values to BDK functions. Example call: python devicetree_convert.py --in sff8104.dtb --out bdk_devicetree.c Change-Id: I76a5588aefe4f680228eca46a0e4dba7e695931c Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com> Reviewed-on: https://review.coreboot.org/26228 Reviewed-by: David Hendricks <david.hendricks@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
-rw-r--r--util/cavium/devicetree_convert.py55
1 files changed, 55 insertions, 0 deletions
diff --git a/util/cavium/devicetree_convert.py b/util/cavium/devicetree_convert.py
new file mode 100644
index 0000000000..70d89af686
--- /dev/null
+++ b/util/cavium/devicetree_convert.py
@@ -0,0 +1,55 @@
+#!/usr/bin/python
+
+# devicetree_convert Tool to convert a DTB to a static C file
+# Copyright (C) 2018 Facebook Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+
+from pyfdt.pyfdt import FdtBlobParse
+import argparse
+
+parser = argparse.ArgumentParser(description='Cavium DTB to C converter')
+parser.add_argument('--indtb', help='Compiled devicetree blob to parse')
+parser.add_argument('--out', help='The file to write')
+parser.add_argument('--verbose', help='Be verbose', action='store_true', default=False)
+args = parser.parse_args()
+
+outfile = None
+if args.out is not None:
+ outfile = open(args.out, 'w')
+ outfile.write("// This file is part of the coreboot project.\n")
+ outfile.write("// This file is automatically generated.\n")
+ outfile.write("// DO NOT EDIT BY HAND.\n\n")
+ outfile.write("#include <bdk-devicetree.h>\n\n")
+ outfile.write("const struct bdk_devicetree_key_value devtree[] = {\n")
+
+with open(args.indtb) as infile:
+ dtb = FdtBlobParse(infile)
+ fdt = dtb.to_fdt()
+ for (path, node) in fdt.resolve_path('/cavium,bdk').walk():
+ if "/" in path:
+ path = path.replace("/", "")
+ if len(node) == 1:
+ for i in node:
+ if type(i) is not unicode:
+ print "%s: Type is not string" % path
+ continue
+ if args.verbose:
+ print "%s = %s" % (path, i)
+ if outfile is not None:
+ outfile.write("{\"%s\", \"%s\"},\n" % (path, i))
+ else:
+ print "%s: Arrays aren't supported" % path
+
+if outfile is not None:
+ outfile.write("{0, 0},\n")
+ outfile.write("};\n")