dtoc: Allow DTC environment variable to provide path to dtc
The system device-tree compiler may not be new enough to run the tests we
use in U-Boot (e.g. with binman). Allow use of a DTC environment variable
to point to the correct dtc. If not defined, the dtc on the default PATH
is used.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/README b/tools/binman/README
index 08c3e56..7f558ec 100644
--- a/tools/binman/README
+++ b/tools/binman/README
@@ -536,6 +536,10 @@
Most of the time such essoteric behaviour is not needed, but it can be
essential for complex images.
+If you need to specify a particular device-tree compiler to use, you can define
+the DTC environment variable. This can be useful when the system dtc is too
+old.
+
History / Credits
-----------------
diff --git a/tools/dtoc/fdt_util.py b/tools/dtoc/fdt_util.py
index ba0b6cc..ad06245 100644
--- a/tools/dtoc/fdt_util.py
+++ b/tools/dtoc/fdt_util.py
@@ -79,7 +79,8 @@
'-W', 'no-unit_address_vs_reg']
args.extend(search_list)
args.append(dts_input)
- command.Run('dtc', *args)
+ dtc = os.environ.get('DTC') or 'dtc'
+ command.Run(dtc, *args)
return dtb_output
def GetInt(node, propname, default=None):