Validate dtc is new enough
Subsequent patches assume that dtc supports various recent features.
These are available in dtc 1.4.0. Validate that dtc is at least that
version.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/dtc-version.sh b/tools/dtc-version.sh
new file mode 100755
index 0000000..e8c94d3
--- /dev/null
+++ b/tools/dtc-version.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+#
+# dtc-version dtc-command
+#
+# Prints the dtc version of `dtc-command' in a canonical 4-digit form
+# such as `0222' for binutils 2.22
+#
+
+dtc="$*"
+
+if [ ${#dtc} -eq 0 ]; then
+ echo "Error: No dtc command specified."
+ printf "Usage:\n\t$0 <dtc-command>\n"
+ exit 1
+fi
+
+MAJOR=$($dtc -v | head -1 | awk '{print $NF}' | cut -d . -f 1)
+MINOR=$($dtc -v | head -1 | awk '{print $NF}' | cut -d . -f 2)
+
+printf "%02d%02d\\n" $MAJOR $MINOR