diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c0688e62741..bc036f7559d 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3135,7 +3135,7 @@ sub process {
 
 # check for DT compatible documentation
 		if (defined $root &&
-			(($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
+			(($realfile =~ /\.(dts|dtsi|overlay)$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) ||
 			 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) {
 
 			my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
@@ -3172,7 +3172,7 @@ sub process {
 				my $comment = "";
 				if ($realfile =~ /\.(h|s|S)$/) {
 					$comment = '/*';
-				} elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
+				} elsif ($realfile =~ /\.(c|dts|dtsi|overlay)$/) {
 					$comment = '//';
 				} elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
 					$comment = '#';
@@ -3214,7 +3214,7 @@ sub process {
 		}
 
 # check we are in a valid source file if not then ignore this hunk
-		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/);
+		next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts|overlay)$/);
 
 # check for using SPDX-License-Identifier on the wrong line number
 		if ($realline != $checklicenseline &&
@@ -3295,7 +3295,7 @@ sub process {
 		}
 
 # check we are in a valid source file C or perl if not then ignore this hunk
-		next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
+		next if ($realfile !~ /\.(h|c|pl|dtsi|dts|overlay)$/);
 
 # at the beginning of a line any tabs must come first and anything
 # more than $tabsize must use tabs, except multi-line macros which may start