checkpatch: add DT compatible string documentation checks
This adds a simple check that any compatible strings in DeviceTree dts
files are present in Documentation/devicetree/bindings. Vendor prefixes
are also checked for existing in vendor-prefixes.txt These should be
temporary checks until we have more sophisticated binding schema
checking.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index d89e429..05c99c0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2040,6 +2040,33 @@
"Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag});
}
+# check for DT compatible documentation
+ if (defined $root && $realfile =~ /\.dts/ &&
+ $rawline =~ /^\+\s*compatible\s*=/) {
+ my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g;
+
+ foreach my $compat (@compats) {
+ my $compat2 = $compat;
+ my $dt_path = $root . "/Documentation/devicetree/bindings/";
+ $compat2 =~ s/\,[a-z]*\-/\,<\.\*>\-/;
+ `grep -Erq "$compat|$compat2" $dt_path`;
+ if ( $? >> 8 ) {
+ WARN("UNDOCUMENTED_DT_STRING",
+ "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr);
+ }
+
+ my $vendor = $compat;
+ my $vendor_path = $dt_path . "vendor-prefixes.txt";
+ next if (! -f $vendor_path);
+ $vendor =~ s/^([a-zA-Z0-9]+)\,.*/$1/;
+ `grep -Eq "$vendor" $vendor_path`;
+ if ( $? >> 8 ) {
+ WARN("UNDOCUMENTED_DT_STRING",
+ "DT compatible string vendor \"$vendor\" appears un-documented -- check $vendor_path\n" . $herecurr);
+ }
+ }
+ }
+
# check we are in a valid source file if not then ignore this hunk
next if ($realfile !~ /\.(h|c|s|S|pl|sh)$/);