[patch 135/166] checkpatch: check proper licensing of Devicetree bindings

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From: Lubomir Rintel <lkundrak@xxxxx>
Subject: checkpatch: check proper licensing of Devicetree bindings

According to Devicetree maintainers (see Link: below), the Devicetree
binding documents are preferrably licensed (GPL-2.0-only OR BSD-2-Clause).

Let's check that.  The actual check is a bit more relaxed, to allow more
liberal but compatible licensing (e.g.  GPL-2.0-or-later OR BSD-2-Clause).

Link: https://lore.kernel.org/lkml/20200108142132.GA4830@bogus/
Link: http://lkml.kernel.org/r/20200309215153.38824-1-lkundrak@xxxxx
Signed-off-by: Lubomir Rintel <lkundrak@xxxxx>
Acked-by: Joe Perches <joe@xxxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
Cc: Laurent Pinchart <Laurent.pinchart@xxxxxxxxxxxxxxxx>,
Cc: Jonas Karlman <jonas@xxxxxxxxx>,
Cc: Jernej Skrabec <jernej.skrabec@xxxxxxxx>,
Cc: Mark Rutland <mark.rutland@xxxxxxx>,
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>,
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 scripts/checkpatch.pl |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/scripts/checkpatch.pl~checkpatch-check-proper-licensing-of-devicetree-bindings
+++ a/scripts/checkpatch.pl
@@ -3157,6 +3157,17 @@ sub process {
 						WARN("SPDX_LICENSE_TAG",
 						     "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr);
 					}
+					if ($realfile =~ m@^Documentation/devicetree/bindings/@ &&
+					    not $spdx_license =~ /GPL-2\.0.*BSD-2-Clause/) {
+						my $msg_level = \&WARN;
+						$msg_level = \&CHK if ($file);
+						if (&{$msg_level}("SPDX_LICENSE_TAG",
+
+								  "DT binding documents should be licensed (GPL-2.0-only OR BSD-2-Clause)\n" . $herecurr) &&
+						    $fix) {
+							$fixed[$fixlinenr] =~ s/SPDX-License-Identifier: .*/SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)/;
+						}
+					}
 				}
 			}
 		}
_



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