From 17fd36c123038d2e6c9db679feef4d9e886cd4a4 Mon Sep 17 00:00:00 2001
From: Wolfgang Denk <wd@denx.de>
Date: Tue, 8 Oct 2013 21:53:45 +0200
Subject: [PATCH] SPDX: document dual license notation

In [1] we discussed how we should deal with dual (or, more generally,
multiple) licensed files.  Add this to  Licenses/README  so it's
properly documented.

[1] http://thread.gmane.org/gmane.comp.boot-loaders.u-boot/166518

Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Add the word 'list' to the end of the line, per Stephen Warren's
feedback]
Signed-off-by: Tom Rini <trini@ti.com>
---
 Licenses/README | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Licenses/README b/Licenses/README
index 9f611925573..c6ff2774fc9 100644
--- a/Licenses/README
+++ b/Licenses/README
@@ -37,6 +37,18 @@ replaced by a single line:
 
 	SPDX-License-Identifier:	GPL-2.0+
 
+Ideally, the license terms of all files in the source tree should be
+defined by such License Identifiers; in no case a file can contain
+more than one such License Identifier list.
+
+If a "SPDX-License-Identifier:" line references more than one Unique
+License Identifier, then this means that the respective file can be
+used under the terms of either of these licenses, i. e. with
+
+	SPDX-License-Identifier:	GPL-2.0+	BSD-3-Clause
+
+you can chose between GPL-2.0+ and BSD-3-Clause licensing.
+
 We use the SPDX Unique License Identifiers here; these are available
 at [2].
 
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