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>

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>
Wolfgang Denk · Tom Rini
1 parent 4fa7613c50
Showing 1 changed file with 12 additions and 0 deletions Side-by-side Diff
Licenses/README
@@ -37,6 +37,18 @@
  
 	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].
...	...	@@ -37,6 +37,18 @@
37	37
38	38	SPDX-License-Identifier: GPL-2.0+
39	39
	40	+Ideally, the license terms of all files in the source tree should be
	41	+defined by such License Identifiers; in no case a file can contain
	42	+more than one such License Identifier list.
	43	+
	44	+If a "SPDX-License-Identifier:" line references more than one Unique
	45	+License Identifier, then this means that the respective file can be
	46	+used under the terms of either of these licenses, i. e. with
	47	+
	48	+ SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
	49	+
	50	+you can chose between GPL-2.0+ and BSD-3-Clause licensing.
	51	+
40	52	We use the SPDX Unique License Identifiers here; these are available
41	53	at [2].
42	54