Switch from GPLv2 to GPLv2+

[fw/altos] / src / drivers / ao_companion.c

diff --git a/src/drivers/ao_companion.c b/src/drivers/ao_companion.c
index 7e02939bf7bc0c01bca788bce526da7ee1172115..f82558a3343e6e3890bf71d49a45a11fa84ae5cd 100644 (file)
--- a/src/drivers/ao_companion.c
+++ b/src/drivers/ao_companion.c
@@ -3,7 +3,8 @@
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful, but
  * WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -23,6 +24,10 @@
 #define ao_spi_fast(b)
 #endif
 
+#if !HAS_COMPANION
+#error HAS_COMPANION not set in ao_companion.c
+#endif
+
 #define COMPANION_SELECT()     do {                    \
                ao_spi_get_bit(AO_COMPANION_CS_PORT,    \
                               AO_COMPANION_CS_PIN,     \