Switch from GPLv2 to GPLv2+

Signed-off-by: Keith Packard <keithp@keithp.com>

79 files changed, 158 insertions, 79 deletions

diff --git a/src/drivers/ao_25lc1024.c b/src/drivers/ao_25lc1024.c
index fac0a430..a9c897b3 100644
--- a/src/drivers/ao_25lc1024.c
+++ b/src/drivers/ao_25lc1024.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
diff --git a/src/drivers/ao_25lc1024.h b/src/drivers/ao_25lc1024.h
index 44e52387..7e48f0dd 100644
--- a/src/drivers/ao_25lc1024.h
+++ b/src/drivers/ao_25lc1024.h
@@ -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
diff --git a/src/drivers/ao_74hc165.c b/src/drivers/ao_74hc165.c
index 143f4e3f..8842801d 100644
--- a/src/drivers/ao_74hc165.c
+++ b/src/drivers/ao_74hc165.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
diff --git a/src/drivers/ao_74hc165.h b/src/drivers/ao_74hc165.h
index 3ae51353..febbf1b3 100644
--- a/src/drivers/ao_74hc165.h
+++ b/src/drivers/ao_74hc165.h
@@ -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
diff --git a/src/drivers/ao_74hc497.c b/src/drivers/ao_74hc497.c
index 4c13ee71..b3fd3c91 100644
--- a/src/drivers/ao_74hc497.c
+++ b/src/drivers/ao_74hc497.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
diff --git a/src/drivers/ao_74hc497.h b/src/drivers/ao_74hc497.h
index 6df7bcae..bb14f20a 100644
--- a/src/drivers/ao_74hc497.h
+++ b/src/drivers/ao_74hc497.h
@@ -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
diff --git a/src/drivers/ao_aprs.h b/src/drivers/ao_aprs.h
index a033fa0b..8f70d2d0 100644
--- a/src/drivers/ao_aprs.h
+++ b/src/drivers/ao_aprs.h
@@ -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
diff --git a/src/drivers/ao_at24c.c b/src/drivers/ao_at24c.c
index 2a23be3a..8f91e3ca 100644
--- a/src/drivers/ao_at24c.c
+++ b/src/drivers/ao_at24c.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
diff --git a/src/drivers/ao_at45db161d.c b/src/drivers/ao_at45db161d.c
index e7e74153..abba3f1f 100644
--- a/src/drivers/ao_at45db161d.c
+++ b/src/drivers/ao_at45db161d.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
diff --git a/src/drivers/ao_at45db161d.h b/src/drivers/ao_at45db161d.h
index 9ee6f1b6..db52f0f4 100644
--- a/src/drivers/ao_at45db161d.h
+++ b/src/drivers/ao_at45db161d.h
@@ -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
diff --git a/src/drivers/ao_btm.c b/src/drivers/ao_btm.c
index 8e7052cb..c65a8548 100644
--- a/src/drivers/ao_btm.c
+++ b/src/drivers/ao_btm.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
diff --git a/src/drivers/ao_bufio.c b/src/drivers/ao_bufio.c
index 70e30b67..f212da53 100644
--- a/src/drivers/ao_bufio.c
+++ b/src/drivers/ao_bufio.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
diff --git a/src/drivers/ao_bufio.h b/src/drivers/ao_bufio.h
index 6629f143..b0a11944 100644
--- a/src/drivers/ao_bufio.h
+++ b/src/drivers/ao_bufio.h
@@ -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
diff --git a/src/drivers/ao_button.c b/src/drivers/ao_button.c
index 8e7dead7..1be788a0 100644
--- a/src/drivers/ao_button.c
+++ b/src/drivers/ao_button.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
diff --git a/src/drivers/ao_button.h b/src/drivers/ao_button.h
index ce349d65..fe5b590e 100644
--- a/src/drivers/ao_button.h
+++ b/src/drivers/ao_button.h
@@ -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
diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c
index 6b800585..da5bbeba 100644
--- a/src/drivers/ao_cc1120.c
+++ b/src/drivers/ao_cc1120.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
diff --git a/src/drivers/ao_cc1120.h b/src/drivers/ao_cc1120.h
index 943f3449..87b083d4 100644
--- a/src/drivers/ao_cc1120.h
+++ b/src/drivers/ao_cc1120.h
@@ -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
diff --git a/src/drivers/ao_cc115l.c b/src/drivers/ao_cc115l.c
index 24180f34..a67071d2 100644
--- a/src/drivers/ao_cc115l.c
+++ b/src/drivers/ao_cc115l.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
diff --git a/src/drivers/ao_cc115l.h b/src/drivers/ao_cc115l.h
index 811c14aa..c40f5358 100644
--- a/src/drivers/ao_cc115l.h
+++ b/src/drivers/ao_cc115l.h
@@ -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
diff --git a/src/drivers/ao_cc1200.c b/src/drivers/ao_cc1200.c
index cd85f208..1f2a3ba9 100644
--- a/src/drivers/ao_cc1200.c
+++ b/src/drivers/ao_cc1200.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
diff --git a/src/drivers/ao_cc1200.h b/src/drivers/ao_cc1200.h
index b2b63cde..8e17bbd9 100644
--- a/src/drivers/ao_cc1200.h
+++ b/src/drivers/ao_cc1200.h
@@ -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
diff --git a/src/drivers/ao_companion.c b/src/drivers/ao_companion.c
index 5f07e8b0..f82558a3 100644
--- 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
diff --git a/src/drivers/ao_event.c b/src/drivers/ao_event.c
index 8f88d778..9856c2aa 100644
--- a/src/drivers/ao_event.c
+++ b/src/drivers/ao_event.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
diff --git a/src/drivers/ao_event.h b/src/drivers/ao_event.h
index ea89da23..d1c69d81 100644
--- a/src/drivers/ao_event.h
+++ b/src/drivers/ao_event.h
@@ -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
diff --git a/src/drivers/ao_fat.c b/src/drivers/ao_fat.c
index cbcd42bc..fb8eecff 100644
--- a/src/drivers/ao_fat.c
+++ b/src/drivers/ao_fat.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
diff --git a/src/drivers/ao_fat.h b/src/drivers/ao_fat.h
index 01435363..39f4207b 100644
--- a/src/drivers/ao_fat.h
+++ b/src/drivers/ao_fat.h
@@ -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
diff --git a/src/drivers/ao_gps_sirf.c b/src/drivers/ao_gps_sirf.c
index d89435b9..8bebd610 100644
--- a/src/drivers/ao_gps_sirf.c
+++ b/src/drivers/ao_gps_sirf.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
diff --git a/src/drivers/ao_gps_skytraq.c b/src/drivers/ao_gps_skytraq.c
index 066df6ff..c483382e 100644
--- a/src/drivers/ao_gps_skytraq.c
+++ b/src/drivers/ao_gps_skytraq.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
diff --git a/src/drivers/ao_gps_ublox.c b/src/drivers/ao_gps_ublox.c
index 74c29e0a..22af413a 100644
--- a/src/drivers/ao_gps_ublox.c
+++ b/src/drivers/ao_gps_ublox.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
diff --git a/src/drivers/ao_gps_ublox.h b/src/drivers/ao_gps_ublox.h
index e4a358a8..1d9bcee8 100644
--- a/src/drivers/ao_gps_ublox.h
+++ b/src/drivers/ao_gps_ublox.h
@@ -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
diff --git a/src/drivers/ao_hmc5883.c b/src/drivers/ao_hmc5883.c
index f761671a..f668fb66 100644
--- a/src/drivers/ao_hmc5883.c
+++ b/src/drivers/ao_hmc5883.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
diff --git a/src/drivers/ao_hmc5883.h b/src/drivers/ao_hmc5883.h
index ff2725eb..78637b02 100644
--- a/src/drivers/ao_hmc5883.h
+++ b/src/drivers/ao_hmc5883.h
@@ -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
diff --git a/src/drivers/ao_lcd.c b/src/drivers/ao_lcd.c
index 6def0c80..c35093bc 100644
--- a/src/drivers/ao_lcd.c
+++ b/src/drivers/ao_lcd.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
diff --git a/src/drivers/ao_lco.c b/src/drivers/ao_lco.c
index 6c192537..00f10ecc 100644
--- a/src/drivers/ao_lco.c
+++ b/src/drivers/ao_lco.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
diff --git a/src/drivers/ao_lco.h b/src/drivers/ao_lco.h
index 253f9702..5721eed5 100644
--- a/src/drivers/ao_lco.h
+++ b/src/drivers/ao_lco.h
@@ -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
diff --git a/src/drivers/ao_lco_cmd.c b/src/drivers/ao_lco_cmd.c
index 6a365687..dcc0c6d0 100644
--- a/src/drivers/ao_lco_cmd.c
+++ b/src/drivers/ao_lco_cmd.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
diff --git a/src/drivers/ao_lco_cmd.h b/src/drivers/ao_lco_cmd.h
index c55448cd..2975bffe 100644
--- a/src/drivers/ao_lco_cmd.h
+++ b/src/drivers/ao_lco_cmd.h
@@ -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
diff --git a/src/drivers/ao_lco_func.c b/src/drivers/ao_lco_func.c
index 08d45467..862cb1be 100644
--- a/src/drivers/ao_lco_func.c
+++ b/src/drivers/ao_lco_func.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
diff --git a/src/drivers/ao_lco_func.h b/src/drivers/ao_lco_func.h
index 42754352..6b06f928 100644
--- a/src/drivers/ao_lco_func.h
+++ b/src/drivers/ao_lco_func.h
@@ -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
diff --git a/src/drivers/ao_lco_two.c b/src/drivers/ao_lco_two.c
index f53fef7d..b99e2cd9 100644
--- a/src/drivers/ao_lco_two.c
+++ b/src/drivers/ao_lco_two.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
diff --git a/src/drivers/ao_log_fat.c b/src/drivers/ao_log_fat.c
index 45b67012..62e97868 100644
--- a/src/drivers/ao_log_fat.c
+++ b/src/drivers/ao_log_fat.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
diff --git a/src/drivers/ao_m25.c b/src/drivers/ao_m25.c
index e6c7bb4d..b506b0a7 100644
--- a/src/drivers/ao_m25.c
+++ b/src/drivers/ao_m25.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
diff --git a/src/drivers/ao_mma655x.c b/src/drivers/ao_mma655x.c
index c36858ad..b9f1709c 100644
--- a/src/drivers/ao_mma655x.c
+++ b/src/drivers/ao_mma655x.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
diff --git a/src/drivers/ao_mma655x.h b/src/drivers/ao_mma655x.h
index e57e3377..87f7384d 100644
--- a/src/drivers/ao_mma655x.h
+++ b/src/drivers/ao_mma655x.h
@@ -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
diff --git a/src/drivers/ao_mpu6000.c b/src/drivers/ao_mpu6000.c
index c0458027..650407ad 100644
--- a/src/drivers/ao_mpu6000.c
+++ b/src/drivers/ao_mpu6000.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
diff --git a/src/drivers/ao_mpu6000.h b/src/drivers/ao_mpu6000.h
index dc3a9fbf..ae42d4b4 100644
--- a/src/drivers/ao_mpu6000.h
+++ b/src/drivers/ao_mpu6000.h
@@ -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
diff --git a/src/drivers/ao_mr25.c b/src/drivers/ao_mr25.c
index 53cbf9d7..2d355c9f 100644
--- a/src/drivers/ao_mr25.c
+++ b/src/drivers/ao_mr25.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
diff --git a/src/drivers/ao_ms5607.c b/src/drivers/ao_ms5607.c
index ef31882e..261df67f 100644
--- a/src/drivers/ao_ms5607.c
+++ b/src/drivers/ao_ms5607.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
diff --git a/src/drivers/ao_ms5607.h b/src/drivers/ao_ms5607.h
index b58178fd..18f99bf8 100644
--- a/src/drivers/ao_ms5607.h
+++ b/src/drivers/ao_ms5607.h
@@ -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
diff --git a/src/drivers/ao_ms5607_convert.c b/src/drivers/ao_ms5607_convert.c
index 4d412cbe..0e96f60b 100644
--- a/src/drivers/ao_ms5607_convert.c
+++ b/src/drivers/ao_ms5607_convert.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
diff --git a/src/drivers/ao_ms5607_convert_8051.c b/src/drivers/ao_ms5607_convert_8051.c
index a74086d9..b7081107 100644
--- a/src/drivers/ao_ms5607_convert_8051.c
+++ b/src/drivers/ao_ms5607_convert_8051.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
diff --git a/src/drivers/ao_packet.c b/src/drivers/ao_packet.c
index 18330ead..008af5db 100644
--- a/src/drivers/ao_packet.c
+++ b/src/drivers/ao_packet.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
diff --git a/src/drivers/ao_packet_master.c b/src/drivers/ao_packet_master.c
index 2beda4cb..e63771e5 100644
--- a/src/drivers/ao_packet_master.c
+++ b/src/drivers/ao_packet_master.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
diff --git a/src/drivers/ao_packet_slave.c b/src/drivers/ao_packet_slave.c
index 0872682f..b877128a 100644
--- a/src/drivers/ao_packet_slave.c
+++ b/src/drivers/ao_packet_slave.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
diff --git a/src/drivers/ao_pad.c b/src/drivers/ao_pad.c
index 99a90e77..ffa833fe 100644
--- a/src/drivers/ao_pad.c
+++ b/src/drivers/ao_pad.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
diff --git a/src/drivers/ao_pad.h b/src/drivers/ao_pad.h
index d77d105a..648d3005 100644
--- a/src/drivers/ao_pad.h
+++ b/src/drivers/ao_pad.h
@@ -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
diff --git a/src/drivers/ao_pca9922.c b/src/drivers/ao_pca9922.c
index 6d1b5fae..09f52a0e 100644
--- a/src/drivers/ao_pca9922.c
+++ b/src/drivers/ao_pca9922.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
diff --git a/src/drivers/ao_pwm.h b/src/drivers/ao_pwm.h
index 2dd2ffd5..1751ebfd 100644
--- a/src/drivers/ao_pwm.h
+++ b/src/drivers/ao_pwm.h
@@ -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
diff --git a/src/drivers/ao_pyro_slave.c b/src/drivers/ao_pyro_slave.c
index f07c2cba..a293d929 100644
--- a/src/drivers/ao_pyro_slave.c
+++ b/src/drivers/ao_pyro_slave.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
diff --git a/src/drivers/ao_quadrature.c b/src/drivers/ao_quadrature.c
index 0cdcc9fb..deecfb79 100644
--- a/src/drivers/ao_quadrature.c
+++ b/src/drivers/ao_quadrature.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
diff --git a/src/drivers/ao_quadrature.h b/src/drivers/ao_quadrature.h
index d7dda682..a99e4cc5 100644
--- a/src/drivers/ao_quadrature.h
+++ b/src/drivers/ao_quadrature.h
@@ -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
diff --git a/src/drivers/ao_radio_master.c b/src/drivers/ao_radio_master.c
index 128fcf32..79e4b22b 100644
--- a/src/drivers/ao_radio_master.c
+++ b/src/drivers/ao_radio_master.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
diff --git a/src/drivers/ao_radio_slave.c b/src/drivers/ao_radio_slave.c
index 9a0612e5..2f1dab29 100644
--- a/src/drivers/ao_radio_slave.c
+++ b/src/drivers/ao_radio_slave.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
diff --git a/src/drivers/ao_radio_spi.h b/src/drivers/ao_radio_spi.h
index 2957f70d..9dccdd29 100644
--- a/src/drivers/ao_radio_spi.h
+++ b/src/drivers/ao_radio_spi.h
@@ -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
diff --git a/src/drivers/ao_rfpa0133.c b/src/drivers/ao_rfpa0133.c
index a98e261a..7ef32ef3 100644
--- a/src/drivers/ao_rfpa0133.c
+++ b/src/drivers/ao_rfpa0133.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
diff --git a/src/drivers/ao_rfpa0133.h b/src/drivers/ao_rfpa0133.h
index 2ba7f699..793cdf76 100644
--- a/src/drivers/ao_rfpa0133.h
+++ b/src/drivers/ao_rfpa0133.h
@@ -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
diff --git a/src/drivers/ao_science_slave.c b/src/drivers/ao_science_slave.c
index 996e98d9..775318f9 100644
--- a/src/drivers/ao_science_slave.c
+++ b/src/drivers/ao_science_slave.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
diff --git a/src/drivers/ao_sdcard.c b/src/drivers/ao_sdcard.c
index 47188ef3..4b17c5e3 100644
--- a/src/drivers/ao_sdcard.c
+++ b/src/drivers/ao_sdcard.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
diff --git a/src/drivers/ao_sdcard.h b/src/drivers/ao_sdcard.h
index 50b70c73..8f794efc 100644
--- a/src/drivers/ao_sdcard.h
+++ b/src/drivers/ao_sdcard.h
@@ -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
diff --git a/src/drivers/ao_servo.c b/src/drivers/ao_servo.c
index b48a4112..78978e3e 100644
--- a/src/drivers/ao_servo.c
+++ b/src/drivers/ao_servo.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
diff --git a/src/drivers/ao_servo.h b/src/drivers/ao_servo.h
index e1df347a..23059c44 100644
--- a/src/drivers/ao_servo.h
+++ b/src/drivers/ao_servo.h
@@ -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
diff --git a/src/drivers/ao_seven_segment.c b/src/drivers/ao_seven_segment.c
index f1339ee5..d2e1248f 100644
--- a/src/drivers/ao_seven_segment.c
+++ b/src/drivers/ao_seven_segment.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
diff --git a/src/drivers/ao_seven_segment.h b/src/drivers/ao_seven_segment.h
index f997f3b5..bdac98c7 100644
--- a/src/drivers/ao_seven_segment.h
+++ b/src/drivers/ao_seven_segment.h
@@ -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
diff --git a/src/drivers/ao_trng.c b/src/drivers/ao_trng.c
index e69cd30b..d89cc81a 100644
--- a/src/drivers/ao_trng.c
+++ b/src/drivers/ao_trng.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
diff --git a/src/drivers/ao_trng.h b/src/drivers/ao_trng.h
index 78577428..307a20fd 100644
--- a/src/drivers/ao_trng.h
+++ b/src/drivers/ao_trng.h
@@ -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
diff --git a/src/drivers/ao_trng_send.c b/src/drivers/ao_trng_send.c
index 4ac6ee5e..00efa8d9 100644
--- a/src/drivers/ao_trng_send.c
+++ b/src/drivers/ao_trng_send.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
diff --git a/src/drivers/ao_trng_send.h b/src/drivers/ao_trng_send.h
index 83312d59..4a41637f 100644
--- a/src/drivers/ao_trng_send.h
+++ b/src/drivers/ao_trng_send.h
@@ -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
diff --git a/src/drivers/ao_watchdog.c b/src/drivers/ao_watchdog.c
index 096a5564..1a877fcb 100644
--- a/src/drivers/ao_watchdog.c
+++ b/src/drivers/ao_watchdog.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
diff --git a/src/drivers/ao_watchdog.h b/src/drivers/ao_watchdog.h
index 73e1559d..e40475f6 100644
--- a/src/drivers/ao_watchdog.h
+++ b/src/drivers/ao_watchdog.h
@@ -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