1 files changed, 6 insertions, 1 deletions
diff --git a/avr/gpio.c b/avr/gpio.c
index 31dbc21..73e9c39 100644
--- a/avr/gpio.c
+++ b/avr/gpio.c
@@ -1,10 +1,15 @@
+/*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
 #include "common.h"
 #include <util/atomic.h>
 #include <limits.h>
 #include "debug.h"
 #include "gpio.h"
 
-
 /*
 
 Pin Name    Port    Timer   Mode    max div         max div     min f [Hz]