From 01f77433a8872b63619a135e15247de98c6441d5 Mon Sep 17 00:00:00 2001
From: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Date: Thu, 22 Aug 2019 11:54:43 +0200
Subject: [PATCH] cpu/nrf51: Updated i2c_release()

---
 cpu/nrf51/periph/i2c.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cpu/nrf51/periph/i2c.c b/cpu/nrf51/periph/i2c.c
index d532476111..68c10b7a46 100644
--- a/cpu/nrf51/periph/i2c.c
+++ b/cpu/nrf51/periph/i2c.c
@@ -28,6 +28,7 @@
  *
  * @}
  */
+#include <assert.h>
 #include <errno.h>
 #include "cpu.h"
 #include "mutex.h"
@@ -139,12 +140,11 @@ int i2c_acquire(i2c_t dev)
     return 0;
 }
 
-int i2c_release(i2c_t dev)
+void i2c_release(i2c_t dev)
 {
     assert(dev < I2C_NUMOF);
 
     mutex_unlock(&locks[dev]);
-    return 0;
 }
 
 int i2c_read_bytes(i2c_t dev, uint16_t address, void *data, size_t length,