diff --git a/cpu/lm4f120/periph/timer.c b/cpu/lm4f120/periph/timer.c
index 3641e0bb2c..9c2b671ad5 100644
--- a/cpu/lm4f120/periph/timer.c
+++ b/cpu/lm4f120/periph/timer.c
@@ -43,7 +43,7 @@ static timer_conf_t config[TIMER_NUMOF];
 int timer_init(tim_t dev, unsigned int us_per_tick, void (*callback)(int))
 {
     if (dev == TIMER_0) {
-        config[dev].cb = callback;                          // User Function 
+        config[dev].cb = callback;                          // User Function
         ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_WTIMER0);  // Activate Timer0
         WTIMER0_CTL_R &= ~0x00000001;                       // Disable timer0A during setup
         WTIMER0_CFG_R  = TIMER_CFG_16_BIT;
@@ -153,7 +153,7 @@ void isr_timer0(void)
 void isr_wtimer0(void)
 {
     WTIMER0_ICR_R = TIMER_ICR_TATOCINT; // acknowledge timer0A timeout
-    
+
     config[TIMER_0].cb(0);
     if (sched_context_switch_request){
         thread_yield();
diff --git a/cpu/lm4f120/periph/uart.c b/cpu/lm4f120/periph/uart.c
index 56c3b16414..e47175fc4d 100644
--- a/cpu/lm4f120/periph/uart.c
+++ b/cpu/lm4f120/periph/uart.c
@@ -114,7 +114,7 @@ int uart_init(uart_t uart, uint32_t baudrate, uart_rx_cb_t rx_cb, uart_tx_cb_t t
             ROM_UARTTxIntModeSet(UART0_BASE, UART_TXINT_MODE_EOT);
             ROM_UARTFIFOLevelSet(UART0_BASE, UART_FIFO_TX4_8, UART_FIFO_RX4_8); // Set FIFO to 8 Characters
             ROM_UARTFIFOEnable(UART0_BASE); // Enable FIFOs
-            
+
             // Enable the UART interrupt
             NVIC_EnableIRQ(UART_0_IRQ_CHAN);
             // Enable RX interrupt
diff --git a/cpu/stellaris_common/include/cortex-m4-def.h b/cpu/stellaris_common/include/cortex-m4-def.h
index f0580d87da..963c7e5828 100644
--- a/cpu/stellaris_common/include/cortex-m4-def.h
+++ b/cpu/stellaris_common/include/cortex-m4-def.h
@@ -4,23 +4,23 @@
 //
 // Copyright (c) 2011-2012 Texas Instruments Incorporated.  All rights reserved.
 // Software License Agreement
-// 
+//
 //   Redistribution and use in source and binary forms, with or without
 //   modification, are permitted provided that the following conditions
 //   are met:
-// 
+//
 //   Redistributions of source code must retain the above copyright
 //   notice, this list of conditions and the following disclaimer.
-// 
+//
 //   Redistributions in binary form must reproduce the above copyright
 //   notice, this list of conditions and the following disclaimer in the
-//   documentation and/or other materials provided with the  
+//   documentation and/or other materials provided with the
 //   distribution.
-// 
+//
 //   Neither the name of Texas Instruments Incorporated nor the names of
 //   its contributors may be used to endorse or promote products derived
 //   from this software without specific prior written permission.
-// 
+//
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -32,7 +32,7 @@
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-// 
+//
 // This is part of revision 9453 of the Stellaris Firmware Development Package.
 //
 //*****************************************************************************