diff --git a/cpu/mcf5227x/cpu_init.c b/cpu/mcf5227x/cpu_init.c
index d8bcf375c115e938f0f4633d8fa6a66a5b0762a6..e160ee1aff57601f1b56c187d8f43714c3690e09 100644
--- a/cpu/mcf5227x/cpu_init.c
+++ b/cpu/mcf5227x/cpu_init.c
@@ -117,7 +117,6 @@ int cpu_init_r(void)
 #ifdef CONFIG_MCFRTC
 	volatile rtc_t *rtc = (volatile rtc_t *)(CONFIG_SYS_MCFRTC_BASE);
 	volatile rtcex_t *rtcex = (volatile rtcex_t *)&rtc->extended;
-	u32 oscillator = CONFIG_SYS_RTC_OSCILLATOR;
 
 	rtcex->gocu = (CONFIG_SYS_RTC_OSCILLATOR >> 16) & 0xFFFF;
 	rtcex->gocl = CONFIG_SYS_RTC_OSCILLATOR & 0xFFFF;
diff --git a/cpu/mcf532x/cpu_init.c b/cpu/mcf532x/cpu_init.c
index 687c7e42ec4135873939a4e3ff8fd027a4f6c71f..4f1695cef861327b678fbda9c2b5618eeaf46d01 100644
--- a/cpu/mcf532x/cpu_init.c
+++ b/cpu/mcf532x/cpu_init.c
@@ -39,7 +39,6 @@
 void cpu_init_f(void)
 {
 	volatile scm1_t *scm1 = (scm1_t *) MMAP_SCM1;
-	volatile scm2_t *scm2 = (scm2_t *) MMAP_SCM2;
 	volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
 	volatile fbcs_t *fbcs = (fbcs_t *) MMAP_FBCS;
 
diff --git a/drivers/dma/MCD_dmaApi.c b/drivers/dma/MCD_dmaApi.c
index 5c95651d5805fc562cb665e53ae504bc1dcf1a1f..0dd38168f337b58fa01a4a734c8e5cde263b4b8a 100644
--- a/drivers/dma/MCD_dmaApi.c
+++ b/drivers/dma/MCD_dmaApi.c
@@ -486,7 +486,8 @@ int MCD_startDma(int channel, s8 * srcAddr, s16 srcIncr, s8 * destAddr,
 		    MCD_modelTaskTable[TASK_FECTX].TDTstart;
 		MCD_taskTable[channel].TDTend =
 		    MCD_modelTaskTable[TASK_FECTX].TDTend;
-		MCD_startDmaENetXmit(srcAddr, srcAddr, destAddr, MCD_taskTable,
+		MCD_startDmaENetXmit((char *)srcAddr, (char *)srcAddr,
+				     (char *)destAddr, MCD_taskTable,
 				     channel);
 	} else if (flags & MCD_FECRX_DMA) {
 		/* TDTStart and TDTEnd */
@@ -494,7 +495,8 @@ int MCD_startDma(int channel, s8 * srcAddr, s16 srcIncr, s8 * destAddr,
 		    MCD_modelTaskTable[TASK_FECRX].TDTstart;
 		MCD_taskTable[channel].TDTend =
 		    MCD_modelTaskTable[TASK_FECRX].TDTend;
-		MCD_startDmaENetRcv(srcAddr, srcAddr, destAddr, MCD_taskTable,
+		MCD_startDmaENetRcv((char *)srcAddr, (char *)srcAddr,
+				    (char *)destAddr, MCD_taskTable,
 				    channel);
 	} else if (flags & MCD_SINGLE_DMA) {
 		/* this buffer descriptor is used for storing off initial
@@ -532,8 +534,9 @@ int MCD_startDma(int channel, s8 * srcAddr, s16 srcIncr, s8 * destAddr,
 			    MCD_modelTaskTable[TASK_SINGLENOEU].TDTstart;
 			MCD_taskTable[channel].TDTend =
 			    MCD_modelTaskTable[TASK_SINGLENOEU].TDTend;
-			MCD_startDmaSingleNoEu(srcAddr, srcIncr, destAddr,
-					       destIncr, dmaSize, xferSizeIncr,
+			MCD_startDmaSingleNoEu((char *)srcAddr, srcIncr,
+					       (char *)destAddr, destIncr,
+					       (int)dmaSize, xferSizeIncr,
 					       flags, (int *)
 					       &(MCD_relocBuffDesc[channel]),
 					       cSave, MCD_taskTable, channel);
@@ -543,8 +546,9 @@ int MCD_startDma(int channel, s8 * srcAddr, s16 srcIncr, s8 * destAddr,
 			    MCD_modelTaskTable[TASK_SINGLEEU].TDTstart;
 			MCD_taskTable[channel].TDTend =
 			    MCD_modelTaskTable[TASK_SINGLEEU].TDTend;
-			MCD_startDmaSingleEu(srcAddr, srcIncr, destAddr,
-					     destIncr, dmaSize, xferSizeIncr,
+			MCD_startDmaSingleEu((char *)srcAddr, srcIncr,
+					     (char *)destAddr, destIncr,
+					     (int)dmaSize, xferSizeIncr,
 					     flags, (int *)
 					     &(MCD_relocBuffDesc[channel]),
 					     cSave, MCD_taskTable, channel);