diff --git a/cpu/nios2/epcs.c b/cpu/nios2/epcs.c
index a2e3fe3..ab7d746 100644
--- a/cpu/nios2/epcs.c
+++ b/cpu/nios2/epcs.c
@@ -85,7 +85,7 @@
 
 	if (assert) {
 		tmp = readl (&epcs->control);
-		writel (&epcs->control, tmp | NIOS_SPI_SSO);
+		writel (tmp | NIOS_SPI_SSO, &epcs->control);
 	} else {
 		/* Let all bits shift out */
 		start = get_timer (0);
@@ -93,7 +93,7 @@
 			if (get_timer (start) > EPCS_TIMEOUT)
 				return (-1);
 		tmp = readl (&epcs->control);
-		writel (&epcs->control, tmp & ~NIOS_SPI_SSO);
+		writel (tmp & ~NIOS_SPI_SSO, &epcs->control);
 	}
 	return (0);
 }
@@ -106,7 +106,7 @@
 	while ((readl (&epcs->status) & NIOS_SPI_TRDY) == 0)
 		if (get_timer (start) > EPCS_TIMEOUT)
 			return (-1);
-	writel (&epcs->txdata, c);
+	writel (c, &epcs->txdata);
 	return (0);
 }
 
diff --git a/cpu/nios2/interrupts.c b/cpu/nios2/interrupts.c
index 1c3566e..5c3b5e6 100644
--- a/cpu/nios2/interrupts.c
+++ b/cpu/nios2/interrupts.c
@@ -81,7 +81,7 @@
 	/* Interrupt is cleared by writing anything to the
 	 * status register.
 	 */
-	writel (&tmr->status, 0);
+	writel (0, &tmr->status);
 	timestamp += CONFIG_SYS_NIOS_TMRMS;
 #ifdef CONFIG_STATUS_LED
 	status_led_tick(timestamp);
@@ -92,16 +92,16 @@
 {
 	nios_timer_t *tmr =(nios_timer_t *)CONFIG_SYS_NIOS_TMRBASE;
 
-	writel (&tmr->status, 0);
-	writel (&tmr->control, 0);
-	writel (&tmr->control, NIOS_TIMER_STOP);
+	writel (0, &tmr->status);
+	writel (0, &tmr->control);
+	writel (NIOS_TIMER_STOP, &tmr->control);
 
 #if defined(CONFIG_SYS_NIOS_TMRCNT)
-	writel (&tmr->periodl, CONFIG_SYS_NIOS_TMRCNT & 0xffff);
-	writel (&tmr->periodh, (CONFIG_SYS_NIOS_TMRCNT >> 16) & 0xffff);
+	writel (CONFIG_SYS_NIOS_TMRCNT & 0xffff, &tmr->periodl);
+	writel ((CONFIG_SYS_NIOS_TMRCNT >> 16) & 0xffff, &tmr->periodh);
 #endif
-	writel (&tmr->control, NIOS_TIMER_ITO | NIOS_TIMER_CONT |
-			  NIOS_TIMER_START );
+	writel (NIOS_TIMER_ITO | NIOS_TIMER_CONT | NIOS_TIMER_START,
+			&tmr->control);
 	irq_install_handler (CONFIG_SYS_NIOS_TMRIRQ, tmr_isr, (void *)tmr);
 }