diff --git a/drivers/renesas/rcar/console/rcar_console.S b/drivers/renesas/rcar/console/rcar_console.S
index 4d006b7..29baa67 100644
--- a/drivers/renesas/rcar/console/rcar_console.S
+++ b/drivers/renesas/rcar/console/rcar_console.S
@@ -82,15 +82,12 @@
 endfunc console_rcar_putc
 
 	/* ---------------------------------------------
-	 * int console_rcar_flush(void)
+	 * void console_rcar_flush(void)
 	 * Function to force a write of all buffered
-	 * data that hasn't been output. It returns 0
-	 * upon successful completion, otherwise it
-	 * returns -1.
+	 * data that hasn't been output. It returns void
 	 * Clobber list : x0, x1
 	 * ---------------------------------------------
 	 */
 func console_rcar_flush
-	mov	w0, #0
 	ret
 endfunc console_rcar_flush
diff --git a/drivers/renesas/rcar/scif/scif.S b/drivers/renesas/rcar/scif/scif.S
index 064aba4..ae26cc4 100644
--- a/drivers/renesas/rcar/scif/scif.S
+++ b/drivers/renesas/rcar/scif/scif.S
@@ -305,11 +305,9 @@
 endfunc console_rcar_putc
 
 	/* ---------------------------------------------
-	 * int console_rcar_flush(void)
+	 * void console_rcar_flush(void)
 	 * Function to force a write of all buffered
-	 * data that hasn't been output. It returns 0
-	 * upon successful completion, otherwise it
-	 * returns -1.
+	 * data that hasn't been output. It returns void
 	 * Clobber list : x0, x1
 	 * ---------------------------------------------
 	 */
@@ -327,6 +325,5 @@
 	and	w1, w1, #~(SCSCR_TE_EN + SCSCR_RE_EN)
 	strh	w1, [x0, #SCIF_SCSCR]
 
-	mov	w0, #0
 	ret
 endfunc console_rcar_flush