diff --git a/drivers/serial/atmel_usart.c b/drivers/serial/atmel_usart.c
index bfa1f3a..e326b2b 100644
--- a/drivers/serial/atmel_usart.c
+++ b/drivers/serial/atmel_usart.c
@@ -23,21 +23,7 @@
 
 #include <asm/io.h>
 #include <asm/arch/clk.h>
-#include <asm/arch/memory-map.h>
-
-#if defined(CONFIG_USART0)
-# define USART_ID	0
-# define USART_BASE	USART0_BASE
-#elif defined(CONFIG_USART1)
-# define USART_ID	1
-# define USART_BASE	USART1_BASE
-#elif defined(CONFIG_USART2)
-# define USART_ID	2
-# define USART_BASE	USART2_BASE
-#elif defined(CONFIG_USART3)
-# define USART_ID	3
-# define USART_BASE	USART3_BASE
-#endif
+#include <asm/arch/hardware.h>
 
 #include "atmel_usart.h"
 
@@ -45,7 +31,7 @@
 
 void serial_setbrg(void)
 {
-	atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 	unsigned long divisor;
 	unsigned long usart_hz;
 
@@ -54,14 +40,14 @@
 	 * Baud Rate = --------------
 	 *                16 * CD
 	 */
-	usart_hz = get_usart_clk_rate(USART_ID);
+	usart_hz = get_usart_clk_rate(CONFIG_USART_ID);
 	divisor = (usart_hz / 16 + gd->baudrate / 2) / gd->baudrate;
 	writel(USART3_BF(CD, divisor), &usart->brgr);
 }
 
 int serial_init(void)
 {
-	atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
 	writel(USART3_BIT(RSTRX) | USART3_BIT(RSTTX), &usart->cr);
 
@@ -80,7 +66,7 @@
 
 void serial_putc(char c)
 {
-	atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
 	if (c == '\n')
 		serial_putc('\r');
@@ -97,7 +83,7 @@
 
 int serial_getc(void)
 {
-	atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 
 	while (!(readl(&usart->csr) & USART3_BIT(RXRDY)))
 		 WATCHDOG_RESET();
@@ -106,6 +92,6 @@
 
 int serial_tstc(void)
 {
-	atmel_usart3_t *usart = (atmel_usart3_t*)USART_BASE;
+	atmel_usart3_t *usart = (atmel_usart3_t *)CONFIG_USART_BASE;
 	return (readl(&usart->csr) & USART3_BIT(RXRDY)) != 0;
 }