diff --git a/drivers/gpio/at91_gpio.c b/drivers/gpio/at91_gpio.c
index c0a97bc..1631687 100644
--- a/drivers/gpio/at91_gpio.c
+++ b/drivers/gpio/at91_gpio.c
@@ -24,6 +24,16 @@
  * MA 02111-1307 USA
  */
 
+/*
+ * WARNING:
+ *
+ * As the code is right now, it expects all PIO ports A,B,C,...
+ * to be evenly spaced in the memory map:
+ * ATMEL_BASE_PIOA + port * sizeof at91pio_t
+ * This might not necessaryly be true in future Atmel SoCs.
+ * This code should be fixed to use a pointer array to the ports.
+ */
+
 #include <config.h>
 #include <common.h>
 #include <asm/sizes.h>
@@ -33,10 +43,10 @@
 
 int at91_set_pio_pullup(unsigned port, unsigned pin, int use_pullup)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		if (use_pullup)
 			writel(1 << pin, &pio->port[port].puer);
@@ -52,10 +62,10 @@ int at91_set_pio_pullup(unsigned port, unsigned pin, int use_pullup)
  */
 int at91_set_pio_periph(unsigned port, unsigned pin, int use_pullup)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		writel(mask, &pio->port[port].idr);
 		at91_set_pio_pullup(port, pin, use_pullup);
@@ -69,10 +79,10 @@ int at91_set_pio_periph(unsigned port, unsigned pin, int use_pullup)
  */
 int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		writel(mask, &pio->port[port].idr);
 		at91_set_pio_pullup(port, pin, use_pullup);
@@ -87,10 +97,10 @@ int at91_set_a_periph(unsigned port, unsigned pin, int use_pullup)
  */
 int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		writel(mask, &pio->port[port].idr);
 		at91_set_pio_pullup(port, pin, use_pullup);
@@ -106,10 +116,10 @@ int at91_set_b_periph(unsigned port, unsigned pin, int use_pullup)
  */
 int at91_set_pio_input(unsigned port, u32 pin, int use_pullup)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		writel(mask, &pio->port[port].idr);
 		at91_set_pio_pullup(port, pin, use_pullup);
@@ -125,10 +135,10 @@ int at91_set_pio_input(unsigned port, u32 pin, int use_pullup)
  */
 int at91_set_pio_output(unsigned port, u32 pin, int value)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		writel(mask, &pio->port[port].idr);
 		writel(mask, &pio->port[port].pudr);
@@ -147,10 +157,10 @@ int at91_set_pio_output(unsigned port, u32 pin, int value)
  */
 int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		if (is_on)
 			writel(mask, &pio->port[port].ifer);
@@ -166,10 +176,10 @@ int at91_set_pio_deglitch(unsigned port, unsigned pin, int is_on)
  */
 int at91_set_pio_multi_drive(unsigned port, unsigned pin, int is_on)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		if (is_on)
 			writel(mask, &pio->port[port].mder);
@@ -184,10 +194,10 @@ int at91_set_pio_multi_drive(unsigned port, unsigned pin, int is_on)
  */
 int at91_set_pio_value(unsigned port, unsigned pin, int value)
 {
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		if (value)
 			writel(mask, &pio->port[port].sodr);
@@ -202,11 +212,11 @@ int at91_set_pio_value(unsigned port, unsigned pin, int value)
  */
 int at91_get_pio_value(unsigned port, unsigned pin)
 {
-	u32		pdsr	= 0;
-	at91_pio_t	*pio 	= (at91_pio_t *) AT91_PIO_BASE;
+	u32		pdsr = 0;
+	at91_pio_t	*pio = (at91_pio_t *) ATMEL_BASE_PIOA;
 	u32		mask;
 
-	if ((port < AT91_PIO_PORTS) && (pin < 32)) {
+	if ((port < ATMEL_PIO_PORTS) && (pin < 32)) {
 		mask = 1 << pin;
 		pdsr = readl(&pio->port[port].pdsr) & mask;
 	}
diff --git a/drivers/rtc/at91sam9_rtt.c b/drivers/rtc/at91sam9_rtt.c
index de8e30d..ed44016 100644
--- a/drivers/rtc/at91sam9_rtt.c
+++ b/drivers/rtc/at91sam9_rtt.c
@@ -48,8 +48,8 @@
 
 int rtc_get (struct rtc_time *tmp)
 {
-	at91_rtt_t *rtt = (at91_rtt_t *) AT91_RTT_BASE;
-	at91_gpbr_t *gpbr = (at91_gpbr_t *) AT91_GPR_BASE;
+	at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
+	at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
 	ulong tim;
 	ulong tim2;
 	ulong off;
@@ -66,8 +66,8 @@ int rtc_get (struct rtc_time *tmp)
 
 int rtc_set (struct rtc_time *tmp)
 {
-	at91_rtt_t *rtt = (at91_rtt_t *) AT91_RTT_BASE;
-	at91_gpbr_t *gpbr = (at91_gpbr_t *) AT91_GPR_BASE;
+	at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
+	at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
 	ulong tim;
 
 	tim = mktime (tmp->tm_year, tmp->tm_mon, tmp->tm_mday,
@@ -85,8 +85,8 @@ int rtc_set (struct rtc_time *tmp)
 
 void rtc_reset (void)
 {
-	at91_rtt_t *rtt = (at91_rtt_t *) AT91_RTT_BASE;
-	at91_gpbr_t *gpbr = (at91_gpbr_t *) AT91_GPR_BASE;
+	at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
+	at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
 
 	/* clear alarm, set prescaler to 32768, clear counter */
 	writel(32768+AT91_RTT_RTTRST, &rtt->mr);
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c
index 64fde68..6166899 100644
--- a/drivers/usb/host/ohci-at91.c
+++ b/drivers/usb/host/ohci-at91.c
@@ -32,7 +32,7 @@
 
 int usb_cpu_init(void)
 {
-	at91_pmc_t *pmc	= (at91_pmc_t *)AT91_PMC_BASE;
+	at91_pmc_t *pmc	= (at91_pmc_t *)ATMEL_BASE_PMC;
 
 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
     defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
@@ -53,11 +53,11 @@ int usb_cpu_init(void)
 #endif
 
 	/* Enable USB host clock. */
-	writel(1 << AT91_ID_UHP, &pmc->pcer);
+	writel(1 << ATMEL_ID_UHP, &pmc->pcer);
 #ifdef CONFIG_AT91SAM9261
-	writel(AT91_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
+	writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scer);
 #else
-	writel(AT91_PMC_UHP, &pmc->scer);
+	writel(ATMEL_PMC_UHP, &pmc->scer);
 #endif
 
 	return 0;
@@ -65,14 +65,14 @@ int usb_cpu_init(void)
 
 int usb_cpu_stop(void)
 {
-	at91_pmc_t *pmc	= (at91_pmc_t *)AT91_PMC_BASE;
+	at91_pmc_t *pmc	= (at91_pmc_t *)ATMEL_BASE_PMC;
 
 	/* Disable USB host clock. */
-	writel(1 << AT91_ID_UHP, &pmc->pcdr);
+	writel(1 << ATMEL_ID_UHP, &pmc->pcdr);
 #ifdef CONFIG_AT91SAM9261
-	writel(AT91_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
+	writel(ATMEL_PMC_UHP | AT91_PMC_HCK0, &pmc->scdr);
 #else
-	writel(AT91_PMC_UHP, &pmc->scdr);
+	writel(ATMEL_PMC_UHP, &pmc->scdr);
 #endif
 
 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index 25afae7..6254765 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -42,7 +42,7 @@
 static int at91_wdt_settimeout(unsigned int timeout)
 {
 	unsigned int reg;
-	at91_wdt_t *wd 	= (at91_wdt_t *) AT91_WDT_BASE;
+	at91_wdt_t *wd = (at91_wdt_t *) ATMEL_BASE_WDT;
 
 	/* Check if disabled */
 	if (readl(&wd->mr) & AT91_WDT_MR_WDDIS) {
@@ -69,7 +69,7 @@ static int at91_wdt_settimeout(unsigned int timeout)
 
 void hw_watchdog_reset(void)
 {
-	at91_wdt_t *wd 	= (at91_wdt_t *) AT91_WDT_BASE;
+	at91_wdt_t *wd = (at91_wdt_t *) ATMEL_BASE_WDT;
 	writel(AT91_WDT_CR_WDRSTT | AT91_WDT_CR_KEY, &wd->cr);
 }
 
