diff --git a/arch/arm/mach-at91/include/mach/hardware.h b/arch/arm/mach-at91/include/mach/hardware.h
index 711a7892d33..a832e070761 100644
--- a/arch/arm/mach-at91/include/mach/hardware.h
+++ b/arch/arm/mach-at91/include/mach/hardware.h
@@ -90,9 +90,6 @@
 #define AT91_SRAM_MAX		SZ_1M
 #define AT91_VIRT_BASE		(AT91_IO_VIRT_BASE - AT91_SRAM_MAX)
 
-/* Serial ports */
-#define ATMEL_MAX_UART		7		/* 6 USART3's and one DBGU port (SAM9260) */
-
 /* External Memory Map */
 #define AT91_CHIPSELECT_0	0x10000000
 #define AT91_CHIPSELECT_1	0x20000000
diff --git a/arch/avr32/mach-at32ap/include/mach/board.h b/arch/avr32/mach-at32ap/include/mach/board.h
index dca93450cb0..d485b039135 100644
--- a/arch/avr32/mach-at32ap/include/mach/board.h
+++ b/arch/avr32/mach-at32ap/include/mach/board.h
@@ -26,7 +26,6 @@ static inline void __deprecated at32_add_system_devices(void)
 
 }
 
-#define ATMEL_MAX_UART	4
 extern struct platform_device *atmel_default_console_device;
 
 /* Flags for selecting USART extra pins */
diff --git a/include/linux/platform_data/atmel.h b/include/linux/platform_data/atmel.h
index dbd6d53cc27..6a293b7fff3 100644
--- a/include/linux/platform_data/atmel.h
+++ b/include/linux/platform_data/atmel.h
@@ -19,6 +19,12 @@
 #include <linux/serial.h>
 #include <linux/platform_data/macb.h>
 
+/*
+ * at91: 6 USARTs and one DBGU port (SAM9260)
+ * avr32: 4
+ */
+#define ATMEL_MAX_UART	7
+
  /* USB Device */
 struct at91_udc_data {
 	int	vbus_pin;		/* high == host powering us */