[ARM] 4660/3: at91: allow selecting UART for early kernel messages

Currently early kernel messages, i.e., those from uncompression, go to the
debugging UART. And if it is enabled in the platform configuration, but
not initialized by the bootloader, the machine hangs, waiting for UART
status change. Besides, having those messages on another UART - typically
the console UART - may be preferrable. This patch allows selecting the
UART in kernel configuration.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/asm-arm/arch-at91/at91sam9rl.h b/include/asm-arm/arch-at91/at91sam9rl.h
index 8a9708a370c6..16d2832f6c0a 100644
--- a/include/asm-arm/arch-at91/at91sam9rl.h
+++ b/include/asm-arm/arch-at91/at91sam9rl.h
@@ -94,6 +94,11 @@
 #define AT91_GPBR       (0xfffffd60 - AT91_BASE_SYS)
 #define AT91_RTC        (0xfffffe00 - AT91_BASE_SYS)
 
+#define AT91_USART0     AT91SAM9RL_BASE_US0
+#define AT91_USART1     AT91SAM9RL_BASE_US1
+#define AT91_USART2     AT91SAM9RL_BASE_US2
+#define AT91_USART3     AT91SAM9RL_BASE_US3
+
 
 /*
  * Internal Memory.