[ARM] 4663/1: Only putc uncompressor output into FFUART if it was enabled by the bootloader

Also, use existing register and bit definitions instead of numbers.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/asm-arm/arch-pxa/uncompress.h b/include/asm-arm/arch-pxa/uncompress.h
index 178aa2e073a..3faad53a684 100644
--- a/include/asm-arm/arch-pxa/uncompress.h
+++ b/include/asm-arm/arch-pxa/uncompress.h
@@ -9,6 +9,9 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/serial_reg.h>
+#include <asm/arch/pxa-regs.h>
+
 #define FFUART          ((volatile unsigned long *)0x40100000)
 #define BTUART          ((volatile unsigned long *)0x40200000)
 #define STUART          ((volatile unsigned long *)0x40700000)
@@ -19,9 +22,11 @@
 
 static inline void putc(char c)
 {
-        while (!(UART[5] & 0x20))
+        if (!(UART[UART_IER] & IER_UUE))
+                return;
+        while (!(UART[UART_LSR] & LSR_TDRQ))
                 barrier();
-        UART[0] = c;
+        UART[UART_TX] = c;
 }
 
 /*