[PATCH] MIPS: DEBUG_LL_UART_DIVISOR is 0, use a0 instead

[Du Huanpeng]

this make it possiable pass a0 as divisor to calculate uart baudrate
in run time on boot.

Signed-off-by: Du Huanpeng <u74147 at gmail.com>
---
 arch/mips/include/asm/debug_ll_ns16550.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/include/asm/debug_ll_ns16550.h b/arch/mips/include/asm/debug_ll_ns16550.h
index df58c4c..a33587a 100644
--- a/arch/mips/include/asm/debug_ll_ns16550.h
+++ b/arch/mips/include/asm/debug_ll_ns16550.h
@@ -66,6 +66,9 @@ static inline void PUTC_LL(char ch)
 	sb	t1, UART_LCR(t0)		/* Write it out */
 
 	li	t1, DEBUG_LL_UART_DIVISOR
+#if DEBUG_LL_UART_DIVISOR == 0
+	move	t1, a0
+#endif
 	sb	t1, UART_DLL(t0)		/* write low order byte */
 	srl	t1, t1, 8
 	sb	t1, UART_DLM(t0)		/* write high order byte */
-- 
2.7.4