[PATCH v2 1/5] MIPS: rzx50: prepare for new debug_ll

[Antony Pavlov]

Set DEBUG_LL_UART_DIVISOR to use <asm/debug_ll_ns16550.h>.

The JZ4755 uses 24 MHz as the main reference frequency (EXCLK).
The UART controller can work on full EXCLK or on EXCLK/2.
Just now we use EXCLK/2 legacy clock setup made by U-Boot.
So set UART controller base frequency to 12 MHz.

Signed-off-by: Antony Pavlov <antonynpavlov at gmail.com>
---
 arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h b/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
index 7bf66b1..2a55dea 100644
--- a/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
+++ b/arch/mips/mach-xburst/include/mach/debug_ll_jz4750d.h
@@ -34,4 +34,8 @@
 
 #define DEBUG_LL_UART_SHIFT	2
 
+#define DEBUG_LL_UART_CLK	(12000000 / 16)
+#define DEBUG_LL_UART_BPS	CONFIG_BAUDRATE
+#define DEBUG_LL_UART_DIVISOR	(DEBUG_LL_UART_CLK / DEBUG_LL_UART_BPS)
+
 #endif /* __INCLUDE_DEBUG_LL_JZ4750D_H__ */
-- 
1.7.10.4