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 <[email protected]> --- 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 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
