[PATCH v2] ARM: zynq: Fix earlyprintk in big endian mode
Michal Simek
michal.simek at xilinx.com
Fri Jun 12 02:25:17 PDT 2015
On 06/12/2015 08:53 AM, Arun Chandran wrote:
> earlyprintk messages are not appearing on the terminal
> emulator during a big endian kernel boot. In BE mode
> sending full words to UART will result in unprintable
> characters as they are byte swapped versions of printable
> ones. So send only bytes.
>
> Signed-off-by: Arun Chandran <achandran at mvista.com>
> ---
> ---
> Changes since v1:
> removed the byte swapping logic. Just send characters instead.
> ---
> arch/arm/include/debug/zynq.S | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/include/debug/zynq.S b/arch/arm/include/debug/zynq.S
> index bd13ded..de86b92 100644
> --- a/arch/arm/include/debug/zynq.S
> +++ b/arch/arm/include/debug/zynq.S
> @@ -38,7 +38,7 @@
> .endm
>
> .macro senduart,rd,rx
> - str \rd, [\rx, #UART_FIFO_OFFSET] @ TXDATA
> + strb \rd, [\rx, #UART_FIFO_OFFSET] @ TXDATA
> .endm
>
> .macro waituart,rd,rx
>
ok - this works too.
Tested-by: Michal Simek <michal.simek at xilinx.com>
Thanks,
Michal
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