? 2012?11?15? 15:22, Lauri Hintsala ??:

Hi,

On 11/15/2012 05:20 AM, Huang Shijie wrote:

quoted

? 2012?11?13? 17:42, Lauri Hintsala ??:

quoted

Hi Huang,

DMA support doesn't work with latest stable v3.6.5 or development
3.7-rc5 kernels. I get following error message when I open the serial
port /dev/ttyAPP0:

[ 48.730000] mxs-auart 8006a000.serial: step 1 error
[ 48.750000] mxs-auart 8006a000.serial: We can not start up the DMA.

I tested this patch set in imx28-evk board Rev C with 
linux-next-20121114.
it works fine.

Maybe you can try the linux-next code.

I tested linux-next-20121114 on apx4devkit (imx28 based device) and I 
got the same error message:

# stty -F /dev/ttyAPP0 crtscts; microcom /dev/ttyAPP0 -s 115200
[  133.710000] mxs-auart 8006a000.serial: step 1 error
[  133.720000] mxs-auart 8006a000.serial: We can not start up the DMA.

Could you test this patch?

thanks
Huang  Shijie
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