Re: [PATCH RFT] spi: mpc512x-psc: Refactor to use core message parsing

[Gerhard Sittig <gsi@xxxxxxx>]

On Thu, 2014-03-27 at 18:20 +0000, Mark Brown wrote:
> 
> Can you try turning the
> tracepoints on and see if they show where the delays are?  Both the
> message pump and transfer loops have a reasonable number of tracepoints
> in them.

I did a 'dd if=/dev/mtd6 bs=1K' on an m25p80 chip.  Gathered
traces suggest that each 1KB block leads to two transfers.  The
second (the data part) takes several milliseconds (saw some
3-10ms for 1024 bytes :-O ).  But I fail to see what might take
this long.  Will need to dig deeper.


virtually yours
Gerhard Sittig
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