Hi,
I have tested the new driver using DMA mode on our custom DM355 board. I
replaced the linux 2.6.32 spi driver by this driver and it seemed to
work except for on point. The dm355 spi polling mode was correctly
working but the DMA mode was causing some communication problems. It
appeared that when dm355 was reading on the spi, it was actually
resending received data to our slave device on the spi bus, i didn't
fully checked what i am saying i am just supposing that it's what
occured. Anyway the behaviour was different in DMA and polling mode. I
didn't dig deep into the driver i just solved the problem (quick and
dirty) by setting tx buffer to zero in the spidev driver.
The problem can be caused by using SPIDAT as dma buffer when the tx
buffer is empty.
(If it helps i have tested before the spi patch V5 from Brian Niebuhr
and the problem was already there)
So is this a bug or a feature ?
I don't have time right know to work on that problem but i can test
solutions if anyone have.
Regards.
Pierre
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