[ts-7000] Spi and dma support

["greywolf9923" <>]

Hi all,

I uploaded a new file "ep93xx_spi_patch_2.6.27.7.patch". It's based on
the work of Matthieu Crapet. It's only a *preliminary* support.
Improvement against Matthieu patch:

 - spi driver has now a workqueue to manage the transfer
 - management of the max spi speed
 - added the clock for ssp
 - added preliminary support for dma

In the next round I'd like to add dma support to the spi driver to
improve the performance. Any comments are welcome.

Ps for Matt: if you like it would be great if you add this work in
your patch.

Regards,

Marco


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