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2012-05-19spi/rspi: add dmaengine supportShimoda, Yoshihiro1-0/+31
This patch adds dmaengine supporting using sh_dma driver. The module receives data by DMAC, it also needs TX DMAC to generate SPI's clocks. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>