mmc: sh_mmcif: add DMA support

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The MMCIF controller on sh-mobile platforms can use the DMA controller for data
transfers. Interface to the SH dmaengine driver to enable DMA. We also have to
lower the maximum number of segments to match with the number od DMA
descriptors on SuperH, this doesn't significantly affect driver's PIO
performance.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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Guennadi Liakhovetski 2010-11-24 10:05:22 +00:00 • committed by Paul Mundt

parent e47bf32aa8

commit a782d688e9

3 changed files with 258 additions and 9 deletions

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6

drivers/mmc/host/Kconfig

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246

drivers/mmc/host/sh_mmcif.c

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15

include/linux/mmc/sh_mmcif.h

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