[PATCH v2] mxcmmc: use dmaengine API

On Friday 18 February 2011, Sascha Hauer wrote:

This switches the mxcmmc driver to use the dmaengine API. Unlike
the old one this one is always present in the tree, even if no DMA
is implemented, hence we can remove all the #ifdefs in from the driver.
The driver automatically switches to PIO mode if no DMA support or no
suitable channel is available.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The patch looks good to me, but shouldn't you also add a Kconfig
dependency or select on CONFIG_DMA_ENGINE? I don't see where that
gets set.

Acked-by: Arnd Bergmann <arnd@arndb.de>

Arnd recognized that it's not a good idea that the driver has to
know about the dmaengine implementation (the struct imx_dma_data field).
I have a patch in my queue fixing this, but as this has to be
synchronized with the platform code, I'd like to address this in a later
patch.

Sounds good, since this patch is definitely a step forward.

	Arnd