[U-Boot] [PATCH] i.MX28: Enable SD DMA only if DCache enabled

[Fabio Estevam]

On Wed, Apr 4, 2012 at 9:48 PM, Marek Vasut <marex at denx.de> wrote:

>> Someone may want to enable cache, but still uses MMC driver in PIO mode.
>
> You don't, it's slow as crap then.

Well, this is how we have been using the MMC driver for the last 4 months.

I like the fact that your patch let PIO and DMA mode co-exist in the
driver and that they are selectable by the CONFIG_MXS_MMC_DMA option.

What I really don´t like is that by enabling CONFIG_SYS_DCACHE_OFF you
force CONFIG_MXS_MMC_DMA.

These are separate things and one config option should not force the other.