Re: Is anyone working on SD/MMC driver for i.MX35 ?

[Anton Vorontsov <cbouatmailru@gmail.com>]

On Fri, Apr 02, 2010 at 03:29:32AM +0200, Wolfram Sang wrote:
> On Thu, Apr 01, 2010 at 03:22:35PM +0200, Hans J. Koch wrote:
> > On Thu, Apr 01, 2010 at 03:20:17PM +0200, Daniel Mack wrote:
> > > On Thu, Apr 01, 2010 at 02:57:40PM +0200, Hans J. Koch wrote:
> > > > I need to get the MMC interface of an i.MX35 to work in the near future.
> > > > To avoid duplicate work, I'd like to know if anybody already started
> > > > work on this.
> > > 
> > > Is the controller very different from the one which is already supported
> > > for MX31?
> > 
> > Yep. Completely different beast. Unfortunately.
> 
> (CCing linux-mmc)
> 
> And it is a mess, really :(
> 
> The kernel already has an esdhc-driver (and Anton already worked around a
> number of hardware-bugs), but is tied into an of-driver because the core was
> also used on PowerPC. There, it utilizes a 32-bit-byte-swaper which is not
> needed on ARM. So, one has to rip all that out, generalize the sdhc-platform
> support (possibly also abstract the quirk support) and make sure nothing
> breaks.

FYI, there is sdhci-pltfm driver, + some patches to add
quirks support:

http://lkml.org/lkml/2010/3/16/337

These patches are already in the -mm tree.

Thanks,

-- 
Anton Vorontsov
email: cbouatmailru@gmail.com
irc://irc.freenode.net/bd2