Is anyone working on SD/MMC driver for i.MX35 ?
Hans J. Koch
hjk at linutronix.de
Tue Apr 6 05:12:21 EDT 2010
On Mon, Apr 05, 2010 at 10:21:03PM +0400, Anton Vorontsov wrote:
> 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 a lot for all your hints! Will have a deeper look at that.
Thanks,
Hans
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