On Tuesday 03 November 2015 10:33:01 Patrick Boettcher wrote:
> Hi all,
> 
> Sorry for posting out-of-thread, but I don't have the original mail and
> thus cannot reply.
> 
> If refer to this thread:
> 
> https://lkml.org/lkml/2014/7/15/975
> 
> where you guys started to review and prepare things for
> upstream-inclusion of the csdio-module. 
> 
> Strangely enough the last mail on lkml.org isn't showing - I had to
> use another lkml-archive: 
> http://lkml.iu.edu/hypermail/linux/kernel/1407.2/01971.html
> 
> In it, greg is saying, that this thing is "_way_ down" on his list. 
> 
> Has, by magic, anything evolved regarding the remarks made by Arnd and
> I'm just too blind to find it? (nothing in recent kernel sources)
> 
> We are having the exact same need (a basic sdio-device-driver
> accessing things from user-space) and are ready to invest some time in
> it (if nothing comes in between) - but of course would like to start
> from something sane.

I have never heard from it again. Looking at the Android sources, I find that
the driver has been removed between Android 6.0-r0.5:
https://android.googlesource.com/kernel/msm/+/f06163e6d0b0c001ed79275cbe522d0b62ace3ed

The basic concept of the driver looks sane, so I think it makes sense to
start out with the code from Android 6.0-r0.4 and adapt it to your needs.
An alternative would be to build on the support we have in the MMC block
driver that allows sending commands to a card, but that is currently
limited to the block device interface.

        Arnd
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