Re: ION DTS changes for HiKey in -next

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On Fri, Jan 08, 2016 at 12:44:39PM +0000, Mark Brown wrote:
> On Thu, Jan 07, 2016 at 09:02:14PM -0800, Greg Kroah-Hartman wrote:
> > On Thu, Jan 07, 2016 at 05:37:44PM +0000, Mark Brown wrote:
> 
> > > I was just looking at DTs in -next and noticed that there is a patch
> > > 59dfafd03fc (arm64: dts: Add dts files to enable ION on Hi6220 SoC)
> > > which adds at DT doing something for ION.  Are we sure this should be
> > > going into the main production DT?  The bindings haven't been reviewed
> > > as far as I can tell, the matching driver is only in staging and hasn't
> > > been posted upstream.
> 
> > Isn't "staging" upstream enough for this?  :)
> 
> I wouldn't have thought so, DTs are supposed to be an ABI so we want
> proper review and having had a quick glance this doesn't look like it's
> a hardware description so it's not clear to me it should be in DT at all.

Indeed.

The driver and the binding before that don't really belong either,
I would have NAK'd those on devicetree@xxxxxxxxxxxxxxx, though it
appears I either missed them or they never made it to that list.

>From my PoV there should not be a platform-specific ION binding. If we
need one at all, people should work on the proposed generic binding [1]
or figure out how to do this with the existing reserved-memory bindings.

Thanks,
Mark.

[1] https://lkml.org/lkml/2015/10/6/854
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