Re: [PATCH 5/5] arm: boot: store ATAGs structure into DT "/chosen/linux,atags" entry

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* Arnd Bergmann <arnd@xxxxxxxx> [151125 11:50]:
> On Wednesday 25 November 2015 10:16:44 Tony Lindgren wrote:
> > * Pali Rohár <pali.rohar@xxxxxxxxx> [151123 06:46]:
> > > On Sunday 22 November 2015 07:51:46 Pavel Machek wrote:
> > > > On Wed 2015-11-11 17:10:46, Frank Rowand wrote:
> > > > > Adding devicetree list.
> > > > > 
> > > > > Thread starts at
> > > > > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/354459.html
> > > > > 
> > > > > On 11/5/2015 8:17 AM, Tony Lindgren wrote:
> > > > > > * Pali Rohár <pali.rohar@xxxxxxxxx> [151105 03:41]:
> > > > > >> On Tuesday 13 October 2015 16:37:46 Pali Rohár wrote:
> > > > > >>> On Monday 12 October 2015 13:45:09 Tony Lindgren wrote:
> > > > > >>>> * Pali Rohár <pali.rohar@xxxxxxxxx> [151012 13:29]:
> > > > > >>>>> On Monday 12 October 2015 22:16:40 Tony Lindgren wrote:
> > > > > >>>>>>
> > > > > >>>>>> Pali, any news on posting an updated series with the comments
> > > > > >>>>>> addressed in this thread? It seems that we all pretty much agree
> > > > > >>>>>> what needs to be done.
> > > > > 
> > > > > I'm not real happy with the concept of patches 4 and 5 in this series.
> > > > > My concern is that those two patches are using the FDT as a transport
> > > > > mechanism for a binary blob (the atags object).
> > > > 
> > > > Umm. Ok. Do you have alternative proposal that works for everyone?
> > > > 
> > > > I mean. This discussion was going for quite a long time, and it would
> > > > be nice to have some solution... patch proposal... something.
> > > >                                                                     Pavel
> > > 
> > > Yes, discussion is going for a long time! So should I spend time for
> > > adding documentation to my solution (this is last one thing which is
> > > missing)? Or my solution is wrong and somebody else will propose new?
> > > I do not want to spend time on something which will be rejected and
> > > discarded.
> > 
> > At least I don't have better solutions in mind.
> 
> I would be happier if we could restrict this as much as possible to the
> boards that need it, as an opt-in. That way it doesn't become an ABI
> for people that don't already rely in this information. How about
> adding a check the code adds the linux,atags property to do it
> only for a whitelist of board numbers?

Or populate /proc/atags only for the ones that need it from machine
specific init_early?

Regards,

Tony
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