Re: Devicetree Maintenance in barebox

From: Ian Campbell <ijc@hellion.org.uk>
To: Jon Loeliger <jdl@jdl.com>
Cc: Grant Likely <grant.likely@secretlab.ca>,
	barebox@lists.infradead.org, Jason Cooper <jason@lakedaemon.net>,
	devicetree@vger.kernel.org
Subject: Re: Devicetree Maintenance in barebox
Date: Mon, 10 Feb 2014 11:35:17 +0000	[thread overview]
Message-ID: <1392032117.5117.46.camel@kazak.uk.xensource.com> (raw)
In-Reply-To: <E1WCYdq-0004eu-Gr@jdl.com>

On Sun, 2014-02-09 at 11:58 -0600, Jon Loeliger wrote:
> > Hi Sascha,
> > 
> > + Grant Likely, Ian Campbell, devicetree ML
> > 
> > Also, In the DT meeting earlier this week, Grant Likely said he has the
> > request in to create a separate mailinglist for collaboration between
> > the different devicetree users (BSD, Linux, etc).
> 
> ...
> 
> > I think the proper solution will percolate out of the first
> > cross-project discussions on the new ML.
> 
> ...
> 
> > Definitely fodder for the new ML.
> > 
> > Grant, can you please add Sascha to the list of folks to notify when
> > the new ML is ready?
> 
> I don't think there needs to be a different mailing list
> in order to combine or discuss other OS's use of the device
> tree compiler.  The  DTC is OS and Use-agnostic.  Discussions
> of DTC needs for FreeBSD can happen right here as the orginal
> purpose of this list was DTC discussion.
> 
> Are you, and Grant(?), suggesting that a separate list
> should be created for FreeBSD use of DTS-file contents?
> Or that DTS-file-content related discussions should be
> separated from DTC discussions?

The latter. See http://www.spinics.net/lists/devicetree/msg19209.html .
The issue is the enormous volume of Linux specific stuff which is too
much of a firehose to sensibly suggest non-Linux people to subscribe
too.

> 
> > imho, the goal is to not have any project tied to a specific version
> > of the devicetree.
> >
> > iow, we don't break backwards compatibility in the
> > devicetrees, and projects should revert to default behavior if new dt
> > parameters are missing.  This means Linux and BSD shouldn't need to keep
> > a current copy of the devicetree in their trees.  However, building the
> > bootloader is a different animal.  It needs to provide the dt blob...
> 
> The devicetree source file format hasn't changed in years.
> Yes, it is enhanced, but compatibly.  Or do you mean the
> contents of the DTB for some specific platform?
> 
> Thanks,
> jdl
> 

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