linux-kernel - Re: DT bindings as ABI [was: Do we have people interested in device tree janitoring / cleanup?]

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Date:	Thu, 25 Jul 2013 15:31:35 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Rob Herring <robherring2@...il.com>
Cc:	Olof Johansson <olof@...om.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"ksummit-2013-discuss@...ts.linuxfoundation.org" 
	<ksummit-2013-discuss@...ts.linuxfoundation.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Domenico Andreoli <cavokz@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dave P Martin <Dave.Martin@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: DT bindings as ABI [was: Do we have people interested in
 device tree janitoring / cleanup?]

On Thu, Jul 25, 2013 at 02:11:31PM -0500, Rob Herring wrote:
> On Thu, Jul 25, 2013 at 11:09 AM, Olof Johansson <olof@...om.net> wrote:

> > One problem that needs to be solved is obviously how a binding
> > graduates from tentative to locked. This work isn't going to be very
> > interesting to most people, I suspect. Think standards committee type
> > work.
> 
> I think a time based stabilization period would be better than a
> separate directory to apply bindings too. Or time plus periodic review
> perhaps.

The only problem with a time-based versus separate directory is how do
users who've downloaded the tree determine which bindings are stable?
If they pull a tarball, or receive an SDK, there is most likely no git
history attached.

I think the idea of a 'tentative' directory (or 'locked') is churnish,
but necessary.  If I DL'd a tarball and had to type 'tentative' to get
to the binding doc I wanted, that would be a pretty clear clue to be
delicate about how I trust/use/plan with that binding.

thx,

Jason.
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