Subject: [PATCH 1/2] clocksource: sunxi: Add new compatibles

From: [email-masked] (Maxime Ripard)
Date: Tue, 4 Feb 2014 09:41:17 +0100

Hi Rob,

On Mon, Feb 03, 2014 at 02:11:28PM -0600, Rob Herring wrote:
> On Mon, Feb 3, 2014 at 1:45 PM, Maxime Ripard
> <[email-masked]> wrote:
> > Hi Daniel,
> >
> > (Adding DT mailing-list in CC)
> >
> > On Mon, Feb 03, 2014 at 05:36:03PM +0100, Daniel Lezcano wrote:
> >> On 02/02/2014 02:37 PM, Maxime Ripard wrote:
> >> >The Allwinner A10 compatibles were following a slightly different compatible
> >> >patterns than the rest of the SoCs for historical reasons. Add compatibles
> >> >matching the other pattern to the timer driver for consistency, and keep the
> >> >older one for backward compatibility.
> >>
> >> Hi Maxime,
> >>
> >> is it really needed to keep the old pattern ?
> >
> > We agreed during the ARM Kernel Summit to consider the DT as a stable
> > ABI.
> >
> > While I'd be ok with removing the older ones, that also means that we
> > would break the boot of newer kernels with older DT, so yes, we
> > actually need to keep the old compatibles.
> 
> It all depends if that would really cause problems for a given
> platform. So if Allwinner DT support is a moving target, then changing
> is probably okay. For example, if anyone using the platform is going
> to need to update their DTB to add more nodes to get various features
> anyway, then breaking it is not all that important.

We keep adding new stuff to the DT, yes, so I guess we can be
considered a moving target. Thanks for your input!

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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