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From: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
To: Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Daniel Lezcano
	<daniel.lezcano-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
	"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 1/2] clocksource: sunxi: Add new compatibles
Date: Tue, 4 Feb 2014 09:41:17 +0100	[thread overview]
Message-ID: <20140204084117.GG25625@lukather> (raw)
In-Reply-To: <CAL_JsqJuSS1Hh8Fb26PMKBB_uKmLuiqnZJjz0zvt1Ux7P8cCzw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

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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
> <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> 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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  parent reply	other threads:[~2014-02-04  8:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1391348280-9484-1-git-send-email-maxime.ripard@free-electrons.com>
     [not found] ` <52EFC573.2050302@linaro.org>
     [not found]   ` <52EFC573.2050302-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-02-03 19:45     ` [PATCH 1/2] clocksource: sunxi: Add new compatibles Maxime Ripard
2014-02-03 20:11       ` Rob Herring
     [not found]         ` <CAL_JsqJuSS1Hh8Fb26PMKBB_uKmLuiqnZJjz0zvt1Ux7P8cCzw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-02-04  8:41           ` Maxime Ripard [this message]
2014-02-03 20:17       ` Daniel Lezcano
     [not found]         ` <52EFF96A.1020302-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-02-04  8:13           ` Gregory CLEMENT
2014-02-04  8:45           ` Maxime Ripard

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