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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Pi-Cheng Chen <pi-cheng.chen@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Mike Turquette <mturquette@linaro.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	"Joe.C" <yingjoe.chen@mediatek.com>,
	Eddie Huang <eddie.huang@mediatek.com>,
	Howard Chen <ibanezchen@gmail.com>,
	"fan.chen@mediatek.com" <fan.chen@mediatek.com>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
	"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
	"linux-mediatek@lists.infradead.org" 
	<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH 1/2] cpufreq: mediatek: Add MT8173 cpufreq driver
Date: Wed, 29 Apr 2015 11:36:46 +0530	[thread overview]
Message-ID: <CAKohpokhbh3QoDsG=2q3YGLnhhoumOkipj_zdd-JPfVSA0X5cQ@mail.gmail.com> (raw)
In-Reply-To: <CALx668W_rj8_UBory5fVa4_i3vLCjgApYCwHoSthXNmx79yH1g@mail.gmail.com>

On 24 April 2015 at 12:20, Pi-Cheng Chen <pi-cheng.chen@linaro.org> wrote:
> So even we have a new OPP binding to describe the OPP, we have to
> leave these table as they are for backward compatibility?

Yes.

I could find the below excerpts from [1]:

"The compatibility rules say that new kernels must work with older
device trees. If changes are required, they should be put into new
properties; the old ones can then be deprecated but not removed. New
properties should be optional, so that device trees lacking those
properties continue to work. The device tree developers will provide a
set of guidelines for the creation of future-proof bindings."

--
viresh

[1] http://lwn.net/Articles/572114/

  reply	other threads:[~2015-04-29  6:06 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-20  9:27 [PATCH v3 0/2] cpufreq: add cpufreq driver for Mediatek MT8173 SoC pi-cheng.chen
2015-04-20  9:27 ` [PATCH 1/2] cpufreq: mediatek: Add MT8173 cpufreq driver pi-cheng.chen
2015-04-20 14:17   ` Josh Cartwright
2015-04-20 18:31     ` Paul Bolle
2015-04-22  3:11     ` Pi-Cheng Chen
2015-04-22 14:33       ` Josh Cartwright
2015-04-20 18:28   ` Paul Bolle
2015-04-22  3:14     ` Pi-Cheng Chen
2015-04-23 12:01   ` Sascha Hauer
2015-04-24  6:46     ` Pi-Cheng Chen
2015-04-24 12:55       ` Sascha Hauer
2015-05-07  9:42         ` Pi-Cheng Chen
2015-04-23 12:56   ` Mark Rutland
2015-04-24  6:50     ` Pi-Cheng Chen
2015-04-29  6:06       ` Viresh Kumar [this message]
2015-04-30  7:42   ` Sascha Hauer
2015-05-07  9:40     ` Pi-Cheng Chen
2015-04-20  9:27 ` [PATCH 2/2] ARM64: mt8173: dts Add MT8173 cpufreq driver support pi-cheng.chen
2015-04-23 12:53   ` Mark Rutland
2015-04-24  7:09     ` Pi-Cheng Chen
2015-05-18 13:29       ` Pi-Cheng Chen

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