linux-kernel - Re: [PATCH v4 2/8] Documentation: arm: define DT cpu capacity bindings

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Message-ID: <20160321121210.GQ2566@sirena.org.uk>
Date:	Mon, 21 Mar 2016 12:12:10 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Juri Lelli <juri.lelli@....com>
Cc:	Vincent Guittot <vincent.guittot@...aro.org>,
	Sai Gurrappadi <sgurrappadi@...dia.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	LAK <linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Sudeep Holla <sudeep.holla@....com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Olof Johansson <olof@...om.net>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Paul Walmsley <paul@...an.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	pboonstoppel@...dia.com
Subject: Re: [PATCH v4 2/8] Documentation: arm: define DT cpu capacity
 bindings

On Mon, Mar 21, 2016 at 11:49:56AM +0000, Juri Lelli wrote:

> But we'll still need to normalize this w.r.t the highest score we get on
> a specific platform, right? And while we are at normalizing it, it is
> probably simpler if we keep the frequency component as part of the
> number, IMHO. But, maybe keeping the frequency component separate is
> more acceptable from a DT binding perspective?

One possible issue with that: if we keep the frequency number as part of
the core number then that might cause issues for devices with variants
or system deployment decisions that remove some OPPs from a table.  If
the top OPP gets removed that would throw off the numbers.

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