linux-kernel - Re: [PATCH v3 2/5] extcon: max14577: Add extcon-max14577 driver to support MUIC device

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Message-ID: <20131122103533.GI14725@sirena.org.uk>
Date:	Fri, 22 Nov 2013 10:35:33 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Anton Vorontsov <anton@...msg.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	Pawel Moll <pawel.moll@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Landley <rob@...dley.net>, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH v3 2/5] extcon: max14577: Add extcon-max14577 driver to
 support MUIC device

On Fri, Nov 22, 2013 at 09:46:09AM +0100, Krzysztof Kozlowski wrote:

> +#define	DELAY_MS_DEFAULT		17000		/* unit: millisecond */

This delay is sufficiently large that the delayed work using it probably
ought to use the power efficient workqueues instead of just a regular
schedule_delayed_work().  This will mean that instead of being scheduled
on the core which scheduled it the work can run on any CPU, avoiding the
need to power up a currently idle CPU just to run the work.

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