linux-kernel - Re: [PATCH v3 00/12] pwm: add support for atomic update

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Date:	Thu, 4 Feb 2016 11:02:03 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Doug Anderson <dianders@...gle.com>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>,
	Heiko Stübner <heiko@...ech.de>,
	linux-pwm <linux-pwm@...r.kernel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jingoo Han <jingoohan1@...il.com>,
	Lee Jones <lee.jones@...aro.org>, linux-fbdev@...r.kernel.org,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	linux-leds@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	linux-sunxi@...glegroups.com,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v3 00/12] pwm: add support for atomic update

On Wed, Feb 03, 2016 at 11:04:20AM -0800, Doug Anderson wrote:

> Sure.  ...but you agree that somehow you need a new API call for this,
> right?  Somehow the PWM regulator needs to be able to say that it
> wants the hardware state, not the initial state as specified in the
> device tree.

Wouldn't the most direct way to do that be to just not specify anything
in the DT?  If there *is* something in DT but we ignore it that's a bit
weird.

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