linux-kernel - Re: [PATCH] pwm-backlight: add regulator and GPIO support

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Message-ID: <20120704152451.GA7333@sirena.org.uk>
Date:	Wed, 4 Jul 2012 16:24:51 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Alex Courbot <acourbot@...dia.com>
Cc:	Sascha Hauer <s.hauer@...gutronix.de>,
	Thierry Reding <thierry.reding@...onic-design.de>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>
Subject: Re: [PATCH] pwm-backlight: add regulator and GPIO support

On Thu, Jul 05, 2012 at 12:14:39AM +0900, Alex Courbot wrote:
> On Wed 04 Jul 2012 10:00:56 PM JST, Sascha Hauer wrote:

> >Also please be aware that using a regulator in the pwm backlight will
> >instantly break all existing users. That's hardly your fault though.

> Sorry, I don't see why. Could you elaborate on this?

All existing machines will start failing during probe as they won't be
able to find the regulator - you should ideally make sure everyone in
mainline gets an appropriate regulator set up.
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