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

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Date:	Thu, 5 Jul 2012 11:41:21 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	Alex Courbot <acourbot@...dia.com>,
	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 10:02:34AM +0200, Sascha Hauer wrote:

> So here the regulator core knows that there is no regulator and never
> will be. All that needs to be done is to make _regulator_get look at
> that value.

> There may be some side effects if we just return ERR_PTR(-ENODEV) when
> regulator_dev_lookup returns -ENODEV. Maybe Mark has some comments to
> this.

I'm concerned about how this is going to interact with all the plans
people have for dynamically loading device tree fragments during
enumeration.

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