linux-kernel - Re: [PATCH 10/21] regulator: core: Probe regulators on demand

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Message-ID: <20150526093601.GH21577@sirena.org.uk>
Date:	Tue, 26 May 2015 10:36:01 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Tomeu Vizoso <tomeu.vizoso@...labora.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Stéphane Marchesin 
	<stephane.marchesin@...il.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Alexander Holler <holler@...oftware.de>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Liam Girdwood <lgirdwood@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 10/21] regulator: core: Probe regulators on demand

On Tue, May 26, 2015 at 08:17:23AM +0200, Tomeu Vizoso wrote:
> On 25 May 2015 at 19:32, Mark Brown <broonie@...nel.org> wrote:

> > The obvious questions here based on the name are why we're doing
> > something specific to platform devices and why this isn't something
> > we're abstracting in the driver core (or at least generic firmware code)
> > - we're going to have the same thing with ACPI.

> I don't know how useful this is going to be in systems with ACPI. My
> experience is limited to 32bit ARM, where the kernel has to manage
> every regulator, clock, gpio, etc so the dependency tree is so big. Is
> deferred probing a problem with ACPI as well?

Yes, x86 based embedded systems use ACPI (and we really ought to be
trying to help systems using board files too for that matter).

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