linux-kernel - Re: [RFC PATCH v5 0/1] drivers: mfd: Versatile Express SPC support

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Message-ID: <1374070811.3146.124.camel@hornet>
Date:	Wed, 17 Jul 2013 15:20:11 +0100
From:	Pawel Moll <pawel.moll@....com>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>
Cc:	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Olof Johansson <olof@...om.net>,
	Amit Kucheria <amit.kucheria@...aro.org>,
	Jon Medhurst <tixy@...aro.org>,
	Achin Gupta <Achin.Gupta@....com>,
	Sudeep KarkadaNagesha <Sudeep.KarkadaNagesha@....com>
Subject: Re: [RFC PATCH v5 0/1] drivers: mfd: Versatile Express SPC support

On Wed, 2013-07-17 at 15:16 +0100, Nicolas Pitre wrote:
> On Wed, 17 Jul 2013, Pawel Moll wrote:
> 
> > On Wed, 2013-07-17 at 13:33 +0100, Nicolas Pitre wrote:
> > > If this is really miscelaneous code that really doesn't fit 
> > > anywhere else, it should rather go into drivers/misc/ as a last resort.
> > 
> > Interestingly enough drivers/misc was my first choice for all the
> > vexpress stuff, but it wasn't received well...
> > 
> > Anyway, the SPC driver as it is now seem to be a "power management
> > system driver". Maybe a relevant directory would be in place? Wouldn't
> > PSCI belong there as well? (there are two psci.c files in arch/arm and
> > arch/arm64, surprisingly similar ones ;-)
> > 
> > The bottom line is: today it is not an MFD driver.
> 
> But we know it will, right?  So better  save some churn by storing the 
> initial code where it would end up anyway once complete.

Not in that form, no. The code living in mfd will just register
mfd_cells while "functional" parts are going to live elsewhere. This is
how I understand what Samuel asked me to do and that's what is happening
to vexpress-sysreg now.

Paweł


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