linux-kernel - Re: [PATCH v4 2/4] mfd: lubbock

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Message-ID: <20150325140725.GA11499@kroah.com>
Date:	Wed, 25 Mar 2015 15:07:25 +0100
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>
Cc:	Lee Jones <lee.jones@...aro.org>, Arnd Bergmann <arnd@...db.de>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Grant Likely <grant.likely@...aro.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>
Subject: Re: [PATCH v4 2/4] mfd: lubbock_cplds: add lubbock IO board

On Fri, Feb 20, 2015 at 05:02:57PM +0100, Robert Jarzmik wrote:
> Lee Jones <lee.jones@...aro.org> writes:
> >> > Arnd, Greg,
> >> > 
> >> >   Perhaps you have some ideas WRT programmables (PLDs/CPLDs/FPGAs)?
> 
> Hi Arnd and Greg,
> 
> I have this driver I'm upstreaming, which comes out of
> arch/arm/mach-pxa/lubbock.c. As for the reason it is extracted, see submitted
> commit [1] for reference.
> 
> The main question is : where does it belong in the kernel ?
> 
> The driver is :
>  - for the CPLDs on the Lubbock development platform, which is more or less an
>    old motherboard for Intel Xscale pxa255 SoC (see [2] for more details)
>  - these CPLDs control :
>    - interrupt muxing towards the SoC
>    - several leds
>    - switches read back
>    For the whole patch, see [4]
> 
> Lee's position is that it doesn't belong to drivers/mfd, see [3].
> 
> So where should I submit it ? And more generally, where should CPLDs drivers be
> pushed in the kernel tree ?
> 
> If there is no solution, I'll fallback through arch/arm/plat-pxa, not very nice,
> but it has to land somewhere, I don't want lubbock to remain broken.

drivers/platform/arm ?

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