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Date: Wed, 25 Mar 2015 15:07:25 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Lee Jones <lee.jones@linaro.org>, Arnd Bergmann <arnd@arndb.de>,
        Nicolas Pitre <nicolas.pitre@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>, Daniel Mack <daniel@zonque.org>,
        Haojian Zhuang <haojian.zhuang@gmail.com>,
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        Grant Likely <grant.likely@linaro.org>, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
        Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Subject: Re: [PATCH v4 2/4] mfd: lubbock_cplds: add lubbock IO board
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On Fri, Feb 20, 2015 at 05:02:57PM +0100, Robert Jarzmik wrote:
> Lee Jones <lee.jones@linaro.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 ?