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Date: Tue, 3 Sep 2013 14:35:39 +0200
Message-ID: <CACRpkdYeMGkju345g9d_ifZEOiVXftzSqU=1CfGO=qnt6Vj-Bg@mail.gmail.com>
Subject: Re: [PATCH v3] gpio: interrupt consistency check for OF GPIO IRQs
From: Linus Walleij <linus.walleij@linaro.org>
To: Stephen Warren <swarren@wwwdotorg.org>
Cc: Lars Poeschel <larsi@wh2.tu-dresden.de>,
        Lars Poeschel <poeschel@lemonage.de>,
        Grant Likely <grant.likely@linaro.org>,
        "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ian.campbell@citrix.com>,
        Kumar Gala <galak@codeaurora.org>, Pawel Moll <pawel.moll@arm.com>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Javier Martinez Canillas <javier.martinez@collabora.co.uk>,
        Enric Balletbo i Serra <eballetbo@gmail.com>,
        Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>,
        Santosh Shilimkar <santosh.shilimkar@ti.com>,
        Kevin Hilman <khilman@linaro.org>, Balaji T K <balajitk@ti.com>,
        Tony Lindgren <tony@atomide.com>, Jon Hunter <jgchunter@gmail.com>
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On Fri, Aug 30, 2013 at 9:53 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:

> I still haven't seen an answer to why we really care about this; how
> many times has code actually allocated the same GPIO/IRQ when it
> shouldn't, in a way that it wasn't detectable by some other mechanism,
> i.e. the feature just not working? Why are we even trying to solve this
> issue? I'm not totally convinced it even makes sense to try and solve it.

We care about this because a number of OMAP boards are not
working properly when booted from device tree, and they have a hard
time figuring out a solution to the problem. Last try exploded. Now
they are looking to create a patch that will fix the actual problem.

Yours,
Linus Walleij
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