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From: Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH] gpio: Add device driver for GRGPIO cores
To: Andreas Larsson <andreas@gaisler.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
        Rob Herring <rob.herring@calxeda.com>, linux-kernel@vger.kernel.org,
        devicetree-discuss@lists.ozlabs.org, software@gaisler.com
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Date: Sat, 09 Feb 2013 14:52:01 +0000
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On Wed, 30 Jan 2013 13:28:41 +0100, Andreas Larsson <andreas@gaisler.com> wrote:
> This driver supports GRGPIO gpio cores available in the GRLIB VHDL IP core
> library.
> 
> Signed-off-by: Andreas Larsson <andreas@gaisler.com>

Have you looked at drivers/gpio/gpio-generic.c? This looks to me like
yet another memory mapped gpio controller than could be handled with the
generic driver.

g.