From: Herbert Valerio Riedel <hvr@gnu.org>
Date: Mon, 26 Nov 2007 17:49:08 +0000 (+0100)
Subject: [ARM] 4670/1: ep93xx: implement IRQT_BOTHEDGE gpio irq sense type
X-Git-Tag: v2.6.25-rc1~1175^2~2^3~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3c9a071d77e007464952a2d41b6686d98eb3f0b8;p=pandora-kernel.git

[ARM] 4670/1: ep93xx: implement IRQT_BOTHEDGE gpio irq sense type

Having a both-edge sensitive irq trigger type is required for the
generic gpio-keys input driver; alas the ep93xx does not support
both-edge gpio triggers in hardware, so this patch implements them by
switching edge polarity on each triggered interrupt.  This is the same
approach as taken by the Orion SoC both-edge gpio irq support
implementation.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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