From: Hartley Sweeten <hartleys@visionengravers.com>
Date: Tue, 28 Oct 2008 16:55:30 +0000 (+0100)
Subject: [ARM] 5324/2: ep93xx: support gpio interrupt debounce
X-Git-Tag: v2.6.29-rc1~559^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=799a0600ac49b03c1a6244847c2725c0082ba775;p=pandora-kernel.git

[ARM] 5324/2: ep93xx: support gpio interrupt debounce

Add debounce support for ep93xx gpio interrupts.

On the EP93xx, GPIO ports A, B, and F can be used to generate
interrupts. For each port, if interrupts are enabled, it is
possible to debouce the input signal. Debouncing is implemented
by passing the input signal through a 2-bit shift register clocked
by a 128Hz clock.

This patch adds a platform specific way to enable the debouce
feature for these input ports.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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