From cc300d9ead66235e23c674babb8a4ae4ad4c9db8 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Erik=20Bot=C3=B6?= <erik.boto@pelagicore.com>
Date: Fri, 20 May 2011 00:40:18 -0600
Subject: [PATCH] gpio/pca953x: Use handle_simple_irq instead of
 handle_edge_irq
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Make pca953x driver use the simple irq handler since no hardware control
is necessary and the driver lacks an irq_ack function. handle_edge_irq()
calls chip->irq_ack() which crashes since this function does not exist.

Signed-off-by: Erik Botö <erik.boto@pelagicore.com>
Signed-off-by: Richard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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