From: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Date: Fri, 5 Sep 2008 09:24:46 +0000 (+0530)
Subject: rtc-twl4030: Fix periodic interrupt
X-Git-Tag: v2.6.27-omap1~236
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=589ccfa4dea1ce19f7ca96472fa32d4f3f1d39eb;p=pandora-kernel.git

rtc-twl4030: Fix periodic interrupt

RTC generates an extra spurious interrupt for every actual periodic
interrupt. This is due to a problem with the RTC_IT bit of
REG_PWR_ISR1. It requires two writes or two reads (when COR is
enabled) to clear it. Since COR is enabled and one read of the same
register is done already (inside twl4030-pwrirq.c do_twl4030_pwrirq()
function), we can do away with a need to add one more write into the
same register inside the interrupt handler, by replacing the write
currently present with just one extra read.

Signed-off-by: Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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