From: Luis Alves <ljalvs@gmail.com>
Date: Wed, 24 Jul 2013 12:06:01 +0000 (-0300)
Subject: [media] cx23885[v4]: Fix interrupt storm when enabling IR receiver
X-Git-Tag: v3.12-rc1~135^2~179
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5bc08e1921e46101457d3be09835697490177fdd;p=pandora-kernel.git

[media] cx23885[v4]: Fix interrupt storm when enabling IR receiver

Apparently the Flatiron genereates an interrupt after the built-in self
test for each of its left and right channels has completed.

Apparently Conexant wire-OR'ed the Flatiron's interrupt output with the
interrupt output of the CX23885 A/V core.

Those interrupts need to be handled, otherwise, they generate an
interrrupt request storm.

So:

- Add flatiron readreg and writereg functions prototypes
  on a new header file;
- Modify the av interrupt handler to cleanup flatiron IRQs if no other
  interrupt handling happens.

Signed-off-by: Luis Alves <ljalvs@gmail.com>
Acked-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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