From: Juergen Beisert <jbe@pengutronix.de>
Date: Mon, 23 Sep 2013 14:36:00 +0000 (+0100)
Subject: Staging/iio/adc/touchscreen/MXS: add interrupt driven touch detection
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~62^2~453^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dee05308f6029caed91e1a015cafb1545958ba27;p=pandora-kernel.git

Staging/iio/adc/touchscreen/MXS: add interrupt driven touch detection

For battery driven systems it is a very bad idea to collect the touchscreen
data within a kernel busy loop.

This change uses the features of the hardware to delay and accumulate samples in
hardware to avoid a high interrupt and CPU load.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Tested-by: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

CC: linux-arm-kernel@lists.infradead.org
CC: linux-input@vger.kernel.org
CC: devel@driverdev.osuosl.org
CC: Marek Vasut <marex@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
CC: Dmitry Torokhov <dmitry.torokhov@gmail.com>
CC: linux-input@vger.kernel.org
---

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