From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: =?iso-8859-1?q?J=FCrgen_Beisert?= To: Jonathan Cameron Subject: Re: [PATCH 6/9] Staging/iio/adc/touchscreen/MXS: add interrupt driven touch detection Date: Tue, 1 Oct 2013 11:28:38 +0200 Cc: linux-arm-kernel@lists.infradead.org, linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, marex@denx.de, fabio.estevam@freescale.com, Dmitry Torokhov , jic23@cam.ac.uk, linux-input@vger.kernel.org References: <1379946998-23041-1-git-send-email-jbe@pengutronix.de> <1379946998-23041-7-git-send-email-jbe@pengutronix.de> In-Reply-To: <1379946998-23041-7-git-send-email-jbe@pengutronix.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Message-Id: <201310011128.38928.jbe@pengutronix.de> List-ID: Hi Jonathan, On Tuesday 01 October 2013 11:25:46 Jonathan Cameron wrote: > a couple of the patch descriptions say that they are untested on i.MX28. On Monday 23 September 2013 16:36:35 Juergen Beisert wrote: > For battery driven systems it is a very bad idea to collect the touchscre= en > 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. > > Note: this is only tested on an i.MX23 SoC yet. This note is no longer true. Marek tested it on his M28EVK, Lothar on his T= X28=20 and myself also on an i.MX28EVK. =46or the IIO part of the driver I tested on my i.MX23 based ChumbyOne and = some=20 customer hardware and it seems still to work (I can only guess if the value= s I=20 read from the sysfs entries are correct, sorry). Regards, Juergen =2D-=20 Pengutronix e.K. =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 = =A0| Juergen Beisert =A0 =A0 =A0 =A0 =A0 =A0 | Linux Solutions for Science and Industry =A0 =A0 =A0| http://www.pengutroni= x.de/ |