linux-kernel - Re: ads7846 touchscreen: fix pressure

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Message-ID: <20091008092433.GA26837@elf.ucw.cz>
Date:	Thu, 8 Oct 2009 11:24:33 +0200
From:	Pavel Machek <pavel@....cz>
To:	Trilok Soni <soni.trilok@...il.com>
Cc:	dtor@...l.ru, dmitry.torokhov@...il.com,
	linux-input@...r.kernel.org,
	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: ads7846 touchscreen: fix pressure

On Thu 2009-10-08 10:39:39, Trilok Soni wrote:
> Hi Pavel,
> 
> On Wed, Oct 7, 2009 at 1:24 AM, Pavel Machek <pavel@....cz> wrote:
> >
> > On Zaurus, pressure is reported inverted -- the lighter the pressure,
> > the bigger numerical value. This should fix it.
> >
> > Signed-off-by: Pavel Machek <pavel@....cz>
> >
> > --- linux-rc/drivers/input.ofic/touchscreen/ads7846.c   2009-10-06 13:49:56.000000000 +0200
> > +++ linux-rc/drivers/input/touchscreen/ads7846.c        2009-10-06 21:18:25.000000000 +0200
> > @@ -608,12 +609,12 @@
> >
> >                input_report_abs(input, ABS_X, x);
> >                input_report_abs(input, ABS_Y, y);
> > -               input_report_abs(input, ABS_PRESSURE, Rt);
> > +               input_report_abs(input, ABS_PRESSURE, ts->pressure_max-Rt);
> 
> but same behavior is seen by others using this chip on different
> boards? If not, this has to be done through platform data.

Well, I'd expect the chip to behave in similar way on all
platforms. Of course, it would be good if someone with different hw
tested it, but I do not have that hw...

So I guess the best way is to make it go in early and see how it does
in testing....
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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