linux-kernel - Re: [PATCH] forced recalibration for the OLPC hgpk touchpad

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Date:	Wed, 3 Jun 2009 08:04:57 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	pgf@...top.org
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] forced recalibration for the OLPC hgpk touchpad

Hi Paul,

On Tuesday 02 June 2009 12:47:59 pgf@...top.org wrote:
> The OLPC XO laptop incorporates a combination touchpad/tablet
> device which unfortunately requires frequent recalibration.  The
> driver will force this automatically when various suspicious
> behaviors are observed, and the user can recalibrate manually
> (with a special keyboard sequence).  There's currently no way,
> however, for an external program to cause recalibration.
>
> This patch creates a new node in /sys which, when written with '1',
> will force a touchpad recalibration.  No other writes (or reads)
> of this node are supported.
>


Instead of creating a new sysfs attribute maybe we should make
the touchpad recalibrate upon resume (reconnect)? Userspace can
already request reconnect via sysfs.
 
-- 
Dmitry

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