Re: [PATCH] Synaptics TouchPad driver for 2.5.70

From: Peter Berg Larsen <pebl@math.ku.dk>
To: Vojtech Pavlik <vojtech@ucw.cz>
Cc: Peter Osterlund <petero2@telia.com>,
	Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Synaptics TouchPad driver for 2.5.70
Date: Sat, 14 Jun 2003 00:55:32 +0200 (CEST)	[thread overview]
Message-ID: <Pine.LNX.4.40.0306140028350.27605-100000@shannon.math.ku.dk> (raw)
In-Reply-To: <20030614000810.A10851@ucw.cz>

On Sat, 14 Jun 2003, Vojtech Pavlik wrote:

> > What do we call these things? ABS_FINGER_WIDTH and ABS_NR_FINGERS
> > maybe?

> Could work. Or as James Simmons suggested ABS_AREA.

ABS_NR_FINGERS and ABS_AREA ? I find ABS_FINGER_WIDTH to more telling.

The important part is that the driver must know when there is added or
removed a finger as touchpads sends the avarage positions of the fingers.
Adding or removing a finger moves the mouse if the driver does nothing.

There are other questions, if the API is to be used by a general user
touchpad driver. Is there a way to communicate the resolution of the x,y
and z coordinates to the user driver? (not only min/max). How do I tell
that the y coordinate is reversed (gliderpointer) ?

Peter