From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265522AbTFMUZG (ORCPT ); Fri, 13 Jun 2003 16:25:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265525AbTFMUZF (ORCPT ); Fri, 13 Jun 2003 16:25:05 -0400 Received: from twilight.ucw.cz ([81.30.235.3]:9635 "EHLO twilight.ucw.cz") by vger.kernel.org with ESMTP id S265522AbTFMUZC (ORCPT ); Fri, 13 Jun 2003 16:25:02 -0400 Date: Fri, 13 Jun 2003 22:38:46 +0200 From: Vojtech Pavlik To: James Simmons Cc: Peter Berg Larsen , linux-kernel@vger.kernel.org Subject: Re: [PATCH] Synaptics TouchPad driver for 2.5.70 Message-ID: <20030613223846.A9080@ucw.cz> References: <20030613094435.B29859@ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from jsimmons@infradead.org on Fri, Jun 13, 2003 at 09:25:09PM +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 13, 2003 at 09:25:09PM +0100, James Simmons wrote: > Just as a idea for API. How about ABS_AREA or REL_AREA instead of > ABS_MISC. The idea is the pressure value returned should be about > the same if one presses hard with one finger or softly with a whole > hand. Huh? Force = Pressure x Area ... I think you're mixing up force and pressure here. > So to tell the difference between the two we can report the > pressure and the area over which it acted. Say in virtual reality > environment simulation poking a object hard with your finger would > have a very different effect than placing your hand lightly on the > object even tho they might register about the same pressure. -- Vojtech Pavlik SuSE Labs, SuSE CR