From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: Re: [PATCH] psmouse: disable the synaptics extension on OLPC machines. Date: Sun, 19 Dec 2010 00:37:09 -0800 Message-ID: <20101219083709.GE10074@core.coreip.homeip.net> References: <20101217210939.19b6111a@queued.net> <20101218054927.GA14718@core.coreip.homeip.net> <20101217221447.375b9977@queued.net> <20101218070205.GA15847@core.coreip.homeip.net> <20101219082026.GD10074@core.coreip.homeip.net> <20101219003214.26f1a6b1@queued.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-pv0-f174.google.com ([74.125.83.174]:64408 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751765Ab0LSIhP (ORCPT ); Sun, 19 Dec 2010 03:37:15 -0500 Content-Disposition: inline In-Reply-To: <20101219003214.26f1a6b1@queued.net> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Andres Salomon Cc: Daniel Drake , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, pgf@laptop.org, James Cameron On Sun, Dec 19, 2010 at 12:32:14AM -0800, Andres Salomon wrote: > On Sun, 19 Dec 2010 00:20:27 -0800 > Dmitry Torokhov wrote: > > > On Sat, Dec 18, 2010 at 10:00:51AM +0000, Daniel Drake wrote: > > > On 18 December 2010 07:02, Dmitry Torokhov > > > wrote: > > > > What about just adding psmouse.proto=exps then? > > > > > > It's not quite that simple either, because we want the same distro > > > image to work on all versions of XO. XO's can come with either hgpk, > > > synaptics, or sentelic touchpads. In the sentelic and hgpk cases, > > > we'd want the "real" drivers to kick in. > > > > > > > Hmm, I am confused. HGPK depends on OLPC so your distribution must > > have it defined. Are there general purpose distributions that enable > > OLPC? > > > Yes, Debian enables CONFIG_OLPC in its 486 kernel (and one of these > days, I'll open up a bug for them to enable it in their 686 kernel). > > There are 3 types of touchpads in OLPC XO machines (hgpk, synaptics, > and sentelics). If the hardware is either hgpk or sentelics, we want > those extensions to load. If the hardware is synaptics, we want the > extension not to load. Doing this via kernel > arg doesn't work, as a generic distributions (and even those built > specifically for OLPC XOs) will not know which touchpad hardware will > be in use. > It still should be theoretically possible to do it in userspace (playing with protocol settings via sysfs) but I think in kernel is less painful. I'll apply the patch. Thanks for the explanations. -- Dmitry