From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755636Ab0JEQSe (ORCPT ); Tue, 5 Oct 2010 12:18:34 -0400 Received: from mail-iw0-f174.google.com ([209.85.214.174]:59117 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752274Ab0JEQSd (ORCPT ); Tue, 5 Oct 2010 12:18:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=w1lRscKv/fLEY2CYv2wecsDlHwrzJBDKiEvtMU0ypOgdDPxToBxuRDbR72iDEEUigV UJHlIdUExRSR5Y8rvMpBaRkPetXGIRXbHoNesK7GiTSlaRB1pnhXDyIOWl3ANzzp7pWC patkitTVOsHWmfrppkGClrR6RZXthb79gndWE= Date: Tue, 5 Oct 2010 09:18:26 -0700 From: Dmitry Torokhov To: Oliver Neukum Cc: Bastien Nocera , linux-input , Jiri Kosina , linux-kernel Subject: Re: [RESEND] [PATCH] Input: add appleir USB driver Message-ID: <20101005161826.GE19730@core.coreip.homeip.net> References: <1285844276.26405.26.camel@cookie.hadess.net> <201010050818.35118.oliver@neukum.org> <20101005155552.GB19730@core.coreip.homeip.net> <201010051807.36551.oliver@neukum.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201010051807.36551.oliver@neukum.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 05, 2010 at 06:07:36PM +0200, Oliver Neukum wrote: > Am Dienstag, 5. Oktober 2010, 17:55:52 schrieb Dmitry Torokhov: > > > Yes, but based on sane timing. From the time stamps user space > > > would conclude that the key had been pressed at an unknown time > > > before open and released at the time the event indicates. Possibly > > > it would compute that the key had been held for at least hours. > > > > > > > I do not understand. If a client never seen the "press" event and only > > saw "release" event it can't make any assumptions about timing. Press > > could be a millisecond ago or an hour ago, it just does not know. And > > such scenario can easily happen if the client is second to open the > > device. > > As soon as you open a device you see key presses. If you see a release > without a press, the press must have happened before you opened. > So if you know when you opened and when a key is released, you'll > have a lower limit on how long the key must have been held down. > Yes. I still do not see the usefulness of this data. -- Dmitry