From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikolai Kondrashov Subject: Re: [PATCH v2] Documentation: Add evdev type and code definitions Date: Sat, 08 Jan 2011 01:06:35 +0300 Message-ID: <4D278E6B.7020002@gmail.com> References: <1294435695-16750-1-git-send-email-chase.douglas@canonical.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ey0-f174.google.com ([209.85.215.174]:33418 "EHLO mail-ey0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753636Ab1AGWGk (ORCPT ); Fri, 7 Jan 2011 17:06:40 -0500 In-Reply-To: <1294435695-16750-1-git-send-email-chase.douglas@canonical.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Chase Douglas Cc: Dmitry Torokhov , Henrik Rydberg , Chris Bagwell , Peter Hutterer , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org On 01/08/2011 12:28 AM, Chase Douglas wrote: > +* BTN_TOOL_: > + - These codes are used in conjunction with input trackpads, tablets, and > + touchscreens. These devices may be used with fingers, pens, or other tools. > + When an event occurs and a tool is used, the corresponding BTN_TOOL_ > + code should be set to a value of 1. When the tool is no longer interacting > + with the input device, the BTN_TOOL_ code should be reset to 0. All > + trackpads, tablets, and touchscreens should use at least one BTN_TOOL_ > + code when events are generated. There are some tablets (namely UC-Logic ones), which do not indicate tool proximity. Yet they may have both a pen and a mouse. They just send reports with separate report IDs. Currently it is solved by using HID_QUIRK_MULTI_INPUT and not sending any BTN_TOOL_* events. Should the documentation reflect the fact that some tablets do not send any BTN_TOOL_* events, or should the drivers be updated to synthesise them? Note that in the latter case there will never be a BTN_TOOL_* with zero value when the tool leaves the digitizing area, but only when the tools are switched (if ever). Sincerely, Nick