From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Tissoires Subject: Re: [PATCH v2 1/2] Input: synaptics-rmi4 - RMI4 can also use SMBUS version 3 Date: Wed, 25 Oct 2017 09:31:55 +0200 Message-ID: <20171025073155.GE13605@mail.corp.redhat.com> References: <20171006140630.6398-1-yiannis.marangos@gmail.com> <20171006140630.6398-2-yiannis.marangos@gmail.com> <20171010175707.xtdgimmnju7cjlom@dystopia.localdomain> <20171024181924.ib3oybrxdq42h5f3@dtor-ws> <4b3f9306-785d-155d-f23f-54acf7852da5@synaptics.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Received: from mx1.redhat.com ([209.132.183.28]:60470 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751782AbdJYHcB (ORCPT ); Wed, 25 Oct 2017 03:32:01 -0400 Content-Disposition: inline In-Reply-To: <4b3f9306-785d-155d-f23f-54acf7852da5@synaptics.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Andrew Duggan Cc: Dmitry Torokhov , Yiannis Marangos , linux-input@vger.kernel.org On Oct 24 2017 or thereabouts, Andrew Duggan wrote: > Hi Dmitry, > > On 10/24/2017 11:19 AM, Dmitry Torokhov wrote: > > On Tue, Oct 10, 2017 at 09:04:20PM +0300, Yiannis Marangos wrote: > > > Hi guys, > > > > > > As I understand the second part of the patchset will take a while until it get > > > merged. Is it possible to merge the first part only? Without this, LEN0073 users > > > can not use psmouse.synaptics_intertouch=1 as a workaround. LEN0073 is not > > > usable at all unless users patch the kernel manually. > > Benjamin, Andrew, any comments/objections on expanding the acceptable > > version range? > > I didn't comment earlier since I didn't have any specific info about SMBus > v3. But, looking at the spec for v3 it sounds like our v2 touchpads should > be compatible with a v3 bus. > > "This version of the specification is a superset of previous versions, 1.0, > 1.1, and 2.0. The intent is that all devices compliant with these previous > versions are compliant with this version." > > From http://smbus.org/specs/SMBus_3_0_20141220.pdf pg 8 section 1.3. > > Based on that quote and the fact that it seems to work for Yiannis makes me > think that this change is probably ok. > I concur. I thought the version was Synaptics' one, but if it is the SMBus protocol they are following, allowing v3 is OK. Aceked-By: Benjamin Tissoires Cheers, Benjamin > Andrew > > > Thanks. > > >