Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp2683978imm; Fri, 20 Jul 2018 03:06:23 -0700 (PDT) X-Google-Smtp-Source: AAOMgpfcAV+sx5t/Ch7ZNyeqI9AqEUxTuNul259JTJiF3dAoAtg8iIvj6B8z5/jB/WUNagkAF7K+ X-Received: by 2002:a62:df82:: with SMTP id d2-v6mr1514007pfl.189.1532081183777; Fri, 20 Jul 2018 03:06:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1532081183; cv=none; d=google.com; s=arc-20160816; b=na3JWzZR+Iw5AOX2p243Sms8GLXOiGI/ZDMaQIalmeiqWdbcRv32OsBuOTyA6Qaz9/ TPZghR0gVgUJcrKD0yVE00cgHVrpGuJuea/BSCy/uEgxAPBqlkMYf+Wl2k9TgE1ujTG7 G4hx/Vm8UPTv85Be6RGZUpbkJjVJUyVV2TbUkONxp3DOZzDRHwls4wvC19ScvbNTxSOk 7ci9R1qY3451MXzzDhQLbULcSyc2MNd7+hH3tZzlAiPFc8a6m0E6hDayw2a+UvaXWkSI LiFm5naEhYlGpzdI88jZw0UF7eOxVWfnBk6zBqTnE67O7VJiYIfjKXPyfeqchtqE3HjW MPHw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date :arc-authentication-results; bh=7dOXyH5yhocdMRMwon/TNJ+S6QrZ3VSsJ56KuowIGRw=; b=MhlJwv3EJCr9FUwho/2nyoFxThoDhhUvFn93RnDZTHRYSQQs053L6ikitGlaJiSG8W JpDN21Q7k10xlxoqQ/jKaew040MISBDMYgIG5OPrhZKzPzFcuHITSIHioCOCcOeOh1NE jvlqpNEfPpFI7cw9tYus6TsYRzSz2me7sn92GxWTCYO/m5cVgxawEjXAIazwlAiQuIu4 1mzjW0LHLiRUmqL3/PGV9JMjsypa4xvmIkpT2eIKXxIwv4Vv05S8Ne9mD/IBfvSfq6h3 njZyl6x2pg7sqR3YkgrtBswHLqnCXHHfmjzZPrRnMI6PmYzIG788d6TnBCbeJyP77ycn sCFw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id p3-v6si1325393plr.131.2018.07.20.03.06.03; Fri, 20 Jul 2018 03:06:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730821AbeGTKwx (ORCPT + 99 others); Fri, 20 Jul 2018 06:52:53 -0400 Received: from mail.bootlin.com ([62.4.15.54]:41296 "EHLO mail.bootlin.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729816AbeGTKwx (ORCPT ); Fri, 20 Jul 2018 06:52:53 -0400 Received: by mail.bootlin.com (Postfix, from userid 110) id 7633220766; Fri, 20 Jul 2018 12:05:20 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.bootlin.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.0 Received: from bbrezillon (AAubervilliers-681-1-78-122.w90-88.abo.wanadoo.fr [90.88.20.122]) by mail.bootlin.com (Postfix) with ESMTPSA id CA09B203EC; Fri, 20 Jul 2018 12:05:19 +0200 (CEST) Date: Fri, 20 Jul 2018 12:05:18 +0200 From: Boris Brezillon To: Peter Rosin Cc: Arnd Bergmann , Wolfram Sang , linux-i2c@vger.kernel.org, Jonathan Corbet , "open list:DOCUMENTATION" , Greg Kroah-Hartman , Przemyslaw Sroka , Arkadiusz Golec , Alan Douglas , Bartosz Folta , Damian Kos , Alicja Jurasik-Urbaniak , Cyprian Wronka , Suresh Punnoose , Rafal Ciepiela , Thomas Petazzoni , Nishanth Menon , Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , DTML , Linux Kernel Mailing List , Vitor Soares , Geert Uytterhoeven , Linus Walleij , Xiang Lin , linux-gpio@vger.kernel.org, Sekhar Nori , Przemyslaw Gaj Subject: Re: [PATCH v6 00/10] Add the I3C subsystem Message-ID: <20180720120518.445b947b@bbrezillon> In-Reply-To: <2ab0ab75-2df0-2714-f007-c33b25481016@axentia.se> References: <20180719152930.3715-1-boris.brezillon@bootlin.com> <2ab0ab75-2df0-2714-f007-c33b25481016@axentia.se> X-Mailer: Claws Mail 3.15.0-dirty (GTK+ 2.24.31; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 20 Jul 2018 11:57:56 +0200 Peter Rosin wrote: > > Maybe a bit-bang I3C master isn't feasible for some fundamental > reason? No, it's clearly not. The way an I3C master is supposed to switch from open-drain to push-pull during a transaction or the concept of IBIs are the first things that come to mind, but I guess you have plenty of other reasons preventing you from implementing a i3c-bit-bang master.