From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE498C48BE6 for ; Wed, 16 Jun 2021 15:55:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BB8F261185 for ; Wed, 16 Jun 2021 15:55:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234838AbhFPP5c (ORCPT ); Wed, 16 Jun 2021 11:57:32 -0400 Received: from mout.kundenserver.de ([212.227.126.135]:37293 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235033AbhFPPzn (ORCPT ); Wed, 16 Jun 2021 11:55:43 -0400 Received: from [192.168.1.155] ([95.115.35.150]) by mrelayeu.kundenserver.de (mreue011 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MlwJv-1lT2i31xRr-00j4qj; Wed, 16 Jun 2021 17:52:24 +0200 Subject: Re: [PATCH V3 1/3] gpio: Add virtio-gpio driver To: Bjorn Andersson , Linus Walleij Cc: Viresh Kumar , Geert Uytterhoeven , Bartosz Golaszewski , "Enrico Weigelt, metux IT consult" , Viresh Kumar , "Michael S. Tsirkin" , Jason Wang , Vincent Guittot , Bill Mills , Alex Benn?e , stratos-dev@op-lists.linaro.org, "open list:GPIO SUBSYSTEM" , linux-kernel , Stefan Hajnoczi , "Stefano Garzarella --cc virtualization @ lists . linux-foundation . org" , virtualization@lists.linux-foundation.org, Alistair Strachan References: <10442926ae8a65f716bfc23f32339a6b35e51d5a.1623326176.git.viresh.kumar@linaro.org> From: "Enrico Weigelt, metux IT consult" Message-ID: <8d58da79-8e54-048b-db89-8c1caaa0320f@metux.net> Date: Wed, 16 Jun 2021 17:52:22 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: tl Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:zYV2Vb8N523yfGwaAamnyOfO9IKmEQnqd6sTMik2ROSZ7cvYmAN P+VxcmAsXGX6vzb4SRBaxlBoX7KUvdrVZZEJEWZNpRygC9ACFb6Hfn33WlquBmdPoOQZvXX VSqVi2NWO7+sNcnkirbpTVkxHEPc7Jh96VOoZzzK8GfiJ2t1meINaY99JOXByCRWhC1rvRg AGnmOmcNFRqNPwmCe/9/A== X-UI-Out-Filterresults: notjunk:1;V03:K0:bYb/owV9rlA=:ixDRRrjFdE2oUtq7B2uSI1 VEXzB2qPM57T1OTriUP7i36IyDMD7R0aEPbCSak0OhU9eTyIcubcYk4ewmTdNVQOX2CrX9zus lj25xXuGUiQgI92OTRbDtrIzc/DWsqS+dZVA5dC7L4Q7Kscv4UqI+5UcmZ8vANAtwyCuJx4Cb 7fvWxGC0d2X3mHk9oVXX5bh+NhcqwJJIUVzAJBbnlxDcN00BsIJFqDZjNvLv6S3kOCOooUY4/ 5iMYR9VvrPtCX0StbrMKitflvTjyfcw+HB9Ju2BAGVW5YanTpQjc2WaEui2vykhL1RJ2BMVHQ CD5vZ8JhGdMGu4zMa1/hWSwitBK3L2Ygpkc+sf16cGMoFwKTGATc16XIqFuYAcMMSeFnfg2Kp vwfr4U/Sfvt7HhWkWJRnZGorVVXY7t5VZ10YK8iakVeG1aIHplvTCYZ6WOfGO+DahUv97SB9v aUF9bPHxMB8QjZx/7Od2CXy18DqA0zszh32Xrn4iHELpnRg+FZ4GX6qnL3QEX1bAzEzTJRQxZ 63s4fqdKFtSdtj1IKOVp2M= Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On 16.06.21 05:30, Bjorn Andersson wrote: > Combined with the virtio-i2c effort this could provide an alternative by > simply tunneling the busses and GPIOs into Linux and use standard iio > drivers, for cases where this suits your product requirements better. So, you wanna use virtio as logical interface between the two CPUs ? Interesting idea. Usually folks use rpmsg for those things. What is running on the secondary CPU ? Some OS like Linux or some bare metal stuff ? What kind of CPU is that anyways ? --mtx -- --- Hinweis: unverschlüsselte E-Mails können leicht abgehört und manipuliert werden ! Für eine vertrauliche Kommunikation senden Sie bitte ihren GPG/PGP-Schlüssel zu. --- Enrico Weigelt, metux IT consult Free software and Linux embedded engineering info@metux.net -- +49-151-27565287