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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 D0A77C433DF for ; Thu, 14 May 2020 14:50:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B0C4220728 for ; Thu, 14 May 2020 14:50:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726610AbgENOuI (ORCPT ); Thu, 14 May 2020 10:50:08 -0400 Received: from sauhun.de ([88.99.104.3]:52610 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726176AbgENOuI (ORCPT ); Thu, 14 May 2020 10:50:08 -0400 Received: from localhost (p5486CC88.dip0.t-ipconnect.de [84.134.204.136]) by pokefinder.org (Postfix) with ESMTPSA id 284FF2C01E6; Thu, 14 May 2020 16:50:06 +0200 (CEST) Date: Thu, 14 May 2020 16:50:05 +0200 From: Wolfram Sang To: =?utf-8?Q?Adamski=2C_Krzysztof_=28Nokia_-_PL=2FWroc=C5=82aw=29?= , Peter Rosin Cc: "linux-i2c@vger.kernel.org" Subject: Re: Two separate i2c transfers Message-ID: <20200514145005.GC1589@ninjato> References: <5a17ba7b-b1a5-234d-1cae-4e77132bd15d@nokia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="R+My9LyyhiUvIEro" Content-Disposition: inline In-Reply-To: <5a17ba7b-b1a5-234d-1cae-4e77132bd15d@nokia.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org --R+My9LyyhiUvIEro Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Krzysztof, On Thu, May 14, 2020 at 02:41:17PM +0200, Adamski, Krzysztof (Nokia - PL/Wr= oc=C5=82aw) wrote: Adding Peter as the mux maintainer to CC. > I have a problem that I think cannot be currently easily addressed by I2C= framework in the kernel and I'm seeking for an > advice on how to approach this. I have an I2C device that can be accessed= from two I2C masters connected to I2C bus > master selector channels. Both masters must do such a sequence before per= forming long operation: I need a diagram of that setup. What is the BMS? A chip? Some software? Can you draw a graph and give names of chips etc...? And, of course, why on earth do you need to access the same chip from two masters within one Linux? :) (That's how I understood it) Regards, Wolfram --R+My9LyyhiUvIEro Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl69WpkACgkQFA3kzBSg KbadAA//QxDhwSyLcQNQrmBdcSmt94BrT3UWI0N+sQJJHm177HEwIT6k7F+atAl1 TkTyx4QxkEQKiUxp9ZzmdUY488bdqAcehLDkG9AB+qpbU/KtY2qIIH/UUF5q7b/C UXRloCOqG2g1qYxig+RHdNsA5arrMemUiX/ZVZ1AyRghnmRDZROdWV8G0cUTZ5sm LXYmE96la/ZvWm8JJu/qbmOo6N91F3aYDkkhIMX/R6jLVXdaq1Y674i57JEMGq2g wK4/GjfdRokY5xnHfI3EK1iP1M/uQrluBq289eBHcAr82K5brI8AMrwmF5IoYpIt FHD1ekmQrIzTYKoaabR96+lnYQR23dr9fZPXwfEDI0notrB9VX6LG2L1J3zOqec8 PwfDFTvP7p5/4zXFkinNmDRmjdI8BNoMmtNEAD3xg+sdPVI/abfXHD7YyoAmyJBz 2u0WoIqUG0/pgZ5TVHR/9N7+pUKTfKuzm/BQOWK5QJGo0zTzi5N2YlfiobjrLPUJ vQZaU6sRPN86uf1bfVp4QZa+Wp3t8kZCLhep517K1dNU/wmYG5cLpdS1BUopkeci NuNTtLbKO/W6IN99J+b4/Rg5BreHmtSZqbbOh2vBsBqgZ8RznR22a7OQiHowLTUT WiX/l2zYbclBN6k7nCYr6sIVApGtPKm3HCwb/C4ZH8cVJLTq+Mo= =hC9T -----END PGP SIGNATURE----- --R+My9LyyhiUvIEro--