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[2620:137:e000::3:7]) by mx.google.com with ESMTPS id o198-20020a0dcccf000000b005a7f9634341si2752481ywd.151.2023.10.27.08.11.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Oct 2023 08:11:53 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) client-ip=2620:137:e000::3:7; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=M7Tox+EP; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:7 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by snail.vger.email (Postfix) with ESMTP id 35E7A804922A; Fri, 27 Oct 2023 08:10:40 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at snail.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345869AbjJ0PKd (ORCPT + 99 others); Fri, 27 Oct 2023 11:10:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345761AbjJ0PKb (ORCPT ); Fri, 27 Oct 2023 11:10:31 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B0FA186; Fri, 27 Oct 2023 08:10:29 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C442BC433C8; Fri, 27 Oct 2023 15:10:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698419429; bh=3r7xLVB/33N6eW6JZ8mBeFHH+Vxfd0dBSng3u4hQHuw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=M7Tox+EP+YZ40+qnL5aKwDE4TCG0TwU4deeG2ZWuk2gwZ6CrGZuRPysbypIFvBDjY 2FZbPgmNw78st01FrxeaaBYK4tHDgLZWZLnpqITOOgMvJxvGU0KZfk7Jxdm8SPE5Sm AIZtC54bori4FJdhXTV25M64eYkpWENCnKHSngyBax1xM5OEvW67/bGDV4LJckiDbw KYvmkCshe+KHB4duxKeFxbuoXGFPszceJ22lcGLoUemjcdPdV4qYnAyPWHFxtA6nRh tJeQkoaLqsMZmNFMmjweWTWT7S57K9i5gGD2HyRH20cdHRI8RZ2Vfd4yqrJ6NlkJab +/nJKuDCY0MGg== Date: Fri, 27 Oct 2023 16:10:25 +0100 From: Mark Brown To: Krzysztof Kozlowski Cc: Chris Packham , gregory.clement@bootlin.com, andi.shyti@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, Abel Vesa , linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 2/2] i2c: mv64xxx: add an optional bus-reset-gpios property Message-ID: References: <20231027033104.1348921-1-chris.packham@alliedtelesis.co.nz> <20231027033104.1348921-3-chris.packham@alliedtelesis.co.nz> <65911ec0-e073-435f-846a-c5501dd5d3a9@linaro.org> <9eebec9b-e6fd-4a22-89ea-b434f446e061@linaro.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="q3PUvKqoLZyuYIzn" Content-Disposition: inline In-Reply-To: <9eebec9b-e6fd-4a22-89ea-b434f446e061@linaro.org> X-Cookie: Save energy: Drive a smaller shell. X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Fri, 27 Oct 2023 08:10:40 -0700 (PDT) --q3PUvKqoLZyuYIzn Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Oct 27, 2023 at 01:37:05PM +0200, Krzysztof Kozlowski wrote: > The (2) above is not solveable easy in kernel and we already had nice > talks about it just few days ago: > 1. Apple case: > https://social.treehouse.systems/@marcan/111268780311634160 Note that the Apple case is not a reset, it's a low power mode for the device, though at the GPIO level the beheviour with tying together multiple devices that need to coordinate their usage looks very similar. --q3PUvKqoLZyuYIzn Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmU70uEACgkQJNaLcl1U h9B9Pwf/WBrIIzuUnzHdkc09HWdtnvPUwYs6X+fca/zq/zFhxQ9jWLTGnUFTQfrg jGK2NMhCCyTu0X/QzNnXwYRiObbDBfM/cLsFOsGmhpwtvq9BeCRNxDjTtU2wHuMu 17cXEy2O/OaXFncg4LWiiaGTT79DXwpWvTbJ/1pGCvrrCLuxCU9X5s4hu18+YOGF lriZr0BZMEpbds/cEsT4K/ftrKRbiytbc4mx+VSPWqV1kAsnURdCwJ/udPq+jT0K s1J82Mf/xYQ7CxwpGtMvEnVJGwlScIdRAV2VqZur1+cAuY33cu2F2+2oHbFZewXG grSXvz4i+lGwWPIE13ubkq4mXNXGGg== =1Tes -----END PGP SIGNATURE----- --q3PUvKqoLZyuYIzn--