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[2620:137:e000::1:18]) by mx.google.com with ESMTPS id h13-20020a170902f54d00b0015898ae35d0si3037026plf.119.2022.04.15.19.28.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Apr 2022 19:28:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=DS7sMqDh; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 41CABF9FAB; Fri, 15 Apr 2022 18:40:28 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234008AbiDOVr7 (ORCPT + 99 others); Fri, 15 Apr 2022 17:47:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57548 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231153AbiDOVr5 (ORCPT ); Fri, 15 Apr 2022 17:47:57 -0400 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6B4CFD3D; Fri, 15 Apr 2022 14:45:27 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 16B97CE3148; Fri, 15 Apr 2022 21:45:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9AA9DC385A4; Fri, 15 Apr 2022 21:45:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650059124; bh=V5KT44zPHxdCxuNBGuMKnFW9ZbwhdDrnA6iBRSGQ7vQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=DS7sMqDhP6BN4P+4XoZIfUGbu/o3sR3fZ+6iL0ZMl+Im6dYDzvRdBGCiiuO9RNylS +eLZYgVvsuSpgPob6xXc+N0gQrD9YuIzUpWd56w9kCU9ojhPBWdFzHUFDTCrZEmTxx BtqW1viPUPx8drlUAJGe5Y0w/gtzk/rTpD2zzT7aX/7i/MEsjNq68GDhHIbTVnZOMk VYEf6Ii9ejLP4+K8Soth9DGY8Zvdee3vVmWL6zkmRLV5Fzr3lppRo/cjdIxdzu8NVW +yxWQWqG0ipsAt5Qil34ObZLuEfJr426IZwaCCrZy8+ctQYMJCY7SrPYmBFE2BTnHh EHREuVLdHy/ag== Date: Fri, 15 Apr 2022 23:45:20 +0200 From: Wolfram Sang To: Lucas Tanure Cc: Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 2/2] i2c: meson: Use 50% duty cycle for I2C clock Message-ID: Mail-Followup-To: Wolfram Sang , Lucas Tanure , Neil Armstrong , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org References: <20220409164334.157664-1-tanure@linux.com> <20220409164334.157664-3-tanure@linux.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="f8SdR9ouA5qGgT1k" Content-Disposition: inline In-Reply-To: <20220409164334.157664-3-tanure@linux.com> X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable 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 --f8SdR9ouA5qGgT1k Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Apr 09, 2022 at 05:43:34PM +0100, Lucas Tanure wrote: > The duty cycle of 33% is less than the required > by the I2C specs for the LOW period of the SCL > clock. >=20 > Move the duty cyle to 50% for 100Khz or lower > clocks, and (40% High SCL / 60% Low SCL) duty > cycle for clocks above 100Khz. >=20 > Signed-off-by: Lucas Tanure Applied to for-next, thanks! 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