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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 315E4C433F5 for ; Fri, 15 Apr 2022 21:46:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9rYE3+e0O/gKW9IDIl0iOB2Jh18iaxRP3tfTKBUalsI=; b=OV9JBOkPLlCOcePzk7n1PTXbpF qsHwMhao/5LNMfUuhCibx098LpLjT7oHBNtwR6svgfSPacDY2uExU7BM0oHMeVHHdVucEa+/zp4iL GtwRFuLKnysBU2EDhro3cqHaaG0+P56IG2NpU8oLrsIMUUTFAbtMIIWhd5/x19nfb4lC9E1gh98H8 ulTZ6B1HbdLV6FCpZGR7HF1LukTLGJ4UfuESxCL16YgjPmxoDLXz6fDJqrjvnthtPldFrRj0F1blE ysQJqXhz1XVcIGaEQ0zCez/C3dMcr1IS5LbwHYrdRes0DLePauOBv1DCqmwVlOrXqEe57YZ9NfHJY hbn8P/Kw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nfTkx-00BQ3n-Je; Fri, 15 Apr 2022 21:45:31 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nfTku-00BQ2b-6C; Fri, 15 Apr 2022 21:45:29 +0000 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 E7B1CCE311D; Fri, 15 Apr 2022 21:45:25 +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 In-Reply-To: <20220409164334.157664-3-tanure@linux.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220415_144528_460436_27FD7705 X-CRM114-Status: GOOD ( 10.96 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3143656939219679031==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============3143656939219679031== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="f8SdR9ouA5qGgT1k" Content-Disposition: inline --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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