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=-3.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 0DA38C433ED for ; Wed, 7 Apr 2021 18:21:40 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 91C326120E for ; Wed, 7 Apr 2021 18:21:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 91C326120E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=the-dreams.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; 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=pC2XbQGJXcItFns3kIku0FaKZx/hnmlUlIaJG8TqfCg=; b=ggAwqmSlar0NZM636d2yFjwKB CuM7vjmUDIjdIQsnXkikL2O3P9PU10KxnBzzNaeKrQepLoOdCNfxw8R1ZEJYTbsmzsDQcwbG0GWgW 6srCB7RUBY9yV2BdgKQGpPiIj88GxE0eQoKf0xtqc9VLCls+EwknMwuNLuptMdeayf3nZuUI+fve5 RQMa8DAQQlQVs28NjN7T/SjAq9FxsIs8HcN0eO5JIg5+QMEBINfQF69yUCcim+nB7cMb8lRcOJy4Y wEQPljvnn/iC9s++sUnv092pOaI5+WyCdbO02iBayiNiO0sIXzkfjSyaqUY3MoL0uRKrK3cu/buUq I6kUXTVmg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lUCmL-005jMQ-MI; Wed, 07 Apr 2021 18:19:49 +0000 Received: from sauhun.de ([88.99.104.3] helo=pokefinder.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lUCmI-005jLv-HI; Wed, 07 Apr 2021 18:19:48 +0000 Received: from localhost (p5486cf96.dip0.t-ipconnect.de [84.134.207.150]) by pokefinder.org (Postfix) with ESMTPSA id A2B1F2C04E4; Wed, 7 Apr 2021 20:19:45 +0200 (CEST) Date: Wed, 7 Apr 2021 20:19:36 +0200 From: Wolfram Sang To: Qii Wang Cc: matthias.bgg@gmail.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com, leilk.liu@mediatek.com Subject: Re: [RESEND] i2c: mediatek: Get device clock-stretch time via dts Message-ID: <20210407181936.GA1614@kunai> Mail-Followup-To: Wolfram Sang , Qii Wang , matthias.bgg@gmail.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, srv_heupstream@mediatek.com, leilk.liu@mediatek.com References: <1615622664-15032-1-git-send-email-qii.wang@mediatek.com> <20210406194856.GF3122@kunai> <1617797706.32076.1.camel@mhfsdcap03> MIME-Version: 1.0 In-Reply-To: <1617797706.32076.1.camel@mhfsdcap03> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210407_191946_679886_086BA7E2 X-CRM114-Status: UNSURE ( 8.43 ) X-CRM114-Notice: Please train this message. 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="===============2142352092007910871==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============2142352092007910871== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="RnlQjJ0d97Da+TV1" Content-Disposition: inline --RnlQjJ0d97Da+TV1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > Due to clock stretch, our HW IP cannot meet the ac-timing > spec(tSU;STA,tSU;STO).=20 > There isn't a same delay for clock stretching, so we need pass a > parameter which can be found through measurement to meet most > conditions. What about using this existing binding? - i2c-scl-internal-delay-ns Number of nanoseconds the IP core additionally needs to setup SCL. --RnlQjJ0d97Da+TV1 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmBt97QACgkQFA3kzBSg KbZGCxAAjTn07oN3fOfLU6hpW7yIEBiz+GxSzByvRRuqIrVft8GqetCvK5oMvd7p diD/VhZ+4P1kw4/mA6zzsRpNJNerUBPeQ7xsF7cFMU7cfvG6A0zUuOieWM7+zwvw zCllS2a+a9Pld3QZQKhQKySazasct2LvhDh2HOpiNwm+mtmpWFur1c2Wra+JovF1 soq+CYPCOB/5OkZvEGhpsXIvoCJp1/hlx3hEuAGPh34ZkOOWoZBXty6yJJsTOH+m r25H0sceNddaabw05fs+F90zs5Y6wgyCvaIp1mT/R51HKOHzR7dVLq+JZhy+AZKN uQeGtveLnr8BcS3gud44R3AhBpejil8h0DNYd2BMGp7bqOujiWbK/GkRTfT/gnZA w+omah9S/tGhZKT9RY/6lFjeI1mn+r1A3vmHfjT5WiONjMLcHLe9+5SvK/N4vfxw cqEahaLoa8TkOOD7MI5gZROtwe4BDWtFdmyujWbql9a0lO/QGzGuchKgfBCDHGZD WF35ChYRvunAJr3dyfbaThKS7/KpolBLQz+z4Hs2x7PkRmvyK18AIJkdv/d7c82O scccsm6zgp1151zd9CfFKm355CmCgfUDU/naFCEic8HsmWAjc/gxjkNYpQyUjNPP +BjFP14MBlLhaAC2vGVJTqKQnStBlWAfbUr8vaV6yL/0hBnamxQ= =zMkw -----END PGP SIGNATURE----- --RnlQjJ0d97Da+TV1-- --===============2142352092007910871== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============2142352092007910871==--