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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 44381CA9EA0 for ; Tue, 22 Oct 2019 04:57:05 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 0B4AE21783 for ; Tue, 22 Oct 2019 04:57:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="As9djylp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0B4AE21783 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+infradead-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=bombadil.20170209; h=Sender:Content-Type:Cc: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject: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=iGml12tO5DJZv8270er8z+SX0Km8jGzi5UzbLWibgTk=; b=As9djylpzsDFLGwiBsiDZ9jyz oYnpGY334tROqLsshZ2FQ57G1D6OIiOtjrjSQLf5DZGPyfOtJO+/eOA7Nzh72+BYCcn2DHGWlCXC+ gVCfw/0K66aWRmQnFLRr42JQBlbT71eG6bM0FuAB1veAUrysgQSPM6WgFXg2cwA3qGVoKoGy4StNq aWz3xYB6bVLiM9y+pCpCe1BUuEG8vXskQt+eagbk3nsDv9CnznIszzzl23gCMRRnf63k9cAwTTRfa gv6xVAPop76joP2meKF9dicf+Qe3gZM5yBcdI7nJnpSdpd5Gx5LBOxrUBXFekC//EH9OeyMRT/TT3 rzP2IQ7yg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMmEC-0006zB-Iz; Tue, 22 Oct 2019 04:57:04 +0000 Received: from sauhun.de ([88.99.104.3] helo=pokefinder.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iMmE8-0006yk-J1 for linux-arm-kernel@lists.infradead.org; Tue, 22 Oct 2019 04:57:02 +0000 Received: from localhost (x4e37421f.dyn.telefonica.de [78.55.66.31]) by pokefinder.org (Postfix) with ESMTPSA id 884872C0139; Tue, 22 Oct 2019 06:56:56 +0200 (CEST) Date: Tue, 22 Oct 2019 06:56:56 +0200 From: Wolfram Sang To: Jae Hyun Yoo Subject: Re: [PATCH i2c-next 1/2] dt-bindings: i2c: aspeed: add hardware timeout support Message-ID: <20191022045655.GA975@kunai> References: <20191021202414.17484-1-jae.hyun.yoo@linux.intel.com> <20191021202414.17484-2-jae.hyun.yoo@linux.intel.com> <0a629f7b-b829-c332-27d8-dc825205ff72@axentia.se> <7abf933b-cb18-10af-9c1b-163ec65ffae5@linux.intel.com> MIME-Version: 1.0 In-Reply-To: <7abf933b-cb18-10af-9c1b-163ec65ffae5@linux.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191021_215700_777061_97853D74 X-CRM114-Status: UNSURE ( 9.53 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "devicetree@vger.kernel.org" , "linux-aspeed@lists.ozlabs.org" , Andrew Jeffery , Benjamin Herrenschmidt , "openbmc@lists.ozlabs.org" , Brendan Higgins , "linux-i2c@vger.kernel.org" , Rob Herring , Joel Stanley , Tao Ren , Peter Rosin , "linux-arm-kernel@lists.infradead.org" , Cedric Le Goater Content-Type: multipart/mixed; boundary="===============5716356383810352818==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============5716356383810352818== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="WIyZ46R2i8wDzkSu" Content-Disposition: inline --WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Changes I submitted in this patch set is for a different purpose which > is very Aspeed H/W specific, and actually it's a more serious timeout > setting indeed. If this H/W is used in multi-master environment, it > could meet a H/W hang that freezes itself in slave mode and it can't > escape from the state. To resolve the specific case, this H/W provides > self-recovery feature which monitors abnormal state of SDA, SCL and its > H/W state machine using the timeout setting to determine the escape > condition. Thanks for the summary. I just wonder on what the timeout value depends. Do we really need to put in DT or can we derive it e.g. from the compatible value in the driver? --WIyZ46R2i8wDzkSu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl2ujBMACgkQFA3kzBSg KbYZZg/+ILRBsr6VA2yU97i07DYrhNgIs0GsfqAA3zqC+JhbF/dyORbZWno4fIxZ +qHvJ6pTQCR/jWA4aP1kO/NL9EU3nWIICyZHIFJpXBtwrH9mGP1+hlnyrWc2uaZC JpOw3AKSYevrQb0RksLu16ZddmlMHO0+Qi2rkhh4LGcsdCiUZRSOEeoaQkiyS3Cy hsb1uqiGFQFdq/gFv08rpW2ja7TGS/HMzs8RdXlOI03bL6ORXU9QCV6H2oIBl00v 9YQYHo9lV5PtRTweCpaN0o+9XLmP1y4A7kHS1lr9YVoRVT67HniEisum3t6UPR2H B5Ha1IVzBYuqtoq0vhuiowNVmV9OROoM+alQxhw3g6HPT0K+d5GmD9k6aPNXWCod rBT7QTBslplAZJNo6R2tGvh0wIYWU0PMJ+ZSsS9YdigSqMXfd8C1p2R6ZphdyCk7 dHfEaPa4iuUGYaJWiHFROYni/GhG1EBN3kpUSphG5ETA6Ur16blwXyAZy7oVm5xO IsIVfsJYBiV/1O77xE7FUF8gXpIalsLLH7/AXH80JexMqZBpu5hg6N6GhbN7K4rl wZBpfCNq9Rvy65BvFL4Vmw2elrZmo9S7vYs907eZ1ZJNWB9TVpqe+z0c9FNMuAKx o1ZttPvRuKUhoQTMnQ734eW74vmmrl4IfguSGshRymILa5AaX1Q= =INXh -----END PGP SIGNATURE----- --WIyZ46R2i8wDzkSu-- --===============5716356383810352818== 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 --===============5716356383810352818==--