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 24D33C3A59F for ; Sat, 31 Aug 2019 09:50:01 +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 EB36622CE9 for ; Sat, 31 Aug 2019 09:50:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="TcLG5r96" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EB36622CE9 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=SYxqGa7gQPuufwtt/l94E7yjCOBMmu0zNQleQNFn4Cw=; b=TcLG5r96qvh4XK0wi5RMnDjtN Nw4Qlqdlha3OHIi8tkOhAvGvPDuVz2uLwWArIdDGm2GwshEE/rY8L1g33wJgPCiJUH4xI4GtS32GT PtpiEbIqUHhyFbPb5R9Pfj9y4iGFs3HIgWqeFIqpjoVTclUZL/q1/CO2jiVejs3LbXR2Az3lyQxV9 szJ/6TV6BKKqQxk0bcPnWfyaTGs8RXoWui1hAdvN4RanP0x7yr3vAigVWjeFtn1brK3ir/Fcb3e/x n3Pk9pL20eWVS6dH3xvdml+8KTxNkHN9/j3orq1S5rCWoNEtIEsBJuRnzW+DzeKCT2UF38sYnY1AW aQJOsgjAQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i400y-0002cZ-Ms; Sat, 31 Aug 2019 09:49:48 +0000 Received: from sauhun.de ([88.99.104.3] helo=pokefinder.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i400v-0002bM-2J for linux-arm-kernel@lists.infradead.org; Sat, 31 Aug 2019 09:49:47 +0000 Received: from localhost (p5486C98B.dip0.t-ipconnect.de [84.134.201.139]) by pokefinder.org (Postfix) with ESMTPSA id 649852C0093; Sat, 31 Aug 2019 11:49:41 +0200 (CEST) Date: Sat, 31 Aug 2019 11:49:41 +0200 From: Wolfram Sang To: Ray Jui Subject: Re: [PATCH v1 1/1] i2c: iproc: Add i2c repeated start capability Message-ID: <20190831094940.GA1138@kunai> References: <1565150941-27297-1-git-send-email-rayagonda.kokatanur@broadcom.com> <20190830125626.GC2870@ninjato> <3e70fa7e-de13-4edd-2e17-b7c56e91d220@broadcom.com> MIME-Version: 1.0 In-Reply-To: <3e70fa7e-de13-4edd-2e17-b7c56e91d220@broadcom.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-20190831_024945_253919_431D64A7 X-CRM114-Status: GOOD ( 10.28 ) 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, Lori Hikichi , Florian Fainelli , Shivaraj Shetty , Rayagonda Kokatanur , linux-kernel@vger.kernel.org, Icarus Chau , Rob Herring , bcm-kernel-feedback-list@broadcom.com, linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: multipart/mixed; boundary="===============7752887759741897122==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============7752887759741897122== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="AhhlLboLdkugWU4S" Content-Disposition: inline --AhhlLboLdkugWU4S Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Ray, > > With all the limitations in place, I wonder if it might be easier to > > implement an smbus_xfer callback instead? What is left that makes this > > controller more than SMBus and real I2C? > >=20 >=20 > Right. But what is the implication of using smbus_xfer instead of > master_xfer in our driver? >=20 > Does it mean it will break existing functions of the i2c app that our > customers developed based on i2cdev (e.g., I2C_RDWR)? If the customers uses I2C_RDWR (and it cannot be mapped to i2c_smbus_* calls) then this is an indication that there is some I2C functionality left which the HW can provide. I'd be interested which one, though. >=20 > 1) Does Maybe you wanted to describe it here and it got accidently cut off? Regards, Wolfram --AhhlLboLdkugWU4S Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl1qQrAACgkQFA3kzBSg KbbmbQ/9E9Ts1/5jZMraYl7CNxsXtWMbdSUWQFyuZDJGvO7UvZz9v7O0Aq9ct/MB mMb4lMVP4lLM/y1DMpVmoYoqVXyKPXzvMzGzsB0CMCs5e+XCbWKr1yCaDCLv0/Js HNbEe7PC1fuNz/YklNtYvHEe1LjSxf81lFWoLDFGPZ4FkSDcbUAZQkUfe/VpcKbc VVhYAQucc6GrBoJ12UMRSWSf3diIkR0CBqKhALZXCnrSLx9cXtTuqA0k7UnN9Piv qPZs/I20tTu52RCHXTpjnwFpWMLNuswRIoCWcMR6Vl1Ix6v0TB4NiUpMStk4Pw45 KD6hdZSPBtFM4uQ04M7wbVFR634PF4mQx7wts+VjFXBe6rxEASwpIq3dMtxVFWgs GwZ2tyZDQBT/jqdJi2QyUsKw4UW2R7su3D3+/idNTtoT1JkqwAfsFix283Bcbees Kmx1W32dzB7p2G0k2vCWmNWx1CI+Mf/K16H0n2ffyD/5t4vCME7kLeIVcqkYNF7l i98hRkYVJm3iecvg2iVr5/y6a7T/V248YJl59WTs7ycb3wqZJib5hQDOmMKeZbmS DrKSbdHwlistLsHnatTQxOz8vlHG6ufoAXBy+x3PXs1b+HD21Zh94ugVqgoOHoSm xqIQaulWFBYVg6xi2y9ZyEPyKo4KEwBBmNFs4eTCPmSgTvKT3lg= =mcNR -----END PGP SIGNATURE----- --AhhlLboLdkugWU4S-- --===============7752887759741897122== 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 --===============7752887759741897122==--