Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932204AbaLBOQI (ORCPT ); Tue, 2 Dec 2014 09:16:08 -0500 Received: from sauhun.de ([89.238.76.85]:42217 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753777AbaLBOQF (ORCPT ); Tue, 2 Dec 2014 09:16:05 -0500 Date: Tue, 2 Dec 2014 15:15:48 +0100 From: Wolfram Sang To: Harini Katakam Cc: Mark Rutland , "grant.likely@linaro.org" , "robh+dt@kernel.org" , Pawel Moll , "ijc+devicetree@hellion.org.uk" , "galak@codeaurora.org" , "michal.simek@xilinx.com" , "soren.brinkmann@xilinx.com" , "linux-arm-kernel@lists.infradead.org" , "linux-i2c@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "vishnum@xilinx.com" Subject: Re: [PATCH 3/4] devicetree: bindings: Add defeature-repeated-start property for Cadence I2C Message-ID: <20141202141548.GA5883@katana> References: <1417514749-24319-1-git-send-email-harinik@xilinx.com> <1417514749-24319-4-git-send-email-harinik@xilinx.com> <20141202111907.GC23671@leverpostej> <20141202125203.GA4072@katana> <20141202131611.GC4072@katana> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="SLDf9lqlvOQaIe6s" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --SLDf9lqlvOQaIe6s Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > What do you do when disable repeated start? Sending STOP and START? If > > so, this is really something different than repeated start. By using > > I2C_FUNC_I2C a user expects repeated start, so if the HW does not > > support it, we should say so and don't try to emulate it with something > > different. >=20 > Yes, we send stop. As said before, this is wrong. Another master could interfere between the messages when using stop+start. This is no replacement for repeated start. --SLDf9lqlvOQaIe6s Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUfcmUAAoJEBQN5MwUoCm24eEP/2PWa38vuNrBPiCUbz9wxgOu z/2F/nNcMkD/iPU27G7oS6ujtFC5ntgrixjo3xsuGO+NvlbqVtEBWeChoxr4dnBX 2PGTumCXpQFAjNW4vn2crqIwAdf6s26VRpyWrXYId6ZI6TqljXB7pz477KGuHTdx bMbOI2m9KbNdHt8Oy+bknyKvlBHEQw06KzOZQSCagvWd1+wDAvlsASb9yy8uERFH atHK3oP2GgV9pJNrCjZqCH0u6GQisRpW+KGSPGnMo+zRrxqq8ek/LD3jkDjvDrC4 gX4x5oIS/wWzHnEP1PPdd7ZsMMZqzYG7ExjpxC7XkvalEuvY1M6BhQr4XknVQJy5 /xBHpmT/OWiwW75NjUi3wqys+dsZXPdPsKOcKWZbAVMUUT7vffvcAZ45y3PulHei rF7UXGjaNPmmtrg81GMBKR/7XK56eIvBeHiycLLdiHQmklusUoAg2D6KVy7Gylf8 T2WwTcR0aStS8ZbtqDT12JudJKbRjXK4g6ov1ZEAbkKRMuw7kpLi+kcmJz1Q3gZh FpPwMFB+F403v0sGj7OCOe9FQr7Mnpb5jT+IqDKuBMN6IIbu2y2CoTX8RhAz4894 4YDPyFLe0wWQKl1m8ZSLCwWCJewSDUTMx5Fv0HpcAoOJ4yWeNn+VOeQY9STbMFfw 4cZU9hb9Uw6jUEC5RUKa =rfTF -----END PGP SIGNATURE----- --SLDf9lqlvOQaIe6s-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/