From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f8KKz-0003li-FI for barebox@lists.infradead.org; Tue, 17 Apr 2018 06:43:35 +0000 Date: Tue, 17 Apr 2018 08:43:20 +0200 From: Sascha Hauer Message-ID: <20180417064320.hw3helj6mtr5a3v4@pengutronix.de> References: <38a86524d3ed4ff2b2306a3bb52fb312@eckelmann.de> <20180416101939.yggybypgs3ahr76b@sapphire.tkos.co.il> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20180416101939.yggybypgs3ahr76b@sapphire.tkos.co.il> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Question about =?iso-8859-15?Q?barebox?= =?iso-8859-15?Q?*=2Fdrivers=2Fmfd=2Fmc34704=2Ec_and_ACCURATE_I=B2?= =?iso-8859-15?Q?C?= mode ... To: Baruch Siach Cc: "Mainz, Roland" , barebox@lists.infradead.org Hi Roland, On Mon, Apr 16, 2018 at 01:19:39PM +0300, Baruch Siach wrote: > Hi Roland, > = > On Mon, Apr 16, 2018 at 09:52:14AM +0000, Mainz, Roland wrote: > > Two small questions about drivers/mfd/mc34704.c in the barebox codebase: > > 1. mc34704 has an ACCURATE bit (I2CSET1, see = > > https://www.nxp.com/docs/en/data-sheet/MC34704.pdf) which requires that= all = > > read/write commands are send twice - does the barebox code have any sup= port = > > for that in the current versions ? > > 2. Is this "accurate I=B2C communication mode" enabled by that bit a = > > vendor-specific protocol extension or is it part of the I=B2C standard ? I never heard of "accurate I=B2C", it must be something the chip designers have invented. Also there is no support for it neither in the mc34704 driver nor in the generic I=B2C support. Sascha -- = Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox