From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YptVi-0000E1-MQ for barebox@lists.infradead.org; Wed, 06 May 2015 07:12:51 +0000 Date: Wed, 6 May 2015 09:12:28 +0200 From: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= Message-ID: <20150506071228.GQ25193@pengutronix.de> References: <5548DA0A.3050408@elfin.de> <20150505155450.GB6325@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20150505155450.GB6325@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: Usage of i2c_-Tools in Barebox To: Marcel Behlau Cc: barebox@lists.infradead.org Hello, On Tue, May 05, 2015 at 05:54:50PM +0200, Sascha Hauer wrote: > On Tue, May 05, 2015 at 04:56:10PM +0200, Marcel Behlau wrote: > > i'm using a phyFLEX-i.MX6 SBC and want to communicate with an > > external =B5C over I2C. I only want to read/set 1 register, so i tried > > to use the builtin i2c_read and i2c_write-Commands. The =B5C is > > connected to i2c-bus 1 of the device, so i tried to probe the hole > > bus with "i2c_bus 1 3 30". The command only answered with > > "i2c_probe: No such device". I tried also the busses 0-3, with the > > same result. I searched in the board.c sourcecode of the phyflex, > > but couldn't find i2c related stuff, so i think, i have to add the > > initalisation for the i2c. > > = > > Do i have to add the i2c-init in the boards/phytec-pfla02/board.c > > -file? Is there some documenation about this stuff? > = > The phyFLEX board is device tree based. You have to enable the i2c > controller in the dts file (same as you would do in the kernel). > Usually a: > = > &i2c0 { > status =3D "okay"; > }; > = > Should be enough. You probably also have to add the proper pinctrl node. and enable the i2c driver. You might want to check the output of devinfo. Best regards Uwe -- = Pengutronix e.K. | Uwe Kleine-K=F6nig | Industrial Linux Solutions | http://www.pengutronix.de/ | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox