From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Lawnick Subject: Re: Decode dimms on dual socket machines Date: Thu, 14 Apr 2011 13:42:19 +0200 Message-ID: <4DA6DD9B.40208@gmx.de> References: <4DA4250A.3060907@fuckner.net> <20110412132611.045ace21@endymion.delvare> <4DA44B05.906@fuckner.net> <20110412155345.4644e51c@endymion.delvare> <4DA53F22.5020105@gmx.de> <20110413103952.68bdb6fa@endymion.delvare> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20110413103952.68bdb6fa-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org> Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jean Delvare Cc: Michael Fuckner , linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-i2c@vger.kernel.org Jean Delvare said the following: > On Wed, 13 Apr 2011 08:13:54 +0200, Michael Lawnick wrote: >> I would expect a >> #> echo " 0x70" > /sys/bus/i2c/devices/i2c-0/new_device >> to span new buses, their numbers taken by random, even without platform >> data (not tried by myself yet, but will have to do it soon). > > Hmm, you're right, my memory that we has made platform data mandatory > was wrong, sorry. > >> The challenge will be to detect which of the 8 supported devices ( >> pca_9540, pca_9542, pca_9543, pca_9544, pca_9545, pca_9546, pca_9547, >> pca_9548) is actually to be used. > > In Michael's case it is irrelevant anyway, as the information he found > meanwhile clearly indicates that bus multiplexing is achieved by GPIOs > (most certainly on the ICH10) and not an PCA954x chip. The chip at 0x70 > is probably the Intel 5500 IOH. > Well, if he implements a multiplexer code for it, he is done :-) -- KR Michael