From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Grandegger Date: Tue, 17 Mar 2009 14:33:30 +0000 Subject: Re: [lm-sensors] DS75: 12-bit support question Message-Id: <49BFB4BA.8070600@grandegger.com> List-Id: References: <49993BD6.7000303@grandegger.com> In-Reply-To: <49993BD6.7000303@grandegger.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lm-sensors@vger.kernel.org Hi Jean, Jean Delvare wrote: > Hi Wolfgang, > > On Mon, 16 Feb 2009 11:11:34 +0100, Wolfgang Grandegger wrote: >> Hello, >> >> I have just realized that there have already been an attempt to get >> 12-bit support into the LM75 driver: >> >> http://marc.info/?t0836918500008&r=1&w=4 > > Yes, I remember David (Cc'd) had been working on it. > >> But it's not obvious too me why it was finally abandoned. In the GIT log >> I just find: >> >> - More careful initialization. Chips are put into 9-bit mode so >> the current interconversion routines will never fail. >> >> What have I missed? > > I can't remember exactly either, I suspect there was some remaining > polishing that never happened and the patch was lost because of this. > This is also the time when we lost our hwmon subsystem maintainer, > which probably didn't help keep track of floating patches. But there is > no problem with adding 12-bit resolution support to the lm75 driver for > chips which have this feature, if you are interested and willing to > work on it. OK, I see. A customer was asking for 12-bit support, but I doubt that there is any benefit because the accuracy of the mounted DS75 is just +-2 degree. And most LM75 compatible devices are not more accurate, I think. If he decides to calibrate the dtt, e.g., I might get an opportunity to add to 12-bit support. Thanks, Wolfgang. _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors