Op 16 jun 2011, om 16:45 heeft Darren Hart het volgende geschreven: > > On 06/15/2011 09:25 PM, Bruce Ashfield wrote: >> On 11-06-15 10:23 PM, Lu Jingdong wrote: >>> On 06/16/2011 01:33 AM, Darren Hart wrote: >>>> >>>> On 06/15/2011 09:52 AM, Bruce Ashfield wrote: >>>>> On 06/15/11 12:48, Darren Hart wrote: >>>>>> >>>>>> On 06/15/2011 06:31 AM, Bruce Ashfield wrote: >>>>>>> On 06/15/11 09:25, Koen Kooi wrote: >>>>>>>> Op 15 jun 2011, om 15:21 heeft Bruce Ashfield het volgende >>>>>>>> geschreven: >>>>>>>> >>>>>>>>> On 06/15/11 06:41, Jingdong Lu wrote: >>>>>>>>>> From: Jingdong Lu<[email protected]> >>>>>>>>>> >>>>>>>>>> Ensure msecure is mux'd to be able to set the RTC for >>>>>>>>>> beagleboard. Fixes bug [YOCTO #767] >>>>>>>>> Jingdong, >>>>>>>>> >>>>>>>>> The fix looks reasonable to me, Darren has been refreshing the >>>>>>>>> beagleboard support as well, so I've cc'd him here to see if we >>>>>>>>> have this change present in the work in progress trees. >>>>>>>>> >>>>>> >>>>>> I do not have something similar queued. >>>>>> >>>>>> >>>>>>>>> What tests did you run to ensure that the RTC worked on the >>>>>>>>> beagleboard ? There was some debate around whether or not you >>>>>>>>> needed an add-on card to get this functionality available ? >>> The signal "msecure" on TPS65950 connects to "msecure" on OMAP3530 and >>> setting/writing RTC register is controlled by >>> OMAP3530 "msecure". So we should pull the "msecure" high on OMAP3530 so >>> that we can set/write RTC register on TPS65950. >>> >>> We test RTC on beagleboard by adding this patch. RTC can be set a >>> correct date and >>> it works well when power on. >>>>>>>> You need to remove some resistors and add a battery, or add an >>>>>>>> expansionboard like the zippy or zippy2, which have a DS1307 RTC >>>>>>>> with battery. >>> Because there is no backup battery on beagleboard C4, RTC can not be >>> saved when >>> power off. If we want to keep RTC without power, we should remove R66 >>> and install >>> a battery on board. >> >> Ack'd. For me, this is reasonable. Having a working RTC even >> if it doesn't survive power cycle is worth having. In particular, >> since the patch is simple. > > > Agreed.
FWIW, it survives warm resests. regards, Koen _______________________________________________ yocto mailing list [email protected] https://lists.yoctoproject.org/listinfo/yocto
