The RTC uses the ds1307 kernel driver and you're correct, it shows up as rtc1. It is loaded when the capemgr instantiates the device tree, since the driver is in the CryptoCape DTS file. So you shouldn't need any init.d/systemd scripting it should "just work"TM.
You'll have to set the clock once and then it should hold pretty well. In testing think I had a bum battery b/c it depleted rather quickly. Once I changed batteries it seems to be holding steady. On Thu, May 29, 2014 at 7:28 PM, Mike <bellyac...@gmail.com> wrote: > On 05/29/2014 07:17 PM, Joshua Datko wrote: > >> The CryptoCape, a collaboration between SparkFun and myself, is now >> available for purchase at SparkFun Electronics [1]. In short, the cape adds >> some hardware crypto chips, a RTC with battery, and an ATmega328p which is >> designed to be flashed from the Beagle. It will be officially announced on >> the "new products Friday" post tomorrow, but I think this group deserved an >> early announcement. >> >> Thanks to BeagleBoard.org for making a great platform and special thanks >> to Robert Nelson for backporting the TPM driver to 3.8. >> >> This community is awesome; I've learned so much by following this list. >> Thanks to everyone who shares their time and knowledge. >> >> There's only 1 left :) >> >> Happy Hacking! >> >> Josh >> >> [1] https://www.sparkfun.com/products/12773 >> >> How is the RTC implemented at the software level? More to the point > perhaps, how early in the boot process does the system time get set from > (presumably) rtc1? > > About a month or so ago I setup a battery backed RTC, along with a fairly > current systemd. Systemd have chosen to rewrite hwclock and last I looked > it still only honored/used rtc0. Perhaps I didn't explain the situation > good enough on the systemd mailing list, but I couldn't seem to get past > anyone not understanding why a board wouldn't have a battery backed RTC on > board. Having said all that I did get it working just using init.d > scripts. Just seems like such an ugly hack when the whole point of systemd > is to essential do away with all the scripts. > > The board looks like something very interesting to explore. I'm sure one > will find its' way here when cash flow permits. > > Mike > > > -- > For more options, visit http://beagleboard.org/discuss > --- You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/beagleboard/NhMSP9ywlzg/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > beagleboard+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
