Thanks guys, your thoughts and hints helped me a bit and I think it´s running fine now.
@David: I2C was setup correctly. I can read and write all the registers manualy with the i2c tools. @Willian: Just as you thought, after I wrote to the RTC I don´t get the error when reading anymore, thanks. When i wrote the time to the RTC for the first time with hwclock -w -f /dev/rtc1 I got the same error although it´s working fine. hwclock: ioctl(RTC_RD_TIME) to /dev/rtc1 to read the time failed: Invalid argument -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/1469d6f0-dbb3-4d61-bdd3-f76591bcf3b5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
