The HW-clock on my Vybrid Armstone A5 PCB does not accept a date.
I set the date with
# date "2016-07-03 18:54"
-> Sun Jul 3 18:54:00 UTC 2016
and then setting the HW clock fails with
# hwclock --systohc
-> rtc-pcf8563 3-0051: pcf8563_set_datetime: err=-5 addr=02, data=06
-> hwclock: RTC_SET_TIME: Input/output error
In the past this forum mentions issues like
-RTC not working at all or
-high power consumption, thus using an external HW clock chip instead of the internal one.
However, I do not know how to resolve this issue.
Below the boot messages:
Linux version 3.0.15-F+S (keller@VBFedora14) (gcc version 4.7.2 (crosstool-NG 1.18.0 - for F+S boards and modules) ) #1 Fr4
CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c53c7d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: F+S Elektronik Systeme GmbH, armStoneA5
armStoneA5 Board Rev. 1.10
rtc-pcf8563 3-0051: chip found, driver version 0.4.3
rtc-pcf8563 3-0051: pcf8563_get_datetime: read error
rtc-pcf8563 3-0051: rtc core: registered rtc-pcf8563 as rtc0
snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc1
Welcome to F+S-Vybrid
fsvybrid login: root
# uname -a
->Linux fsvybrid 3.0.15-F+S #1 Fri Aug 22 09:50:12 CEST 2014 armv7l GNU/Linux