Hello,
I have a strange behaviour of hardware clock under Linux on AM1808 (SOM-M1 + baseboard).
It seems to me, that RTC works in 12-hours mode, but hwclock system utility does not support it.
Some test sequences in command line:
root@am180x-evm:~# uname -a
Linux am180x-evm 2.6.37 #2 PREEMPT Tue Jul 5 17:47:10 CDT 2011 armv5tejl unknown
// It's uImage from psp in folder /prebuild-images
root@am180x-evm:~# date -s 2011.12.07-11:59:30
Wed Dec 7 11:59:30 UTC 2011
root@am180x-evm:~# hwclock -w
root@am180x-evm:~# hwclock
Wed Dec 7 11:59:33 2011 0.000000 seconds
//... wait about 30 seconds
root@am180x-evm:~# hwclock
Sat Dec 10 20:00:04 2011 0.000000 seconds
Look at date and hours values!!!
It's inpossible to set hwclock to any time after 12 o'clock:
root@am180x-evm:~# date -s 2011.12.07-23:59:30
Wed Dec 7 23:59:30 UTC 2011
root@am180x-evm:~# hwclock -w
root@am180x-evm:~# hwclock
Wed Dec 7 12:59:44 2011 0.000000 seconds
Ok, we can't set more then 12 oclock. Lets wait some seconds, end look at hours value...
root@am180x-evm:~# hwclock
Wed Dec 7 01:02:01 2011 0.000000 seconds
Wow! Like a 12-hours mode with am/pm indication! But where is it indication???
What's the problem? Where solution? Who is to blame?
rtc_driver? hwclock? Or I'm doing something wrong?
