When I run nvram-wakeup, it exits with the following
/dev/rtc: Device or resource busy
This is due to the fact that /dev/rtc is in use by chrony,
an NTP daemon.
Because /dev/rtc is used only for determining if the RTC
stores the UTC, my suggestion is to add a command line
switch that disable this control and lets the user specify
whether the RTC is UTC.
when -u is not given, auto is assumed
when -u is given with no option, utc is assumed
when -u is not set to auto, access to /dev/rtc is disabled