variables that affect the behaviour of the hwclock boot
/etc/default/rcS file contains variable settings in
assignment is allowed per line. Comments (starting with
’#’) are also allowed.
variables can be set.
This is used to specify that
the hardware clock is incapable of storing years outside the
range of 1994-1999. Set to yes if the hardware is
broken or no if working correctly.
If the hardware clock is not
accessible, set to no, in which case hwclock will not
be run. Otherwise, set to yes.
Additional options for hwclock.
Unset by default. For example, this may be use to specify
the machine hardware clock type for Alphas.
The hardware clock device you
want to use. Defaults to rtc0. It should probably
match the CONFIG_RTC_HCTOSYS_DEVICE kernel config