Hardware clock and time zone issues

The Development Board needs to display the clock before long, but the default is UTC time, so increase the time zone file.

Copy the Shanghai time zone/usr/share/zoneinfo/asia/shanghai file for localtime to/etc
cp/usr/share/zoneinfo/asia/shanghai/etc/ LocalTime

However, when debugging the clock, it is found that when the time is set and written to the hardware, the boot is always 8 hours fast.

The survey found that writing to the hardware used hwclock-w, the default is to write local time, and when the kernel is in UTC to write time, just increased by 8 hours.

So speak hwclock-w change Hwclock-uw can work normally.

Hwclock:invalid option--y
BusyBox v1.15.2 (2009-10-26 18:24:41 CST) multi-call binary usage:hwclock

[-r|--show ] [-s|--hctosys] [-W|--SYSTOHC] [-l|--localtime] [-U|--UTC] [F-FILE]

Query and set hardware clock (RTC)

Options: -
        R      Show hardware clock time-
        s      set system time from hardware clock-
        w      set hardware clock to System TIME
 -u      hardware clock is in UTC
        -L hardware clock is in local time
        -F FILE use specified device (e.g./d EV/RTC2)

~end~