有谁遇到过RTC的这个问题，求解答！
root@dm816x:~# date
Fri Jan 1 22:27:52 UTC 2021
root@dm816x:~# hwclock
Wed Dec 31 23:59:59 1969 0.000000 seconds
root@dm816x:~# hwclock -w
root@dm816x:~# hwclock -s
hwclock: settimeofday() failed: Invalid argument
root@dm816x:~# hwclock
Wed Dec 31 23:59:59 1969 0.000000 seconds
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