hwclock on Turris 1.x routers can not find RTC

busybox:

root@turris:~# hwclock
hwclock: can't open '/dev/misc/rtc': No such file or directory

util-linux:

root@turris:~# /usr/sbin/hwclock -r -v 
hwclock from util-linux 2.34
System Time: 1606814388.436183
Trying to open: /dev/rtc0
Trying to open: /dev/rtc
Trying to open: /dev/misc/rtc
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.

Reported on support #1173168 and reproduced on Turris 1.1, HBL.