you can patch the games to work without the clock. Apart from that I think the dingoo would need some kind of clock of it's own to use the clock function
The Dingoo has an RTC.
Gpsp has the possibility of emulating the internal battery as this worked on the psp. However the rtc in the dingoo resets itself every time the official firmware is booted.
This is true, unfortunately your only choice (yet) is to either patch the games, or run the games in Dingux with gpSP (which is crap).
Let's hope Dingoo Digital fix their clock drivers in native some time soon.