I have installed DietPi(bookworm) on Odroid-C2 and after whole system update I was shocked.
Linux kernel is 6.1.11 from Feb 18 2023. For now the newest kernel is (source https://www.kernel.org/):
longterm: 6.1.36 2023-06-28
Linux DietPi 6.1.11-meson64 #23.02.2 SMP PREEMPT Sat Feb 18 00:07:55 UTC 2023 aarch64 GNU/Linux
Moreover this kernel is taken straight from Armbian and Armbian(Debian based) discontinued support for Odroid-C2.
So there will be no kernel updates in DietPi(for Odroid-C2) anymore?
We don’t do own kernel builds as it is out of our capacity (manpower) If there is no mainline or Armbian support, it could be challenging. Maybe @MichaIng could comment on this.
Linux 6.1 is the current LTS, so for production systems probably the best you can have. The patch version indeed is old, not sure why Armbian does not upload newer ones into their APT repository. It is the same for all their “current” kernel builds. The last update of the whole repository was in February 25th .
I read they did a more fundamental update to their package build/distribution system, and then there was the switch to Debian Bookworm, which probably leads to this APT repo update delay.
There are many SBCs without official support by Armbian. However, the kernel is shared among all SBCs of a SoC vendor, so the Odroid C2 receives kernel updates together with Odroid N2, C4, Radxa Zero, NanoPi K2 etc, all SBCs with Amlogic Meson 64-bit SoC.
The U-Boot build is more likely stalled, but it is only or minor relevancy, as long as it does boot.