https://github.com/friendlyarm/kernel-rockchip/
The following commits from the vendor dtsi file have been used:

ARM64: dts: rockchip: enable crypto node for nanopi5/6
Signed-off-by: jensen <[email protected]>

arm64: dts: rockchip: update ir-key-table for nanopi6
Signed-off-by: jensen <[email protected]>

ARM64: dts: rockchip: apply the EVB changes to nanopi5/6
Signed-off-by: jensen <[email protected]>

ARM64: dts: rockchip: enable watchdog for nanopi5/6
Signed-off-by: jensen <[email protected]>

Some documentation for the watchdog can be found here:
https://wiki.t-firefly.com/en/ROC-RK3588-PC/usage_watchdog.html

Watchdog and crypto has been successfully tested on CM3588.

Tested and working:

- all 4 NVMe port, including their respective activity LEDs (NVMe tested with hdparm)
- HDMI 4k@60 (tested with Gnome desktop), more will likely work too
- LAN
- 2xUSB3, 1xUSB2 (USB-C and OTG/DP mode untested)
- hardware buttons (power, reset)
- hardware acceleration for video encoding/decoding (tested with jellyfin-ffmpeg6)