Enable SPI device on OrangePi 4b (RK3399)

Emrius

Hi,
I'm trying to enable the SPI sysfs device. I downloaded the Ubuntu and Debian images from the downloads section of orangepi. I found several `/dev/i2c` devices but the `/dev/spi` device is not loaded per default. When I append `spi_rockchip` and `spidev` to `/etc/modules` to load them explicitly I find the following journalctl log:

1. Aug 15 10:32:31 orangepi4 systemd-modules-load[194]: Module 'spi_rockchip' is builtin
   
2. Aug 15 10:32:31 orangepi4 systemd-modules-load[194]: Module 'spidev' is builtin

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However, the according sysfs devices are still not added to `/dev/`. I also tried the available armbian image but that gave me a pain in the a**. It's very unstable and refused to reboot a couple of times on my OrangePi 4b.

Has anybody achieved to load the SPI device?
Regards

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