maka

I see , you have inherited wrong nodes from your github downloaded file that are not present in firefly or box-demo dtbs. Maybe you have to use these ones as reference.

I think it will work if you have firmware and loads. Maybe that refuses. dmesg | grep -i error '

Delete this: wifi@1 { compatible = "brcm,bcm4329-fmac"; reg = < 0x01 >; interrupt-parent = < 0x63 >; interrupts = < 0x0a 0x04 >; interrupt-names = "host-wake"; pinctrl-names = "default"; pinctrl-0 = < 0x64 >; phandle = < 0xf8 >; };

Maybe there is already a DTB in GitHub.

How many usb do you have?

You don't have to chainload, rk3566 is fully supported in mainline. You need a mainlined dts.

With ddr4 the best is 1506mhz

Yes, DMC is deprecated.

I quess this is an android boot so the kernel is 4.19 and ddr frequency is stored in DTB file. So don't care about freq. With kernel 5.x the frequency is given by the bootloader and then you must pay atention.

So you want to link your box to the printer with ethernet and give the printer wifi? This is easy with a wifi-repeater-bridge but you want your box to do that. If you can give the printer an static IP and gateway I think you can do. Just asiggn static IPs to all the adapters within your router's IP. For exemple: Router IP 192.168.1.1 Printer IP 192.168.1.50 Printer Gateway 192.168.1.52 Box IP 192.168.1.51 Box Gateway 192.168.1.52 Wifi IP 192.168.1.52 Also you can bridge adapters like this https://www.baeldung.com/linux/bridging-network-interfaces