Mr_Blonde

You just have to replace the old file with your modified one.

You have to add spidev child node to the controller node
spi@01c05000 { compatible = "allwinner,sun4i-a10-spi"; reg = <0x1c05000 0x1000>; interrupts = <0x0 0xa 0x4>; clocks = <0x2 0x14 0x20>; clock-names = "ahb", "mod"; dmas = <0x1f 0x1 0x1b 0x1f 0x1 0x1a>; dma-names = "rx", "tx"; status = "okay"; #address-cells = <0x1>; #size-cells = <0x0>; pinctrl-names = "default"; pinctrl-0 = <0x21 0x22 0x23>; spidev@0 { compatible = "spidev"; status = "okay"; reg = <0>; /* Chip select 0 */ spi-max-frequency = <1000000>; }; }; In the future it will be solved with DT overlays, but for now it's not implemented on the stable images.

Device Tree modifications are currently required to enable SPIdev on stable Armbian images with mainline kernel.

The fact that you are seeing spidev in lsmod doesn't mean nothing wrong occured.
Check the kernel logs with "dmesg | grep spidev"