Cannot obtain spidevX.Y on BananaPi M1+

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Hi, I am trying to use the SPI interface on the board GPIOs of a BananaPi M1+. I have started the latest version of Armbian available for this board (Armbian_19.11.6_Bananapi_bionic_current_5.4.8) and after the initial configuration the "/boot/armbianEnv.txt" file has the following added lines:

	overlays=spi-add-cs1 spi-spidev

I have rebooted but I am unable to use the spidevX.Y under the "/dev" folder. What am I missing? 

NOTE: I have tried several combinations of values on the armbianEnv.txt configuration file (ie: using only overlays flags without the other ones, using only the spi-spidev flag, etc...), none succeeded. 

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