Hello Michael,
Unfortunately I am bit late to the party, but it seems that you have to specify fdtfile in armbianEnv.txt. The path needs to be amlogic/..., exactly like discovered in
Otherwise you won't be able to boot and need to edit the file with another linux/unix. Add this to your /boot/armbianEnv.txt
# Add to /boot/armbianEnv.txt
fdtfile=amlogic/meson-sm1-odroid-c4-spidev.dtb
overlays=spi0 spi-spidev spidev # TODO check which one is the right one ;)
#param_spidev_spi_bus=0 # Not needed at least for spidev0.x
Changing the status to "okay" in meson-sm1-odroid-c4.dtb does not do the trick, despite getting high hopes reading https://wiki.odroid.com/odroid-c4/application_note/gpio/spi#tab__odroid-c4.
Nevertheless it can't hurt to check the status in meson-sm1-odroid-c4-spidev.dtd:
fdtget /boot/dtb/amlogic/meson-sm1-odroid-c4-spidev.dtb /soc/bus@ffd00000/spi@15000 status
fdtget /boot/dtb/amlogic/meson-sm1-odroid-c4-spidev.dtb /soc/bus@ffd00000/spi@15000/spidev@0 status
Make sure to load the spidev kernel module at startup, i.e. by adding to /etc/modules
# Append /etc/modules
spidev
Note: I did a diff between both de-compiled dtb files, but haven't checked yet, if something else could be affected by using the spidev variant.
Hope this helps! I would highly appreciate it, if you could have a look into the overlays= / param_spidev_bus= and report your findings. Thanks in advance!
Best,
Daniel G.
