How write fpga firmware with kernel version 4.18 / 4.19?


we use the kernel v4.15 and write the fpga firmware with the overlay devicetree,
this works great.
i want to try the new kernel version 4.18 but the folder
is missing.

have someone test 4.18 or 4.19 with devicetree (device-tree) overlay, and writing the fpga firmware?