How to upload fpga firmware

[Sascha Hauer]

Hi,

I wonder what can be done with the mainline state of drivers/fpga/. The
entry to the framework seems to be fpga_mgr_load(). The only user of
this function is fpga_region_program_fpga(). This in turn is only called
in response of applying a device tree overlay. A device tree overlay is
applied with of_overlay_fdt_apply() which has no users in the Kernel.

My current task is to load a firmware to a FPGA. The code all seems to
be there in the Kernel, it only lacks a way to trigger it. I am not very
interested in device tree overlays since the FPGA appears as a PCI
device (although applying a dtbo could enable the PCIe controller device
tree node). Is there some mainline way to upload FPGA firmware? At the
moment we are using the attached patch to trigger loading the firmware
from userspace. Would something like this be acceptable for mainline?

Sascha

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