[Buildroot] Location of external firmware

[Mats Jansson]

Hi,

I have an external firmware to be loaed by a driver. The normal way is
to put the firmware in /lib/firmware. But since it needs to
be loaded during boot and udev is not intitialised at that point I
have found out that I need to build it into the kernel.

I want to put this file in my buildroot-external-tree just like I do
with patches. Any idea on how to do it?
I have tried two different approaches.
1. Creating a patch, but then I get the error message that "git binary diffs are not
supported."
2. setting CONFIG_EXTRA_FIRMWARE_DIR to $(BR2_EXTERNAL)/firmware but I
get the error message "BR2_EXTERNAL: command does not exist"

Anyone have a good idea on how to solve this?

Best regards
Mats                          mailto:matsmanhav at tele2.se