You can get the .txt file from this EFI variable: /sys/firmware/efi/efivars/nvram-74b00bd9-805a-4d61-b51f-43268123d113
as explained in the kernel documentation: https://wireless.wiki.kernel.org/en/users/Drivers/brcm80211#firmware_installation1 Problem is brcmfmac does not do that automatically :-( -- Pau Garcia i Quiles http://www.elpauer.org (Due to my workload, I may need 10 days to answer)
