How to install latest mt7921au firmware on OpenWRT

[morrownr]

A section showing how to do it has been added to Main Menu item 8 (Mediatek Firmware) but I'll post it here as well.

How to Install mt7921au firmware files on OpenWRT

Note: As of OpenWRT 22.03.2, the mt7921au firmware is still included in the mt7921e driver file instead of a common package. Therefore, loading the mt7921u driver does not load the firmware. Yes, this is a bug.

Download firmware files to Linux PC

Go to the following site:

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/mediatek

Click on WIFI_MT7961_patch_mcu_1_2_hdr.bin

Click on plain

Save file

Click on WIFI_RAM_CODE_MT7961_1.bin

Click on plain

Save file

ssh to OpenWRT router (Putty or other) (make sure a non null password was previously set)

cd /lib/firmware

mkdir mediatek

On Linux PC:

$ scp WIFI_RAM_CODE_MT7961_1.bin root@192.168.1.1:/lib/firmware/mediatek
$ scp WIFI_MT7961_patch_mcu_1_2_hdr.bin root@192.168.1.1:/lib/firmware/mediatek