New WiFi clm_blob file for CYW43455 (3B+, 4B and CM4)

[PhilE]

Cypress have given us an updated clm_blob file for CYW43455 WiFi chip. It should finally make 80MHz channels a reality and hopefully solve a number of connectivity problems in some regions.

A pre-release version of the file is available from here:

https://drive.google.com/file/d/1AN7lC_ ... sp=sharing

Once downloaded, copy it into /lib/firmware/brcm/ - you'll need to use "sudo cp ..." because of the permissions on that directory and file. You may also want to make a backup copy of the original:

Code: Select all

$ sudo mv /lib/firmware/brcm/brcmfmac43455-sdio.clm_blob{,.bak}
$ sudo cp brcmfmac43455-sdio.clm_blob /lib/firmware/brcm/

Reverting to the original is simply a case of:

Code: Select all

$ sudo mv /lib/firmware/brcm/brcmfmac43455-sdio.clm_blob{.bak,}

We'd welcome some feedback from those brave enough to give it a go. I wouldn't recommend doing so unless you have hands-on access (or at least an Ethernet ssh connection), but it's hard to imagine anyone's data being at risk.

[PhilE]

On the assumption that the complete lack of feedback is down to the fact that replies are disabled, there's a thread for comments here: viewtopic.php?f=36&t=291824