[Bug 1912905] Re: Can't find WLAN device on RPI-CM4L with 20.10 armhf preinstall server image

[Dave Jones]

Due to a missing brcmfmac43455-sdio.raspberrypi,4-compute-module.txt
alias in linux-firmware-raspi2. The CM4's we'd encountered so far (and
which had been tested for WiFi compatibility were all requesting
brcmfmac43456-sdio.raspberrypi,4-compute-module.txt (note 43455 vs
43456) but it appears there's a couple of board revisions out there.
I'll add the necessary alias in linux-firmware-raspi2 for hirsute, then
we can see about SRU'ing this.

** Also affects: linux-firmware-raspi2 (Ubuntu Hirsute)
   Importance: Undecided
       Status: New

** Also affects: linux-raspi (Ubuntu Hirsute)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1912905

Title:
  Can't find WLAN device on RPI-CM4L with 20.10 armhf preinstall server
  image

Status in linux-firmware-raspi2 package in Ubuntu:
  New
Status in linux-raspi package in Ubuntu:
  New
Status in linux-firmware-raspi2 source package in Focal:
  New
Status in linux-raspi source package in Focal:
  Confirmed
Status in linux-firmware-raspi2 source package in Groovy:
  New
Status in linux-raspi source package in Groovy:
  Confirmed
Status in linux-firmware-raspi2 source package in Hirsute:
  New
Status in linux-raspi source package in Hirsute:
  New

Bug description:
  [Description]
  Can't find WLAN device on Raspberry Pi CM4L with 20.10 armhf preinstall server image.
  This only happens on armhf image.

  [Steps to reproduce]
  1. Flash image http://cdimage.ubuntu.com/ubuntu/releases/groovy/release/ubuntu-20.10-preinstalled-server-armhf+raspi.img.xz
  2. Boot into system
  5. Check wireless device using "ip a"

  [Expected result]
  Can't find WLAN device

  [Actual result]
  WLAN device works fine

  [Additional information]
  Hardware: RPI-CM4L
  Kernel Version: 5.8.0-1006-raspi, 5.8.0-1012-raspi, 5.8.0-1013-raspi

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