4-Mic Array not recognized on latest Bookworm / Bullseye installs (Rpi4, kernel 6.1)

[tziegler-tud]

Hi there!

First of all: Thanks for putting in the work and keeping our hardware alive!

I am having trouble getting the 4-Mic Array working on recent version of raspberry pi OS with kernel version 6.1.0 on a Raspberry Pi 4.

I have tried the available Bookworm and Bullseye versions, both 32bit and 64bit LITE versions, all with the same result:

• Drivers installation proceeds seemingly correct (using the 6.1 branch)
• Both my 2-Mic Arrays are recognized correctly and work as expected
• The 4-Mic Array is not recognized (arecord -l is empty)
• SPI communication to the APA102 LEDs on the 4-Mic array works as expected

I suspected a faulty hardware, but the 4-Mic Array works correctly using your provided buster image with drivers pre-installed.

I'm sure I'm missing something here. Do you have any pointers to what's causing the trouble?
I'd like to give more detailed info to help troubleshooting. Please, let me know what additional output/ information might help.