I have an issue with the bcm4343w bluetooth side not being recognised. Commands such as hciconfig show no devices. The WIFI works fine. I have three builds all show no bluetooth devices, two builds are from the documentation that comes with the board, the Yocto build has had the BCMDHD-L4.1.15_1.2.0 package included in it. The third build was kernel given to me by Pierre-Jean which had the WIFI built in. Could this be a .dtb issue?
( I have the same issue on an imx7dsabresd board. On this board an external BT dongle can be detected but not the bcm4339 ).