The brain is a heavily cyclic graph. We're not there yet ;)
$ dmesg | grep brcmfmac
[ 26.488164] brcmfmac: F1 signature read @0x18000000=0x1541a9a6
[ 26.512759] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43430-sdio for chip BCM43430/1
[ 26.513315] usbcore: registered new interface driver brcmfmac
[ 26.539406] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43430-sdio.raspberrypi,model-zero-w.txt