Vonor got a reaction from 
TonyMac32 in  RockPi 4b 'board bring up'
							
						
					
				
				  
				
				
					
						Yeah I actually missed out that part. My bad.
	 
	However, that didn't work for me. After copying the files and rebooting I get this in dmesg.
	 
$ dmesg | grep -i sdio
[    2.424208] mmc0: new ultra high speed SDR104 SDIO card at address 0001
[    7.256738] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/9
[    7.300520] brcmfmac mmc0:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.txt failed with error -2
[    8.304313] brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50