The broadcom module (brcmfmac) is highly bugged in raspberry, i kicked it out.
I am using an USB wifi adapter with atheros chipset (ath9k_htc) right now, what solved all problems i was heaving with broadcom.
Exactly, i am not using PCF8523 RTC.DougieLawson wrote:That's the wrong module for a PCF8523 RTC.