We have a hat with serial, mcp2515 and mcp3008 on a Pi 3B+ which hands on "Initializing entropy source hwrng"
Initially I thought it was bluetooth but disabling that does not solve the problem. If you disable mcp2515 in config.txt, it boot fine but obviously CAN in dysfunctional.
I really can't find any relation between hwrng and spi0.0, so I am a bit lost as to what is causing this.
If anyone has any suggestion or similar problem, your input would be appreciated.