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Kernel message - "PM: request_firmware failed"

Other Parts Discussed in Thread: AM3352

Hello,

I have a custom board based on AM3352 processor.

Linux starts fine, all peripherals appear to be working properly.

However on startup there's a kernel message that reads 

"PM: request_firmware failed"

It suggests it attempts loading some file but can't. Does anybody know what it is referring to and how it affects to functionality of the board?

Thank you.