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serial_bcm283x_mu: Fail loading if not muxed
authorAlexander Graf <agraf@suse.de>
Thu, 25 Jan 2018 11:05:48 +0000 (12:05 +0100)
committerTom Rini <trini@konsulko.com>
Sun, 28 Jan 2018 17:27:34 +0000 (12:27 -0500)
The bcm283x mini-uart is only really usable as U-Boot serial output
when it is muxed to the UART pins of the RPi pin header.

So fail probing in case it is not muxed correctly, as in that case
firmware did not initialize it properly either.

Signed-off-by: Alexander Graf <agraf@suse.de>

No differences found
Cloned from git://git.denx.de/u-boot.git