Change in coreboot[master]: superio/aspeed/common: add workaround for serial routing delay quirk

[Michael Niewöhner (Code Review)]

Hello Kyösti Mälkki, Patrick Rudolph, Felix Held, Arthur Heymans, Jacob Garber, Matt DeVillier, build bot (Jenkins), Nico Huber, Martin Roth, Patrick Georgi,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/36591

to look at the new patch set (#7).

Change subject: superio/aspeed/common: add workaround for serial routing delay quirk
......................................................................

superio/aspeed/common: add workaround for serial routing delay quirk

Some mainboards with an ASPEED BMC do the serial routing setup in the
BMC boot phase on cold boot. This results in scrambled console output
when this is not finished fast enough.

This adds a delay of 500ms as workaround in the BMCs uart setup that
can be selected at mainboard level.

A user may disable the workaround when using another BMC firmware like
OpenBMC, u-bmc or some custom BMC bootloader with fast serial setup.

Change-Id: I7d6599b76384fc94a00a9cfc1794ebfe34863ff9
Signed-off-by: Michael Niewöhner 
---
M src/superio/aspeed/common/Kconfig
M src/superio/aspeed/common/early_serial.c
2 files changed, 21 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/91/36591/7