The previous "PCIe port" numbering was incorrect and resulted in several
PCIe devices failing to enumerate. With lane reversal, these numbers are
all backwards. This explains the confusing mapping of Clock Source #1 to
Root Port #9 in https://review.coreboot.org/c/coreboot/+/50101. We were
confusing "Root Port" vs "PCIe Lane".
This change addresses the port vs. lane confusion in the device tree
configurations. It also adds more detailed documentation to a future
reader (i.e., me) to avoid this blunder.
BUG=b:181633452,b:181635072,b:177752570
TEST=build AP firmware; flash device
BRANCH=none
Change-Id: I47edf0b0af1bdcf86b89f17ad2a1f128ef9e9f7a
Signed-off-by: Joe Tessler <jrt@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51678
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
549abfb5ab