tree 0d6d20050e29cf25cf589d109143943dc3e2c01c
parent b34576b03bc9034843969505d6193ea22837e36c
author Mario Scheithauer <mario.scheithauer@siemens.com> 1687940309 +0200
committer Felix Held <felix-coreboot@felixheld.de> 1688388513 +0000

mb/siemens/mc_apl5: Correct the Tx signal from SATA port 0

Because of an incorrect transmit voltage swing, the signal must be
adjusted. The factor of slices for full swing level can be corrected via
the High Speed I/O Transmit Control Register 3. The appropriate value of
0.7 V was determined by using an oscilloscope.

Change-Id: I965960004ca44f1b37b16ce6484000fa7fd8ad90
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76175
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>