coreboot-kgpe-d16/src/mainboard/siemens/mc_ehl
Mario Scheithauer b6940dfdae mb/siemens/mc_ehl4: Change GPIO GPP_B5 polarity for DRAM population
With the latest hardware revision, the polarity of GPP_B5 has been
changed. For a full-populated DRAM configuration, the input signal is
now connected to 3.3 V and for a half-populated configuration it is
connected to ground.

BUG=none
TEST=Use different populated mainboards and check coreboot log

GPP_B5 = 0:
[INFO ]  meminit_channels: DRAM half-populated
[DEBUG]  1 DIMMs found

GPP_B5 = 1:
[DEBUG]  2 DIMMs found

Change-Id: Iaa3a63fa52c802d8f5d8c6cc11dd6edfac117e88
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76434
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2023-07-13 10:42:53 +00:00
..
variants mb/siemens/mc_ehl4: Change GPIO GPP_B5 polarity for DRAM population 2023-07-13 10:42:53 +00:00
board_info.txt
bootblock.c
dsdt.asl
Kconfig mb/siemens/mc_ehl5: Add new board variant based on mc_ehl2 2023-05-12 15:01:24 +00:00
Kconfig.name mb/siemens/mc_ehl5: Add new board variant based on mc_ehl2 2023-05-12 15:01:24 +00:00
mainboard.c src/mainboard: Remove unnecessary space after casts 2023-01-30 22:11:50 +00:00
Makefile.inc mb/siemens/mc_ehl: Remove subdir 'spd' from Makefile 2023-05-04 13:41:25 +00:00
mc_ehl.fmd
romstage_fsp_params.c mb/siemens/mc_ehl: Make DRAM population configurable 2023-07-06 13:55:21 +00:00