[coreboot-gerrit] [L] Change in coreboot[main]: mb/lenovo: Add ThinkCentre M900 (Skylake/LGA 1151)

[Nicholas Chin (Code Review)]

Attention is currently required from: Alexander Couzens, Felix Singer, Jan Philipp Groß, Nicholas Chin, Paul Menzel.

Hello Alexander Couzens, Jan Philipp Groß, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/74187?usp=email

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

Change subject: mb/lenovo: Add ThinkCentre M900 (Skylake/LGA 1151)
......................................................................

mb/lenovo: Add ThinkCentre M900 (Skylake/LGA 1151)

The mainboard is marked IQ1X0MS, though it is also known as the MS-7988.
The Small Form Factor version was used for this port, though the Mini
Tower seems to use the exact same board. Other systems such as the
ThinkCentre M800, ThinkStation P310, ThinkStation P320, and IdeaCentre
700-25ISH appear to use the same PCB with different configurations of
components.
All the code in this port was originally copied from the Asrock H110M
and then modified to match the actual configuration of the M900. The VBT
was extracted using `intelvbttool -l -v data.vbt` while running version
FWKTBFA of the vendor firmware.

Working:
- Boots to Linux with SeaBIOS 1.16.3
- Boots to Linux with EDK2 (MrChromebox uefipayload_202408)
- Display Ports
- VGA port
- PCIe slots
- Console over serial port
- Front and rear USB 3.0 ports and internal USB2.0 headers
- Front and rear audio jacks
- Internal speaker
- SATA ports 1-4 (5 and 6 are not populated on the M900)
- Hardware monitoring via nct6683 kernel module
- Gigabit Ethernet
- S3 suspend/resume

Unknown/untested:
- M.2 E-key slot
- Parallel port header
- PS/2 Mouse/Keyboard via KB_MS1 header
- TPM

Change-Id: I4e70c9f42c19f130a00170b32ae74b61f0483a22
Signed-off-by: Nicholas Chin 
---
A src/mainboard/lenovo/m900/Kconfig
A src/mainboard/lenovo/m900/Kconfig.name
A src/mainboard/lenovo/m900/Makefile.mk
A src/mainboard/lenovo/m900/acpi/ec.asl
A src/mainboard/lenovo/m900/acpi/superio.asl
A src/mainboard/lenovo/m900/board_info.txt
A src/mainboard/lenovo/m900/bootblock.c
A src/mainboard/lenovo/m900/cmos.default
A src/mainboard/lenovo/m900/cmos.layout
A src/mainboard/lenovo/m900/data.vbt
A src/mainboard/lenovo/m900/devicetree.cb
A src/mainboard/lenovo/m900/dsdt.asl
A src/mainboard/lenovo/m900/gma-mainboard.ads
A src/mainboard/lenovo/m900/gpio.h
A src/mainboard/lenovo/m900/hda_verb.c
A src/mainboard/lenovo/m900/mainboard.c
A src/mainboard/lenovo/m900/ramstage.c
A src/mainboard/lenovo/m900/romstage.c
18 files changed, 751 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/87/74187/7