[coreboot-gerrit] Change in coreboot[master]: mb/google/volteer: Implement variant_devtree_update for volteer sku's

[Shaunak Saha (Code Review)]

Hello Patrick Georgi, Martin Roth,

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

https://review.coreboot.org/c/coreboot/+/44261

to look at the new patch set (#3).

Change subject: mb/google/volteer: Implement variant_devtree_update for volteer sku's
......................................................................

mb/google/volteer: Implement variant_devtree_update for volteer sku's

HybridStorageMode FSP UPD needs to be set only for optane storage.
Enabling HybridStorageMode causes some extra delay in FspSiliconInit due
to HECI command and hence is avoided for NVMe and SATA scenerios. This
change disables "HybridStorageMode" by default from baseboard devicetree.
Any volteer variant which is using optane should enable "HybridStorageMode"
from the override devicetree file.This change also provides an implementation
of variant_devtree_update() for volteer that enables HybridStorageMode for
SKU ID = 3 and 5.

BUG=b:158573805
TEST=Verify HybridStorageMode is disabled when SKU ID != 3 or 5 and
enabled for those 2 sku's only.

Signed-off-by: Shaunak Saha 
Change-Id: I5c3bcfafe1710155bb47f706c3568dd9500c1975
---
M src/mainboard/google/volteer/Makefile.inc
A src/mainboard/google/volteer/ramstage.c
M src/mainboard/google/volteer/variants/baseboard/devicetree.cb
M src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h
M src/mainboard/google/volteer/variants/volteer/Makefile.inc
A src/mainboard/google/volteer/variants/volteer/variant.c
6 files changed, 39 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/61/44261/3