[S] Change in coreboot[master]: mb/google/myst: Enable mp2 device

[Jon Murphy (Code Review)]

Attention is currently required from: Jason Nien, Martin Roth.

Jon Murphy has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/74277 )

Change subject: mb/google/myst: Enable mp2 device
......................................................................

mb/google/myst: Enable mp2 device

The mp2 PCI device is still present when no mp2 firmware is loaded. When
this device isn't explicitly enabled in the mainboard's devicetree, the
chipset devicetree default of the device being disabled is used. This
results in coreboot's resource allocator not allocating resources to
the device and since the bridge doesn't have enough MMIO space reserved,
the Linux kernel can't assign resources to it. Enable the mp2 device in
the mainboard's devicetree so that it gets its resources assigned by
coreboot.

BUG=b:277217097
TEST=builds

Change-Id: I21885c51ff08846b456675090946f381843ef5e6
Signed-off-by: Jon Murphy 
---
M src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
1 file changed, 23 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/77/74277/1

diff --git a/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb b/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
index f863197..b1cb8a1 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/skyrim/variants/baseboard/devicetree.cb
@@ -112,6 +112,7 @@
    		device ref gfx on end # Internal GPU (GFX)
    		device ref gfx_hda on end # Display HD Audio Controller (GFXAZ)
    		device ref crypto on end # Crypto Coprocessor
+			device ref mp2 on end # Sensor Fusion Hub (MP2)
    		device ref xhci_0 on # USB 3.1 (USB0)
    			chip drivers/usb/acpi
    				device ref xhci_0_root_hub on