mb/google/butterfly: override SMBus subsystem ID
Necessary to allow coolstar's Windows touchpad driver for this board,
since the touchpad is attached to the SMBus. The VID/DID combo used is
not registered/doesn't conflict with any currently in use, and would
be difficult to change at this point since the Windows drivers have
already been signed.
TEST=build/boot Win11, Linux on butterfly/lumpy/parrot, verify
touchpad driver works properly.
Change-Id: I61912fd6db9eb4b8d202ab633b8c7ca5913e759f
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76742
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
diff --git a/src/mainboard/google/butterfly/devicetree.cb b/src/mainboard/google/butterfly/devicetree.cb
index 24d973e..5b3841a 100644
--- a/src/mainboard/google/butterfly/devicetree.cb
+++ b/src/mainboard/google/butterfly/devicetree.cb
@@ -79,7 +79,9 @@
end
end # LPC bridge
device ref sata1 on end # SATA Controller 1
- device ref smbus on end # SMBus
+ device ref smbus on
+ subsystemid 0x04B4 0x18D1
+ end # SMBus
device ref sata2 off end # SATA Controller 2
device ref thermal on end # Thermal
end