tree 5c87d2f2a63c40c2c62b601da185d9743db215b5
parent b9a7d779b3cb48bb784d0856b6bb5f3fc6b4c1f7
author Duncan Laurie <dlaurie@google.com> 1596065323 -0700
committer Furquan Shaikh <furquan@google.com> 1602285946 +0000

sconfig: Allow chipset to provide a base devicetree

This change extends the devicetree override one more layer and allows
the chipset to provide the base devicetree.  This allows the chipset to
assign alias names to devices as well as set default register values.
This works for both the baseboard devicetree.cb as well as variant
overridetree.cb.

chipset.cb:
device pci 15.0 alias i2c0 off end

devicetree.cb:
device ref i2c0 on end

BUG=b:156957424

Change-Id: Ia7500a62f6211243b519424ef3834b9e7615e2fd
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44037
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>