volteer: allow empty SPD_SOURCES
Some Volteer variants might not use SPD files. Allow SPD_SOURCES in
spd/Makefile.inc to be empty.
BUG=None
BRANCH=None
TEST=Build coreboot and see that it builds without error
Signed-off-by: Paul Fagerburg <pfagerburg@google.com>
Change-Id: I5a8231b999e16503867d3c8df571b11fa0c1f6a6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38902
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/mainboard/google/volteer/spd/Makefile.inc b/src/mainboard/google/volteer/spd/Makefile.inc
index c4b9e99..9f0106b 100644
--- a/src/mainboard/google/volteer/spd/Makefile.inc
+++ b/src/mainboard/google/volteer/spd/Makefile.inc
@@ -6,13 +6,10 @@
## SPDX-License-Identifier: GPL-2.0-or-later
##
+ifneq ($(SPD_SOURCES),)
SPD_BIN = $(obj)/spd.bin
-ifeq ($(SPD_SOURCES),)
- SPD_DEPS := $(error SPD_SOURCES is not set. Variant must provide this)
-else
- SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
-endif
+SPD_DEPS := $(foreach f, $(SPD_SOURCES), src/mainboard/$(MAINBOARDDIR)/spd/$(f).spd.hex)
# Include spd ROM data
$(SPD_BIN): $(SPD_DEPS)
@@ -25,3 +22,4 @@
cbfs-files-y += spd.bin
spd.bin-file := $(SPD_BIN)
spd.bin-type := spd
+endif