src/mainboard/google/brya/variants/baseboard/brya/Makefile.inc - mirrors/cros/chromiumos/third_party/coreboot - Git at Google

 bootblock-y += gpio.c

 romstage-y += memory.c
 romstage-y += gpio.c

 ramstage-y += gpio.c
 ramstage-y += ramstage.c
	bootblock-y += gpio.c

	romstage-y += memory.c
	romstage-y += gpio.c

	ramstage-y += gpio.c
	ramstage-y += ramstage.c