src/soc/intel/common/block/spi/Makefile.inc

ifeq ($(CONFIG_SOC_INTEL_COMMON_BLOCK_SPI),y)
bootblock-y += spi.c

verstage-y += spi.c

romstage-y += spi.c

ramstage-y += spi.c

postcar-y += spi.c

smm-$(CONFIG_SPI_FLASH_SMM) += spi.c
endif