src/soc/amd/common/block/smbus/Makefile.mk - coreboot - Gitiles

 ## SPDX-License-Identifier: GPL-2.0-only
 ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_SMBUS),y)

 bootblock-y += smbus_early_fch.c
 romstage-y += smbus.c
 ramstage-y += smbus.c
 ramstage-y += sm.c

 endif # CONFIG_SOC_AMD_COMMON_BLOCK_SMBUS
	## SPDX-License-Identifier: GPL-2.0-only
	ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_SMBUS),y)

	bootblock-y += smbus_early_fch.c
	romstage-y += smbus.c
	ramstage-y += smbus.c
	ramstage-y += sm.c

	endif # CONFIG_SOC_AMD_COMMON_BLOCK_SMBUS