src/drivers/crb/Makefile.inc - mirrors/cros/chromiumos/third_party/coreboot - Git at Google

 bootblock-$(CONFIG_CRB_TPM) += tis.c tpm.c
 verstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
 romstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
 ramstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
 postcar-$(CONFIG_CRB_TPM) += tis.c tpm.c
	bootblock-$(CONFIG_CRB_TPM) += tis.c tpm.c
	verstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
	romstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
	ramstage-$(CONFIG_CRB_TPM) += tis.c tpm.c
	postcar-$(CONFIG_CRB_TPM) += tis.c tpm.c