-SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS := $(addprefix $(obj),$(COBJS))
-SOBJS := $(addprefix $(obj),$(SOBJS))
+COBJS-$(CONFIG_CMD_ROMUPDATE) += flash.o
+
+SOBJS-y := lowlevel_init.o
+
+SRCS := $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS-y))
+SOBJS := $(addprefix $(obj),$(SOBJS-y))