arch/mips/boot/dts/xilfpga/Makefile - SHIFTPHONES/mainline/linux - Gitiles

 dtb-$(CONFIG_XILFPGA_NEXYS4DDR)	+= nexys4ddr.dtb

 obj-y				+= $(patsubst %.dtb, %.dtb.o, $(dtb-y))

 # Force kbuild to make empty built-in.o if necessary
 obj-				+= dummy.o

 always				:= $(dtb-y)
	dtb-$(CONFIG_XILFPGA_NEXYS4DDR) += nexys4ddr.dtb

	obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))

	# Force kbuild to make empty built-in.o if necessary
	obj- += dummy.o

	always := $(dtb-y)