dts-dirs += al

  dts-dirs += altera

  dts-dirs += amd

  dts-dirs += amlogic

  dts-dirs += apm
  dts-dirs += arm

  dts-dirs += broadcom

  dts-dirs += cavium

  dts-dirs += embedian

  dts-dirs += exynos

  dts-dirs += freescale

  dts-dirs += hisilicon

  dts-dirs += marvell

  dts-dirs += mediatek

  dts-dirs += nvidia

  dts-dirs += qcom

  dts-dirs += renesas

  dts-dirs += rockchip

  dts-dirs += socionext

  dts-dirs += sprd

  dts-dirs += xilinx

  dts-dirs += lg

  dts-dirs += zte

  subdir-y	:= $(dts-dirs)

  
  dtstree		:= $(srctree)/$(src)
  
  dtb-$(CONFIG_OF_ALL_DTBS) := $(patsubst $(dtstree)/%.dts,%.dtb, $(foreach d,$(dts-dirs), $(wildcard $(dtstree)/$(d)/*.dts)))
  
  always		:= $(dtb-y)