1dts-dirs += amd 2dts-dirs += apm 3dts-dirs += arm 4dts-dirs += cavium 5dts-dirs += exynos 6dts-dirs += freescale 7dts-dirs += mediatek 8dts-dirs += sprd 9dts-dirs += xilinx 10 11subdir-y := $(dts-dirs) 12