arch/riscv/boot/dts/Makefile - linux - Git at Google

 # SPDX-License-Identifier: GPL-2.0
 subdir-y += sifive
 subdir-y += starfive
 subdir-$(CONFIG_SOC_CANAAN_K210_DTB_BUILTIN) += canaan
 subdir-y += microchip

 obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))
	# SPDX-License-Identifier: GPL-2.0
	subdir-y += sifive
	subdir-y += starfive
	subdir-$(CONFIG_SOC_CANAAN_K210_DTB_BUILTIN) += canaan
	subdir-y += microchip

	obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))