1# SPDX-License-Identifier: GPL-2.0+ 2# 3# Copyright (c) 2011 The Chromium OS Authors. 4 5# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is 6# enabled. See doc/README.fdt-control for more details. 7 8DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%) 9ifeq ($(DEVICE_TREE),) 10DEVICE_TREE := unset 11endif 12 13ifneq ($(EXT_DTB),) 14DTB := $(EXT_DTB) 15else 16DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb 17endif 18 19$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE 20 $(call if_changed,fdtgrep) 21 22$(obj)/dt.dtb: $(DTB) FORCE 23 $(call if_changed,shipped) 24 25targets += dt.dtb dt-spl.dtb 26 27$(DTB): arch-dtbs 28 $(Q)test -e $@ || ( \ 29 echo >&2; \ 30 echo >&2 "Device Tree Source is not correctly specified."; \ 31 echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"; \ 32 echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument"; \ 33 echo >&2; \ 34 /bin/false) 35 36PHONY += arch-dtbs 37arch-dtbs: 38 $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs 39 40ifeq ($(CONFIG_SPL_BUILD),y) 41obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o 42# support "out-of-tree" build for dtb-spl 43$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE 44 $(call if_changed_dep,as_o_S) 45else 46obj-$(CONFIG_OF_EMBED) := dt.dtb.o 47endif 48 49dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb 50 @: 51 52clean-files := dt.dtb.S dt-spl.dtb.S 53 54# Let clean descend into dts directories 55subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts ../arch/powerpc/dts ../arch/riscv/dts 56