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 13ARCH_PATH := arch/$(ARCH)/dts 14dtb_depends := arch-dtbs 15 16ifneq ($(EXT_DTB),) 17DTB := $(EXT_DTB) 18else 19DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb 20dtb_depends += $(DTB:.dtb=.dts) 21endif 22 23$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE 24 $(call if_changed,fdtgrep) 25 26$(obj)/dt.dtb: $(DTB) FORCE 27 $(call if_changed,shipped) 28 29targets += dt.dtb dt-spl.dtb 30 31$(DTB): $(dtb_depends) 32ifeq ($(EXT_DTB),) 33 $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@ 34endif 35 $(Q)test -e $@ || ( \ 36 echo >&2; \ 37 echo >&2 "Device Tree Source is not correctly specified."; \ 38 echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"; \ 39 echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument"; \ 40 echo >&2; \ 41 /bin/false) 42 43arch-dtbs: 44 $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs 45 46.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S 47 48 49ifeq ($(CONFIG_SPL_BUILD),y) 50obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o 51# support "out-of-tree" build for dtb-spl 52$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE 53 $(call if_changed_dep,as_o_S) 54else 55obj-$(CONFIG_OF_EMBED) := dt.dtb.o 56endif 57 58dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb 59 @: 60 61clean-files := dt.dtb.S dt-spl.dtb.S 62 63# Let clean descend into dts directories 64subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts 65