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 8 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%) 9 ifeq ($(DEVICE_TREE),) 10 DEVICE_TREE := unset 11 endif 12 13 ARCH_PATH := arch/$(ARCH)/dts 14 dtb_depends := arch-dtbs 15 16 ifneq ($(EXT_DTB),) 17 DTB := $(EXT_DTB) 18 else 19 DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb 20 dtb_depends += $(DTB:.dtb=.dts) 21 endif 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 29 targets += dt.dtb dt-spl.dtb 30 31 $(DTB): $(dtb_depends) 32 ifeq ($(EXT_DTB),) 33 $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@ 34 endif 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 43 arch-dtbs: 44 $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs 45 46 .SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S 47 48 49 ifeq ($(CONFIG_SPL_BUILD),y) 50 obj-$(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 $(call if_changed_dep,as_o_S) 54 else 55 obj-$(CONFIG_OF_EMBED) := dt.dtb.o 56 endif 57 58 dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb 59 @: 60 61 clean-files := dt.dtb.S dt-spl.dtb.S 62 63 # Let clean descend into dts directories 64 subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts 65
