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_NAME).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE
20	mkdir -p $(dir $@)
21	$(call if_changed,fdtgrep)
22
23ifeq ($(CONFIG_OF_DTB_PROPS_REMOVE),y)
24$(obj)/dt.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
25	$(call if_changed,fdt_rm_props)
26else
27$(obj)/dt.dtb: $(DTB) FORCE
28	$(call if_changed,shipped)
29endif
30
31targets += dt.dtb
32
33$(DTB): arch-dtbs
34	$(Q)test -e $@ || (						\
35	echo >&2;							\
36	echo >&2 "Device Tree Source ($@) is not correctly specified.";	\
37	echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";		\
38	echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";	\
39	echo >&2;							\
40	/bin/false)
41
42PHONY += arch-dtbs
43arch-dtbs:
44	$(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs
45
46ifeq ($(CONFIG_SPL_BUILD),y)
47obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
48# support "out-of-tree" build for dtb-spl
49$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
50	$(call if_changed_dep,as_o_S)
51else
52obj-$(CONFIG_OF_EMBED) := dt.dtb.o
53endif
54
55# Target for U-Boot proper
56dtbs: $(obj)/dt.dtb
57	@:
58
59# Target for SPL/TPL
60spl_dtbs: $(obj)/dt-$(SPL_NAME).dtb
61	@:
62
63clean-files := dt.dtb.S
64
65# Let clean descend into dts directories
66subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts ../arch/powerpc/dts ../arch/riscv/dts
67