xref: /openbmc/u-boot/dts/Makefile (revision cd1cc31f) 
1#
2# Copyright (c) 2011 The Chromium OS Authors.
3#
4# SPDX-License-Identifier:	GPL-2.0+
5#
6
7# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
8# enabled. See doc/README.fdt-control for more details.
9
10DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
11ifeq ($(DEVICE_TREE),)
12DEVICE_TREE := unset
13endif
14
15ARCH_PATH := arch/$(ARCH)/dts
16dtb_depends := arch-dtbs
17
18ifneq ($(EXT_DTB),)
19DTB := $(EXT_DTB)
20else
21DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb
22dtb_depends += $(DTB:.dtb=.dts)
23endif
24
25# Pass the original device tree file through fdtgrep twice. The first pass
26# removes any unwanted nodes (i.e. those which don't have the
27# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
28# pass removes various unused properties from the remaining nodes.
29# The output is typically a much smaller device tree file.
30ifeq ($(CONFIG_TPL_BUILD),y)
31fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
32else
33fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
34endif
35quiet_cmd_fdtgrep = FDTGREP $@
36      cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
37		-n /chosen -n /config -O dtb | \
38	$(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
39		$(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
40
41$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
42	$(call if_changed,fdtgrep)
43
44$(obj)/dt.dtb: $(DTB) FORCE
45	$(call if_changed,shipped)
46
47targets += dt.dtb dt-spl.dtb
48
49$(DTB): $(dtb_depends)
50ifeq ($(EXT_DTB),)
51	$(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
52endif
53	$(Q)test -e $@ || (						\
54	echo >&2;							\
55	echo >&2 "Device Tree Source is not correctly specified.";	\
56	echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";		\
57	echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";	\
58	echo >&2;							\
59	/bin/false)
60
61arch-dtbs:
62	$(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
63
64.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S
65
66
67ifeq ($(CONFIG_SPL_BUILD),y)
68obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
69# support "out-of-tree" build for dtb-spl
70$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
71	$(call if_changed_dep,as_o_S)
72else
73obj-$(CONFIG_OF_EMBED) := dt.dtb.o
74endif
75
76dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
77	@:
78
79clean-files := dt.dtb.S dt-spl.dtb.S
80
81# Let clean descend into dts directories
82subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts
83