xref: /openbmc/u-boot/dts/Makefile (revision cac4d6a6) 
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 += $(DTB:.dtb=.dts)
23endif
24
25$(obj)/dt.dtb: $(DTB) FORCE
26	$(call if_changed,shipped)
27
28targets += dt.dtb
29
30$(DTB): $(dtb_depends)
31ifeq ($(EXT_DTB),)
32	$(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
33endif
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
42arch-dtbs:
43	$(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
44
45.SECONDARY: $(obj)/dt.dtb.S
46
47obj-$(CONFIG_OF_EMBED) := dt.dtb.o
48
49dtbs: $(obj)/dt.dtb
50	@:
51
52clean-files := dt.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
56