xref: /openbmc/u-boot/dts/Makefile (revision b2e02d28) 
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
15ifneq ($(EXT_DTB),)
16DTB := $(EXT_DTB)
17else
18DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb
19endif
20
21$(obj)/dt.dtb: $(DTB) FORCE
22	$(call if_changed,shipped)
23
24targets += dt.dtb
25
26$(DTB): arch-dtbs
27	$(Q)test -e $@ || (						\
28	echo >&2;							\
29	echo >&2 "Device Tree Source is not correctly specified.";	\
30	echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";		\
31	echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";	\
32	echo >&2;							\
33	/bin/false)
34
35arch-dtbs:
36	$(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs
37
38.SECONDARY: $(obj)/dt.dtb.S
39
40obj-$(CONFIG_OF_EMBED) := dt.dtb.o
41
42dtbs: $(obj)/dt.dtb
43	@:
44
45clean-files := dt.dtb.S
46
47# Let clean descend into dts directories
48subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/sandbox/dts ../arch/x86/dts
49