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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 | ||
10 | DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%) | |
11 | ifeq ($(DEVICE_TREE),) | |
12 | DEVICE_TREE := unset | |
13 | endif | |
14 | ||
15 | ARCH_PATH := arch/$(ARCH)/dts | |
16 | dtb_depends := arch-dtbs | |
17 | ||
18 | ifneq ($(EXT_DTB),) | |
19 | DTB := $(EXT_DTB) | |
20 | else | |
21 | DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb | |
22 | dtb_depends += $(DTB:.dtb=.dts) | |
23 | endif | |
24 | ||
25 | $(obj)/dt.dtb: $(DTB) FORCE | |
26 | $(call if_changed,shipped) | |
27 | ||
28 | targets += dt.dtb | |
29 | ||
30 | $(DTB): $(dtb_depends) | |
31 | ifeq ($(EXT_DTB),) | |
32 | $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@ | |
33 | endif | |
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 | ||
42 | arch-dtbs: | |
43 | $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs | |
44 | ||
45 | .SECONDARY: $(obj)/dt.dtb.S | |
46 | ||
47 | obj-$(CONFIG_OF_EMBED) := dt.dtb.o | |
48 | ||
49 | dtbs: $(obj)/dt.dtb | |
50 | @: | |
51 | ||
52 | clean-files := dt.dtb.S | |
53 | ||
54 | # Let clean descend into dts directories | |
55 | subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts |