2 # Copyright (c) 2011 The Chromium OS Authors.
4 # SPDX-License-Identifier: GPL-2.0+
7 # This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is
8 # enabled. See doc/README.fdt-control for more details.
10 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
11 ifeq ($(DEVICE_TREE),)
12 DEVICE_TREE := notfound
15 DTS := $(srctree)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
17 DTC_FLAGS += -i $(srctree)/arch/$(ARCH)/dts -R 4 -p 0x1000
19 $(obj)/dt.dtb: $(DTS) FORCE
20 $(call if_changed_dep,dtc)
26 @echo >&2 "Device Tree Source is not specified."
27 @echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"
28 @echo >&2 "or build with 'DEVICE_TREE=<dts-file-name>' argument"
31 .SECONDARY: $(obj)/dt.dtb.S
33 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
38 clean-files := dt.dtb.S