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-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE 26 $(call if_changed,fdtgrep) 27 28$(obj)/dt.dtb: $(DTB) FORCE 29 $(call if_changed,shipped) 30 31targets += dt.dtb dt-spl.dtb 32 33$(DTB): $(dtb_depends) 34ifeq ($(EXT_DTB),) 35 $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@ 36endif 37 $(Q)test -e $@ || ( \ 38 echo >&2; \ 39 echo >&2 "Device Tree Source is not correctly specified."; \ 40 echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"; \ 41 echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument"; \ 42 echo >&2; \ 43 /bin/false) 44 45arch-dtbs: 46 $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs 47 48.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S 49 50 51ifeq ($(CONFIG_SPL_BUILD),y) 52obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o 53# support "out-of-tree" build for dtb-spl 54$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE 55 $(call if_changed_dep,as_o_S) 56else 57obj-$(CONFIG_OF_EMBED) := dt.dtb.o 58endif 59 60dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb 61 @: 62 63clean-files := dt.dtb.S dt-spl.dtb.S 64 65# Let clean descend into dts directories 66subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts 67