1# SPDX-License-Identifier: GPL-2.0+ 2# 3# Copyright (c) 2011 The Chromium OS Authors. 4 5# This Makefile builds the internal U-Boot fdt if CONFIG_OF_CONTROL is 6# enabled. See doc/README.fdt-control for more details. 7 8DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%) 9ifeq ($(DEVICE_TREE),) 10DEVICE_TREE := unset 11endif 12 13ifneq ($(EXT_DTB),) 14DTB := $(EXT_DTB) 15else 16DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb 17endif 18 19$(obj)/dt-$(SPL_NAME).dtb: dts/dt.dtb $(objtree)/tools/fdtgrep FORCE 20 mkdir -p $(dir $@) 21 $(call if_changed,fdtgrep) 22 23ifeq ($(CONFIG_OF_DTB_PROPS_REMOVE),y) 24$(obj)/dt.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE 25 $(call if_changed,fdt_rm_props) 26else 27$(obj)/dt.dtb: $(DTB) FORCE 28 $(call if_changed,shipped) 29endif 30 31targets += dt.dtb 32 33$(DTB): arch-dtbs 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 42PHONY += arch-dtbs 43arch-dtbs: 44 $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs 45 46ifeq ($(CONFIG_SPL_BUILD),y) 47obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o 48# support "out-of-tree" build for dtb-spl 49$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE 50 $(call if_changed_dep,as_o_S) 51else 52obj-$(CONFIG_OF_EMBED) := dt.dtb.o 53endif 54 55# Target for U-Boot proper 56dtbs: $(obj)/dt.dtb 57 @: 58 59# Target for SPL/TPL 60spl_dtbs: $(obj)/dt-$(SPL_NAME).dtb 61 @: 62 63clean-files := dt.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 ../arch/powerpc/dts ../arch/riscv/dts 67