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 += $(DTB:.dtb=.dts) 23endif 24 25# Pass the original device tree file through fdtgrep twice. The first pass 26# removes any unwanted nodes (i.e. those which don't have the 27# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second 28# pass removes various unused properties from the remaining nodes. 29# The output is typically a much smaller device tree file. 30ifeq ($(CONFIG_TPL_BUILD),y) 31fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl 32else 33fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl 34endif 35quiet_cmd_fdtgrep = FDTGREP $@ 36 cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \ 37 -n /chosen -n /config -O dtb | \ 38 $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \ 39 $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS))) 40 41$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE 42 $(call if_changed,fdtgrep) 43 44$(obj)/dt.dtb: $(DTB) FORCE 45 $(call if_changed,shipped) 46 47targets += dt.dtb dt-spl.dtb 48 49$(DTB): $(dtb_depends) 50ifeq ($(EXT_DTB),) 51 $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@ 52endif 53 $(Q)test -e $@ || ( \ 54 echo >&2; \ 55 echo >&2 "Device Tree Source is not correctly specified."; \ 56 echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"; \ 57 echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument"; \ 58 echo >&2; \ 59 /bin/false) 60 61arch-dtbs: 62 $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs 63 64.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S 65 66 67ifeq ($(CONFIG_SPL_BUILD),y) 68obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o 69# support "out-of-tree" build for dtb-spl 70$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE 71 $(call if_changed_dep,as_o_S) 72else 73obj-$(CONFIG_OF_EMBED) := dt.dtb.o 74endif 75 76dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb 77 @: 78 79clean-files := dt.dtb.S dt-spl.dtb.S 80 81# Let clean descend into dts directories 82subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts 83