dts/Makefile

   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
   8 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
   9 ifeq ($(DEVICE_TREE),)
  10 DEVICE_TREE := unset
  11 endif
  12
  13 ARCH_PATH := arch/$(ARCH)/dts
  14 dtb_depends := arch-dtbs
  15
  16 ifneq ($(EXT_DTB),)
  17 DTB := $(EXT_DTB)
  18 else
  19 DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb
  20 dtb_depends += $(DTB:.dtb=.dts)
  21 endif
  22
  23 $(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
  24         $(call if_changed,fdtgrep)
  25
  26 $(obj)/dt.dtb: $(DTB) FORCE
  27         $(call if_changed,shipped)
  28
  29 targets += dt.dtb dt-spl.dtb
  30
  31 $(DTB): $(dtb_depends)
  32 ifeq ($(EXT_DTB),)
  33         $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
  34 endif
  35         $(Q)test -e $@ || (                                             \
  36         echo >&2;                                                       \
  37         echo >&2 "Device Tree Source is not correctly specified.";      \
  38         echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";          \
  39         echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";  \
  40         echo >&2;                                                       \
  41         /bin/false)
  42
  43 arch-dtbs:
  44         $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
  45
  46 ifeq ($(CONFIG_SPL_BUILD),y)
  47 obj-$(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         $(call if_changed_dep,as_o_S)
  51 else
  52 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
  53 endif
  54
  55 dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
  56         @:
  57
  58 clean-files := dt.dtb.S dt-spl.dtb.S
  59
  60 # Let clean descend into dts directories
  61 subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts ../arch/powerpc/dts ../arch/riscv/dts