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 ifneq ($(EXT_DTB),)
  14 DTB := $(EXT_DTB)
  15 else
  16 DTB := arch/$(ARCH)/dts/$(DEVICE_TREE).dtb
  17 endif
  18
  19 $(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
  20         $(call if_changed,fdtgrep)
  21
  22 $(obj)/dt.dtb: $(DTB) FORCE
  23         $(call if_changed,shipped)
  24
  25 targets += dt.dtb dt-spl.dtb
  26
  27 $(DTB): arch-dtbs
  28         $(Q)test -e $@ || (                                             \
  29         echo >&2;                                                       \
  30         echo >&2 "Device Tree Source is not correctly specified.";      \
  31         echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";          \
  32         echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";  \
  33         echo >&2;                                                       \
  34         /bin/false)
  35
  36 PHONY += arch-dtbs
  37 arch-dtbs:
  38         $(Q)$(MAKE) $(build)=arch/$(ARCH)/dts dtbs
  39
  40 ifeq ($(CONFIG_SPL_BUILD),y)
  41 obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
  42 # support "out-of-tree" build for dtb-spl
  43 $(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
  44         $(call if_changed_dep,as_o_S)
  45 else
  46 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
  47 endif
  48
  49 dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
  50         @:
  51
  52 clean-files := dt.dtb.S dt-spl.dtb.S
  53
  54 # Let clean descend into dts directories
  55 subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts ../arch/powerpc/dts ../arch/riscv/dts