dts/Makefile

   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
  10 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
  11 ifeq ($(DEVICE_TREE),)
  12 DEVICE_TREE := unset
  13 endif
  14
  15 ARCH_PATH := arch/$(ARCH)/dts
  16 dtb_depends := arch-dtbs
  17
  18 ifneq ($(EXT_DTB),)
  19 DTB := $(EXT_DTB)
  20 else
  21 DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb
  22 dtb_depends += $(DTB:.dtb=.dts)
  23 endif
  24
  25 $(obj)/dt.dtb: $(DTB) FORCE
  26         $(call if_changed,shipped)
  27
  28 targets += dt.dtb
  29
  30 $(DTB): $(dtb_depends)
  31 ifeq ($(EXT_DTB),)
  32         $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
  33 endif
  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
  42 arch-dtbs:
  43         $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
  44
  45 .SECONDARY: $(obj)/dt.dtb.S
  46
  47 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
  48
  49 dtbs: $(obj)/dt.dtb
  50         @:
  51
  52 clean-files := dt.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