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