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 += $(DTB:.dtb=.dts)
  23 endif
  24
  25 # Pass the original device tree file through fdtgrep twice. The first pass
  26 # removes any unwanted nodes (i.e. those which don't have the
  27 # 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
  28 # pass removes various unused properties from the remaining nodes.
  29 # The output is typically a much smaller device tree file.
  30 ifeq ($(CONFIG_TPL_BUILD),y)
  31 fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
  32 else
  33 fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
  34 endif
  35 quiet_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
  47 targets += dt.dtb dt-spl.dtb
  48
  49 $(DTB): $(dtb_depends)
  50 ifeq ($(EXT_DTB),)
  51         $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
  52 endif
  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
  61 arch-dtbs:
  62         $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
  63
  64 .SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S
  65
  66
  67 ifeq ($(CONFIG_SPL_BUILD),y)
  68 obj-$(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         $(call if_changed_dep,as_o_S)
  72 else
  73 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
  74 endif
  75
  76 dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
  77         @:
  78
  79 clean-files := dt.dtb.S dt-spl.dtb.S
  80
  81 # Let clean descend into dts directories
  82 subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts