rpi: Determine PL011/Mini-UART availability at runtime

[u-boot] / dts / Makefile

diff --git a/dts/Makefile b/dts/Makefile
index c47fba787ccb593f11260b33d4c77b7bb135148c..c9b2a894418977ec32fd902739a6812a7e46e104 100644 (file)
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -9,30 +9,74 @@
 
 DEVICE_TREE ?= $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%)
 ifeq ($(DEVICE_TREE),)
-DEVICE_TREE := notfound
+DEVICE_TREE := unset
 endif
 
-DTS := $(srctree)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
+ARCH_PATH := arch/$(ARCH)/dts
+dtb_depends := arch-dtbs
 
-DTC_FLAGS += -i $(srctree)/arch/$(ARCH)/dts -R 4 -p 0x1000
+ifneq ($(EXT_DTB),)
+DTB := $(EXT_DTB)
+else
+DTB := $(ARCH_PATH)/$(DEVICE_TREE).dtb
+dtb_depends += $(DTB:.dtb=.dts)
+endif
+
+# Pass the original device tree file through fdtgrep twice. The first pass
+# removes any unwanted nodes (i.e. those which don't have the
+# 'u-boot,dm-pre-reloc' property and thus are not needed by SPL. The second
+# pass removes various unused properties from the remaining nodes.
+# The output is typically a much smaller device tree file.
+ifeq ($(CONFIG_TPL_BUILD),y)
+fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-tpl
+else
+fdtgrep_props := -b u-boot,dm-pre-reloc -b u-boot,dm-spl
+endif
+quiet_cmd_fdtgrep = FDTGREP $@
+      cmd_fdtgrep = $(objtree)/tools/fdtgrep $(fdtgrep_props) -RT $< \
+               -n /chosen -n /config -O dtb | \
+       $(objtree)/tools/fdtgrep -r -O dtb - -o $@ \
+               $(addprefix -P ,$(subst $\",,$(CONFIG_OF_SPL_REMOVE_PROPS)))
 
-$(obj)/dt.dtb: $(DTS) FORCE
-       $(call if_changed_dep,dtc)
+$(obj)/dt-spl.dtb: $(DTB) $(objtree)/tools/fdtgrep FORCE
+       $(call if_changed,fdtgrep)
 
-targets += dt.dtb
+$(obj)/dt.dtb: $(DTB) FORCE
+       $(call if_changed,shipped)
 
-$(DTS):
-       @echo >&2
-       @echo >&2 "Device Tree Source is not specified."
-       @echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'"
-       @echo >&2 "or build with 'DEVICE_TREE=<dts-file-name>' argument"
-       @/bin/false
+targets += dt.dtb dt-spl.dtb
+
+$(DTB): $(dtb_depends)
+ifeq ($(EXT_DTB),)
+       $(Q)$(MAKE) $(build)=$(ARCH_PATH) $@
+endif
+       $(Q)test -e $@ || (                                             \
+       echo >&2;                                                       \
+       echo >&2 "Device Tree Source is not correctly specified.";      \
+       echo >&2 "Please define 'CONFIG_DEFAULT_DEVICE_TREE'";          \
+       echo >&2 "or build with 'DEVICE_TREE=<device_tree>' argument";  \
+       echo >&2;                                                       \
+       /bin/false)
 
-.SECONDARY: $(obj)/dt.dtb.S
+arch-dtbs:
+       $(Q)$(MAKE) $(build)=$(ARCH_PATH) dtbs
 
+.SECONDARY: $(obj)/dt.dtb.S $(obj)/dt-spl.dtb.S
+
+
+ifeq ($(CONFIG_SPL_BUILD),y)
+obj-$(CONFIG_OF_EMBED) := dt-spl.dtb.o
+# support "out-of-tree" build for dtb-spl
+$(obj)/dt-spl.dtb.o: $(obj)/dt-spl.dtb.S FORCE
+       $(call if_changed_dep,as_o_S)
+else
 obj-$(CONFIG_OF_EMBED) := dt.dtb.o
+endif
 
-dtbs: $(obj)/dt.dtb
+dtbs: $(obj)/dt.dtb $(obj)/dt-spl.dtb
        @:
 
-clean-files := dt.dtb.S
+clean-files := dt.dtb.S dt-spl.dtb.S
+
+# Let clean descend into dts directories
+subdir- += ../arch/arm/dts ../arch/microblaze/dts ../arch/mips/dts ../arch/sandbox/dts ../arch/x86/dts