18 files changed, 44 insertions, 81 deletions
diff --git a/.gitignore b/.gitignore
index 771b860..43e957a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 *.patch
 *.bin
 *.cfgtmp
+*.dts.tmp
 
 # Build tree
 /build-*
diff --git a/Makefile b/Makefile
index 7206aba..d545d30 100644
--- a/Makefile
+++ b/Makefile
@@ -413,7 +413,7 @@ endif
 
 all:		$(ALL-y) $(SUBDIR_EXAMPLES)
 
-$(obj)u-boot.dtb:	$(obj)u-boot
+$(obj)u-boot.dtb:	checkdtc $(obj)u-boot
 		$(MAKE) -C dts binary
 		mv $(obj)dts/dt.dtb $@
 
@@ -667,6 +667,12 @@ checkgcc4:
 		false; \
 	fi
 
+checkdtc:
+	@if test $(call dtc-version) -lt 0104; then \
+		echo '*** Your dtc is too old, please upgrade to dtc 1.4 or newer'; \
+		false; \
+	fi
+
 #
 # Auto-generate the autoconf.mk file (which is included by all makefiles)
 #
diff --git a/arch/arm/cpu/armv7/tegra114/config.mk b/arch/arm/cpu/armv7/tegra114/config.mk
deleted file mode 100644
index cb1a19d..0000000
--- a/arch/arm/cpu/armv7/tegra114/config.mk
+++ /dev/null
@@ -1,19 +0,0 @@
-#
-# Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
-#
-# (C) Copyright 2002
-# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
-#
-# This program is free software; you can redistribute it and/or modify it
-# under the terms and conditions of the GNU General Public License,
-# version 2, as published by the Free Software Foundation.
-#
-# This program is distributed in the hope it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-# more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-CONFIG_ARCH_DEVICE_TREE := tegra114
diff --git a/arch/arm/cpu/armv7/tegra20/config.mk b/arch/arm/cpu/armv7/tegra20/config.mk
deleted file mode 100644
index 3cac79b..0000000
--- a/arch/arm/cpu/armv7/tegra20/config.mk
+++ /dev/null
@@ -1,10 +0,0 @@
-#
-# (C) Copyright 2010,2011
-# NVIDIA Corporation <www.nvidia.com>
-#
-# (C) Copyright 2002
-# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-CONFIG_ARCH_DEVICE_TREE := tegra20
diff --git a/arch/arm/cpu/armv7/tegra30/config.mk b/arch/arm/cpu/armv7/tegra30/config.mk
deleted file mode 100644
index 719ca81..0000000
--- a/arch/arm/cpu/armv7/tegra30/config.mk
+++ /dev/null
@@ -1,19 +0,0 @@
-#
-# Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
-#
-# (C) Copyright 2002
-# Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
-#
-# This program is free software; you can redistribute it and/or modify it
-# under the terms and conditions of the GNU General Public License,
-# version 2, as published by the Free Software Foundation.
-#
-# This program is distributed in the hope it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-# more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-CONFIG_ARCH_DEVICE_TREE := tegra30
diff --git a/arch/microblaze/config.mk b/arch/microblaze/config.mk
index 6692f24..fc545a9 100644
--- a/arch/microblaze/config.mk
+++ b/arch/microblaze/config.mk
@@ -15,5 +15,3 @@ CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000
 PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__
 
 LDSCRIPT ?= $(SRCTREE)/$(CPUDIR)/u-boot.lds
-
-CONFIG_ARCH_DEVICE_TREE := microblaze
diff --git a/arch/x86/cpu/coreboot/config.mk b/arch/x86/cpu/coreboot/config.mk
deleted file mode 100644
index 0bbd2ff..0000000
--- a/arch/x86/cpu/coreboot/config.mk
+++ /dev/null
@@ -1,7 +0,0 @@
-#
-# Copyright (c) 2012 The Chromium OS Authors.
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-CONFIG_ARCH_DEVICE_TREE := coreboot
diff --git a/board/chromebook-x86/dts/link.dts b/board/chromebook-x86/dts/link.dts
index d0738cb..c95ee8a 100644
--- a/board/chromebook-x86/dts/link.dts
+++ b/board/chromebook-x86/dts/link.dts
@@ -1,6 +1,6 @@
 /dts-v1/;
 
-/include/ ARCH_CPU_DTS
+/include/ "coreboot.dtsi"
 
 / {
         #address-cells = <1>;
diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts
index 80ffe30..1e94c7f 100644
--- a/board/samsung/dts/exynos5250-smdk5250.dts
+++ b/board/samsung/dts/exynos5250-smdk5250.dts
@@ -10,7 +10,7 @@
 */
 
 /dts-v1/;
-/include/ ARCH_CPU_DTS
+/include/ "exynos5250.dtsi"
 
 / {
 	model = "SAMSUNG SMDK5250 board based on EXYNOS5250";
diff --git a/board/samsung/dts/exynos5250-snow.dts b/board/samsung/dts/exynos5250-snow.dts
index dca3386..7832e4e 100644
--- a/board/samsung/dts/exynos5250-snow.dts
+++ b/board/samsung/dts/exynos5250-snow.dts
@@ -10,7 +10,7 @@
 */
 
 /dts-v1/;
-/include/ ARCH_CPU_DTS
+/include/ "exynos5250.dtsi"
 
 / {
 	model = "Google Snow";
diff --git a/board/xilinx/microblaze-generic/dts/microblaze.dts b/board/xilinx/dts/microblaze-generic.dts
index 2033309..2033309 100644
--- a/board/xilinx/microblaze-generic/dts/microblaze.dts
+++ b/board/xilinx/dts/microblaze-generic.dts
diff --git a/board/xilinx/dts/microblaze.dts b/board/xilinx/dts/microblaze.dts
deleted file mode 100644
index bf984b0..0000000
--- a/board/xilinx/dts/microblaze.dts
+++ /dev/null
@@ -1 +0,0 @@
-/include/ BOARD_DTS
diff --git a/config.mk b/config.mk
index 499eed1..3e84f36 100644
--- a/config.mk
+++ b/config.mk
@@ -119,6 +119,7 @@ endif
 # Usage gcc-ver := $(call cc-version)
 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
+dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC))
 
 #
 # Include the make variables (CC, etc...)
diff --git a/doc/README.fdt-control b/doc/README.fdt-control
index 4b29060..86bae68 100644
--- a/doc/README.fdt-control
+++ b/doc/README.fdt-control
@@ -119,8 +119,7 @@ file into
 	board/<vendor>/dts/<name>.dts
 
 This should include your CPU or SOC's device tree file, placed in
-arch/<arch>/dts, and then make any adjustments required. The name of this
-is CONFIG_ARCH_DEVICE_TREE.dts.
+arch/<arch>/dts, and then make any adjustments required.
 
 If CONFIG_OF_EMBED is defined, then it will be picked up and built into
 the U-Boot image (including u-boot.bin).
diff --git a/dts/Makefile b/dts/Makefile
index 35303f7..3cf991e 100644
--- a/dts/Makefile
+++ b/dts/Makefile
@@ -17,15 +17,15 @@ $(error Please define CONFIG_DEFAULT_DEVICE_TREE in your board header file))
 DEVICE_TREE = $(subst ",,$(CONFIG_DEFAULT_DEVICE_TREE))
 endif
 
-$(if $(CONFIG_ARCH_DEVICE_TREE),,\
-$(error Your architecture does not have device tree support enabled. \
-Please define CONFIG_ARCH_DEVICE_TREE))
+DTS_INCDIRS =  $(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts
+DTS_INCDIRS += $(SRCTREE)/board/$(VENDOR)/dts
+DTS_INCDIRS += $(SRCTREE)/arch/$(ARCH)/dts
 
-# We preprocess the device tree file provide a useful define
-DTS_CPPFLAGS := -x assembler-with-cpp \
-		-DARCH_CPU_DTS=\"$(SRCTREE)/arch/$(ARCH)/dts/$(CONFIG_ARCH_DEVICE_TREE).dtsi\" \
-		-DBOARD_DTS=\"$(SRCTREE)/board/$(VENDOR)/$(BOARD)/dts/$(DEVICE_TREE).dts\" \
-		-I$(SRCTREE)/board/$(VENDOR)/dts -I$(SRCTREE)/arch/$(ARCH)/dts
+DTS_CPPFLAGS := -x assembler-with-cpp -undef -D__DTS__ \
+		-nostdinc $(addprefix -I,$(DTS_INCDIRS))
+
+DTC_FLAGS := -R 4 -p 0x1000 \
+	$(addprefix -i ,$(DTS_INCDIRS))
 
 all:	$(obj).depend $(LIB)
 
@@ -35,13 +35,8 @@ all:	$(obj).depend $(LIB)
 DT_BIN	:= $(obj)dt.dtb
 
 $(DT_BIN): $(TOPDIR)/board/$(VENDOR)/dts/$(DEVICE_TREE).dts
-	rc=$$( \
-		cat $< | $(CPP) -P $(DTS_CPPFLAGS) - | \
-		{ { $(DTC) -R 4 -p 0x1000 -O dtb -o ${DT_BIN} - 2>&1 ; \
-		    echo $$? >&3 ; } | \
-		  grep -v '^DTC: dts->dtb  on file' ; \
-	        } 3>&1 1>&2 ) ; \
-	exit $$rc
+	$(CPP) $(DTS_CPPFLAGS) $< -o $(DT_BIN).dts.tmp
+	$(DTC) $(DTC_FLAGS) -O dtb -o ${DT_BIN} $(DT_BIN).dts.tmp
 
 process_lds = \
 	$(1) | sed -r -n 's/^OUTPUT_$(2)[ ("]*([^")]*).*/\1/p'
diff --git a/include/configs/exynos5250-dt.h b/include/configs/exynos5250-dt.h
index 2ce5a78..8f8f85f 100644
--- a/include/configs/exynos5250-dt.h
+++ b/include/configs/exynos5250-dt.h
@@ -23,7 +23,6 @@
 #define CONFIG_DISPLAY_BOARDINFO
 
 /* Enable fdt support for Exynos5250 */
-#define CONFIG_ARCH_DEVICE_TREE		exynos5250
 #define CONFIG_OF_CONTROL
 #define CONFIG_OF_SEPARATE
 
diff --git a/include/configs/microblaze-generic.h b/include/configs/microblaze-generic.h
index 87f3d13..0e3de77 100644
--- a/include/configs/microblaze-generic.h
+++ b/include/configs/microblaze-generic.h
@@ -18,7 +18,7 @@
 /* Open Firmware DTS */
 #define CONFIG_OF_CONTROL	1
 #define CONFIG_OF_EMBED		1
-#define CONFIG_DEFAULT_DEVICE_TREE microblaze
+#define CONFIG_DEFAULT_DEVICE_TREE microblaze-generic
 
 /* linear and spi flash memory */
 #ifdef XILINX_FLASH_START
diff --git a/tools/dtc-version.sh b/tools/dtc-version.sh
new file mode 100755
index 0000000..e8c94d3
--- /dev/null
+++ b/tools/dtc-version.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+#
+# dtc-version dtc-command
+#
+# Prints the dtc version of `dtc-command' in a canonical 4-digit form
+# such as `0222' for binutils 2.22
+#
+
+dtc="$*"
+
+if [ ${#dtc} -eq 0 ]; then
+	echo "Error: No dtc command specified."
+	printf "Usage:\n\t$0 <dtc-command>\n"
+	exit 1
+fi
+
+MAJOR=$($dtc -v | head -1 | awk '{print $NF}' | cut -d . -f 1)
+MINOR=$($dtc -v | head -1 | awk '{print $NF}' | cut -d . -f 2)
+
+printf "%02d%02d\\n" $MAJOR $MINOR