Merge branch 'dt/dtbo-rename' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux into soc/dt

* 'dt/dtbo-rename' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  kbuild: Cleanup DT Overlay intermediate files as appropriate
  staging: pi433: overlay: Rename overlay source file from .dts to .dtso
  of: overlay: rename overlay source files from .dts to .dtso
  kbuild: Allow DTB overlays to built into .dtbo.S files
  kbuild: Allow DTB overlays to built from .dtso named source files

Link: https://lore.kernel.org/r/20221118211103.GA1334449-robh@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

41 files changed, 88 insertions, 62 deletions

diff --git a/.gitignore b/.gitignore
index 5da004814678..3ec73ead6757 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@
 *.dtb
 *.dtbo
 *.dtb.S
+*.dtbo.S
 *.dwo
 *.elf
 *.gcno
diff --git a/Makefile b/Makefile
index d148a55bfd0f..d51fd7770603 100644
--- a/Makefile
+++ b/Makefile
@@ -2001,7 +2001,9 @@ clean: $(clean-dirs)
 	@find $(or $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
 		\( -name '*.[aios]' -o -name '*.rsi' -o -name '*.ko' -o -name '.*.cmd' \
 		-o -name '*.ko.*' \
-		-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
+		-o -name '*.dtb' -o -name '*.dtbo' \
+		-o -name '*.dtb.S' -o -name '*.dtbo.S' \
+		-o -name '*.dt.yaml' \
 		-o -name '*.dwo' -o -name '*.lst' \
 		-o -name '*.su' -o -name '*.mod' -o -name '*.usyms' \
 		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile
index d072f3ba3971..ea5f4da68e23 100644
--- a/drivers/of/unittest-data/Makefile
+++ b/drivers/of/unittest-data/Makefile
@@ -1,38 +1,38 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-y += testcases.dtb.o
+obj-y += testcases.dtbo.o
 
-obj-$(CONFIG_OF_OVERLAY) += overlay.dtb.o \
-			    overlay_0.dtb.o \
-			    overlay_1.dtb.o \
-			    overlay_2.dtb.o \
-			    overlay_3.dtb.o \
-			    overlay_4.dtb.o \
-			    overlay_5.dtb.o \
-			    overlay_6.dtb.o \
-			    overlay_7.dtb.o \
-			    overlay_8.dtb.o \
-			    overlay_9.dtb.o \
-			    overlay_10.dtb.o \
-			    overlay_11.dtb.o \
-			    overlay_12.dtb.o \
-			    overlay_13.dtb.o \
-			    overlay_15.dtb.o \
-			    overlay_16.dtb.o \
-			    overlay_17.dtb.o \
-			    overlay_18.dtb.o \
-			    overlay_19.dtb.o \
-			    overlay_20.dtb.o \
-			    overlay_bad_add_dup_node.dtb.o \
-			    overlay_bad_add_dup_prop.dtb.o \
-			    overlay_bad_phandle.dtb.o \
-			    overlay_bad_symbol.dtb.o \
-			    overlay_base.dtb.o \
-			    overlay_gpio_01.dtb.o \
-			    overlay_gpio_02a.dtb.o \
-			    overlay_gpio_02b.dtb.o \
-			    overlay_gpio_03.dtb.o \
-			    overlay_gpio_04a.dtb.o \
-			    overlay_gpio_04b.dtb.o
+obj-$(CONFIG_OF_OVERLAY) += overlay.dtbo.o \
+			    overlay_0.dtbo.o \
+			    overlay_1.dtbo.o \
+			    overlay_2.dtbo.o \
+			    overlay_3.dtbo.o \
+			    overlay_4.dtbo.o \
+			    overlay_5.dtbo.o \
+			    overlay_6.dtbo.o \
+			    overlay_7.dtbo.o \
+			    overlay_8.dtbo.o \
+			    overlay_9.dtbo.o \
+			    overlay_10.dtbo.o \
+			    overlay_11.dtbo.o \
+			    overlay_12.dtbo.o \
+			    overlay_13.dtbo.o \
+			    overlay_15.dtbo.o \
+			    overlay_16.dtbo.o \
+			    overlay_17.dtbo.o \
+			    overlay_18.dtbo.o \
+			    overlay_19.dtbo.o \
+			    overlay_20.dtbo.o \
+			    overlay_bad_add_dup_node.dtbo.o \
+			    overlay_bad_add_dup_prop.dtbo.o \
+			    overlay_bad_phandle.dtbo.o \
+			    overlay_bad_symbol.dtbo.o \
+			    overlay_base.dtbo.o \
+			    overlay_gpio_01.dtbo.o \
+			    overlay_gpio_02a.dtbo.o \
+			    overlay_gpio_02b.dtbo.o \
+			    overlay_gpio_03.dtbo.o \
+			    overlay_gpio_04a.dtbo.o \
+			    overlay_gpio_04b.dtbo.o
 
 # enable creation of __symbols__ node
 DTC_FLAGS_overlay += -@
diff --git a/drivers/of/unittest-data/overlay.dts b/drivers/of/unittest-data/overlay.dtso
index 3bbc59e922fe..3bbc59e922fe 100644
--- a/drivers/of/unittest-data/overlay.dts
+++ b/drivers/of/unittest-data/overlay.dtso
diff --git a/drivers/of/unittest-data/overlay_0.dts b/drivers/of/unittest-data/overlay_0.dtso
index ac0f9e0fe65f..ac0f9e0fe65f 100644
--- a/drivers/of/unittest-data/overlay_0.dts
+++ b/drivers/of/unittest-data/overlay_0.dtso
diff --git a/drivers/of/unittest-data/overlay_1.dts b/drivers/of/unittest-data/overlay_1.dtso
index e92a626e2948..e92a626e2948 100644
--- a/drivers/of/unittest-data/overlay_1.dts
+++ b/drivers/of/unittest-data/overlay_1.dtso
diff --git a/drivers/of/unittest-data/overlay_10.dts b/drivers/of/unittest-data/overlay_10.dtso
index 73993bf23bf8..73993bf23bf8 100644
--- a/drivers/of/unittest-data/overlay_10.dts
+++ b/drivers/of/unittest-data/overlay_10.dtso
diff --git a/drivers/of/unittest-data/overlay_11.dts b/drivers/of/unittest-data/overlay_11.dtso
index 9a79b253a809..9a79b253a809 100644
--- a/drivers/of/unittest-data/overlay_11.dts
+++ b/drivers/of/unittest-data/overlay_11.dtso
diff --git a/drivers/of/unittest-data/overlay_12.dts b/drivers/of/unittest-data/overlay_12.dtso
index ca3441e2cbec..ca3441e2cbec 100644
--- a/drivers/of/unittest-data/overlay_12.dts
+++ b/drivers/of/unittest-data/overlay_12.dtso
diff --git a/drivers/of/unittest-data/overlay_13.dts b/drivers/of/unittest-data/overlay_13.dtso
index 3c30dec63894..3c30dec63894 100644
--- a/drivers/of/unittest-data/overlay_13.dts
+++ b/drivers/of/unittest-data/overlay_13.dtso
diff --git a/drivers/of/unittest-data/overlay_15.dts b/drivers/of/unittest-data/overlay_15.dtso
index 5728490474f6..5728490474f6 100644
--- a/drivers/of/unittest-data/overlay_15.dts
+++ b/drivers/of/unittest-data/overlay_15.dtso
diff --git a/drivers/of/unittest-data/overlay_16.dts b/drivers/of/unittest-data/overlay_16.dtso
index 80a46dc02581..80a46dc02581 100644
--- a/drivers/of/unittest-data/overlay_16.dts
+++ b/drivers/of/unittest-data/overlay_16.dtso
diff --git a/drivers/of/unittest-data/overlay_17.dts b/drivers/of/unittest-data/overlay_17.dtso
index 5b8a2209177f..5b8a2209177f 100644
--- a/drivers/of/unittest-data/overlay_17.dts
+++ b/drivers/of/unittest-data/overlay_17.dtso
diff --git a/drivers/of/unittest-data/overlay_18.dts b/drivers/of/unittest-data/overlay_18.dtso
index dcddd5f6d301..dcddd5f6d301 100644
--- a/drivers/of/unittest-data/overlay_18.dts
+++ b/drivers/of/unittest-data/overlay_18.dtso
diff --git a/drivers/of/unittest-data/overlay_19.dts b/drivers/of/unittest-data/overlay_19.dtso
index 32b3ba0b66a3..32b3ba0b66a3 100644
--- a/drivers/of/unittest-data/overlay_19.dts
+++ b/drivers/of/unittest-data/overlay_19.dtso
diff --git a/drivers/of/unittest-data/overlay_2.dts b/drivers/of/unittest-data/overlay_2.dtso
index db8684ba89d9..db8684ba89d9 100644
--- a/drivers/of/unittest-data/overlay_2.dts
+++ b/drivers/of/unittest-data/overlay_2.dtso
diff --git a/drivers/of/unittest-data/overlay_20.dts b/drivers/of/unittest-data/overlay_20.dtso
index d4a4f2f32ec7..d4a4f2f32ec7 100644
--- a/drivers/of/unittest-data/overlay_20.dts
+++ b/drivers/of/unittest-data/overlay_20.dtso
diff --git a/drivers/of/unittest-data/overlay_3.dts b/drivers/of/unittest-data/overlay_3.dtso
index 40f289e7c237..40f289e7c237 100644
--- a/drivers/of/unittest-data/overlay_3.dts
+++ b/drivers/of/unittest-data/overlay_3.dtso
diff --git a/drivers/of/unittest-data/overlay_4.dts b/drivers/of/unittest-data/overlay_4.dtso
index a8a77ddf9abe..a8a77ddf9abe 100644
--- a/drivers/of/unittest-data/overlay_4.dts
+++ b/drivers/of/unittest-data/overlay_4.dtso
diff --git a/drivers/of/unittest-data/overlay_5.dts b/drivers/of/unittest-data/overlay_5.dtso
index 706f5f1b737c..706f5f1b737c 100644
--- a/drivers/of/unittest-data/overlay_5.dts
+++ b/drivers/of/unittest-data/overlay_5.dtso
diff --git a/drivers/of/unittest-data/overlay_6.dts b/drivers/of/unittest-data/overlay_6.dtso
index 21a7fa4ca45e..21a7fa4ca45e 100644
--- a/drivers/of/unittest-data/overlay_6.dts
+++ b/drivers/of/unittest-data/overlay_6.dtso
diff --git a/drivers/of/unittest-data/overlay_7.dts b/drivers/of/unittest-data/overlay_7.dtso
index 58ba1bb51b50..58ba1bb51b50 100644
--- a/drivers/of/unittest-data/overlay_7.dts
+++ b/drivers/of/unittest-data/overlay_7.dtso
diff --git a/drivers/of/unittest-data/overlay_8.dts b/drivers/of/unittest-data/overlay_8.dtso
index e9718d118e38..e9718d118e38 100644
--- a/drivers/of/unittest-data/overlay_8.dts
+++ b/drivers/of/unittest-data/overlay_8.dtso
diff --git a/drivers/of/unittest-data/overlay_9.dts b/drivers/of/unittest-data/overlay_9.dtso
index b35e23edae50..b35e23edae50 100644
--- a/drivers/of/unittest-data/overlay_9.dts
+++ b/drivers/of/unittest-data/overlay_9.dtso
diff --git a/drivers/of/unittest-data/overlay_bad_add_dup_node.dts b/drivers/of/unittest-data/overlay_bad_add_dup_node.dtso
index 145dfc3b1024..145dfc3b1024 100644
--- a/drivers/of/unittest-data/overlay_bad_add_dup_node.dts
+++ b/drivers/of/unittest-data/overlay_bad_add_dup_node.dtso
diff --git a/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dtso
index 6327d1ffb963..6327d1ffb963 100644
--- a/drivers/of/unittest-data/overlay_bad_add_dup_prop.dts
+++ b/drivers/of/unittest-data/overlay_bad_add_dup_prop.dtso
diff --git a/drivers/of/unittest-data/overlay_bad_phandle.dts b/drivers/of/unittest-data/overlay_bad_phandle.dtso
index 83b797360318..83b797360318 100644
--- a/drivers/of/unittest-data/overlay_bad_phandle.dts
+++ b/drivers/of/unittest-data/overlay_bad_phandle.dtso
diff --git a/drivers/of/unittest-data/overlay_bad_symbol.dts b/drivers/of/unittest-data/overlay_bad_symbol.dtso
index 98c6d1de144a..98c6d1de144a 100644
--- a/drivers/of/unittest-data/overlay_bad_symbol.dts
+++ b/drivers/of/unittest-data/overlay_bad_symbol.dtso
diff --git a/drivers/of/unittest-data/overlay_base.dts b/drivers/of/unittest-data/overlay_base.dtso
index ab9014589c5d..ab9014589c5d 100644
--- a/drivers/of/unittest-data/overlay_base.dts
+++ b/drivers/of/unittest-data/overlay_base.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_01.dts b/drivers/of/unittest-data/overlay_gpio_01.dtso
index 699ff104ae10..699ff104ae10 100644
--- a/drivers/of/unittest-data/overlay_gpio_01.dts
+++ b/drivers/of/unittest-data/overlay_gpio_01.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_02a.dts b/drivers/of/unittest-data/overlay_gpio_02a.dtso
index ec59aff6ed47..ec59aff6ed47 100644
--- a/drivers/of/unittest-data/overlay_gpio_02a.dts
+++ b/drivers/of/unittest-data/overlay_gpio_02a.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_02b.dts b/drivers/of/unittest-data/overlay_gpio_02b.dtso
index 43ce111d41ce..43ce111d41ce 100644
--- a/drivers/of/unittest-data/overlay_gpio_02b.dts
+++ b/drivers/of/unittest-data/overlay_gpio_02b.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_03.dts b/drivers/of/unittest-data/overlay_gpio_03.dtso
index 6e0312340a1b..6e0312340a1b 100644
--- a/drivers/of/unittest-data/overlay_gpio_03.dts
+++ b/drivers/of/unittest-data/overlay_gpio_03.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_04a.dts b/drivers/of/unittest-data/overlay_gpio_04a.dtso
index 7b1e04ebfa7a..7b1e04ebfa7a 100644
--- a/drivers/of/unittest-data/overlay_gpio_04a.dts
+++ b/drivers/of/unittest-data/overlay_gpio_04a.dtso
diff --git a/drivers/of/unittest-data/overlay_gpio_04b.dts b/drivers/of/unittest-data/overlay_gpio_04b.dtso
index a14e95c6699a..a14e95c6699a 100644
--- a/drivers/of/unittest-data/overlay_gpio_04b.dts
+++ b/drivers/of/unittest-data/overlay_gpio_04b.dtso
diff --git a/drivers/of/unittest-data/testcases.dts b/drivers/of/unittest-data/testcases.dtso
index 61cdd3d5fccb..61cdd3d5fccb 100644
--- a/drivers/of/unittest-data/testcases.dts
+++ b/drivers/of/unittest-data/testcases.dtso
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index b89ab5d9fea5..1d810c0e18f8 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1423,12 +1423,12 @@ static int __init unittest_data_add(void)
 	void *unittest_data_align;
 	struct device_node *unittest_data_node = NULL, *np;
 	/*
-	 * __dtb_testcases_begin[] and __dtb_testcases_end[] are magically
-	 * created by cmd_dt_S_dtb in scripts/Makefile.lib
+	 * __dtbo_testcases_begin[] and __dtbo_testcases_end[] are magically
+	 * created by cmd_dt_S_dtbo in scripts/Makefile.lib
 	 */
-	extern uint8_t __dtb_testcases_begin[];
-	extern uint8_t __dtb_testcases_end[];
-	const int size = __dtb_testcases_end - __dtb_testcases_begin;
+	extern uint8_t __dtbo_testcases_begin[];
+	extern uint8_t __dtbo_testcases_end[];
+	const int size = __dtbo_testcases_end - __dtbo_testcases_begin;
 	int rc;
 	void *ret;
 
@@ -1443,7 +1443,7 @@ static int __init unittest_data_add(void)
 		return -ENOMEM;
 
 	unittest_data_align = PTR_ALIGN(unittest_data, FDT_ALIGN_SIZE);
-	memcpy(unittest_data_align, __dtb_testcases_begin, size);
+	memcpy(unittest_data_align, __dtbo_testcases_begin, size);
 
 	ret = of_fdt_unflatten_tree(unittest_data_align, NULL, &unittest_data_node);
 	if (!ret) {
@@ -3003,24 +3003,24 @@ static inline void __init of_unittest_overlay(void) { }
 #ifdef CONFIG_OF_OVERLAY
 
 /*
- * __dtb_ot_begin[] and __dtb_ot_end[] are created by cmd_dt_S_dtb
- * in scripts/Makefile.lib
+ * __dtbo_##overlay_name##_begin[] and __dtbo_##overlay_name##_end[] are
+ * created by cmd_dt_S_dtbo in scripts/Makefile.lib
  */
 
-#define OVERLAY_INFO_EXTERN(name) \
-	extern uint8_t __dtb_##name##_begin[]; \
-	extern uint8_t __dtb_##name##_end[]
+#define OVERLAY_INFO_EXTERN(overlay_name) \
+	extern uint8_t __dtbo_##overlay_name##_begin[]; \
+	extern uint8_t __dtbo_##overlay_name##_end[]
 
-#define OVERLAY_INFO(overlay_name, expected)             \
-{	.dtb_begin       = __dtb_##overlay_name##_begin, \
-	.dtb_end         = __dtb_##overlay_name##_end,   \
-	.expected_result = expected,                     \
-	.name            = #overlay_name,                \
+#define OVERLAY_INFO(overlay_name, expected) \
+{	.dtbo_begin       = __dtbo_##overlay_name##_begin, \
+	.dtbo_end         = __dtbo_##overlay_name##_end, \
+	.expected_result = expected, \
+	.name            = #overlay_name, \
 }
 
 struct overlay_info {
-	uint8_t		*dtb_begin;
-	uint8_t		*dtb_end;
+	uint8_t		*dtbo_begin;
+	uint8_t		*dtbo_end;
 	int		expected_result;
 	int		ovcs_id;
 	char		*name;
@@ -3094,7 +3094,7 @@ static struct overlay_info overlays[] = {
 	OVERLAY_INFO(overlay_bad_phandle, -EINVAL),
 	OVERLAY_INFO(overlay_bad_symbol, -EINVAL),
 	/* end marker */
-	{.dtb_begin = NULL, .dtb_end = NULL, .expected_result = 0, .name = NULL}
+	{.dtbo_begin = NULL, .dtbo_end = NULL, .expected_result = 0, .name = NULL}
 };
 
 static struct device_node *overlay_base_root;
@@ -3151,13 +3151,13 @@ void __init unittest_unflatten_overlay_base(void)
 		return;
 	}
 
-	data_size = info->dtb_end - info->dtb_begin;
+	data_size = info->dtbo_end - info->dtbo_begin;
 	if (!data_size) {
 		pr_err("No dtb 'overlay_base' to attach\n");
 		return;
 	}
 
-	size = fdt_totalsize(info->dtb_begin);
+	size = fdt_totalsize(info->dtbo_begin);
 	if (size != data_size) {
 		pr_err("dtb 'overlay_base' header totalsize != actual size");
 		return;
@@ -3169,7 +3169,7 @@ void __init unittest_unflatten_overlay_base(void)
 		return;
 	}
 
-	memcpy(new_fdt, info->dtb_begin, size);
+	memcpy(new_fdt, info->dtbo_begin, size);
 
 	__unflatten_device_tree(new_fdt, NULL, &overlay_base_root,
 				dt_alloc_memory, true);
@@ -3204,11 +3204,11 @@ static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id)
 		return 0;
 	}
 
-	size = info->dtb_end - info->dtb_begin;
+	size = info->dtbo_end - info->dtbo_begin;
 	if (!size)
 		pr_err("no overlay data for %s\n", overlay_name);
 
-	ret = of_overlay_fdt_apply(info->dtb_begin, size, &info->ovcs_id);
+	ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id);
 	if (ovcs_id)
 		*ovcs_id = info->ovcs_id;
 	if (ret < 0)
diff --git a/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts b/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dtso
index 096137fcd5cc..096137fcd5cc 100644
--- a/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dts
+++ b/drivers/staging/pi433/Documentation/devicetree/pi433-overlay.dtso
diff --git a/drivers/staging/pi433/Documentation/devicetree/pi433.txt b/drivers/staging/pi433/Documentation/devicetree/pi433.txt
index a810548c5857..d317c0ec3419 100644
--- a/drivers/staging/pi433/Documentation/devicetree/pi433.txt
+++ b/drivers/staging/pi433/Documentation/devicetree/pi433.txt
@@ -48,13 +48,13 @@ For Raspbian users only
 =======================
 Since Raspbian supports device tree overlays, you may use an overlay instead
 of editing your boards device tree.
-To use the overlay, you need to compile the file pi433-overlay.dts which can
+To use the overlay, you need to compile the file pi433-overlay.dtso which can
 be found alongside this documentation.
 The file needs to be compiled - either manually or by integration in your kernel
 source tree. For a manual compile, you may use a command line like the following:
-'linux/scripts/dtc/dtc -@ -I dts -O dtb -o pi433.dtbo pi433-overlay.dts'
+'linux/scripts/dtc/dtc -@ -I dts -O dtb -o pi433.dtbo pi433-overlay.dtso'
 
-For compiling inside of the kernel tree, you need to copy pi433-overlay.dts to
+For compiling inside of the kernel tree, you need to copy pi433-overlay.dtso to
 arch/arm/boot/dts/overlays and you need to add the file to the list of files
 in the Makefile over there. Execute 'make dtbs' in kernel tree root to make the
 kernel make files compile the device tree overlay for you.
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 41f3602fc8de..3ceab076127b 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -468,10 +468,12 @@ intermediate_targets = $(foreach sfx, $(2), \
 					$(filter %$(strip $(1)), $(targets))))
 # %.asn1.o <- %.asn1.[ch] <- %.asn1
 # %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
+# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso
 # %.lex.o <- %.lex.c <- %.l
 # %.tab.o <- %.tab.[ch] <- %.y
 targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
 	   $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \
+	   $(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo) \
 	   $(call intermediate_targets, .lex.o, .lex.c) \
 	   $(call intermediate_targets, .tab.o, .tab.c .tab.h)
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 3aa384cec76b..250b9fd73f6d 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -358,7 +358,7 @@ DTC_FLAGS += $(DTC_FLAGS_$(basetarget))
 DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@)
 
 # Generate an assembly file to wrap the output of the device tree compiler
-quiet_cmd_dt_S_dtb= DTB     $@
+quiet_cmd_dt_S_dtb= DTBS    $@
 cmd_dt_S_dtb=						\
 {							\
 	echo '\#include <asm-generic/vmlinux.lds.h>'; 	\
@@ -375,6 +375,24 @@ cmd_dt_S_dtb=						\
 $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
 	$(call if_changed,dt_S_dtb)
 
+# Generate an assembly file to wrap the output of the device tree compiler
+quiet_cmd_dt_S_dtbo= DTBOS   $@
+cmd_dt_S_dtbo=						\
+{							\
+	echo '\#include <asm-generic/vmlinux.lds.h>';	\
+	echo '.section .dtb.init.rodata,"a"';		\
+	echo '.balign STRUCT_ALIGNMENT';		\
+	echo '.global __dtbo_$(subst -,_,$(*F))_begin';	\
+	echo '__dtbo_$(subst -,_,$(*F))_begin:';	\
+	echo '.incbin "$<" ';				\
+	echo '__dtbo_$(subst -,_,$(*F))_end:';		\
+	echo '.global __dtbo_$(subst -,_,$(*F))_end';	\
+	echo '.balign STRUCT_ALIGNMENT';		\
+} > $@
+
+$(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE
+	$(call if_changed,dt_S_dtbo)
+
 quiet_cmd_dtc = DTC     $@
 cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 	$(DTC) -o $@ -b 0 \
@@ -408,6 +426,9 @@ $(obj)/%.dtb: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
 $(obj)/%.dtbo: $(src)/%.dts $(DTC) FORCE
 	$(call if_changed_dep,dtc)
 
+$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
+	$(call if_changed_dep,dtc)
+
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
 # Bzip2