[PATCH 02/13] treewide: collect the name of all board device trees

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Linux collects device trees by adding them to dtb-y, but in barebox we
just add them normally to obj- or pbl- (or lwl-) and have rules matching
the .dtb.o extension take care of invoking the device tree compiler.

In preparation for assembling a list of all enabled device trees, let's
introduce dtb- and dtb-y variables like in Linux, which will hold the
list of enabled device trees.

As we are not interested in the device trees added by unit tests, we
will ignore any device trees outside of pbl-y and lwl-y and change
existing board device trees for non-PBL platforms to use lwl- instead.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/kvx/dts/Makefile      | 4 ++--
 arch/openrisc/dts/Makefile | 2 +-
 arch/sandbox/dts/Makefile  | 2 +-
 scripts/Makefile.lib       | 3 +++
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/kvx/dts/Makefile b/arch/kvx/dts/Makefile
index 41613033ce81..597b905624de 100644
--- a/arch/kvx/dts/Makefile
+++ b/arch/kvx/dts/Makefile
@@ -6,9 +6,9 @@ obj- += dummy.o
 
 BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_NAME))
 ifneq ($(BUILTIN_DTB),)
-obj-$(CONFIG_BUILTIN_DTB) += $(BUILTIN_DTB).dtb.o
+lwl-$(CONFIG_BUILTIN_DTB) += $(BUILTIN_DTB).dtb.o
 endif
 
-obj-$(CONFIG_BOARD_K200) += k200.dtb.o
+lwl-$(CONFIG_BOARD_K200) += k200.dtb.o
 
 clean-files := *.dtb *.dtb.S .*.dtc .*.pre .*.dts *.dtb.z
diff --git a/arch/openrisc/dts/Makefile b/arch/openrisc/dts/Makefile
index 6778abe1b4fd..01cb2195fda3 100644
--- a/arch/openrisc/dts/Makefile
+++ b/arch/openrisc/dts/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_BUILTIN_DTB_NAME))
-obj-$(CONFIG_BUILTIN_DTB) += $(BUILTIN_DTB).dtb.o
+lwl-$(CONFIG_BUILTIN_DTB) += $(BUILTIN_DTB).dtb.o
 
 clean-files := *.dtb *.dtb.S .*.dtc .*.pre .*.dts *.dtb.z
diff --git a/arch/sandbox/dts/Makefile b/arch/sandbox/dts/Makefile
index 79625b103eba..5eb6aeeb14cb 100644
--- a/arch/sandbox/dts/Makefile
+++ b/arch/sandbox/dts/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
-obj-$(CONFIG_OFTREE) += \
+lwl-$(CONFIG_OFTREE) += \
 	sandbox.dtb.o
 
 # just to build a built-in.o. Otherwise compilation fails when no devicetree is
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index c32adf07cc51..0dfb496777dd 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -35,6 +35,9 @@ else
 obj-y		+= $(lwl-y)
 endif
 
+dtb- 		+= $(patsubst %.dtb.o,%.dtb,$(filter %.dtb.o,$(pbl-)  $(lwl-)))
+dtb-y		+= $(patsubst %.dtb.o,%.dtb,$(filter %.dtb.o,$(pbl-y) $(lwl-y)))
+
 obj-y		+= $(obj-pbl-y)
 pbl-y		+= $(obj-pbl-y)
 
-- 
2.39.5