dts: automatically build necessary .dtb files

When building for a custom board, it is quite common to maintain a
private branch which include some defconfig and .dts files. But to
hook up those .dts files requires modifying a file "belonging" to
upstream U-Boot, the arch/*/dts/Makefile. Forward-porting that branch
to a newer upstream then often results in a conflict which, while it
is trivial to resolve by hand, makes it harder to have a CI do "try to
build our board against latest upstream".

The .config usually includes information on precisely what .dtb(s) are
needed, so to avoid having to modify the Makefile, simply add the
files in (SPL_)OF_LIST to dtb-y.

A technicality is that (SPL_)OF_LIST is not always defined, so rework
the Kconfig symbols so that (SPL_)OF_LIST is always defined (when
(SPL_)OF_CONTROL), but only prompted for in the cases which used to be
their "depends on".

nios2 and microblaze already have something like this in their
dts/Makefile, and the rationale in commit 41f59f68539 is similar to
the above. So this simply generalizes existing practice. Followup
patches could remove the logic in those two makefiles, just as there's
potential for moving some common boilerplate from all the
arch/*/dts/Makefile files to the new scripts/Makefile.dts.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>

13 files changed, 26 insertions, 0 deletions

diff --git a/arch/arc/dts/Makefile b/arch/arc/dts/Makefile
index 515fe1f..532a813 100644
--- a/arch/arc/dts/Makefile
+++ b/arch/arc/dts/Makefile
@@ -8,6 +8,8 @@ dtb-$(CONFIG_TARGET_EMSDP) +=  emsdp.dtb
 dtb-$(CONFIG_TARGET_HSDK) +=  hsdk.dtb hsdk-4xd.dtb
 dtb-$(CONFIG_TARGET_IOT_DEVKIT) +=  iot_devkit.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 5a57069..c1cec72 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1205,6 +1205,8 @@ dtb-$(CONFIG_TARGET_EA_LPC3250DEVKITV2) += lpc3250-ea3250.dtb
 
 dtb-$(CONFIG_ARCH_QEMU) += qemu-arm.dtb qemu-arm64.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here
diff --git a/arch/m68k/dts/Makefile b/arch/m68k/dts/Makefile
index fdd435b..7988522 100644
--- a/arch/m68k/dts/Makefile
+++ b/arch/m68k/dts/Makefile
@@ -18,6 +18,8 @@ dtb-$(CONFIG_TARGET_M5373EVB) += M5373EVB.dtb
 dtb-$(CONFIG_TARGET_AMCORE) += amcore.dtb
 dtb-$(CONFIG_TARGET_STMARK2) += stmark2.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/microblaze/dts/Makefile b/arch/microblaze/dts/Makefile
index 4690dc1..427a8f9 100644
--- a/arch/microblaze/dts/Makefile
+++ b/arch/microblaze/dts/Makefile
@@ -2,6 +2,8 @@
 
 dtb-y += $(shell echo $(CONFIG_DEFAULT_DEVICE_TREE)).dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/mips/dts/Makefile b/arch/mips/dts/Makefile
index 215283c..95144b2 100644
--- a/arch/mips/dts/Makefile
+++ b/arch/mips/dts/Makefile
@@ -34,6 +34,8 @@ dtb-$(CONFIG_SOC_JR2) += jr2_pcb110.dtb jr2_pcb111.dtb serval2_pcb112.dtb
 dtb-$(CONFIG_SOC_SERVALT) += servalt_pcb116.dtb
 dtb-$(CONFIG_SOC_SERVAL) += serval_pcb105.dtb serval_pcb106.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here
diff --git a/arch/nds32/dts/Makefile b/arch/nds32/dts/Makefile
index a8e23ad..5a09e3b 100644
--- a/arch/nds32/dts/Makefile
+++ b/arch/nds32/dts/Makefile
@@ -2,6 +2,8 @@
 
 dtb-$(CONFIG_TARGET_ADP_AG101P) += ag101p.dtb
 dtb-$(CONFIG_TARGET_ADP_AE3XX) += ae3xx.dtb
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/nios2/dts/Makefile b/arch/nios2/dts/Makefile
index 0014acf..2b29fa9 100644
--- a/arch/nios2/dts/Makefile
+++ b/arch/nios2/dts/Makefile
@@ -2,6 +2,8 @@
 
 dtb-y += $(CONFIG_DEFAULT_DEVICE_TREE:"%"=%).dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/powerpc/dts/Makefile b/arch/powerpc/dts/Makefile
index 66d22ae..a4b0d7d 100644
--- a/arch/powerpc/dts/Makefile
+++ b/arch/powerpc/dts/Makefile
@@ -30,6 +30,8 @@ dtb-$(CONFIG_TARGET_TUXX1) += kmtuxa1.dtb
 dtb-$(CONFIG_TARGET_MCR3000) += mcr3000.dtb
 dtb-$(CONFIG_TARGET_GAZERBEAM) += gazerbeam.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here
diff --git a/arch/riscv/dts/Makefile b/arch/riscv/dts/Makefile
index 90d3f35..5c15a0f 100644
--- a/arch/riscv/dts/Makefile
+++ b/arch/riscv/dts/Makefile
@@ -8,6 +8,8 @@ dtb-$(CONFIG_TARGET_SIFIVE_UNLEASHED) += hifive-unleashed-a00.dtb
 dtb-$(CONFIG_TARGET_SIFIVE_UNMATCHED) += hifive-unmatched-a00.dtb
 dtb-$(CONFIG_TARGET_SIPEED_MAIX) += k210-maix-bit.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/sandbox/dts/Makefile b/arch/sandbox/dts/Makefile
index 3e5dc67..6cbc9bbc 100644
--- a/arch/sandbox/dts/Makefile
+++ b/arch/sandbox/dts/Makefile
@@ -8,6 +8,8 @@ endif
 dtb-$(CONFIG_UT_DM) += test.dtb
 dtb-$(CONFIG_CMD_EXTENSION) += overlay0.dtbo overlay1.dtbo
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p 0x1000
diff --git a/arch/sh/dts/Makefile b/arch/sh/dts/Makefile
index e423bfd..144fd3e 100644
--- a/arch/sh/dts/Makefile
+++ b/arch/sh/dts/Makefile
@@ -1,5 +1,7 @@
 dtb-y += sh7751-r2dplus.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here
diff --git a/arch/x86/dts/Makefile b/arch/x86/dts/Makefile
index 5c8c05e..cd77f4c 100644
--- a/arch/x86/dts/Makefile
+++ b/arch/x86/dts/Makefile
@@ -22,6 +22,8 @@ dtb-y += bayleybay.dtb \
 	slimbootloader.dtb \
 	baytrail_som-db5800-som-6867.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS += -R 4 -p $(if $(CONFIG_EFI_APP),0x8000,0x1000)
diff --git a/arch/xtensa/dts/Makefile b/arch/xtensa/dts/Makefile
index 06ee25d..fbbdefa 100644
--- a/arch/xtensa/dts/Makefile
+++ b/arch/xtensa/dts/Makefile
@@ -2,6 +2,8 @@
 
 dtb-$(CONFIG_XTFPGA) += ml605.dtb ml605_nommu.dtb kc705.dtb kc705_nommu.dtb
 
+include $(srctree)/scripts/Makefile.dts
+
 targets += $(dtb-y)
 
 DTC_FLAGS +=