[RESEND PATCHv2 1/4] ARM: dts: add support for building DT overlays
From: Frank Rowand <hidden>
Date: 2018-09-05 20:36:20
Also in:
linux-devicetree
+cc: devicetree-compiler at vger.kernel.org
For context on the device-tree compiler list, this patch is for
the Linux kernel.
On 09/04/18 01:05, Tero Kristo wrote:quoted hunk ↗ jump to hunk
Add simple support for building DT overlays. This just compiles any given .dtso file under the base arch/arm/boot/dts directory into a .dtbo. Signed-off-by: Tero Kristo <redacted> --- arch/arm/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/arch/arm/Makefile b/arch/arm/Makefile index d1516f8..ab555a0 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile@@ -339,7 +339,7 @@ $(BOOT_TARGETS): vmlinux $(INSTALL_TARGETS): $(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@ -%.dtb: | scripts +%.dtb %.dtbo: | scripts $(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@ PHONY += dtbs dtbs_install
The idea of adding knowledge of .dtso and .dtbo files to the dtc compiler, but that idea and the related patches have fallen by the wayside. Current overlay sources and blobs are properly handled by dtc when they are .dts and .dtb files. If the dtc compiler is updated with knowledge of .dtso and .dtbo then these changes would be needed. At the moment the distinction of a .dtso and .dtbo is a naming convention that provides a clue about the intended use of the file. But dtc does not know these file name extensions, requiring a specific flag to tell dtc to treat them as .dts or .dtb files. I think the negative outweighs the positive for this patch. -Frank