From 7542fb08d2726606057c4283b3a454abb195a0f5 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Mon, 23 Sep 2019 09:26:41 +0100 Subject: [PATCH] kbuild: Allow .dtbo overlays to be built piecemeal Before 4.20, it was possible to build an arbitrary overlay by copying it to arm/boot/dts/overlays/mytest-overlay.dts and running: make ARCH=arm overlays/mytest.dtbo In 4.20 the .dtb build rules were centralised, requiring the dowstream .dtbo build rules to be changed. They were, enough to support "make ... dtbs", but not sufficiently to allow this ad-hoc, one-off building of individual files. Add the missing makefile rule to support this way of building. See: https://github.com/raspberrypi/linux/issues/3250 Signed-off-by: Phil Elwell --- Makefile | 3 +++ 1 file changed, 3 insertions(+) --- a/Makefile +++ b/Makefile @@ -1274,6 +1274,9 @@ ifneq ($(dtstree),) %.dtb: include/config/kernel.release scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ +%.dtbo: prepare3 scripts_dtc + $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ + PHONY += dtbs dtbs_install dtbs_check dtbs: include/config/kernel.release scripts_dtc $(Q)$(MAKE) $(build)=$(dtstree)