2020-02-29 08:25:20 +00:00
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From 7542fb08d2726606057c4283b3a454abb195a0f5 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 23 Sep 2019 09:26:41 +0100
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Subject: [PATCH] kbuild: Allow .dtbo overlays to be built piecemeal
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Before 4.20, it was possible to build an arbitrary overlay by copying
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it to arm/boot/dts/overlays/mytest-overlay.dts and running:
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make ARCH=arm overlays/mytest.dtbo
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In 4.20 the .dtb build rules were centralised, requiring the dowstream
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.dtbo build rules to be changed. They were, enough to support "make ...
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dtbs", but not sufficiently to allow this ad-hoc, one-off building of
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individual files.
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Add the missing makefile rule to support this way of building.
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See: https://github.com/raspberrypi/linux/issues/3250
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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Makefile | 3 +++
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1 file changed, 3 insertions(+)
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--- a/Makefile
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+++ b/Makefile
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2020-03-09 11:39:35 +00:00
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@@ -1238,6 +1238,9 @@ ifneq ($(dtstree),)
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2020-02-29 08:25:20 +00:00
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%.dtb: include/config/kernel.release scripts_dtc
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$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
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+%.dtbo: prepare3 scripts_dtc
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+ $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
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+
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PHONY += dtbs dtbs_install dt_binding_check
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dtbs dtbs_check: include/config/kernel.release scripts_dtc
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$(Q)$(MAKE) $(build)=$(dtstree)
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