kernel: Allow overriding dtb target
On some devices we might want to build just the *.dtb files
that we actually need instead of the every dtb that exists.
Change-Id: Id7a152499d4ee1dd08f79d34cc34bfe959313515
diff --git a/build/tasks/kernel.mk b/build/tasks/kernel.mk
index 5ea7962..72c32f9 100644
--- a/build/tasks/kernel.mk
+++ b/build/tasks/kernel.mk
@@ -481,7 +481,7 @@
@echo "Building dtb.img"
$(hide) find $(DTB_OUT)/arch/$(KERNEL_ARCH)/boot/dts -type f -name "*.dtb" | xargs rm -f
$(call make-dtb-target,$(KERNEL_DEFCONFIG))
- $(call make-dtb-target,dtbs)
+ $(call make-dtb-target,$(TARGET_KERNEL_DTB))
cat $(shell find $(DTB_OUT)/arch/$(KERNEL_ARCH)/boot/dts -type f -name "*.dtb" | sort) > $@
$(hide) touch -c $(DTB_OUT)
endif # !BOARD_PREBUILT_DTBIMAGE_DIR
diff --git a/config/BoardConfigKernel.mk b/config/BoardConfigKernel.mk
index 53cadfa..faaa65b 100644
--- a/config/BoardConfigKernel.mk
+++ b/config/BoardConfigKernel.mk
@@ -35,6 +35,8 @@
# Defaults to empty
# TARGET_KERNEL_DTBO = Name of the kernel Makefile target that
# generates dtbo.img. Defaults to dtbo.img
+# TARGET_KERNEL_DTB = Name of the kernel Makefile target that
+# generates the *.dtb targets. Defaults to dtbs
#
# KERNEL_TOOLCHAIN_PREFIX = Overrides TARGET_KERNEL_CROSS_COMPILE_PREFIX,
# Set this var in shell to override
@@ -153,6 +155,9 @@
BOARD_PREBUILT_DTBOIMAGE ?= $(TARGET_OUT_INTERMEDIATES)/DTBO_OBJ/arch/$(KERNEL_ARCH)/boot/$(TARGET_KERNEL_DTBO_PREFIX)$(TARGET_KERNEL_DTBO)
endif
+# Set the default dtb target
+TARGET_KERNEL_DTB ?= dtbs
+
# Set use the full path to the make command
KERNEL_MAKE_CMD := $(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/make