1 files changed, 62 insertions, 0 deletions
diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
new file mode 100644
index 0000000000..72814ca224
--- /dev/null
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -0,0 +1,62 @@
+# Support for device tree generation
+PACKAGES_append = " kernel-devicetree"
+FILES_kernel-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
+
+normalize_dtb () {
+	DTB="$1"
+	if echo ${DTB} | grep -q '/dts/'; then
+		bbwarn "${DTB} contains the full path to the the dts file, but only the dtb name should be used."
+		DTB=`basename ${DTB} | sed 's,\.dts$,.dtb,g'`
+	fi
+	echo "${DTB}"
+}
+
+get_real_dtb_path_in_kernel () {
+	DTB="$1"
+	DTB_PATH="${B}/arch/${ARCH}/boot/dts/${DTB}"
+	if [ ! -e "${DTB_PATH}" ]; then
+		DTB_PATH="${B}/arch/${ARCH}/boot/${DTB}"
+	fi
+	echo "${DTB_PATH}"
+}
+
+do_compile_append() {
+	for DTB in ${KERNEL_DEVICETREE}; do
+		DTB=`normalize_dtb "${DTB}"`
+		oe_runmake ${DTB}
+	done
+}
+
+do_install_append() {
+	for DTB in ${KERNEL_DEVICETREE}; do
+		DTB=`normalize_dtb "${DTB}"`
+		DTB_EXT=${DTB##*.}
+		DTB_PATH=`get_real_dtb_path_in_kernel "${DTB}"`
+		DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
+		install -m 0644 ${DTB_PATH} ${D}/${KERNEL_IMAGEDEST}/${DTB_BASE_NAME}.${DTB_EXT}
+		for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
+			symlink_name=${type}"-"${KERNEL_IMAGE_SYMLINK_NAME}
+			DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
+			ln -sf ${DTB_BASE_NAME}.${DTB_EXT} ${D}/${KERNEL_IMAGEDEST}/devicetree-${DTB_SYMLINK_NAME}.${DTB_EXT}
+		done
+	done
+}
+
+do_deploy_append() {
+	for DTB in ${KERNEL_DEVICETREE}; do
+		DTB=`normalize_dtb "${DTB}"`
+		DTB_EXT=${DTB##*.}
+		DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
+		for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
+			base_name=${type}"-"${KERNEL_IMAGE_BASE_NAME}
+			symlink_name=${type}"-"${KERNEL_IMAGE_SYMLINK_NAME}
+			DTB_NAME=`echo ${base_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
+			DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
+			DTB_PATH=`get_real_dtb_path_in_kernel "${DTB}"`
+			install -d ${DEPLOYDIR}
+			install -m 0644 ${DTB_PATH} ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}
+			ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_SYMLINK_NAME}.${DTB_EXT}
+			ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_BASE_NAME}.${DTB_EXT}
+		done
+	done
+}