# Support for device tree generation
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python () {
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if not bb.data.inherits_class('nopackages', d):
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d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-devicetree")
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if d.getVar('KERNEL_DEVICETREE_BUNDLE') == '1':
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d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-image-zimage-bundle")
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}
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FILES:${KERNEL_PACKAGE_NAME}-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
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FILES:${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
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# Generate kernel+devicetree bundle
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KERNEL_DEVICETREE_BUNDLE ?= "0"
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# dtc flags passed via DTC_FLAGS env variable
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KERNEL_DTC_FLAGS ?= ""
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normalize_dtb () {
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dtb="$1"
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if echo $dtb | grep -q '/dts/'; then
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bbwarn "$dtb contains the full path to the the dts file, but only the dtb name should be used."
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dtb=`basename $dtb | sed 's,\.dts$,.dtb,g'`
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fi
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echo "$dtb"
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}
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get_real_dtb_path_in_kernel () {
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dtb="$1"
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dtb_path="${B}/arch/${ARCH}/boot/dts/$dtb"
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if [ ! -e "$dtb_path" ]; then
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dtb_path="${B}/arch/${ARCH}/boot/$dtb"
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fi
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echo "$dtb_path"
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}
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do_configure:append() {
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if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
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if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
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case "${ARCH}" in
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"arm")
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config="${B}/.config"
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if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
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bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
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sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
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echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
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echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
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fi
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;;
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*)
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bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
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esac
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else
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bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
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fi
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fi
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}
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do_compile:append() {
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if [ -n "${KERNEL_DTC_FLAGS}" ]; then
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export DTC_FLAGS="${KERNEL_DTC_FLAGS}"
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fi
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for dtbf in ${KERNEL_DEVICETREE}; do
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dtb=`normalize_dtb "$dtbf"`
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oe_runmake $dtb CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
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done
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}
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do_install:append() {
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for dtbf in ${KERNEL_DEVICETREE}; do
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dtb=`normalize_dtb "$dtbf"`
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dtb_ext=${dtb##*.}
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dtb_base_name=`basename $dtb .$dtb_ext`
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dtb_path=`get_real_dtb_path_in_kernel "$dtb"`
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install -m 0644 $dtb_path ${D}/${KERNEL_IMAGEDEST}/$dtb_base_name.$dtb_ext
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done
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}
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do_deploy:append() {
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for dtbf in ${KERNEL_DEVICETREE}; do
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dtb=`normalize_dtb "$dtbf"`
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dtb_ext=${dtb##*.}
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dtb_base_name=`basename $dtb .$dtb_ext`
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install -d $deployDir
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install -m 0644 ${D}/${KERNEL_IMAGEDEST}/$dtb_base_name.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext
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ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name.$dtb_ext
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ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext
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for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
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if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
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cat ${D}/${KERNEL_IMAGEDEST}/$type \
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$deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
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> $deployDir/$type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin
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ln -sf $type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin \
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$deployDir/$type-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext.bin
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if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
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cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
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$deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \
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> $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin
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ln -sf ${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext.bin \
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$deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext.bin
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fi
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fi
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done
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done
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}
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