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authorOtavio Salvador <otavio@ossystems.com.br>2017-09-21 10:58:33 -0300
committerRichard Purdie <richard.purdie@linuxfoundation.org>2017-09-25 14:14:03 +0100
commitf044567326988e84e5d72040e9387c3240836ddb (patch)
tree5990344479651605972dcce34785acc45121a31f /meta/classes
parentce935784cfc53c029c8dfa969d08ee43a8831b60 (diff)
downloadopenembedded-core-f044567326988e84e5d72040e9387c3240836ddb.tar.gz
kernel-devicetree.bbclass: Add support to generate append to kernel
The are use cases where the Device Tree appended to the kernel is convinient, so we generate the bundle concatenating the kernel (and potentionally the initramfs) and the Device Tree binaries. To enable it, set KERNEL_DEVICETREE_BUNDLE variable to '1' Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Ross Burton <ross.burton@intel.com>
Diffstat (limited to 'meta/classes')
-rw-r--r--meta/classes/kernel-devicetree.bbclass52
1 files changed, 51 insertions, 1 deletions
diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
index 72814ca224..6e08be4b70 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -1,6 +1,13 @@
# Support for device tree generation
-PACKAGES_append = " kernel-devicetree"
+PACKAGES_append = " \
+ kernel-devicetree \
+ ${@['kernel-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
+"
FILES_kernel-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
+FILES_kernel-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
+
+# Generate kernel+devicetree bundle
+KERNEL_DEVICETREE_BUNDLE ?= "0"
normalize_dtb () {
DTB="$1"
@@ -20,6 +27,28 @@ get_real_dtb_path_in_kernel () {
echo "${DTB_PATH}"
}
+do_configure_append() {
+ if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+ if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
+ case "${ARCH}" in
+ "arm")
+ config="${B}/.config"
+ if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
+ bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
+ sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
+ echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
+ echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
+ fi
+ ;;
+ *)
+ bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
+ esac
+ else
+ bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
+ fi
+ fi
+}
+
do_compile_append() {
for DTB in ${KERNEL_DEVICETREE}; do
DTB=`normalize_dtb "${DTB}"`
@@ -38,6 +67,12 @@ do_install_append() {
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}
+
+ if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+ cat ${D}/${KERNEL_IMAGEDEST}/$type \
+ ${D}/${KERNEL_IMAGEDEST}/${DTB_BASE_NAME}.${DTB_EXT} \
+ > ${D}/${KERNEL_IMAGEDEST}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
+ fi
done
done
}
@@ -57,6 +92,21 @@ do_deploy_append() {
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}.${DTB_EXT}
+
+ if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+ cat ${DEPLOYDIR}/$type \
+ ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
+ > ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}.bin
+ ln -sf ${DTB_NAME}.${DTB_EXT}.bin ${DEPLOYDIR}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
+
+ if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
+ cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
+ ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
+ > ${DEPLOYDIR}/${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin
+ ln -sf ${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin \
+ ${DEPLOYDIR}/${type}-initramfs-${DTB_BASE_NAME}.${DTB_EXT}-${MACHINE}.bin
+ fi
+ fi
done
done
}