1# 2# Copyright OpenEmbedded Contributors 3# 4# SPDX-License-Identifier: MIT 5# 6 7# Support for device tree generation 8python () { 9 if not bb.data.inherits_class('nopackages', d): 10 d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-devicetree") 11 if d.getVar('KERNEL_DEVICETREE_BUNDLE') == '1': 12 d.appendVar("PACKAGES", " ${KERNEL_PACKAGE_NAME}-image-zimage-bundle") 13} 14 15FILES:${KERNEL_PACKAGE_NAME}-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo" 16FILES:${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin" 17 18# Generate kernel+devicetree bundle 19KERNEL_DEVICETREE_BUNDLE ?= "0" 20 21# dtc flags passed via DTC_FLAGS env variable 22KERNEL_DTC_FLAGS ?= "" 23 24normalize_dtb () { 25 dtb="$1" 26 if echo $dtb | grep -q '/dts/'; then 27 bbwarn "$dtb contains the full path to the the dts file, but only the dtb name should be used." 28 dtb=`basename $dtb | sed 's,\.dts$,.dtb,g'` 29 fi 30 echo "$dtb" 31} 32 33get_real_dtb_path_in_kernel () { 34 dtb="$1" 35 dtb_path="${B}/arch/${ARCH}/boot/dts/$dtb" 36 if [ ! -e "$dtb_path" ]; then 37 dtb_path="${B}/arch/${ARCH}/boot/$dtb" 38 fi 39 echo "$dtb_path" 40} 41 42do_configure:append() { 43 if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then 44 if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then 45 case "${ARCH}" in 46 "arm") 47 config="${B}/.config" 48 if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then 49 bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!' 50 sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config 51 echo "CONFIG_ARM_APPENDED_DTB=y" >> $config 52 echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config 53 fi 54 ;; 55 *) 56 bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'." 57 esac 58 else 59 bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.' 60 fi 61 fi 62} 63 64do_compile:append() { 65 if [ -n "${KERNEL_DTC_FLAGS}" ]; then 66 export DTC_FLAGS="${KERNEL_DTC_FLAGS}" 67 fi 68 69 for dtbf in ${KERNEL_DEVICETREE}; do 70 dtb=`normalize_dtb "$dtbf"` 71 oe_runmake $dtb CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" OBJCOPY="${KERNEL_OBJCOPY}" ${KERNEL_EXTRA_ARGS} 72 done 73} 74 75do_install:append() { 76 for dtbf in ${KERNEL_DEVICETREE}; do 77 dtb=`normalize_dtb "$dtbf"` 78 dtb_ext=${dtb##*.} 79 dtb_base_name=`basename $dtb .$dtb_ext` 80 dtb_path=`get_real_dtb_path_in_kernel "$dtb"` 81 install -m 0644 $dtb_path ${D}/${KERNEL_IMAGEDEST}/$dtb_base_name.$dtb_ext 82 done 83} 84 85do_deploy:append() { 86 for dtbf in ${KERNEL_DEVICETREE}; do 87 dtb=`normalize_dtb "$dtbf"` 88 dtb_ext=${dtb##*.} 89 dtb_base_name=`basename $dtb .$dtb_ext` 90 install -d $deployDir 91 install -m 0644 ${D}/${KERNEL_IMAGEDEST}/$dtb_base_name.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext 92 if [ "${KERNEL_IMAGETYPE_SYMLINK}" = "1" ] ; then 93 ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name.$dtb_ext 94 fi 95 if [ -n "${KERNEL_DTB_LINK_NAME}" ] ; then 96 ln -sf $dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext 97 fi 98 for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do 99 if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then 100 cat ${D}/${KERNEL_IMAGEDEST}/$type \ 101 $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \ 102 > $deployDir/$type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} 103 if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then 104 ln -sf $type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} \ 105 $deployDir/$type-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} 106 fi 107 if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then 108 cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \ 109 $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext \ 110 > $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} 111 if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then 112 ln -sf ${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} \ 113 $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT} 114 fi 115 fi 116 fi 117 done 118 done 119} 120