blob: b2117de8050f5c0830bee287665e74fc27d07dfd [file] [log] [blame]
Patrick Williams92b42cb2022-09-03 06:53:57 -05001#
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}" ${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}