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", " ${KERNEL_PACKAGE_NAME}-image-zimage-bundle")
13}
14
15# recursivly search for devicetree files
16FILES:${KERNEL_PACKAGE_NAME}-devicetree = " \
17    /${KERNEL_DTBDEST}/**/*.dtb \
18    /${KERNEL_DTBDEST}/**/*.dtbo \
19"
20
21FILES:${KERNEL_PACKAGE_NAME}-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
22
23# Generate kernel+devicetree bundle
24KERNEL_DEVICETREE_BUNDLE ?= "0"
25
26# dtc flags passed via DTC_FLAGS env variable
27KERNEL_DTC_FLAGS ?= ""
28
29normalize_dtb () {
30	dtb="$1"
31	if echo $dtb | grep -q '/dts/'; then
32		bbwarn "$dtb contains the full path to the the dts file, but only the dtb name should be used."
33		dtb=`basename $dtb | sed 's,\.dts$,.dtb,g'`
34	fi
35	echo "$dtb"
36}
37
38get_real_dtb_path_in_kernel () {
39	dtb="$1"
40	dtb_path="${B}/arch/${ARCH}/boot/dts/$dtb"
41	if [ ! -e "$dtb_path" ]; then
42		dtb_path="${B}/arch/${ARCH}/boot/$dtb"
43	fi
44	echo "$dtb_path"
45}
46
47do_configure:append() {
48	if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
49		if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
50			case "${ARCH}" in
51				"arm")
52				config="${B}/.config"
53				if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
54					bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
55					sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
56					echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
57					echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
58				fi
59				;;
60				*)
61				bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
62			esac
63		else
64			bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
65		fi
66	fi
67}
68
69do_compile:append() {
70	if [ -n "${KERNEL_DTC_FLAGS}" ]; then
71		export DTC_FLAGS="${KERNEL_DTC_FLAGS}"
72	fi
73
74	for dtbf in ${KERNEL_DEVICETREE}; do
75		dtb=`normalize_dtb "$dtbf"`
76		oe_runmake $dtb CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" OBJCOPY="${KERNEL_OBJCOPY}" STRIP="${KERNEL_STRIP}" ${KERNEL_EXTRA_ARGS}
77	done
78}
79
80do_install:append() {
81	install -d ${D}/${KERNEL_DTBDEST}
82	for dtbf in ${KERNEL_DEVICETREE}; do
83		dtb=`normalize_dtb "$dtbf"`
84		dtb_path=`get_real_dtb_path_in_kernel "$dtb"`
85		if "${@'false' if oe.types.boolean(d.getVar('KERNEL_DTBVENDORED')) else 'true'}"; then
86			dtb_ext=${dtb##*.}
87			dtb_base_name=`basename $dtb .$dtb_ext`
88			dtb=$dtb_base_name.$dtb_ext
89		fi
90		install -Dm 0644 $dtb_path ${D}/${KERNEL_DTBDEST}/$dtb
91	done
92}
93
94do_deploy:append() {
95	for dtbf in ${KERNEL_DEVICETREE}; do
96		dtb=`normalize_dtb "$dtbf"`
97		dtb_ext=${dtb##*.}
98		dtb_base_name=`basename $dtb .$dtb_ext`
99		install -d $deployDir
100		if "${@'false' if oe.types.boolean(d.getVar('KERNEL_DTBVENDORED')) else 'true'}"; then
101			dtb=$dtb_base_name.$dtb_ext
102		fi
103		install -m 0644 ${D}/${KERNEL_DTBDEST}/$dtb $deployDir/$dtb_base_name.$dtb_ext
104		if [ -n "${KERNEL_DTB_NAME}" ] ; then
105			ln -sf $dtb_base_name.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext
106		fi
107		if [ -n "${KERNEL_DTB_LINK_NAME}" ] ; then
108			ln -sf $dtb_base_name.$dtb_ext $deployDir/$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext
109		fi
110		for type in ${KERNEL_IMAGETYPE_FOR_MAKE}; do
111			if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
112				cat ${D}/${KERNEL_IMAGEDEST}/$type \
113					$deployDir/$dtb_base_name.$dtb_ext \
114					> $deployDir/$type-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT}
115				if [ -n "${KERNEL_DTB_NAME}" ]; then
116					ln -sf $type-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT} \
117						$deployDir/$type-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
118				fi
119				if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then
120					ln -sf $type-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT} \
121						$deployDir/$type-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
122				fi
123				if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
124					cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
125						$deployDir/$dtb_base_name.$dtb_ext \
126						>  $deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT}
127					if [ -n "${KERNEL_DTB_NAME}" ]; then
128						ln -sf ${type}-${INITRAMFS_NAME}-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT} \
129							$deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
130					fi
131					if [ -n "${KERNEL_DTB_LINK_NAME}" ]; then
132						ln -sf ${type}-${INITRAMFS_NAME}-$dtb_base_name.$dtb_ext${KERNEL_DTB_BIN_EXT} \
133							$deployDir/${type}-${INITRAMFS_NAME}-$dtb_base_name-${KERNEL_DTB_LINK_NAME}.$dtb_ext${KERNEL_DTB_BIN_EXT}
134					fi
135				fi
136			fi
137		done
138	done
139}
140