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Diffstat (limited to 'classes/toradex-devicetree.bbclass')
-rw-r--r-- | classes/toradex-devicetree.bbclass | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/classes/toradex-devicetree.bbclass b/classes/toradex-devicetree.bbclass new file mode 100644 index 0000000..4deb850 --- /dev/null +++ b/classes/toradex-devicetree.bbclass @@ -0,0 +1,88 @@ +# Toradex devicetree.bbclass extension +# +# This bbclass extends OE's devicetree.bbclass by implementing devicetree +# overlays compilation for Toradex BSPs. +# +# A overlays.txt file is generated in ${DEPLOY_DIR_IMAGE}, with a uboot +# environment variable 'fdt_overlays' containing the devicetree overlays +# to be applied to the boot devicetree at runtime. +# +# The following options are supported: +# +# TEZI_EXTERNAL_KERNEL_DEVICETREE = "a-overlay.dtbo another_overlay.dtbo" +# +# The devicetree overlays to be deployed +# to ${DEPLOY_DIR_IMAGE}/overlays, if not +# set, all common and machine related +# overlays would be deployed. +# +# TEZI_EXTERNAL_KERNEL_DEVICETREE_BOOT = "a-overlay.dtbo" +# +# The devicetree overlays to be applied at +# runtime, will be written to: +# ${DEPLOY_DIR_IMAGE}/overlays.txt, if not +# set, no overlays would be applied. +# +# Copyright 2021 (C) Toradex AG + +TEZI_EXTERNAL_KERNEL_DEVICETREE ??= "" +TEZI_EXTERNAL_KERNEL_DEVICETREE_BOOT ??= "" + +SUMMARY = "Toradex BSP device tree overlays" + +SRC_URI = "git://git.toradex.com/device-tree-overlays.git;branch=${SRCBRANCH};protocol=https" + +PV = "${SRCBRANCH}+git${SRCPV}" + +inherit devicetree + +S = "${WORKDIR}/git/overlays" +DT_FILES_PATH = "${WORKDIR}/machine-overlays" + +# The machine specific recipes start with MACHINE_PREFIX}[_-] +MACHINE_PREFIX = "${MACHINE}" +MACHINE_PREFIX_colibri-imx7-emmc = "colibri-imx7" +MACHINE_PREFIX_apalis-imx8x-v11a = "apalis-imx8x" +MACHINE_PREFIX_colibri-imx8x-v10b = "colibri-imx8x" + +do_collect_overlays () { + if [ -z "${TEZI_EXTERNAL_KERNEL_DEVICETREE}" ] ; then + machine_dts=`cd ${S} && ls ${MACHINE_PREFIX}[_-]*.dts 2>/dev/null || true` + common_dts=`cd ${S} && ls *.dts 2>/dev/null | grep -v -e 'imx[6-8]' -e 'tk1' | xargs || true` + all_dts="$machine_dts $common_dts" + else + for dtbo in ${TEZI_EXTERNAL_KERNEL_DEVICETREE}; do + dtbo_ext=${dtbo##*.} + dts="`basename $dtbo .$dtbo_ext`.dts" + all_dts="$all_dts $dts" + done + fi + + for dts in $all_dts; do + cp ${S}/$dts ${DT_FILES_PATH} + done +} +do_collect_overlays[dirs] = "${DT_FILES_PATH}" +do_collect_overlays[cleandirs] = "${DT_FILES_PATH}" + +addtask collect_overlays after do_patch before do_configure + +do_deploy_append () { + install -d ${DEPLOYDIR}/overlays + if [ -d ${DEPLOYDIR}/devicetree ]; then + cp ${DEPLOYDIR}/devicetree/* ${DEPLOYDIR}/overlays + else + touch ${DEPLOYDIR}/overlays/none_deployed + fi + + # overlays that we want to be applied during boot time + overlays= + for dtbo in ${TEZI_EXTERNAL_KERNEL_DEVICETREE_BOOT}; do + if [ ! -e ${DEPLOYDIR}/overlays/$dtbo ]; then + bbfatal "$dtbo is not installed in your boot filesystem, please make sure it's in TEZI_EXTERNAL_KERNEL_DEVICETREE or being provided by virtual/dtb." + fi + overlays="$overlays $dtbo" + done + + echo "fdt_overlays=$(echo $overlays)" > ${DEPLOYDIR}/overlays.txt +} |