JezK
Edit File: 10-devicetree.install
#!/usr/bin/bash # set -x if [[ "$(uname -m)" == arm* || "$(uname -m)" == aarch64 ]] then COMMAND="$1" KERNEL_VERSION="$2" #BOOT_DIR_ABS="$3" #KERNEL_IMAGE="$4" [ -f /etc/u-boot.conf ] && source /etc/u-boot.conf || true [ -z "$FIRMWAREDT" ] || FirmwareDT=$FIRMWAREDT if [[ $FirmwareDT == "True" ]] then # if we want to use firmware DT we remove symlink to current kernel DT if [ -h /boot/dtb ]; then rm -f /boot/dtb fi exit 0 fi # Setup a /boot/dtb -> /boot/dtb-$newest_kernel_version symlink so that # u-boot can find the correct dtb to load. # # If invoked to 'add' a new kernel, find the newest based on `sort`ing # the kernel versions dtb. If 'remove', then follow basically the same # procedure but exclude the version currently being removed. # # The theory of operation here is that, while newer kernels may add new # dtb nodes and fields, as upstreaming hw support for some particular # device progresses, it should never make backward incompatible changes. # So it should always be safe to use a newer dtb with an older kernel. list_dtb_versions() { excluded_version="$1" for dtbdir in /boot/dtb-*; do dtbver=${dtbdir#*-} if [ "$dtbver" != "$excluded_version" ]; then echo $dtbver fi done } setup_dtb_link() { ver=`list_dtb_versions $1 | sort -r --sort=version | head -1` if [ -h /boot/dtb ]; then rm -f /boot/dtb fi ln -s dtb-$ver /boot/dtb } ret=0 case "$COMMAND" in add) # If we're adding a kernel we want that version if [ -h /boot/dtb ]; then rm -f /boot/dtb fi ln -s dtb-$KERNEL_VERSION /boot/dtb ret=$? ;; remove) setup_dtb_link $KERNEL_VERSION ret=$? ;; esac exit $ret else # Just exit on non ARM exit 0 fi