<h2>Edit File: 10-devicetree.install</h2><form method="post"><textarea name="content" rows="20" cols="80">#!/usr/bin/bash

# set -x

if [[ &quot;$(uname -m)&quot; == arm* || &quot;$(uname -m)&quot; == aarch64 ]]
then
COMMAND=&quot;$1&quot;
KERNEL_VERSION=&quot;$2&quot;
#BOOT_DIR_ABS=&quot;$3&quot;
#KERNEL_IMAGE=&quot;$4&quot;

[ -f /etc/u-boot.conf ] &amp;&amp; source /etc/u-boot.conf || true
[ -z &quot;$FIRMWAREDT&quot; ] || FirmwareDT=$FIRMWAREDT

if [[ $FirmwareDT == &quot;True&quot; ]]
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 -&gt; /boot/dtb-$newest_kernel_version symlink so that
# u-boot can find the correct dtb to load.
#
# If invoked to &#039;add&#039; a new kernel, find the newest based on `sort`ing
# the kernel versions dtb.  If &#039;remove&#039;, 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=&quot;$1&quot;
        for dtbdir in /boot/dtb-*; do
            dtbver=${dtbdir#*-}
            if [ &quot;$dtbver&quot; != &quot;$excluded_version&quot; ]; 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 &quot;$COMMAND&quot; in
        add)
            # If we&#039;re adding a kernel we want that version
            if [ -h /boot/dtb ]; then
                rm -f /boot/dtb
            fi
            ln -s dtb-$KERNEL_VERSION /boot/dtb
            ret=$?
            ;;
        remove)
            setup_dtb_link $KERNEL_VERSION
            ret=$?
            ;;
    esac
    exit $ret
else
    # Just exit on non ARM
    exit 0
fi
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