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#!/bin/bash
# This script must be run after mts-io
# to read the hw-version,
# but before anything else needs the
# device tree.
sysdir=/sys/devices/platform/mts-io
i2c=/sys/bus/i2c/devices/
DEVTREE="/sys/kernel/config/device-tree/overlays/"
SYSFS="/usr/sbin/mts-io-sysfs"
install_dtbo_dir() {
for f in *.dtbo ; do
if ! [[ -f $f ]] ; then
continue
fi
if ! [[ -d ${DEVTREE} ]] ; then
mount configfs
fi
# f2 is the extracted device name
base=$(basename $f .dtbo)
/bin/mkdir ${DEVTREE}/$base || true
/bin/cat $f >${DEVTREE}/$base/dtbo
done
}
# Device tree format:
# [mach]
# [rev]
# [file1] [file2] [file3] capability
# [flag]
# [file1] [file2] [file3]
setdevtree() {
hw=$(${SYSFS} show hw-version)
mach=${hw/%-*}
rev=${hw/#*-/}
echo mach is $mach
echo rev is $rev
capd="${sysdir}/capability"
# add device tree overlays, if they exist.
[[ -d /lib/dtoverlays ]] || return 1
(
cd /lib/dtoverlays
cd ${mach}
best="-1"
for d in * ; do
if awk "BEGIN{if ($d <= $rev)exit 1}" ; then
continue
fi
if awk "BEGIN{if ($d < $best)exit 1}" ; then
best="$d"
fi
done
if [[ $best == -1 ]] ; then
# No overlay found
exit 0
fi
cd $best
install_dtbo_dir
if [[ -d capability ]] ; then
cd capability
for d in * ; do
if [[ -f ${capd}/$d ]] ; then
if (($(cat ${capd}/$d) == 1)) ; then
echo "This device has capabilithy $d"
(
cd $d
install_dtbo_dir
)
fi # Install dtbo files for a capability
fi # Does a given capability flag exist in the mts-io platform
done # Loop over all capabilities for this machine and version overlays
fi # Is there a capability directory to be installed?
)
}
case $1 in
start)
/usr/bin/logger -t "mts-io" -p daemon.info -s "Loading device tree overlay"
setdevtree
;;
stop)
echo "Not implemented"
;;
*)
echo "Usage: $0 {start|stop}"
exit 2
;;
esac
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