#!/bin/sh
# Pre-t1 discharge (board on battery): N x `yes`, stop when VADC VBAT <= VMIN uV (3 samples in a row), PMIC > 55 C, or after MAX s. Writes /tmp only.
N=${1:-4}; MAX=${2:-5400}; VMIN=${3:-3880000}; L=/tmp/b10b3t-dis.log; low=0; D=/sys/bus/iio/devices/iio:device0
trap '' HUP
C=/sys/class/power_supply/pm8916-lbc-chgr/online; echo "WAIT-USB-OFF up=$(cut -d" " -f1 /proc/uptime)" >> $L; while [ "$(cat $C)" != 0 ]; do sleep 2; done; echo "USB-OFF up=$(cut -d" " -f1 /proc/uptime)" >> $L
t0=$(cut -d. -f1 /proc/uptime); P=""
for i in $(seq 1 $N); do yes > /dev/null & P="$P $!"; done
echo "LOAD-START up=$t0 n=$N pids=$P" >> $L
why=timeout
while :; do
  t=$(cut -d. -f1 /proc/uptime); vb=$(cat $D/in_voltage6_input); pt=$(cat $D/in_temp8_input)
  echo "L up=$t vbat6=$vb pmt=$pt" >> $L
  [ "$pt" -gt 55000 ] && { why=pmic-55C; break; }
  if [ "$vb" -le $VMIN ]; then low=$((low + 1)); else low=0; fi; [ $low -ge 3 ] && { why=vbat-reached-VMIN; break; }
  [ $((t - t0)) -ge $MAX ] && break
  sleep 10
done
kill $P; echo "LOAD-STOP up=$(cut -d' ' -f1 /proc/uptime) reason=$why" >> $L