Helios64 UPS. System shutdown when battery reach 7.0V. (#2599)

* Helios64 UPS. System shutdown when battery reach 7.0V.

config/sources/families/include/rockchip64_common.inc

@@ -410,6 +410,7 @@ family_tweaks_bsp()
 		# UPS service
 		cp $SRC/packages/bsp/helios64/helios64-ups.service $destination/lib/systemd/system/
 		cp $SRC/packages/bsp/helios64/helios64-ups.timer $destination/lib/systemd/system/
+		install -m 755 $SRC/packages/bsp/helios64/helios64-ups.sh $destination/usr/bin/helios64-ups.sh
 
 	fi
 

packages/bsp/helios64/helios64-ups.service

@@ -3,4 +3,4 @@ Description=Helios64 UPS Action
 
 [Service]
 Type=oneshot
-ExecStart=/usr/sbin/poweroff
+ExecStart=/usr/bin/helios64-ups.sh

packages/bsp/helios64/helios64-ups.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+#7.0V 	916 	Recommended threshold to force shutdown system
+TH=916
+
+val=$(cat '/sys/bus/iio/devices/iio:device0/in_voltage2_raw')
+sca=$(cat '/sys/bus/iio/devices/iio:device0/in_voltage_scale')
+adc=$(echo "$val * $sca / 1" | bc)
+
+if [ "$adc" -le $TH ]; then
+	/usr/sbin/poweroff
+fi

packages/bsp/helios64/helios64-ups.timer

@@ -2,8 +2,9 @@
 Description=Helios64 UPS Shutdown timer on power loss
 
 [Timer]
-OnActiveSec=10m
+OnActiveSec=20
 AccuracySec=1s
+OnUnitActiveSec=10
 
 [Install]
 WantedBy=timers.target