initial commit...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Makefile

@@ -0,0 +1,16 @@
+
+SERVICE_DIR := /etc/systemd/system/
+
+TIMER := thinkpad-keyboard-brightness.timer
+UNIT := thinkpad-keyboard-brightness.service
+
+
+
+.PHONY:install
+install: $(TIMER) $(UNIT)
+	cp -f $? $(SERVICE_DIR) 
+	systemctl daemon-reload
+	systemctl enamble ${UNIT}
+	systemctl enamble ${TIMER}
+	systemctl start ${TIMER}
+

thinkpad-keyboard-brightness.service

@@ -0,0 +1,12 @@
+[Unit]
+Description="Turn keyboard backlight on/off bases on light sensor"
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+Environment="SENSOR=/sys/bus/iio/devices/iio::device2/in_illuminance_raw"
+WorkingDirectory=/sys/class/leds/dell::kbd_backlight/
+ExecStart=bash -c "[[ $(cat ${SENSOR}) < 1500  ]] && echo 1 > brightness || echo 0 > brightness"
+
+[Install]
+WantedBy=multi-user.target

thinkpad-keyboard-brightness.timer

@@ -0,0 +1,11 @@
+[Unit]
+Description="Turn keyboard backlight on/off bases on light sensor (timer)"
+
+[Timer]
+AccuracySec=1s
+OnUnitActiveSec=3s
+Unit=thinkpad-keyboard-brightness.service
+
+[Install]
+WantedBy=multi-user.target
+