4 - compatible: Should contain one of the following:
5 * "rockchip,ec-battery"
6 - reg: integer, smbus address of the device.
7 - tvirtual_power: integer, test power, if battery is not exist;
8 - monitor_sec: integer, delay time of queue_delayed_work (s);
15 ec_battery: ec_battery09 {
16 compatible = "rockchip,ec-battery";