1 GPIO line that should be set high/low to power off a device
4 - compatible : should be "gpio-poweroff".
5 - gpios : The GPIO to set high/low, see "gpios property" in
6 Documentation/devicetree/bindings/gpio/gpio.txt. If the pin should be
7 low to power down the board set it to "Active Low", otherwise set
11 - input : Initially configure the GPIO line as an input. Only reconfigure
12 it to an output when the pm_power_off function is called. If this optional
13 property is not specified, the GPIO is initialized as an output in its
20 compatible = "gpio-poweroff";
21 gpios = <&gpio 4 0>; /* GPIO 4 Active Low */