Documentation/devicetree/bindings/gpio/gpio-poweroff.txt

   1 GPIO line that should be set high/low to power off a device
   2
   3 Required properties:
   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
   8   gpio to "Active High".
   9
  10 Optional properties:
  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
  14   inactive state.
  15
  16
  17 Examples:
  18
  19 gpio-poweroff {
  20         compatible = "gpio-poweroff";
  21         gpios = <&gpio 4 0>; /* GPIO 4 Active Low */
  22 };