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

   1 APM X-Gene SoC GPIO controller bindings
   2
   3 This is a gpio controller that is part of the flash controller.
   4 This gpio controller controls a total of 48 gpios.
   5
   6 Required properties:
   7 - compatible: "apm,xgene-gpio" for X-Gene GPIO controller
   8 - reg: Physical base address and size of the controller's registers
   9 - #gpio-cells: Should be two.
  10         - first cell is the pin number
  11         - second cell is used to specify the gpio polarity:
  12                 0 = active high
  13                 1 = active low
  14 - gpio-controller: Marks the device node as a GPIO controller.
  15
  16 Example:
  17         gpio0: gpio0@1701c000 {
  18                 compatible = "apm,xgene-gpio";
  19                 reg = <0x0 0x1701c000 0x0 0x40>;
  20                 gpio-controller;
  21                 #gpio-cells = <2>;
  22         };