Documentation/devicetree/bindings/gpio/gpio-ath79.txt

   1 Binding for Qualcomm Atheros AR7xxx/AR9xxx GPIO controller
   2
   3 Required properties:
   4 - compatible: has to be "qca,<soctype>-gpio" and one of the following
   5   fallbacks:
   6   - "qca,ar7100-gpio"
   7   - "qca,ar9340-gpio"
   8 - reg: Base address and size of the controllers memory area
   9 - gpio-controller : Marks the device node as a GPIO controller.
  10 - #gpio-cells : Should be two. The first cell is the pin number and the
  11   second cell is used to specify optional parameters.
  12 - ngpios: Should be set to the number of GPIOs available on the SoC.
  13
  14 Optional properties:
  15 - interrupt-parent: phandle of the parent interrupt controller.
  16 - interrupts: Interrupt specifier for the controllers interrupt.
  17 - interrupt-controller : Identifies the node as an interrupt controller
  18 - #interrupt-cells : Specifies the number of cells needed to encode interrupt
  19                      source, should be 2
  20
  21 Please refer to interrupts.txt in this directory for details of the common
  22 Interrupt Controllers bindings used by client devices.
  23
  24 Example:
  25
  26         gpio@18040000 {
  27                 compatible = "qca,ar9132-gpio", "qca,ar7100-gpio";
  28                 reg = <0x18040000 0x30>;
  29                 interrupts = <2>;
  30
  31                 ngpios = <22>;
  32
  33                 gpio-controller;
  34                 #gpio-cells = <2>;
  35
  36                 interrupt-controller;
  37                 #interrupt-cells = <2>;
  38         };