Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt

   1 * Freescale i.MX/MXC GPIO controller
   2
   3 Required properties:
   4 - compatible : Should be "fsl,<soc>-gpio"
   5 - reg : Address and length of the register set for the device
   6 - interrupts : Should be the port interrupt shared by all 32 pins, if
   7   one number.  If two numbers, the first one is the interrupt shared
   8   by low 16 pins and the second one is for high 16 pins.
   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
  11   the second cell is used to specify the gpio polarity:
  12       0 = active high
  13       1 = active low
  14 - interrupt-controller: Marks the device node as an interrupt controller.
  15 - #interrupt-cells : Should be 2.  The first cell is the GPIO number.
  16   The second cell bits[3:0] is used to specify trigger type and level flags:
  17       1 = low-to-high edge triggered.
  18       2 = high-to-low edge triggered.
  19       4 = active high level-sensitive.
  20       8 = active low level-sensitive.
  21
  22 Example:
  23
  24 gpio0: gpio@73f84000 {
  25         compatible = "fsl,imx51-gpio", "fsl,imx35-gpio";
  26         reg = <0x73f84000 0x4000>;
  27         interrupts = <50 51>;
  28         gpio-controller;
  29         #gpio-cells = <2>;
  30         interrupt-controller;
  31         #interrupt-cells = <2>;
  32 };