Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt

   1 * Renesas R-Car GPIO Controller
   2
   3 Required Properties:
   4
   5   - compatible: should be one of the following.
   6     - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO controller.
   7     - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO controller.
   8     - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO controller.
   9     - "renesas,gpio-rcar": for generic R-Car GPIO controller.
  10
  11   - reg: Base address and length of each memory resource used by the GPIO
  12     controller hardware module.
  13
  14   - interrupt-parent: phandle of the parent interrupt controller.
  15   - interrupts: Interrupt specifier for the controllers interrupt.
  16
  17   - gpio-controller: Marks the device node as a gpio controller.
  18   - #gpio-cells: Should be 2. The first cell is the GPIO number and the second
  19     cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
  20     GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
  21   - gpio-ranges: Range of pins managed by the GPIO controller.
  22
  23 Please refer to gpio.txt in this directory for details of gpio-ranges property
  24 and the common GPIO bindings used by client devices.
  25
  26 Example: R8A7779 (R-Car H1) GPIO controller nodes
  27
  28         gpio0: gpio@ffc40000 {
  29                 compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
  30                 reg = <0xffc40000 0x2c>;
  31                 interrupt-parent = <&gic>;
  32                 interrupts = <0 141 0x4>;
  33                 #gpio-cells = <2>;
  34                 gpio-controller;
  35                 gpio-ranges = <&pfc 0 0 32>;
  36         };
  37         ...
  38         gpio6: gpio@ffc46000 {
  39                 compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
  40                 reg = <0xffc46000 0x2c>;
  41                 interrupt-parent = <&gic>;
  42                 interrupts = <0 147 0x4>;
  43                 #gpio-cells = <2>;
  44                 gpio-controller;
  45                 gpio-ranges = <&pfc 0 192 9>;
  46         };