Kernel-4.18.0-80.el8_gpio-aspee

Aspeed GPIO controller Device Tree Bindings

Required properties:

• compatible : Either “aspeed,ast2400-gpio” or “aspeed,ast2500-gpio”

• #gpio-cells : Should be two

          - First cell is the GPIO line number
          - Second cell is used to specify optional
            parameters (unused)
  

• reg : Address and length of the register set for the device

• gpio-controller : Marks the device node as a GPIO controller.

• interrupts : Interrupt specifier (see interrupt bindings for

          details)
  

• interrupt-controller : Mark the GPIO controller as an interrupt-controller

Optional properties:

• interrupt-parent : The parent interrupt controller, optional if inherited
• clocks : A phandle to the clock to use for debounce timings

The gpio and interrupt properties are further described in their respective
bindings documentation:

• Documentation/devicetree/bindings/gpio/gpio.txt

• Documentation/devicetree/bindings/interrupt-controller/interrupts.txt

  Example:
  gpio@1e780000 {

    #gpio-cells = <2>;
    compatible = "aspeed,ast2400-gpio";
    gpio-controller;
    interrupts = <20>;
    reg = <0x1e780000 0x1000>;
    interrupt-controller;
  

  };