Kernel-3.10.0-957.el7_mrvl-gpio

• Marvell PXA GPIO controller

Required properties:

• compatible : Should be “intel,pxa25x-gpio”, “intel,pxa26x-gpio”,

    "intel,pxa27x-gpio", "intel,pxa3xx-gpio",
    "marvell,pxa93x-gpio", "marvell,mmp-gpio" or
    "marvell,mmp2-gpio".
  

• reg : Address and length of the register set for the device
• interrupts : Should be the port interrupt shared by all gpio pins.
  There’re three gpio interrupts in arch-pxa, and they’re gpio0,
  gpio1 and gpio_mux. There’re only one gpio interrupt in arch-mmp,
  gpio_mux.
• interrupt-name : Should be the name of irq resource. Each interrupt
  binds its interrupt-name.
• interrupt-controller : Identifies the node as an interrupt controller.
• #interrupt-cells: Specifies the number of cells needed to encode an
  interrupt source.
• gpio-controller : Marks the device node as a gpio controller.
• #gpio-cells : Should be one. It is the pin number.

Example:

gpio: gpio@d4019000 {
    compatible = "marvell,mmp-gpio";
    reg = <0xd4019000 0x1000>;
    interrupts = <49>;
    interrupt-name = "gpio_mux";
    gpio-controller;
    #gpio-cells = <1>;
    interrupt-controller;
    #interrupt-cells = <1>;
  };

• Marvell Orion GPIO Controller

Required properties:

• compatible : Should be “marvell,orion-gpio”
• reg : Address and length of the register set for controller.
• gpio-controller : So we know this is a gpio controller.
• ngpio : How many gpios this controller has.
• interrupts : Up to 4 Interrupts for the controller.

Optional properties:

• mask-offset : For SMP Orions, offset for Nth CPU

Example:

    gpio0: gpio@10100 {
        compatible = "marvell,orion-gpio";
        #gpio-cells = <2>;
        gpio-controller;
        reg = <0x10100 0x40>;
        ngpio = <32>;
        interrupts = <35>, <36>, <37>, <38>;
    };