Kernel-4.18.0-80.el8_gpio_oxnas

• Oxford Semiconductor OXNAS SoC GPIO Controller

Please refer to gpio.txt for generic information regarding GPIO bindings.

Required properties:

• compatible: “oxsemi,ox810se-gpio” or “oxsemi,ox820-gpio”
• reg: Base address and length for the device.
• interrupts: The port interrupt shared by all pins.
• gpio-controller: Marks the port as GPIO controller.
• #gpio-cells: Two. The first cell is the pin number and
  the second cell is used to specify the gpio polarity as defined in
  defined in <dt-bindings/gpio/gpio.h>:
  0 = GPIO_ACTIVE_HIGH
  1 = GPIO_ACTIVE_LOW
• interrupt-controller: Marks the device node as an interrupt controller.
• #interrupt-cells: Two. The first cell is the GPIO number and second cell
  is used to specify the trigger type as defined in
  <dt-bindings/interrupt-controller/irq.h>:
  IRQ_TYPE_EDGE_RISING
  IRQ_TYPE_EDGE_FALLING
  IRQ_TYPE_EDGE_BOTH
• gpio-ranges: Interaction with the PINCTRL subsystem, it also specifies the
  gpio base and count, should be in the format of numeric-gpio-range as
  specified in the gpio.txt file.

Example:

gpio0: gpio@0 {
compatible = “oxsemi,ox810se-gpio”;
reg = <0x000000 0x100000>;
interrupts = <21>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
gpio-ranges = <&pinctrl 0 0 32>;
};

keys {
…

button-esc {
    label = "ESC";
    linux,code = <1>;
    gpios = <&gpio0 12 0>;
};

};