Kernel-4.18.0-80.el8_pps-gpio

Device-Tree Bindings for a PPS Signal on GPIO

These properties describe a PPS (pulse-per-second) signal connected to
a GPIO pin.

Required properties:

• compatible: should be “pps-gpio”
• gpios: one PPS GPIO in the format described by ../gpio/gpio.txt

Optional properties:

• assert-falling-edge: when present, assert is indicated by a falling edge

                   (instead of by a rising edge)
  

Example:
pps {
pinctrl-names = “default”;
pinctrl-0 = <&pinctrl_pps>;

    gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
    assert-falling-edge;

    compatible = "pps-gpio";
};