FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pps/pps-gpio.txt

     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
     
    Additional required properties for the PPS ECHO functionality:
    - echo-gpios: one PPS ECHO GPIO in the format described by ../gpio/gpio.txt
    - echo-active-ms: duration in ms of the active portion of the echo pulse
    
    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;
    
                    echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
                    echo-active-ms = <100>;
    
                    compatible = "pps-gpio";
            };

Cache object: 22c69fcf77fb28f652dfcfd84e69e414