@@ -9,10 +9,15 @@ Required properties:
Alternatively (DEPRECATED), instead of pps-gpios above, it may have:
- gpios: one PPS GPIO as above
+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)
- capture-clear: when present, also capture the PPS clear event
+- invert-pps-echo: when present, invert the PPS ECHO pulse
Example:
pps {
@@ -23,5 +28,9 @@ Example:
assert-falling-edge;
capture-clear;
+ echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+ echo-active-ms = <100>;
+ invert-pps-echo;
+
compatible = "pps-gpio";
};