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-rw-r--r--dts/Bindings/pps/pps-gpio.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/dts/Bindings/pps/pps-gpio.txt b/dts/Bindings/pps/pps-gpio.txt
index 3683874..9012a2a 100644
--- a/dts/Bindings/pps/pps-gpio.txt
+++ b/dts/Bindings/pps/pps-gpio.txt
@@ -7,6 +7,10 @@ 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)
@@ -19,5 +23,8 @@ Example:
gpios = <&gpio1 26 GPIO_ACTIVE_HIGH>;
assert-falling-edge;
+ echo-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
+ echo-active-ms = <100>;
+
compatible = "pps-gpio";
};