From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- Documentation/devicetree/bindings/pps/pps-gpio.txt | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/pps/pps-gpio.txt (limited to 'Documentation/devicetree/bindings/pps/pps-gpio.txt') diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt new file mode 100644 index 000000000..9012a2a02 --- /dev/null +++ b/Documentation/devicetree/bindings/pps/pps-gpio.txt @@ -0,0 +1,30 @@ +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"; + }; -- cgit v1.2.3