From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Burkart Subject: [PATCH v14 2/3] dt-bindings: pps: pps-gpio PPS ECHO implementation Date: Sun, 30 Dec 2018 19:33:32 +1100 Message-ID: <20181230083333.27210-3-tom@aussec.com> References: <20181230083333.27210-1-tom@aussec.com> <20181230083333.27210-2-tom@aussec.com> Return-path: In-Reply-To: <20181230083333.27210-2-tom@aussec.com> Sender: linux-kernel-owner@vger.kernel.org To: Linux kernel mailing list Cc: Tom Burkart , devicetree@vger.kernel.org, Rodolfo Giometti , Ricardo Martins , James Nuss , Lukas Senger List-Id: devicetree@vger.kernel.org This patch implements the device tree binding changes required for the pps echo functionality for pps-gpio, that sysfs claims is available already. This patch was originally written by Lukas Senger as part of a masters thesis project and modified for inclusion into the linux kernel by Tom Burkart. Reviewed-by: Rob Herring Signed-off-by: Lukas Senger Signed-off-by: Tom Burkart --- Documentation/devicetree/bindings/pps/pps-gpio.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/pps/pps-gpio.txt b/Documentation/devicetree/bindings/pps/pps-gpio.txt index 3683874832ae..9012a2a02e14 100644 --- a/Documentation/devicetree/bindings/pps/pps-gpio.txt +++ b/Documentation/devicetree/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"; }; -- 2.12.3