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Date: Fri, 17 Feb 2017 17:03:48 +0100 From: Fabrice Gasnier <fabrice.gasnier@...com> To: <jic23@...nel.org>, <linux@...linux.org.uk>, <robh+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>, <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org> CC: <linux-iio@...r.kernel.org>, <mark.rutland@....com>, <mcoquelin.stm32@...il.com>, <alexandre.torgue@...com>, <lars@...afoo.de>, <knaack.h@....de>, <pmeerw@...erw.net>, <fabrice.gasnier@...com>, <benjamin.gaignard@...aro.org>, <benjamin.gaignard@...com>, <linus.walleij@...aro.org> Subject: [RFC 3/4] dt-bindings: iio: add support for GPIO triggers Document Industrial I/O GPIO trigger support. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com> --- .../bindings/iio/trigger/iio-trig-gpio.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt diff --git a/Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt b/Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt new file mode 100644 index 0000000..a8dbf5c --- /dev/null +++ b/Documentation/devicetree/bindings/iio/trigger/iio-trig-gpio.txt @@ -0,0 +1,26 @@ +Industrial I/O - GPIO based trigger + +GPIOs may be used as IIO trigger provider, when trigger is connected to +GPIO lines. + +Required properties: +- compatible: Should be "iio-gpio-trigger" +- gpios: Should specify one GPIO line used as trigger source. + See Documentation/devicetree/bindings/gpio/gpio.txt +- #io-trigger-cells: Should be 0, as simple trigger provider. + See Documentation/devicetree/bindings/iio/iio-bindings.txt + +Optional properties: +- label: String to specifiy trigger name. +- gpio-trigger-rising-edge: A rising edge on GPIO will trigger. +- gpio-trigger-falling-edge: A falling edge on GPIO will trigger. + Note: Both rising and falling edge may be used. In case none of + rising or falling edge is selected, rising edge is selected by + default. + +Example: + gpiotrig0: iio-gpio-trigger0 { + #io-trigger-cells = <0>; + compatible = "iio-gpio-trigger"; + gpios = <&gpioa 11 0>; + } -- 1.9.1
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