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Date: Fri, 17 Feb 2017 17:03:46 +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 1/4] dt-bindings: iio: introduce trigger providers, consumers Document iio provider and consumer bindings. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com> --- .../devicetree/bindings/iio/iio-bindings.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/iio-bindings.txt b/Documentation/devicetree/bindings/iio/iio-bindings.txt index 68d6f8c..3125390 100644 --- a/Documentation/devicetree/bindings/iio/iio-bindings.txt +++ b/Documentation/devicetree/bindings/iio/iio-bindings.txt @@ -95,3 +95,40 @@ vdd channel is connected to output 0 of the &ref device. io-channels = <&adc 10>, <&adc 11>; io-channel-names = "adc1", "adc2"; }; + +==IIO trigger providers== +Sources of IIO triggers can be represented by any node in the device +tree. Those nodes are designated as IIO trigger providers. IIO trigger +consumer uses a phandle and an IIO trigger specifier to connect to an +IIO trigger provider. +An IIO trigger specifier is an array of one or more cells identifying +the IIO trigger output on a device. The length of an IIO trigger +specifier is defined by the value of a #io-trigger-cells property in +the IIO trigger provider node. + +Required properties: +#io-trigger-cells: + Number of cells in an IIO trigger specifier; Typically + 0 for nodes with a simple IIO trigger output. + +Example: + gpiotrig0: iio-gpio-trigger0 { + #io-trigger-cells = <0>; + compatible = "iio-gpio-trigger"; + gpios = <&gpioa 11 0>; + } + +==IIO trigger consumers== +Required properties: +- io-triggers: List of phandle representing the IIO trigger specifier. + +Optional properties: +- io-trigger-names : + List of IIO trigger name strings that matches elements + in 'io-triggers' list property. + +Example: + some_trigger_consumer { + io-triggers = <&gpiotrig0>; + io-trigger-names = "mytrig"; + } -- 1.9.1
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