Document support for EXTI trigger. STM32 ADC can use external interrupt line as trigger source for conversions.
Signed-off-by: Fabrice Gasnier <[email protected]> --- .../devicetree/bindings/iio/adc/st,stm32-adc.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt index 5dfc88e..9e4af7f 100644 --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt @@ -57,6 +57,10 @@ Optional properties: - dmas: Phandle to dma channel for this ADC instance. See ../../dma/dma.txt for details. - dma-names: Must be "rx" when dmas property is being used. +- io-triggers: Phandle to external interrupt trigger (e.g. EXTI). Must be + phandle to EXTI11 on stm32f4. See ../iio-bindings.txt for details on trigger + consumer. +- io-trigger-names: Must be "exti" when io-triggers property is being used. Example: adc: adc@40012000 { @@ -88,3 +92,20 @@ Example: ... other adc child nodes follow... }; + +Example with EXTI11 trigger: + trig: interrupt-trigger { + #io-trigger-cells = <0>; + compatible = "interrupt-trigger"; + interrupts = <11 0>; + interrupt-parent = <&gpioa>; + } + + adc: adc@40012000 { + ... + adc@0 { + ... + io-triggers = <&trig>; + io-trigger-names = "exti"; + }; + }; -- 1.9.1
