Commit e778aa14 authored by Peter Rosin's avatar Peter Rosin Committed by Jonathan Cameron
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dt-bindings: iio: document envelope-detector bindings 



Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarPeter Rosin <peda@axentia.se>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 7fde1484

Documentation/devicetree/bindings/iio/adc/envelope-detector.txt

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Bindings for ADC envelope detector using a DAC and a comparator



The DAC is used to find the peak level of an alternating voltage input

signal by a binary search using the output of a comparator wired to

an interrupt pin. Like so:

                          _

                         | \

    input +------>-------|+ \

                         |   \

           .-------.     |    }---.

           |       |     |   /    |

           |    dac|-->--|- /     |

           |       |     |_/      |

           |       |              |

           |       |              |

           |    irq|------<-------'

           |       |

           '-------'



Required properties:

- compatible: Should be "axentia,tse850-envelope-detector"

- io-channels: Channel node of the dac to be used for comparator input.

- io-channel-names: Should be "dac".

- interrupt specification for one client interrupt,

  see ../../interrupt-controller/interrupts.txt for details.

- interrupt-names: Should be "comp".



Example:



	&i2c {

		dpot: mcp4651-104@28 {

			compatible = "microchip,mcp4651-104";

			reg = <0x28>;

			#io-channel-cells = <1>;

		};

	};



	dac: dac {

		compatible = "dpot-dac";

		vref-supply = <&reg_3v3>;

		io-channels = <&dpot 0>;

		io-channel-names = "dpot";

		#io-channel-cells = <1>;

	};



	envelope-detector {

		compatible = "axentia,tse850-envelope-detector";

		io-channels = <&dac 0>;

		io-channel-names = "dac";



		interrupt-parent = <&gpio>;

		interrupts = <3 IRQ_TYPE_EDGE_FALLING>;

		interrupt-names = "comp";

	};

MAINTAINERS

+6 −0
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@@ -6127,6 +6127,12 @@ F: Documentation/ABI/testing/sysfs-bus-iio-dac-dpot-dac 
F:	Documentation/devicetree/bindings/iio/dac/dpot-dac.txt

F:	drivers/iio/dac/dpot-dac.c



IIO ENVELOPE DETECTOR

M:	Peter Rosin <peda@axentia.se>

L:	linux-iio@vger.kernel.org

S:	Maintained

F:	Documentation/devicetree/bindings/iio/adc/envelope-detector.txt



IIO SUBSYSTEM AND DRIVERS

M:	Jonathan Cameron <jic23@kernel.org>

R:	Hartmut Knaack <knaack.h@gmx.de>