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Commit 2e9a128f authored by Peter Rosin's avatar Peter Rosin Committed by Jonathan Cameron
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dt-bindings: iio: afe: add binding for current-sense-amplifier 



Similar to current sense shunts, but an amplifier enables the use
of a smaller sense resistance.

Signed-off-by: default avatarPeter Rosin <peda@axentia.se>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent ff915802

Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt

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Current Sense Amplifier

=======================



When an io-channel measures the output voltage from a current sense

amplifier, the interesting mesaurement is almost always the current

through the sense resistor, not the voltage output. This binding

describes such a current sense circuit.



Required properties:

- compatible : "current-sense-amplifier"

- io-channels : Channel node of a voltage io-channel.

- sense-resistor-micro-ohms : The sense resistance in microohms.



Optional properties:

- sense-gain-mult: Amplifier gain multiplier. The default is <1>.

- sense-gain-div: Amplifier gain divider. The default is <1>.



Example:



sysi {

	compatible = "current-sense-amplifier";

	io-channels = <&tiadc 0>;



	sense-resistor-micro-ohms = <20000>;

	sense-gain-mul = <50>;

};

MAINTAINERS

+1 −0
Original line number Diff line number Diff line
@@ -6902,6 +6902,7 @@ IIO UNIT CONVERTER 
M:	Peter Rosin <peda@axentia.se>

L:	linux-iio@vger.kernel.org

S:	Maintained

F:	Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt

F:	Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt

F:	Documentation/devicetree/bindings/iio/afe/voltage-divider.txt