diff options
| author | Peter Rosin <peda@axentia.se> | 2018-04-23 23:08:08 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-04-28 18:01:39 +0100 |
| commit | 2e9a128f359c1baa8f0fbfdb95a1b40f84244801 (patch) | |
| tree | 3b01c4501421c4fdcd5e91f4bee1404045f26b95 | |
| parent | ff915802fb7f2bb2fa9890cb88dab9cdabb466b8 (diff) | |
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: Peter Rosin <peda@axentia.se>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt | 26 | ||||
| -rw-r--r-- | MAINTAINERS | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt b/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt new file mode 100644 index 000000000000..0ddbaebba8ce --- /dev/null +++ b/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt @@ -0,0 +1,26 @@ +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>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index 35987f60649b..d1c0f58cf8a0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -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 |