| Message ID | 20180423210809.29586-4-peda@axentia.se (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Apr 23, 2018 at 11:08:08PM +0200, Peter Rosin wrote: > Similar to current sense shunts, but an amplifier enables the use > of a smaller sense resistance. > > Signed-off-by: Peter Rosin <peda@axentia.se> > --- > .../bindings/iio/afe/current-sense-amplifier.txt | 26 ++++++++++++++++++++++ > MAINTAINERS | 1 + > 2 files changed, 27 insertions(+) > create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt Reviewed-by: Rob Herring <robh@kernel.org> -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, 27 Apr 2018 09:30:25 -0500 Rob Herring <robh@kernel.org> wrote: > On Mon, Apr 23, 2018 at 11:08:08PM +0200, Peter Rosin wrote: > > Similar to current sense shunts, but an amplifier enables the use > > of a smaller sense resistance. > > > > Signed-off-by: Peter Rosin <peda@axentia.se> > > --- > > .../bindings/iio/afe/current-sense-amplifier.txt | 26 ++++++++++++++++++++++ > > MAINTAINERS | 1 + > > 2 files changed, 27 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt > > Reviewed-by: Rob Herring <robh@kernel.org> > Applied Thanks, Jonathan -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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 4d534c9321de..1b23e9ebff9c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6893,6 +6893,7 @@ 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
Similar to current sense shunts, but an amplifier enables the use of a smaller sense resistance. Signed-off-by: Peter Rosin <peda@axentia.se> --- .../bindings/iio/afe/current-sense-amplifier.txt | 26 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 27 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt