Similar to current sense shunts, but an amplifier enables the use
of a smaller sense resistance.
Signed-off-by: Peter Rosin <peda@xxxxxxxxxx>
---
.../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
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@xxxxxxxxxx>
L: linux-iio@xxxxxxxxxxxxxxx
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
--
2.11.0
--
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