This is a current sense amplifier from Analog Devices. Signed-off-by: Peter Rosin <peda@xxxxxxxxxx> --- .../devicetree/bindings/iio/afe/adi,lt6106.txt | 50 ++++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt diff --git a/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt new file mode 100644 index 000000000000..98b6d93596f2 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt @@ -0,0 +1,50 @@ +LT6106 36V High Side Current Sence Amplifier +============================================ + +This binding assumes the typical application of the current sense amplifier +as described in the LT6106 datasheet. + +http://www.analog.com/media/en/technical-documentation/data-sheets/6106fb.pdf + + .------. + Vin --------------------+--------------+-|Rsense|-+-----. + | | '------' | | + | | | .---. + .--------------------. .---. | | L | + | V+ | |Rin| | | O | + | | '---' | | A | + | | | | | D | + | -IN |----' | '---' + Vout ---+----| OUT LT6106 | | | + | | +IN |---------------' GND + .----. | | + |Rout| | | + '----' | V- | + | '--------------------' + | | + GND GND + +The voltage Vsense over Rsense is measured by looking at Vout. They +are related as Vout = Vsense * Rout / Rin. The current Isense through +Rsense is (almost) the same as that through the LOAD. Hence, the +interesting LOAD current can be calculated as + + Vout * Rin / (Rout * Rsense) + +Required properties: +- compatible : "adi,lt6106" +- io-channels : Channel node of an io-channel measuring Vout. +- sense-resistor-micro-ohms : The Rsense resistance in microohms. +- input-resistor-ohms : The Rin resistance in ohms. +- output-resistor-ohms : The Rout resistance in ohms. + +Example: + +sysi { + compatible = "adi,lt6106"; + io-channels = <&tiadc 0>; + + sense-resistor-micro-ohms = <20000>; + input-resistor-ohms = <200>; + output-resistor-ohms = <10000>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index 21368749f3b0..76d1e03f350a 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/adi,lt6106.txt F: Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt F: Documentation/devicetree/bindings/iio/afe/voltage-divider.txt F: drivers/iio/afe/iio-unit-converter.c -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
