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64 lines
1.5 KiB
64 lines
1.5 KiB
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/iio/afe/current-sense-shunt.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Current Sense Shunt |
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maintainers: |
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- Peter Rosin <[email protected]> |
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description: | |
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When an io-channel measures the voltage over a current sense shunt, |
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the interesting measurement is almost always the current through the |
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shunt, not the voltage over it. This binding describes such a current |
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sense circuit. |
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properties: |
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compatible: |
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const: current-sense-shunt |
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io-channels: |
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maxItems: 1 |
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description: | |
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Channel node of a voltage io-channel. |
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shunt-resistor-micro-ohms: |
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description: The shunt resistance. |
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required: |
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- compatible |
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- io-channels |
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- shunt-resistor-micro-ohms |
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additionalProperties: false |
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examples: |
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- | |
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i2c { |
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#address-cells = <1>; |
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#size-cells = <0>; |
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tiadc: adc@48 { |
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compatible = "ti,ads1015"; |
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reg = <0x48>; |
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#io-channel-cells = <1>; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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channel@0 { /* IN0,IN1 differential */ |
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reg = <0>; |
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ti,gain = <1>; |
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ti,datarate = <4>; |
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}; |
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}; |
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}; |
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sysi { |
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compatible = "current-sense-shunt"; |
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io-channels = <&tiadc 0>; |
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/* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */ |
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shunt-resistor-micro-ohms = <3300000>; |
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}; |
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...
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