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| author | Tom Rini <trini@konsulko.com> | 2024-02-29 12:33:36 -0500 |
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| committer | Tom Rini <trini@konsulko.com> | 2024-02-29 12:33:36 -0500 |
| commit | 53633a893a06bd5a0c807287d9cc29337806eaf7 (patch) | |
| tree | 3d1092c556e3be208de2328232c29725970c6edc /Bindings/iio/afe/current-sense-shunt.yaml | |
| download | u-boot-53633a893a06bd5a0c807287d9cc29337806eaf7.zip u-boot-53633a893a06bd5a0c807287d9cc29337806eaf7.tar.gz u-boot-53633a893a06bd5a0c807287d9cc29337806eaf7.tar.bz2 | |
Squashed 'dts/upstream/' content from commit aaba2d45dc2a
git-subtree-dir: dts/upstream
git-subtree-split: aaba2d45dc2a1b3bbb710f2a3808ee1c9f340abe
Diffstat (limited to 'Bindings/iio/afe/current-sense-shunt.yaml')
| -rw-r--r-- | Bindings/iio/afe/current-sense-shunt.yaml | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/Bindings/iio/afe/current-sense-shunt.yaml b/Bindings/iio/afe/current-sense-shunt.yaml new file mode 100644 index 0000000..f8a112c --- /dev/null +++ b/Bindings/iio/afe/current-sense-shunt.yaml @@ -0,0 +1,68 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/afe/current-sense-shunt.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Current Sense Shunt + +maintainers: + - Peter Rosin <peda@axentia.se> + +description: | + When an io-channel measures the voltage over a current sense shunt, + the interesting measurement is almost always the current through the + shunt, not the voltage over it. This binding describes such a current + sense circuit. + +properties: + compatible: + const: current-sense-shunt + + io-channels: + maxItems: 1 + description: | + Channel node of a voltage io-channel. + + "#io-channel-cells": + const: 0 + + shunt-resistor-micro-ohms: + description: The shunt resistance. + +required: + - compatible + - io-channels + - shunt-resistor-micro-ohms + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + tiadc: adc@48 { + compatible = "ti,ads1015"; + reg = <0x48>; + #io-channel-cells = <1>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { /* IN0,IN1 differential */ + reg = <0>; + ti,gain = <1>; + ti,datarate = <4>; + }; + }; + }; + sysi { + compatible = "current-sense-shunt"; + io-channels = <&tiadc 0>; + #io-channel-cells = <0>; + + /* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */ + shunt-resistor-micro-ohms = <3300000>; + }; +... |