| # Copyright 2023 The ChromiumOS Authors |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: | |
| When an io-channel measures the voltage over a current sense amplifier, |
| the interesting measurement is almost always the current through the |
| sense resistor, not the voltage over it. This binding describes such a current |
| sense circuit. |
| |
| This is based on Linux, documentation: |
| https://www.kernel.org/doc/Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.yaml |
| |
| compatible: "current-sense-amplifier" |
| |
| include: base.yaml |
| |
| properties: |
| io-channels: |
| required: true |
| description: | |
| Channels available with this divider configuration. |
| |
| sense-resistor-milli-ohms: |
| type: int |
| required: true |
| description: | |
| Resistance of the shunt resistor in milli-ohms. |
| |
| sense-gain-mult: |
| type: int |
| default: 1 |
| description: | |
| Amplifier gain multiplier. The default is <1>. The maximum value is <65535>. |
| |
| sense-gain-div: |
| type: int |
| default: 1 |
| description: | |
| Amplifier gain divider. The default is <1>. The maximum value is <65535>. |
| |
| power-gpios: |
| type: phandle-array |
| description: | |
| Control power to the current amplifier. |
| |
| If present the corresponding GPIO must be set to an active level |
| to enable the current amplifier. |
