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dt-bindings: iio: adc: add binding for pac1921
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Add binging for Microchip PAC1921 Power/Current monitor

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Matteo Martelli <matteomartelli3@gmail.com>
Link: https://patch.msgid.link/20240724-iio-pac1921-v4-1-723698e903a3@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Matteo Martelli authored and Jonathan Cameron committed Aug 3, 2024
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71 changes: 71 additions & 0 deletions Documentation/devicetree/bindings/iio/adc/microchip,pac1921.yaml
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/adc/microchip,pac1921.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Microchip PAC1921 High-Side Power/Current Monitor with Anaog Output

maintainers:
- Matteo Martelli <matteomartelli3@gmail.com>

description: |
The PAC1921 is a power/current monitoring device with an analog output
and I2C/SMBus interface.
Datasheet can be found here:
https://ww1.microchip.com/downloads/en/DeviceDoc/PAC1921-Data-Sheet-DS20005293E.pdf
properties:
compatible:
const: microchip,pac1921

reg:
maxItems: 1

vdd-supply: true

"#io-channel-cells":
const: 1

shunt-resistor-micro-ohms:
description:
Value in micro Ohms of the shunt resistor connected between
the SENSE+ and SENSE- inputs, across which the current is measured.
Value is needed to compute the scaling of the measured current.

label:
description: Unique name to identify which device this is.

read-integrate-gpios:
description:
READ/INT input pin to control the current state of the device, either in
the INTEGRATE state when driven high, or in the READ state when driven low.
When not connected the pin is floating and it can be overridden by the
INT_EN register bit after asserting the READ/INT_OVR register bit.
maxItems: 1

required:
- compatible
- reg
- vdd-supply
- shunt-resistor-micro-ohms

additionalProperties: false

examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
adc@4c {
compatible = "microchip,pac1921";
reg = <0x4c>;
vdd-supply = <&vdd>;
#io-channel-cells = <1>;
label = "vbat";
shunt-resistor-micro-ohms = <10000>;
};
};
...

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