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# SPDX-License-Identifier: (GPL-
2.
0 OR BSD-
2-Clause)
# Copyright
2025 Analog Devices Inc.
%YAML
1.
2
---
$id:
http://devicetree.org/schemas/iio/adc/adi,ad7191.yaml#
$schema:
http://devicetree.org/meta-schemas/core.yaml#
title: Analog Devices AD7191 ADC
maintainers:
- Alisa-Dariana Roman <alisa.roman@analog.com>
description: |
Bindings for the Analog Devices AD7191 ADC device. Datasheet can be
found here:
https://www.analog.com/media/en/technical-documentation/data-sheets/AD7191.pdf
The device's PDOWN pin must be connected to the SPI controller's chip select
pin.
properties:
compatible:
enum:
- adi,ad7191
reg:
maxItems:
1
spi-cpol: true
spi-cpha: true
clocks:
maxItems:
1
description:
Must be present when CLKSEL pin is tied HIGH to select external clock
source (either a crystal between MCLK1 and MCLK2 pins, or a
CMOS-compatible clock driving MCLK2 pin). Must be absent when CLKSEL pin
is tied LOW to use the internal
4.
92MHz clock.
interrupts:
maxItems:
1
avdd-supply:
description: AVdd voltage supply
dvdd-supply:
description: DVdd voltage supply
vref-supply:
description: Vref voltage supply
odr-gpios:
description:
ODR1 and ODR2 pins for output data rate selection. Should be defined if
adi,odr-value is absent.
minItems:
2
maxItems:
2
adi,odr-value:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Should be present if ODR pins are pin-strapped. Possible values:
120 Hz (ODR1=
0, ODR2=
0)
60 Hz (ODR1=
0, ODR2=
1)
50 Hz (ODR1=
1, ODR2=
0)
10 Hz (ODR1=
1, ODR2=
1)
If defined, odr-gpios must be absent.
enum: [
120,
60,
50,
10]
pga-gpios:
description:
PGA1 and PGA2 pins for gain selection. Should be defined if adi,pga-value
is absent.
minItems:
2
maxItems:
2
adi,pga-value:
$ref: /schemas/types.yaml#/definitions/uint32
description: |
Should be present if PGA pins are pin-strapped. Possible values:
Gain
1 (PGA1=
0, PGA2=
0)
Gain
8 (PGA1=
0, PGA2=
1)
Gain
64 (PGA1=
1, PGA2=
0)
Gain
128 (PGA1=
1, PGA2=
1)
If defined, pga-gpios must be absent.
enum: [
1,
8,
64,
128]
temp-gpios:
description: TEMP pin for temperature sensor enable.
maxItems:
1
chan-gpios:
description: CHAN pin for input channel selection.
maxItems:
1
required:
- compatible
- reg
- interrupts
- avdd-supply
- dvdd-supply
- vref-supply
- spi-cpol
- spi-cpha
- temp-gpios
- chan-gpios
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
- oneOf:
- required:
- adi,odr-value
- required:
- odr-gpios
- oneOf:
- required:
- adi,pga-value
- required:
- pga-gpios
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <
1>;
#size-cells = <
0>;
adc@
0 {
compatible = "adi,ad7191";
reg = <
0>;
spi-max-frequency = <
1000000>;
spi-cpol;
spi-cpha;
clocks = <&ad7191_mclk>;
interrupts = <
25 IRQ_TYPE_EDGE_FALLING>;
interrupt-parent = <&gpio>;
avdd-supply = <&avdd>;
dvdd-supply = <&dvdd>;
vref-supply = <&vref>;
adi,pga-value = <
1>;
odr-gpios = <&gpio
23 GPIO_ACTIVE_HIGH>, <&gpio
24 GPIO_ACTIVE_HIGH>;
temp-gpios = <&gpio
22 GPIO_ACTIVE_HIGH>;
chan-gpios = <&gpio
27 GPIO_ACTIVE_HIGH>;
};
};