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dt-bindings: iio: adc: adi,ad4030: Add ADAQ4216 and ADAQ4224

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ADAQ4216 and ADAQ4224 are similar to AD4030 except that ADAQ devices have a
PGA (programmable gain amplifier) that scales the input signal prior to it
reaching the ADC inputs. The PGA is controlled through a couple of pins (A0
and A1) that set one of four possible signal gain configurations.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Marcelo Schmitt 2026-02-23 14:10:01 -03:00 committed by Jonathan Cameron
parent a98edf7de5
commit addb98c43b
1 changed files with 58 additions and 0 deletions
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58
Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
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@ -19,6 +19,8 @@ description: |
* https://www.analog.com/media/en/technical-documentation/data-sheets/ad4030-24-4032-24.pdf
* https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-24_ad4632-24.pdf
* https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-16-4632-16.pdf
* https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4216.pdf
* https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4224.pdf
$ref: /schemas/spi/spi-peripheral-props.yaml#
@ -31,6 +33,8 @@ properties:
- adi,ad4630-24
- adi,ad4632-16
- adi,ad4632-24
- adi,adaq4216
- adi,adaq4224
reg:
maxItems: 1
@ -62,6 +66,14 @@ properties:
description:
Internal buffered Reference. Used when ref-supply is not connected.
vddh-supply:
description:
PGIA Positive Power Supply.
vdd-fda-supply:
description:
FDA Positive Power Supply.
cnv-gpios:
description:
The Convert Input (CNV). It initiates the sampling conversions.
@ -72,6 +84,13 @@ properties:
The Reset Input (/RST). Used for asynchronous device reset.
maxItems: 1
pga-gpios:
description:
A0 and A1 pins for gain selection. For devices that have PGA configuration
input pins, pga-gpios should be defined.
minItems: 2
maxItems: 2
pwms:
description: PWM signal connected to the CNV pin.
maxItems: 1
@ -113,6 +132,22 @@ allOf:
properties:
spi-rx-bus-width:
maxItems: 1
# ADAQ devices require a gain property to indicate how hardware PGA is set
- if:
properties:
compatible:
contains:
pattern: ^adi,adaq
then:
required:
- vddh-supply
- vdd-fda-supply
- pga-gpios
properties:
ref-supply: false
else:
properties:
pga-gpios: false
examples:
- |
@ -154,3 +189,26 @@ examples:
reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
};
};
- |
#include <dt-bindings/gpio/gpio.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
adc@0 {
compatible = "adi,adaq4216";
reg = <0>;
spi-max-frequency = <80000000>;
vdd-5v-supply = <&supply_5V>;
vdd-1v8-supply = <&supply_1_8V>;
vio-supply = <&supply_1_8V>;
refin-supply = <&refin_sup>;
vddh-supply = <&vddh>;
vdd-fda-supply = <&vdd_fda>;
cnv-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
pga-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>,
<&gpio0 3 GPIO_ACTIVE_HIGH>;
};
};