On Sat, Apr 13, 2024 at 10:13 AM Alisa-Dariana Roman
<alisadariana@xxxxxxxxx> wrote:
>
> Unlike the other AD719Xs, AD7194 has configurable differential
> channels. The user can dynamically configure them in the devicetree.
>
> Also add an example for AD7194 devicetree.
>
> Signed-off-by: Alisa-Dariana Roman <alisa.roman@xxxxxxxxxx>
> ---
> .../bindings/iio/adc/adi,ad7192.yaml | 74 +++++++++++++++++++
> 1 file changed, 74 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> index ba506af3b73e..855f0a2d7d75 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> @@ -21,8 +21,15 @@ properties:
> - adi,ad7190
> - adi,ad7192
> - adi,ad7193
> + - adi,ad7194
> - adi,ad7195
>
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 0
> +
> reg:
> maxItems: 1
>
> @@ -104,8 +111,43 @@ required:
> - spi-cpol
> - spi-cpha
>
> +patternProperties:
> + "^channel@[0-9]+$":
> + type: object
> + $ref: adc.yaml
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + description: The channel index.
> + minimum: 1
> + maximum: 256
> +
> + diff-channels:
> + description: |
> + Both inputs can be connected to pins AIN1 to AIN16 by choosing the
> + appropriate value from 1 to 16.
> + items:
> + minimum: 1
> + maximum: 16
Don't we also need to allow 0 for AINCOM here? Or is this property
only for fully differential pairs and not pseudo-differential pairs?
> +
> + required:
> + - reg
> + - diff-channels
> +
> allOf:
> - $ref: /schemas/spi/spi-peripheral-props.yaml#
> + - if:
> + properties:
> + compatible:
> + enum:
> + - adi,ad7190
> + - adi,ad7192
> + - adi,ad7193
> + - adi,ad7195
> + then:
> + patternProperties:
> + "^channel@[0-9]+$": false
>
> unevaluatedProperties: false
>
> @@ -136,3 +178,35 @@ examples:
> adi,burnout-currents-enable;
> };
> };
> + - |
> + spi {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + adc@0 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "adi,ad7194";
> + reg = <0>;
> + spi-max-frequency = <1000000>;
> + spi-cpol;
> + spi-cpha;
> + clocks = <&ad7192_mclk>;
> + clock-names = "mclk";
> + interrupts = <25 0x2>;
> + interrupt-parent = <&gpio>;
> + dvdd-supply = <&dvdd>;
> + avdd-supply = <&avdd>;
> + vref-supply = <&vref>;
> +
> + channel@1 {
> + reg = <1>;
> + diff-channels = <1 6>;
> + };
> +
> + channel@2 {
> + reg = <2>;
> + diff-channels = <16 5>;
> + };
> + };
> + };
> --
> 2.34.1
>
