On Wed, Apr 17, 2024 at 08:00:53PM +0300, Alisa-Dariana Roman 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 | 77 +++++++++++++++++++
> 1 file changed, 77 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
> index cf5c568f140a..7e4e15e4e648 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
>
> @@ -89,6 +96,30 @@ properties:
> description: see Documentation/devicetree/bindings/iio/adc/adc.yaml
> type: boolean
>
> +patternProperties:
> + "^channel@[0-9a-z]+$":
Unit-addresses are hex (typically). So something like:
'^channel@(100|[0-9a-f]{1,2})$'
> + type: object
> + $ref: adc.yaml
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + description: The channel index.
> + minimum: 1
> + maximum: 256
Why not 0 based?
> +
> + diff-channels:
> + description: |
Don't need '|' if no formatting.
> + Both inputs can be connected to pins AIN1 to AIN16 by choosing the
> + appropriate value from 1 to 16.
> + items:
> + minimum: 1
> + maximum: 16
> +
> + required:
> + - reg
> + - diff-channels
Single ended modes aren't supported?
> +
> required:
> - compatible
> - reg
> @@ -103,6 +134,17 @@ required:
>
> allOf:
> - $ref: /schemas/spi/spi-peripheral-props.yaml#
> + - if:
> + properties:
> + compatible:
> + enum:
> + - adi,ad7190
> + - adi,ad7192
> + - adi,ad7193
> + - adi,ad7195
> + then:
> + patternProperties:
> + "^channel@[0-9a-z]+$": false
>
> unevaluatedProperties: false
>
> @@ -133,3 +175,38 @@ examples:
> adi,burnout-currents-enable;
> };
> };
> + - |
> + spi {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + adc@0 {
> + compatible = "adi,ad7194";
> + reg = <0>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + spi-max-frequency = <1000000>;
> + spi-cpol;
> + spi-cpha;
> + clocks = <&ad7192_mclk>;
> + clock-names = "mclk";
> + interrupts = <25 0x2>;
> + interrupt-parent = <&gpio>;
> + aincom-supply = <&aincom>;
> + 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
>
