Commit 9a7b7594 authored by Liam Beguin's avatar Liam Beguin Committed by Jonathan Cameron
Browse files

dt-bindings: iio: adc: ad7949: update voltage reference bindings 



Update bindings to describe support for buffered and unbuffered external
voltage references selection, and add adi,internal-ref-microvolt for
internal voltage reference selection.

Signed-off-by: default avatarLiam Beguin <lvb@xiphos.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210815213309.2847711-5-liambeguin@gmail.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 37930650

Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml

+48 −3
Original line number Diff line number Diff line
@@ -26,19 +26,43 @@ properties: 
  reg:

    maxItems: 1



  vrefin-supply:

    description:

      Buffered ADC reference voltage supply.



  vref-supply:

    description:

      ADC reference voltage supply

      Unbuffered ADC reference voltage supply.



  adi,internal-ref-microvolt:

    description: |

      Internal reference voltage selection in microvolts.



      If no internal reference is specified, the channel will default to the

      external reference defined by vrefin-supply (or vref-supply).

      vrefin-supply will take precedence over vref-supply if both are defined.



      If no supplies are defined, the reference selection will default to

      4096mV internal reference.



    enum: [2500000, 4096000]

    default: 4096000





  spi-max-frequency: true



  "#io-channel-cells":

  '#io-channel-cells':

    const: 1



  '#address-cells':

    const: 1



  '#size-cells':

    const: 0



required:

  - compatible

  - reg

  - vref-supply



additionalProperties: false
@@ -49,9 +73,30 @@ examples: 
        #size-cells = <0>;



        adc@0 {

            #address-cells = <1>;

            #size-cells = <0>;



            compatible = "adi,ad7949";

            reg = <0>;

            vref-supply = <&vdd_supply>;

        };



        adc@1 {

            #address-cells = <1>;

            #size-cells = <0>;



            compatible = "adi,ad7949";

            reg = <1>;

            vrefin-supply = <&vdd_supply>;

        };



        adc@2 {

            #address-cells = <1>;

            #size-cells = <0>;



            compatible = "adi,ad7949";

            reg = <2>;

            adi,internal-ref-microvolt = <4096000>;

        };

    };

...