[v4,12/15] dt-bindings: iio: Add AD7091R-8

Add device tree documentation for AD7091R-8.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
---
 .../bindings/iio/adc/adi,ad7091r5.yaml        | 82 ++++++++++++++++++-
 1 file changed, 78 insertions(+), 4 deletions(-)

On Sat, Dec 16, 2023 at 02:50:11PM -0300, Marcelo Schmitt wrote:
> Add device tree documentation for AD7091R-8.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>

Cheers,
Conor.

> ---
>  .../bindings/iio/adc/adi,ad7091r5.yaml        | 82 ++++++++++++++++++-
>  1 file changed, 78 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> index ce7ba634643c..ddec9747436c 100644
> --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> @@ -4,36 +4,92 @@
>  $id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#
>  $schema: http://devicetree.org/meta-schemas/core.yaml#
>  
> -title: Analog Devices AD7091R5 4-Channel 12-Bit ADC
> +title: Analog Devices AD7091R-2/-4/-5/-8 Multi-Channel 12-Bit ADCs
>  
>  maintainers:
>    - Michael Hennerich <michael.hennerich@analog.com>
> +  - Marcelo Schmitt <marcelo.schmitt@analog.com>
>  
>  description: |
> -  Analog Devices AD7091R5 4-Channel 12-Bit ADC
> +  Analog Devices AD7091R5 4-Channel 12-Bit ADC supporting I2C interface
>    https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
> +  Analog Devices AD7091R-2/AD7091R-4/AD7091R-8 2-/4-/8-Channel 12-Bit ADCs
> +  supporting SPI interface
> +  https://www.analog.com/media/en/technical-documentation/data-sheets/AD7091R-2_7091R-4_7091R-8.pdf
>  
>  properties:
>    compatible:
>      enum:
> +      - adi,ad7091r2
> +      - adi,ad7091r4
>        - adi,ad7091r5
> +      - adi,ad7091r8
>  
>    reg:
>      maxItems: 1
>  
> +  vdd-supply:
> +    description:
> +      Provide VDD power to the sensor (VDD range is from 2.7V to 5.25V).
> +
> +  vdrive-supply:
> +    description:
> +      Determines the voltage level at which the interface logic will operate.
> +      The V_drive voltage range is from 1.8V to 5.25V and must not exceed VDD by
> +      more than 0.3V.
> +
>    vref-supply:
>      description:
>        Phandle to the vref power supply
>  
> -  interrupts:
> +  convst-gpios:
> +    description:
> +      GPIO connected to the CONVST pin.
> +      This logic input is used to initiate conversions on the analog
> +      input channels.
>      maxItems: 1
>  
> +  reset-gpios:
> +    maxItems: 1
> +
> +  interrupts:
> +    description:
> +      Interrupt for signaling when conversion results exceed the high limit for
> +      ADC readings or fall below the low limit for them. Interrupt source must
> +      be attached to ALERT/BUSY/GPO0 pin.
> +    maxItems: 1
>  
>  required:
>    - compatible
>    - reg
>  
> -additionalProperties: false
> +allOf:
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +  # AD7091R-2 does not have ALERT/BUSY/GPO pin
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - adi,ad7091r2
> +    then:
> +      properties:
> +        interrupts: false
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - adi,ad7091r2
> +              - adi,ad7091r4
> +              - adi,ad7091r8
> +    then:
> +      required:
> +        - convst-gpios
> +
> +unevaluatedProperties: false
>  
>  examples:
>    - |
> @@ -51,4 +107,22 @@ examples:
>              interrupt-parent = <&gpio>;
>          };
>      };
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    spi {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        adc@0 {
> +            compatible = "adi,ad7091r8";
> +            reg = <0x0>;
> +            spi-max-frequency = <1000000>;
> +            vref-supply = <&adc_vref>;
> +            convst-gpios = <&gpio 25 GPIO_ACTIVE_LOW>;
> +            reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
> +            interrupts = <22 IRQ_TYPE_EDGE_FALLING>;
> +            interrupt-parent = <&gpio>;
> +        };
> +    };
>  ...
> -- 
> 2.42.0
>