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SubjectRe: [PATCH v5 4/5] dt-bindings: iio: adc: ad7192: Add AD7194 support
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On 13.04.2024 22:29, David Lechner wrote:
> On Sat, Apr 13, 2024 at 10:13 AM Alisa-Dariana Roman
> <alisadariana@gmail.com> 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@analog.com>
>> ---
>> .../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?

I thought it would be a good idea to have the pseudo-differential pairs
set in the driver (all from AIN1 to AIN16 referenced to AINCOM). Only
differential ones are fully configurable in the devicetree.

Kind regards,
Alisa-Dariana Roman


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