| Message ID | 20240603-ad4111-v5-1-9a9c54d9ac78@analog.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | Add support for AD411x | expand |
On Mon, Jun 03, 2024 at 07:22:59PM +0300, Dumitru Ceclan via B4 Relay wrote: > From: Dumitru Ceclan <dumitru.ceclan@analog.com> > > There are ADCs that are differential but support to measure single-ended > signals on the same channels by connecting a constant voltage to the > negative input pin. > > This property allows to properly define a single-ended channel that > requires two inputs to be specified. Software can use the presence of > this property to mark the channel as not differential. > > Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Thanks, Conor.
diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml index 0a77592f7388..8e7835cf36fd 100644 --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml @@ -46,6 +46,17 @@ properties: differential channels). If this and diff-channels are not present reg shall be used instead. + common-mode-channel: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Some ADCs have differential input pins that can be used to measure + single-ended or pseudo-differential inputs. This property can be used + in addition to single-channel to signal software that this channel is + not differential but still specify two inputs. + + The input pair is specified by setting single-channel to the positive + input pin and common-mode-channel to the negative pin. + settling-time-us: description: Time between enabling the channel and first stable readings.