Re: [PATCH v2 1/3] dt-bindings:iio:adc: add generic settling-time-us and average-samples channel properties
From: Jonathan Cameron <jic23@kernel.org>
Date: 2021-03-13 15:16:30
Also in:
linux-iio, lkml
On Fri, 12 Mar 2021 11:55:13 +0100 Oleksij Rempel [off-list ref] wrote:
quoted hunk ↗ jump to hunk
Settling time and over sampling is a typical challenge for different IIO ADC devices. So, introduce channel specific settling-time-us and average-samples properties to cover this use case. Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> --- Documentation/devicetree/bindings/iio/adc/adc.yaml | 9 +++++++++ 1 file changed, 9 insertions(+)diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml index 912a7635edc4..c748f6573027 100644 --- a/Documentation/devicetree/bindings/iio/adc/adc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml@@ -39,4 +39,13 @@ properties: The first value specifies the positive input pin, the second specifies the negative input pin. + settling-time-us: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Time between enabling the channel and firs stable readings.
first
+ + average-samples: + $ref: /schemas/types.yaml#/definitions/uint32 + description: Number of data samples which are averaged for each read.
So in IIO at least, we tend to refer to this as oversampling. Perhaps we should use that term here as well? It would also be good to give some hint as to why this might be a DT property rather than a userspace control. Thanks, Jonathan
+ additionalProperties: true