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SubjectRe: [PATCH 1/4] dt-bindings: iio: adc: sd modulator: add vref support
On Tue, 4 Feb 2020 11:10:05 +0100
Olivier Moysan <olivier.moysan@st.com> wrote:

> Add vref supply support to sigma delta modulator.
>
> Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
> ---
> .../devicetree/bindings/iio/adc/sigma-delta-modulator.yaml | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
> index a390343d0c2a..2afe0765e971 100644
> --- a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
> +++ b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
> @@ -8,6 +8,7 @@ title: Device-Tree bindings for sigma delta modulator
>
> maintainers:
> - Arnaud Pouliquen <arnaud.pouliquen@st.com>
> + - Olivier Moysan <olivier.moysan@st.com>
>
> properties:
> compatible:
> @@ -21,6 +22,9 @@ properties:
> '#io-channel-cells':
> const: 0
>
> + vref-supply:
> + description: Phandle to the vref input analog reference voltage.
I note this in review of patch 2 but in general I'm not sure we should
be introducing this for generic devices. It's fine if we have an
explicit compatible but there is no reason to assume a generic sd-modulator
uses an external reference.

Jonathan

> +
> required:
> - compatible
> - '#io-channel-cells'

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