dt-bindings: iio: add vref support to sd modulator

Allow to specify the reference voltage used by the SD modulator.
When the SD modulator is defined as an IIO backend, the reference
voltage can be used to evaluate scaling information of the IIO device.
The reference voltage is not used otherwise.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20240730084640.1307938-7-olivier.moysan@foss.st.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Olivier Moysan 2024-07-30 10:46:36 +02:00 committed by Jonathan Cameron
parent 281b4318be
commit e738510555

View File

@ -24,6 +24,12 @@ properties:
'#io-channel-cells':
const: 0
vref-supply:
description: Phandle to the vref input analog reference voltage.
dependencies:
vref-supply: [ '#io-backend-cells' ]
required:
- compatible
@ -38,6 +44,7 @@ examples:
// Backend binding example. SD modulator configured as an IIO backend device
ads1201_0: adc {
compatible = "sd-modulator";
vref-supply = <&vdd_adc>;
#io-backend-cells = <0>;
};