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-rw-r--r--Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
index 7d33c4e09905..c3a116427dc3 100644
--- a/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/sigma-delta-modulator.yaml
@@ -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>;
};