[PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add adi,reference-source

Liam Beguin
2021-07-08T23:56:51Z

From: Liam Beguin <lvb@xiphos.com>

Add bindings documentation for the adi,reference-source property.
This property is required to properly configure the ADC sample request
based on which reference source should be used for the calculation.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
---
.../bindings/iio/adc/adi,ad7949.yaml | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
index 9b56bd4d5510..3f4629281cc8 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml
@@ -35,6 +35,28 @@ properties:
"#io-channel-cells":
const: 1

+ adi,reference-select:
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - enum: [0, 1, 2, 3, 6, 7]
+
+ default: 7
+ description: |
+ Select the reference voltage source to use when converting samples.
+ Acceptable values are:
+ - 0: Internal reference and temperature sensor enabled.
+ Vref=2.5V, buffered output
+ - 1: Internal reference and temperature sensor enabled.
+ Vref=4.096V, buffered output
+ - 2: Use external reference, temperature sensor enabled.
+ Internal buffer disabled
+ - 3: Use external reference, internal buffer and temperature sensor
+ enabled.
+ - 6: Use external reference, internal buffer and temperature sensor
+ disabled.
+ - 7: Use external reference, internal buffer enabled.
+ Internal reference and temperature sensor disabled.
+
required:
- compatible
- reg
--
2.30.1.489.g328c10930387