[PATCH v5 2/5] dt-bindings: iio: adc: ad7192: Add aincom supply

[Alisa-Dariana Roman <alisadariana@gmail.com>]

AINCOM should actually be a supply. If present and it has a non-zero
voltage, the pseudo-differential channels are configured as single-ended
with an offset. Otherwise, they are configured as differential channels
between AINx and AINCOM pins.

Signed-off-by: Alisa-Dariana Roman <alisa.roman@analog.com>
---
 .../devicetree/bindings/iio/adc/adi,ad7192.yaml          | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
index 16def2985ab4..ba506af3b73e 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7192.yaml
@@ -41,6 +41,14 @@ properties:
   interrupts:
     maxItems: 1
 
+  aincom-supply:
+    description: |
+      Optional AINCOM voltage supply. If present and it has a non-zero voltage,
+      the pseudo-differential channels are configured as single-ended channels
+      with the AINCOM voltage as offset. Otherwise, the pseudo-differential
+      channels are configured as differential channels: voltageX-voltage0, with
+      AINCOM as the negative input.
+
   dvdd-supply:
     description: DVdd voltage supply
 
@@ -117,6 +125,7 @@ examples:
             clock-names = "mclk";
             interrupts = <25 0x2>;
             interrupt-parent = <&gpio>;
+            aincom-supply = <&aincom>;
             dvdd-supply = <&dvdd>;
             avdd-supply = <&avdd>;
             vref-supply = <&vref>;
-- 
2.34.1