[PATCH RFC v2 2/3] dt-bindings: iio: adc: Add excitation current sources properties

[Kurt Borja <kuurtb@gmail.com>]

Some ADCs incorporate current sources that provide excitation current to
resistive temperature devices (RTDs), thermistors, diodes and other
resistive sensors that require constant current biasing.

Signed-off-by: Kurt Borja <kuurtb@gmail.com>
---
 Documentation/devicetree/bindings/iio/adc/adc.yaml | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/adc/adc.yaml b/Documentation/devicetree/bindings/iio/adc/adc.yaml
index fdad6b8276c934c..160a8cfa9842a86 100644
--- a/Documentation/devicetree/bindings/iio/adc/adc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adc.yaml
@@ -86,6 +86,25 @@ properties:
       source. If two values are provided, the first one corresponds to the
       positive source and the second to the negative source.
 
+  excitation-channels:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      Excitation current sources provide current to resistive temperature
+      devices (RTDs), thermistors, diodes and other resistive sensors that
+      require constant current biasing.
+
+      This array describes the mux configuration of the excitation current
+      sources.
+
+  excitation-current-microamp:
+    description:
+      Excitation current sources provide current to resistive temperature
+      devices (RTDs), thermistors, diodes and other resistive sensors that
+      require constant current biasing.
+
+      This array describes the current configuration of the excitation current
+      sources or the single matched current for all sources.
+
 anyOf:
   - oneOf:
       - required:

-- 
2.54.0