[PATCH v4 1/2] dt-bindings: thermal: generic-adc: Add optional io-channel-cells property

[Svyatoslav Ryhel <clamor95@gmail.com>]

This implements a mechanism to derive temperature values from an existing
ADC IIO channel, effectively creating a temperature IIO channel. This
approach avoids adding a new sensor and its associated conversion table,
while providing IIO-based temperature data for devices that may not utilize
hwmon.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
 .../devicetree/bindings/thermal/generic-adc-thermal.yaml      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml b/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml
index 12e6418dc24d..4bc2cff0593c 100644
--- a/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml
@@ -30,6 +30,9 @@ properties:
   io-channel-names:
     const: sensor-channel
 
+  '#io-channel-cells':
+    const: 1
+
   temperature-lookup-table:
     description: |
       Lookup table to map the relation between ADC value and temperature.
@@ -60,6 +63,7 @@ examples:
         #thermal-sensor-cells = <0>;
         io-channels = <&ads1015 1>;
         io-channel-names = "sensor-channel";
+        #io-channel-cells = <1>;
         temperature-lookup-table = <
               (-40000) 2578
               (-39000) 2577
-- 
2.43.0