dt-bindings: power: supply: bq256xx: Add ti,no-thermistor property

Add a new property ti,no-thermistor to indicate that no thermistor is
connected to the TS pin of the chip.
Signed-off-by: Hermes Zhang <chenhuiz@axis.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Documentation/devicetree/bindings/power/supply/bq256xx.yaml

@@ -68,11 +68,29 @@ properties:
       Interrupt sends an active low, 256 μs pulse to host to report the charger
       device status and faults.
 
+  ti,no-thermistor:
+    type: boolean
+    description: Indicates that no thermistor is connected to the TS pin
+
 required:
   - compatible
   - reg
   - monitored-battery
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ti,bq25600
+              - ti,bq25601
+              - ti,bq25600d
+              - ti,bq25601d
+    then:
+      properties:
+        ti,no-thermistor: false
+
 additionalProperties: false
 
 examples: