linux-kernel - [PATCH 1/2] dt-bindings: thermal: Update the bindings to support multiple sensors

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Date:   Fri, 18 Feb 2022 09:46:03 +0100
From:   Alexandre Bailon <abailon@...libre.com>
To:     rafael@...nel.org, rui.zhang@...el.com, daniel.lezcano@...aro.org,
        amitk@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        ben.tseng@...iatek.com, khilman@...libre.com, mka@...omium.org,
        Alexandre Bailon <abailon@...libre.com>
Subject: [PATCH 1/2] dt-bindings: thermal: Update the bindings to support multiple sensors

This adds two optionals properties and update the thermal-sensors
property description to support multiple sensors with a thermal zone.

Signed-off-by: Alexandre Bailon <abailon@...libre.com>
---
 .../bindings/thermal/thermal-zones.yaml       | 30 +++++++++++++++++--
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
index 2d34f3ccb2572..9f944c2364589 100644
--- a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
+++ b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
@@ -77,10 +77,24 @@ patternProperties:
 
       thermal-sensors:
         $ref: /schemas/types.yaml#/definitions/phandle-array
-        maxItems: 1
         description:
-          The thermal sensor phandle and sensor specifier used to monitor this
-          thermal zone.
+          An array of thermal sensor phandle and sensor specifier used to
+          monitor this thermal zone.
+          If the array contains more than one sensor then the returned value
+          is the maximum unless aggregation-min or aggregation-avg properties
+          are set.
+
+      aggregation-min:
+        type: boolean
+        description:
+          Return the minimum temperature when the thermal monitor multiple
+          sensors.
+
+      aggregation-avg:
+        type: boolean
+        description:
+          Return the average temperature when the thermal monitor multiple
+          sensors.
 
       coefficients:
         $ref: /schemas/types.yaml#/definitions/uint32-array
@@ -338,5 +352,15 @@ examples:
                             };
                     };
             };
+
+            /* ... */
+
+            soc-max-thermal {
+                    polling-delay-passive = <250>;
+                    polling-delay = <1000>;
+                    thermal-sensors = <&tsens0 5>, <&tsens0 11>;
+                    trips {};
+                    cooling-maps {};
+            };
     };
 ...
-- 
2.34.1