[PATCH v2 1/2] dt-bindings: thermal: mediatek: Make resets optional for MT8196

[AngeloGioacchino Del Regno]

Both LVTS-AP and LVTS-MCU may be shared with SoC-internal MCUs
running some sort of firmware that checks thermals in order to
scale frequency, or to take action for critical SoC thermal
protection - and this is seen on most MT8196 boards.

Make resets optional, as doing a HW reset on such boards will
result in either an immediate thermal protect shutdown or in
a rather important and usually permanent system slowdown.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 .../bindings/thermal/mediatek,lvts-thermal.yaml     | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
index 975235130670..29f431fcdcd5 100644
--- a/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/mediatek,lvts-thermal.yaml
@@ -94,12 +94,23 @@ allOf:
         nvmem-cell-names:
           minItems: 2
 
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              enum:
+                - mediatek,mt8196-lvts-ap
+                - mediatek,mt8196-lvts-mcu
+    then:
+      required:
+        - resets
+
 required:
   - compatible
   - reg
   - interrupts
   - clocks
-  - resets
   - nvmem-cells
   - nvmem-cell-names
 
-- 
2.55.0