dt-bindings: power: mediatek: Document access-controllers property

Allow specifying access-controllers in the main power controller
node and deprecate the old mediatek,infracfg, mediatek,infracfg-nao
and mediatek,smi properties located in the children.

This is done in order to both simplify the power controller
nodes and in preparation for adding support for new generation
SoCs like MT8196/MT6991 and other variants, which will need
to set protection on new busses.

Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250805074746.29457-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: AngeloGioacchino Del Regno

Documentation/devicetree/bindings/power/mediatek,power-controller.yaml

@@ -44,6 +44,15 @@ properties:
   '#size-cells':
     const: 0
 
+  access-controllers:
+    description:
+      A number of phandles to external blocks to set and clear the required
+      bits to enable or disable bus protection, necessary to avoid any bus
+      faults while enabling or disabling a power domain.
+      For example, this may hold phandles to INFRACFG and SMI.
+    minItems: 1
+    maxItems: 3
+
 patternProperties:
   "^power-domain@[0-9a-f]+$":
     $ref: "#/$defs/power-domain-node"
@@ -123,21 +132,49 @@ $defs:
       mediatek,infracfg:
         $ref: /schemas/types.yaml#/definitions/phandle
         description: phandle to the device containing the INFRACFG register range.
+        deprecated: true
 
       mediatek,infracfg-nao:
         $ref: /schemas/types.yaml#/definitions/phandle
         description: phandle to the device containing the INFRACFG-NAO register range.
+        deprecated: true
 
       mediatek,smi:
         $ref: /schemas/types.yaml#/definitions/phandle
         description: phandle to the device containing the SMI register range.
+        deprecated: true
 
     required:
       - reg
 
 required:
   - compatible
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8183-power-controller
+    then:
+      properties:
+        access-controllers:
+          minItems: 2
+          maxItems: 2
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8365-power-controller
+    then:
+      properties:
+        access-controllers:
+          minItems: 3
+          maxItems: 3
+
 additionalProperties: false
 
 examples: