From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: Tue, 5 Aug 2025 07:47:39 +0000 (+0200)
Subject: dt-bindings: power: mediatek: Document access-controllers property
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=29a799917947d24c55e8902ef29f5cb52195682c;p=thirdparty%2Fkernel%2Fstable.git

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>
---

diff --git a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
index 9c7cc632abee2..500d98921581a 100644
--- a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
+++ b/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"
@@ -123,14 +132,17 @@ $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
@@ -138,6 +150,31 @@ $defs:
 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: