[PATCH 03/10] dt-bindings: power: mediatek: Document access-controllers property
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Date: 2025-07-03 11:02:55
Also in:
linux-devicetree, linux-mediatek, linux-pm, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- .../power/mediatek,power-controller.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
index 9c7cc632abee..82bfd3899b22 100644
--- a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
+++ b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml@@ -44,6 +44,17 @@ 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 + items: + maxItems: 1 + patternProperties: "^power-domain@[0-9a-f]+$": $ref: "#/$defs/power-domain-node"
@@ -123,14 +134,17 @@ $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 +152,31 @@ $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:
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2.49.0