On Tue, Aug 05, 2025 at 09:47:37AM +0200, AngeloGioacchino Del Regno wrote:
> Some of the SMI Common HW provides access control to at least
> the power controller: document the #access-controller-cells
> property and allow specifying it only for MT8183 and MT8365
> as those are the only known SoCs with an SMI acting as access
> controller.
>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
> .../memory-controllers/mediatek,smi-common.yaml | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> index 0762e0ff66ef..74b355a08493 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> @@ -74,6 +74,9 @@ properties:
> minItems: 2
> maxItems: 4
>
> + '#access-controller-cells':
> + const: 0
I'm still wondering why this is 0? That seems odd that an access
controller is 1:1 with a device.
> +
> mediatek,smi:
> $ref: /schemas/types.yaml#/definitions/phandle
> description: a phandle to the smi-common node above. Only for sub-common.
> @@ -168,6 +171,19 @@ allOf:
> - const: apb
> - const: smi
>
> + - if: # for SMI providing access control
> + properties:
> + compatible:
> + enum:
> + - mediatek,mt8183-smi-common
> + - mediatek,mt8365-smi-common
> + then:
> + properties:
> + '#access-controller-cells': true
> + else:
> + properties:
> + '#access-controller-cells': false
> +
> additionalProperties: false
>
> examples:
> --
> 2.50.1
>