Re: [PATCH 1/3] dt-bindings: power: domain-idle-state: Add system-state

[Sudeep Holla]

On Mon, Oct 05, 2026 at 08:59:42PM +0530, Maulik Shah wrote:
> Some domain idle states require system-wide coordination and are not
> applicable while the platform is up and running.
> 
> Add a boolean system-state property to describe these states.
> 
> Assisted-by: Codex:GPT-6
> Signed-off-by: Maulik Shah <maulik.shah@xxxxxxxxxxxxxxxx>
> ---
>  .../devicetree/bindings/power/domain-idle-state.yaml       | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/domain-idle-state.yaml b/Documentation/devicetree/bindings/power/domain-idle-state.yaml
> index 4dd4f59bbbec..35dab3cd6aed 100644
> --- a/Documentation/devicetree/bindings/power/domain-idle-state.yaml
> +++ b/Documentation/devicetree/bindings/power/domain-idle-state.yaml
> @@ -45,6 +45,12 @@ patternProperties:
>            state will yield power benefits, after overcoming the overhead while
>            entering the idle state.
>  
> +      system-state:
> +        description:
> +          When present, this state requires system-wide coordination and is
> +          not applicable while the platform is up and running.
> +        type: boolean
> +

I would rather have a system wide QoS latency setting either h/w specific
or it can be purely software policy that tells all these states to be off
for normal CPU idle path.

>        arm,psci-suspend-param:
>          $ref: /schemas/types.yaml#/definitions/uint32
>          description: |
> @@ -77,5 +83,13 @@ examples:
>          exit-latency-us = <40>;
>          min-residency-us = <80>;
>        };
> +
> +      domain_power_off: domain-power-off {
> +        compatible = "domain-idle-state";
> +        entry-latency-us = <100>;
> +        exit-latency-us = <200>;
> +        min-residency-us = <1000>;

Please provide some realistic values. I understand this is just example
but way-off for a system level state. See your own platform values for
reference.

-- 
Regards,
Sudeep