Re: [PATCH 1/4] dt-bindings: opp: Introduce opp-sustainable bindings

Rob Herring
2020-10-30T19:35:20Z

On Wed, Oct 28, 2020 at 02:08:44PM +0000, Lukasz Luba wrote:
> Add opp-sustainable as an additional property in the OPP node to describe
> the sustainable performance level of the device. This will help to
> estimate the sustainable performance of the whole system.
>
> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
> ---
> Documentation/devicetree/bindings/opp/opp.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
> index 9847dfeeffcb..cd01028de305 100644
> --- a/Documentation/devicetree/bindings/opp/opp.txt
> +++ b/Documentation/devicetree/bindings/opp/opp.txt
> @@ -154,6 +154,10 @@ Optional properties:
> - opp-suspend: Marks the OPP to be used during device suspend. If multiple OPPs
> in the table have this, the OPP with highest opp-hz will be used.
>
> +- opp-sustainable: Marks the OPP as sustainable. This property can be used for
> + estimating sustainable performance of the whole system. If multiple OPPs in
> + the table have this, the OPP with highest opp-hz will be used.
> +

Isn't this just the inverse of the turbo? or boost? flag we already
have?

Couldn't this be learned? I ran at this frequency and then overheated.
That could be dependent on ambient temperatures or dust build up on
fans/heatsink.

Rob