| Message ID | 20201028140847.1018-2-lukasz.luba@arm.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add sustainable OPP concept | expand |
On 14:08-20201028, 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. By "sustainable", do you mean sustainable across Process, Voltage and Temperature corners upto the max rated operational Power-ON hours without IDLE state being achieved on the processor? OR do you mean to leave it up to interpretation? > + > - opp-supported-hw: This property allows a platform to enable only a subset of > the OPPs from the larger set present in the OPP table, based on the current > version of the hardware (already known to the operating system). > -- > 2.17.1 >
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
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. + - opp-supported-hw: This property allows a platform to enable only a subset of the OPPs from the larger set present in the OPP table, based on the current version of the hardware (already known to the operating system).
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(+)