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From: Stephen Boyd <swboyd@chromium.org>
To: Rajendra Nayak <rnayak@codeaurora.org>,
	bjorn.andersson@linaro.org, robh+dt@kernel.org,
	ulf.hansson@linaro.org
Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property
Date: Wed, 05 Aug 2020 16:57:41 -0700	[thread overview]
Message-ID: <159667186194.1360974.10053425753327700919@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <98050322-9ba6-303c-4ca4-07baa56ebd80@codeaurora.org>

Quoting Rajendra Nayak (2020-08-05 01:13:06)
> 
> On 8/5/2020 12:09 PM, Stephen Boyd wrote:
> > Quoting Rajendra Nayak (2020-08-04 04:46:54)
> > 
> >> +       device's performance, also known as DVFS techniques. The list of performance
> >> +       state values should correspond to the list of power domains specified as part
> >> +       of the power-domains property.
> > 
> > This is different than assigned-clock-rates. I guess that's OK because
> > we don't need to assign parents with more specifiers. Maybe it should be
> > worded more strongly to clearly state that each cell corresponds to one
> > power domain? And that it should match the opp-level inside any OPP
> > table for the power domain?
> 
> Sure, I'll reword it to make it clear that we need the same number of cells
> as power-domains, and as you pointed out below that 0 corresponds to not setting
> anything.
> 
> For the matching of opp-level inside the OPP table of the power-domain, I don't
> think from the power-domain bindings we limit providers with only OPP tables to
> support performance states? It could be just a range that the provider manages
> internally?

Ok. The example made it match so maybe that can be clarified as well
that it doesn't need to match any OPP table performance state.

  reply	other threads:[~2020-08-05 23:57 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-04 11:46 [PATCH 0/3] Add support for assigned-performance-states Rajendra Nayak
2020-08-04 11:46 ` [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property Rajendra Nayak
2020-08-05  6:39   ` Stephen Boyd
2020-08-05  8:13     ` Rajendra Nayak
2020-08-05 23:57       ` Stephen Boyd [this message]
2020-08-04 11:46 ` [PATCH 2/3] PM / Domains: Add support for 'assigned-performance-states' Rajendra Nayak
2020-08-12  9:37   ` Ulf Hansson
2020-08-04 11:46 ` [PATCH 3/3] arm64: dts: sc7180: Add assigned-performance-states for i2c Rajendra Nayak
2020-08-05  6:41   ` Stephen Boyd
2020-08-05  8:14     ` Rajendra Nayak
2020-12-24 11:12 [PATCH 0/3] Add support for assigned-performance-states for geni i2c driver Roja Rani Yarubandi
2020-12-24 11:12 ` [PATCH 1/3] dt-bindings: power: Introduce 'assigned-performance-states' property Roja Rani Yarubandi
2020-12-26  0:16   ` Rob Herring
2020-12-27 16:56   ` Rob Herring
2020-12-31 15:49   ` Rob Herring
2021-01-08  9:39     ` Ulf Hansson
2021-01-15 16:15   ` Bjorn Andersson
2021-01-18  5:39     ` Rajendra Nayak

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