From: Viresh Kumar <viresh.kumar@linaro.org>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: Rajendra Nayak <rnayak@codeaurora.org>,
Mark Brown <broonie@kernel.org>,
Rafael Wysocki <rjw@rjwysocki.net>,
ulf.hansson@linaro.org, Kevin Hilman <khilman@linaro.org>,
Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@codeaurora.org>,
linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Vincent Guittot <vincent.guittot@linaro.org>,
robh+dt@kernel.org, lina.iyer@linaro.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH V4 1/9] PM / OPP: Allow OPP table to be used for power-domains
Date: Fri, 28 Apr 2017 16:42:36 +0530 [thread overview]
Message-ID: <20170428111236.GG21517@vireshk-i7> (raw)
In-Reply-To: <b3f5b62c-9423-98e4-d366-78186ab02fb9@arm.com>
On 28-04-17, 10:44, Sudeep Holla wrote:
> Just thinking out loud, I can see platforms with have OPPs can move to
> this binding in future eliminating the need to specify the clock and
> regulators explicitly. So, I am not saying I against this idea, but I
> see it might complicate the above case in terms of the precedence that
> we consider in DT from backward compatibility.
>
> E.g. if you now use this for just regulators, then I assume you continue
> to use clocks. However, that makes it difficult for platforms
> implementing *real* OPPs to reuse this binding as they may expect to
> skip clock altogether.
>
> Also we may need OPPs(both volt/freq), voltage only and clock only
> bindings though all 3 are driven by the firmware and all are at abstract
> levels. I am trying to broaden the scope now without having to churn
> this binding again in near future.
>
> So I don't totally agree that voltage regulators much have *real*
> voltages and not abstract scale. Yes the correct bindings might have
> such restrictions but can't we extend it ?
>
> Anyways these are just my opinion.
Everyone's opinion has equal merit here :)
I believe that some of your hesitation came from the point that I have
made opp-hz optional. That isn't the case anymore with V6.
Can we please take the discussion to that thread now and see if you
can find similar problems there as well.
Thanks a lot.
--
viresh
next prev parent reply other threads:[~2017-04-28 11:12 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-20 9:32 [PATCH V4 0/9] PM / Domains: Implement domain performance states Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 1/9] PM / OPP: Allow OPP table to be used for power-domains Viresh Kumar
2017-03-24 15:44 ` Rob Herring
2017-04-10 9:25 ` Viresh Kumar
2017-04-10 9:50 ` Viresh Kumar
2017-04-12 16:49 ` Sudeep Holla
2017-04-13 5:37 ` Viresh Kumar
2017-04-13 13:42 ` Sudeep Holla
2017-04-17 5:27 ` Viresh Kumar
2017-04-18 16:01 ` Sudeep Holla
2017-04-19 10:11 ` Viresh Kumar
2017-04-19 11:47 ` Viresh Kumar
2017-04-19 13:58 ` Sudeep Holla
2017-04-20 5:25 ` Viresh Kumar
2017-04-20 8:23 ` Ulf Hansson
2017-04-20 9:33 ` Viresh Kumar
2017-04-20 9:51 ` Sudeep Holla
2017-04-20 9:43 ` Sudeep Holla
2017-04-20 9:52 ` Viresh Kumar
2017-04-23 22:07 ` Kevin Hilman
2017-04-26 4:32 ` Rajendra Nayak
2017-04-26 13:55 ` Mark Brown
2017-04-27 9:42 ` Sudeep Holla
2017-04-27 10:50 ` Rajendra Nayak
2017-04-28 5:00 ` Viresh Kumar
2017-04-28 9:44 ` Sudeep Holla
2017-04-28 11:12 ` Viresh Kumar [this message]
2017-04-30 12:49 ` Mark Brown
2017-05-03 11:21 ` Sudeep Holla
2017-05-14 9:55 ` Mark Brown
2017-04-12 17:05 ` Sudeep Holla
2017-04-13 5:50 ` Viresh Kumar
2017-04-13 13:43 ` Sudeep Holla
2017-04-17 5:33 ` Viresh Kumar
2017-04-18 16:03 ` Sudeep Holla
2017-04-19 10:12 ` Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 2/9] PM / Domains: Use OPP tables " Viresh Kumar
2017-04-12 16:58 ` Sudeep Holla
2017-04-13 6:03 ` Viresh Kumar
2017-04-13 13:45 ` Sudeep Holla
2017-03-20 9:32 ` [PATCH V4 3/9] PM / QOS: Keep common notifier list for genpd constraints Viresh Kumar
2017-04-19 14:06 ` Ulf Hansson
2017-04-20 4:45 ` [PATCH V5 " Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 4/9] PM / QOS: Add DEV_PM_QOS_PERFORMANCE request Viresh Kumar
2017-04-19 14:07 ` Ulf Hansson
2017-04-20 4:34 ` Viresh Kumar
2017-04-20 4:46 ` [PATCH V5 " Viresh Kumar
2017-04-20 6:53 ` Ulf Hansson
2017-03-20 9:32 ` [PATCH V4 5/9] PM / OPP: Add support to parse OPP table for power-domains Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 6/9] PM / OPP: Add dev_pm_opp_find_dps() helper Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 7/9] PM / domain: Register for PM QOS performance notifier Viresh Kumar
2017-04-20 4:46 ` [PATCH V5 " Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 8/9] PM / Domain: Add struct device to genpd Viresh Kumar
2017-03-20 9:32 ` [PATCH V4 9/9] PM / Domain: Add support to parse domain's OPP table Viresh Kumar
2017-04-12 14:24 ` [PATCH V4 0/9] PM / Domains: Implement domain performance states Viresh Kumar
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