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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

  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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