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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Mark Brown <broonie@kernel.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>,
	Rob Herring <robh@kernel.org>, Rafael Wysocki <rjw@rjwysocki.net>,
	nm@ti.com, linaro-kernel@lists.linaro.org,
	linux-pm@vger.kernel.org, rob.herring@linaro.org,
	lee.jones@linaro.org, devicetree@vger.kernel.org,
	Ian Campbell <ijc+devicetree@hellion.org.uk>,
	Kumar Gala <galak@codeaurora.org>,
	open list <linux-kernel@vger.kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Pawel Moll <pawel.moll@arm.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [PATCH 01/16] PM / OPP: Add 'supply-names' binding
Date: Tue, 27 Oct 2015 13:49:17 +0530	[thread overview]
Message-ID: <20151027081917.GD5505@ubuntu> (raw)
In-Reply-To: <20151022163942.GX8232@sirena.org.uk>

On 23-10-15, 01:39, Mark Brown wrote:
> When we start doing this we also start having to worry about things like
> the sequencing of the updates between the various supplies and end up in
> full on power sequencing (or at least baking some sequencing into the DT
> which will doubtless need extending at some point).

Absolutely.

> I'm not sure that's
> a place we want to end up just yet, I think it's safer to just have a
> little bit of code in the kernel that glues things together in the cases
> where this is needed.  

So you are effectively saying that we shouldn't go ahead with multi
regulator support in OPP library, right?

I went ahead with it as it came as a requirement (specially from
Qcom).

To the problem of sequencing, maybe we can just support that for the
simple case, where supplies will be programmed in the order in which
they are present in the property I added in this patch. And not try to
solve problem for the complex cases, if we feel it is getting ugly.

@Stephen ?

-- 
viresh

  reply	other threads:[~2015-10-27  8:19 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-11 12:01 [PATCH 00/16] PM / OPP: multiple regulators & opp-transition support Viresh Kumar
2015-09-11 12:01 ` [PATCH 01/16] PM / OPP: Add 'supply-names' binding Viresh Kumar
2015-09-11 12:01   ` Viresh Kumar
2015-09-14 20:22   ` Rob Herring
2015-09-15  2:47     ` Viresh Kumar
2015-09-15  2:47       ` Viresh Kumar
2015-10-08  9:27       ` Viresh Kumar
2015-10-16  0:22     ` Stephen Boyd
2015-10-16  6:02       ` Viresh Kumar
2015-10-16 19:16         ` Stephen Boyd
2015-10-16 19:16           ` Stephen Boyd
2015-10-17  4:10           ` Viresh Kumar
2015-10-21 13:18             ` Viresh Kumar
2015-10-22 16:39             ` Mark Brown
2015-10-27  8:19               ` Viresh Kumar [this message]
2015-10-28  8:17                 ` Mark Brown
2015-10-29 23:38                   ` Stephen Boyd
2015-10-29 23:38                     ` Stephen Boyd
2016-03-01  6:45     ` Viresh Kumar
2016-03-01 15:09       ` Nishanth Menon
2016-03-02  2:50       ` Mark Brown
2016-03-02 10:28         ` Viresh Kumar
2016-03-02 11:24           ` Mark Brown
2016-03-02 15:26             ` Nishanth Menon
2016-03-02 15:30               ` Mark Brown
2016-03-02 15:43                 ` Nishanth Menon
2015-10-22 16:30   ` Mark Brown
2015-09-11 12:01 ` [PATCH 02/16] PM / OPP: Add 'opp-microvolt-triplets' binding Viresh Kumar
2015-09-11 12:01   ` Viresh Kumar
2015-09-14 20:30   ` Rob Herring
2015-09-15  3:30     ` Viresh Kumar
2015-09-19 15:39       ` Mark Brown
2015-09-11 12:01 ` [PATCH 03/16] PM / OPP: Improve debug print messages with pr_fmt Viresh Kumar
2015-09-11 12:01   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 04/16] PM / OPP: Rename routines specific to old bindings with _v1 Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 05/16] PM / OPP: Parse all power-supply related bindings together Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 06/16] PM / OPP: Create separate structure for regulator/supplies Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 07/16] PM / OPP: Add multiple regulators support Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 08/16] PM / OPP: get/put regulators from OPP core Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 09/16] PM / OPP: Disable OPPs that aren't supported by the regulators Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 10/16] PM / OPP: Introduce dev_pm_opp_get_max_volt_latency() Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 11/16] PM / OPP: Introduce dev_pm_opp_get_max_transition_latency() Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 12/16] PM / OPP: Parse clock and voltage tolerance for v1 bindings Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 13/16] PM / OPP: Manage device clk as well Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 14/16] PM / OPP: Add dev_pm_opp_set_regulator() to specify regulator Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 15/16] PM / OPP: Add dev_pm_opp_set_rate() Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar
2015-09-11 12:02 ` [PATCH 16/16] PM / OPP: don't print error message for deferred probing Viresh Kumar
2015-09-11 12:02   ` Viresh Kumar

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