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From: Doug Anderson <dianders@chromium.org>
To: Mark Brown <broonie@kernel.org>
Cc: David Collins <collinsd@codeaurora.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-arm-msm@vger.kernel.org,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	devicetree@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
	Rajendra Nayak <rnayak@codeaurora.org>,
	Stephen Boyd <sboyd@kernel.org>
Subject: Re: [PATCH v4 1/2] regulator: dt-bindings: add QCOM RPMh regulator bindings
Date: Wed, 30 May 2018 09:12:25 -0700	[thread overview]
Message-ID: <CAD=FV=WVUmvPPd5BxXv9Sa_2CRPrrjQvYFyqroY-3fRr4f0Bzg@mail.gmail.com> (raw)
In-Reply-To: <20180530155044.GR6920@sirena.org.uk>

Hi,

On Wed, May 30, 2018 at 8:50 AM, Mark Brown <broonie@kernel.org> wrote:
> On Wed, May 30, 2018 at 07:54:47AM -0700, Doug Anderson wrote:
>> On Wed, May 30, 2018 at 3:37 AM, Mark Brown <broonie@kernel.org> wrote:
>
>> > I'm confused as to why we are specifying the maximum current the device
>> > can deliver in a given mode in the DT - surely that's a fixed property
>> > of the hardware?
>
>> Said another way: you're saying that you'd expect the "max-microamps"
>> table to have one fewer element than the listed modes?  So in the
>> above example you'd have:
>
> No, I'm saying that I don't know why that property exists at all.  This
> sounds like it's intended to be the amount of current the regulator can
> deliver in each mode which is normally a design property of the silicon.

Ah, got it.  So the whole point here is to be able to implement either
the function "set_load" or the function "get_optimum_mode".  We need
some sort of table to convert from current to mode.  That's what this
table does.

My argument to David was that since set_load / get_optimum_mode were
features of the regulator core these should actually be standard
properties and not Qualcomm-specific ones.

-Doug

  reply	other threads:[~2018-05-30 16:12 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-23  2:43 [PATCH v4 0/2] regulator: add QCOM RPMh regulator driver David Collins
2018-05-23  2:43 ` [PATCH v4 1/2] regulator: dt-bindings: add QCOM RPMh regulator bindings David Collins
2018-05-23 16:22   ` Rob Herring
2018-05-30  5:23   ` Doug Anderson
2018-05-30 10:37     ` Mark Brown
2018-05-30 14:54       ` Doug Anderson
2018-05-30 15:50         ` Mark Brown
2018-05-30 16:12           ` Doug Anderson [this message]
2018-05-30 16:20             ` Mark Brown
2018-05-30 16:24               ` Doug Anderson
2018-05-30 23:39                 ` David Collins
2018-05-31  0:34                   ` Doug Anderson
2018-05-31  1:03                     ` David Collins
2018-05-31 11:48                   ` Mark Brown
2018-06-01 21:41                     ` David Collins
2018-05-23  2:43 ` [PATCH v4 2/2] regulator: add QCOM RPMh regulator driver David Collins
2018-05-30  5:32   ` Doug Anderson
2018-05-30 23:58     ` David Collins
2018-05-30 16:33 ` [PATCH v4 0/2] " Mark Brown
2018-05-31  0:11   ` David Collins
2018-05-31 10:38     ` Mark Brown

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