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From: Stephen Warren <swarren@wwwdotorg.org>
To: Tim Kryger <tim.kryger@gmail.com>, Bjorn Andersson <bjorn@kryo.se>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
	Alexandre Courbot <acourbot@nvidia.com>,
	Sachin Kamat <spk.linux@gmail.com>,
	linux-mmc <linux-mmc@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Alexandre Courbot <gnurou@gmail.com>
Subject: Re: Possible regression with commit 52221610d
Date: Tue, 16 Dec 2014 11:46:52 -0700	[thread overview]
Message-ID: <54907E1C.10300@wwwdotorg.org> (raw)
In-Reply-To: <CAD7vxxJaCdKiG9h_32OUSUkQMQk6AAwi6d0v01KEnSVTF8cN1w@mail.gmail.com>

On 12/14/2014 09:48 PM, Tim Kryger wrote:
> On Sat, Dec 13, 2014 at 11:22 PM, Bjorn Andersson <bjorn@kryo.se> wrote:
...
>> Or simply; what is vmmc (in the code) supposed to represent?
>
> Hi Bjorn,
>
> VMMC is the supply that delivers power out to the SD card itself (aka VDD).
>
> It is not the internal power rail/power domain of the host controller
> within the SoC.

I've seen this question come up quite a few times.

Should Documentation/devicetree/bindings/mmc/mmc.txt document the 
vmmc/vqmmc regulators? I assume they're considered shared across all 
MMC/SDHCI controller bindings?

Since that only covers DT, it might be nice to document vmmc-vs-vqmmc 
somewhere else too, such as right by the devm_regulator_get_optional() 
calls in mmc_regulator_get_supply() in drivers/mmc/core/core.c.

      parent reply	other threads:[~2014-12-16 18:46 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-04  3:05 Possible regression with commit 52221610d Alexandre Courbot
2014-11-04  3:05 ` Alexandre Courbot
2014-11-04  5:28 ` Tim Kryger
2014-11-04  9:00   ` Alexandre Courbot
2014-11-04 15:31     ` Tim Kryger
2014-11-05  8:10       ` Alexandre Courbot
2014-11-05 15:27         ` Tim Kryger
2014-11-06  2:15           ` Alexandre Courbot
2014-12-14  7:22       ` Bjorn Andersson
2014-12-15  4:48         ` Tim Kryger
2014-12-16  6:27           ` Bjorn Andersson
2014-12-16 18:18             ` Bjorn Andersson
2014-12-17  6:20               ` Tim Kryger
2014-12-17 19:57                 ` Bjorn Andersson
2014-12-22  3:01                   ` Tim Kryger
2015-01-05 19:52                     ` Bjorn Andersson
2015-01-12 10:31                       ` Ulf Hansson
2015-01-13 16:00                         ` Tim Kryger
2015-01-13 15:59                       ` Tim Kryger
2015-01-14  5:00                     ` Tim Kryger
2014-12-16 18:46           ` Stephen Warren [this message]

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