From: Mark Brown <broonie@kernel.org>
To: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Cc: Yuvaraj Cd <yuvaraj.lkml@gmail.com>,
Doug Anderson <dianders@chromium.org>,
Olof Johansson <olof@lixom.net>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
linux-samsung-soc <linux-samsung-soc@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Abhilash Kesavan <a.kesavan@samsung.com>,
Prashanth G <prashanth.g@samsung.com>,
Alim Akhtar <alim.akhtar@samsung.com>,
sunil joshi <joshi@samsung.com>
Subject: Re: [PATCH v9 1/2] regulator: Add driver for max77802 PMIC PMIC regulators
Date: Fri, 22 Aug 2014 13:30:54 -0500 [thread overview]
Message-ID: <20140822183054.GY24407@sirena.org.uk> (raw)
In-Reply-To: <53F7838F.8060906@collabora.co.uk>
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On Fri, Aug 22, 2014 at 07:53:19PM +0200, Javier Martinez Canillas wrote:
> On 08/22/2014 04:45 PM, Mark Brown wrote:
> > On Fri, Aug 22, 2014 at 02:15:46PM +0200, Javier Martinez Canillas wrote:
> >> Mark, any opinions on how this should be solved will be highly appreciated.
> > If someone could tell me what "this" is that'd help...
> Sorry for not being clear on that regard. By "this" I meant the problem
> reported by Yuvaraj.
That mail was rather lengthy and seemed to be discussing several issues.
> The problem is that one of these regulators is used as the vqmmc-supply
> (VCCQ/VDD_IO) so the mmc host controller driver disables it on
> MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this
> shouldn't be an issue since on card detection, the vqmmc supply should be
> enabled again but on Exynos the built-in card detect line is on the same
> power rail as vqmmc. That means that disabling the regulator prevents card
> insertions to be detected.
If the MMC host controller needs a supply enabling in order to do card
detection and it's supposed to be doing card detection I'd expect it to
be enabling that supply. Why is it not doing that?
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next prev parent reply other threads:[~2014-08-22 18:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-18 8:32 [PATCH v9 0/2] Add Maxim 77802 regulator support Javier Martinez Canillas
2014-08-18 8:32 ` [PATCH v9 1/2] regulator: Add driver for max77802 PMIC PMIC regulators Javier Martinez Canillas
2014-08-18 15:23 ` Mark Brown
2014-08-22 6:01 ` Yuvaraj Cd
2014-08-22 12:15 ` Javier Martinez Canillas
2014-08-22 14:45 ` Mark Brown
2014-08-22 17:53 ` Javier Martinez Canillas
2014-08-22 18:30 ` Mark Brown [this message]
2014-08-22 22:02 ` Javier Martinez Canillas
2014-08-22 22:15 ` Doug Anderson
2014-08-25 8:22 ` Yuvaraj Cd
2014-08-25 9:07 ` Javier Martinez Canillas
2014-08-25 10:46 ` Yuvaraj Cd
2014-08-25 15:40 ` Doug Anderson
2014-08-25 17:20 ` Javier Martinez Canillas
2014-08-26 7:17 ` Mark Brown
2014-08-26 9:08 ` Javier Martinez Canillas
2014-08-26 9:12 ` Mark Brown
2014-08-18 8:32 ` [PATCH v9 2/2] regulator: Add DT bindings for max77802 " Javier Martinez Canillas
2014-08-18 15:23 ` Mark Brown
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