Re: [PATCH v9 1/2] regulator: Add driver for max77802 PMIC PMIC regulators

Mark Brown
2014-08-22T18:31:22Z

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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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