linux-kernel - Re: [PATCH 0/2] mmc: sdhci: potentially bad behavior when using vmmc supply

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Date:	Mon, 9 Nov 2015 14:18:40 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Ulf Hansson <ulf.hansson@...aro.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	pierre.samat@...el.com
Cc:	Ludovic Desroches <ludovic.desroches@...el.com>
Subject: Re: [PATCH 0/2] mmc: sdhci: potentially bad behavior when using vmmc supply

On 9 November 2015 at 14:14, Ludovic Desroches
<ludovic.desroches@...el.com> wrote:
> On Mon, Nov 09, 2015 at 11:50:50AM +0100, Ulf Hansson wrote:
>> [...]
>>
>> >>
>> >> This doesn't seems like a case where a gpio regulator should be used
>> >> and I am not sure what problem it would solve. Beside to suppress the
>> >> log warnings (actually those aren't warnings but informations).
>> >>
>> >> Isn't sdhci_do_start_signal_voltage_switch() doing what you need here?
>> >>
>> >
>> > It is. I am only wondering the best way to describe the hardware:
>> > - No regulator but I have the 'no vqmmc regulator not found' message which
>> >   is a bit annoying and which can be interpreted as an issue for someone
>> >   who has no knowledge about this stuff.
>>
>> Hmm, should we turn them into debug messages? Both regulators are optional.
>>
>
> I think so. From my point of view, it is useless to indicate that
> something optionnal is missing.

Okay. Please go ahead and send a patch.

Kind regards
Uffe
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