linux-kernel - Re: [PATCH 0/3] mmc: sdhci: Card detection fixes

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Date:	Fri, 26 Jun 2015 14:05:56 +0300
From:	"Ivan T. Ivanov" <ivan.ivanov@...aro.org>
To:	Jaehoon Chung <jh80.chung@...sung.com>
Cc:	Ulf Hansson <ulf.hansson@...aro.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Tim Kryger <tim.kryger@...il.com>,
	Aisheng Dong <b29396@...escale.com>, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 0/3] mmc: sdhci: Card detection fixes


On Fri, 2015-06-26 at 19:31 +0900, Jaehoon Chung wrote:
> Hi, Ivan.
> 
> On 06/26/2015 07:00 PM, Ivan T. Ivanov wrote:
> > Following changes aimed to fix some aspects of card detection, when
> > BROKEN_CARD_DETECTION quirk is set.
> 
> As i know, when there is no card detection scheme, BROKEN_CARD_DETECTION quirks is set.
> If it can use CD_GPIO, doesn't it need to set BROKEN_CARD_DETECTION?
> Just wondering..
> 

I am not sure that I get this. My understanding is that if controller have 
issues reporting card present state, users could use GPIO for card state sensing.

Probably this don't sound reasonable, but someone could just want to ignore
controller capabilities and use GPIO explicitly.

Regards,
Ivan

> Best Regards,
> Jaehoon Chung
> 
> > Ivan T. Ivanov (3):
> >   mmc: sdhci: let GPIO based card detection have higher precedence
> >   mmc: sdhci: don't use card state polling when CD GPIO is defined
> >   mmc: sdhci: properly check card present state when quirk
> >     NO_CARD_NO_RESET is set
> > 
> >  drivers/mmc/host/sdhci.c | 17 ++++++++++-------
> >  1 file changed, 10 insertions(+), 7 deletions(-)
> > 
> > --
> > 1.9.1
> > 
> > --
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> > 
> 
> 
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