linux-kernel - Re: [PATCH 1/2] mmc: core: Add a capability for disabling mmc cards

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Message-ID: <CAD=FV=UZM9b6++DkgemZA7qpAZgFN+NyyLjRecgSdjcEsu0YYA@mail.gmail.com>
Date:	Wed, 22 Aug 2012 08:44:03 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Jaehoon Chung <jh80.chung@...sung.com>
Cc:	linux-mmc@...r.kernel.org, Olof Johansson <olof@...om.net>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Thomas P Abraham <thomas.ab@...sung.com>,
	Chris Ball <cjb@...top.org>,
	Will Newton <will.newton@...tec.com>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	James Hogan <james.hogan@...tec.com>,
	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: Re: [PATCH 1/2] mmc: core: Add a capability for disabling mmc cards

Jaehoon,

On Tue, Aug 21, 2012 at 9:35 PM, Jaehoon Chung <jh80.chung@...sung.com> wrote:
>
> Hi Doug,
>
> I didn't know what purpose is.
> Why need to add the MMC_CAP2_NO_MMC?
> If card is SD or SDIO, mmc_attach_mmc(host) should not be entered.
> Could you explain to me in more detail?

Thanks for your feedback.  In this case I have a card that is an MMC
card so mmc_attach_sdio() and mmc_attach_sd() will fail.  If I let
mmc_attach_mmc() run it will actually find the MMC card.  However, on
this platform it is not valid to recognize MMC cards.

-Doug
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