From: Tony Lindgren <tony@atomide.com>
To: "Radek (Mrkva) Pilař" <mrkva@mrkva.eu>
Cc: linux-omap@vger.kernel.org
Subject: Re: [PATCH 1/2] OMAP3 Touchbook: Fix MMC caps
Date: Thu, 24 Feb 2011 11:34:42 -0800 [thread overview]
Message-ID: <20110224193441.GF20560@atomide.com> (raw)
In-Reply-To: <44de2f4c8b17d38df1d25b7236223247@localhost>
* Radek (Mrkva) Pilař <mrkva@mrkva.eu> [110224 10:02]:
> MMC controller cannot handle MMC_CAP_4_BIT_DATA nor
> MMC_CAP_8_BIT_DATA - the card won't be detected (tested with two
> SDHC cards, both Class6). Thus disabling.
Hmm it might be worth checking that the MMC data lines are muxed
correctly. Maybe make sure CONFIG_OMAP_MUX_DEBUG is set in
your .config and CONFIG_DEBUG_FS too. Then boot and and mount
debugfs with mount -tdebugfs debugfs /sys/kernel/debug.
Then you can do:
# grep -i mmc1 /sys/kernel/debug/omap_mux/* | grep dat
And check the settings. Changing the values could cause data
corruption, so use a temporary root file system!
Tony
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next prev parent reply other threads:[~2011-02-24 19:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-24 17:59 [PATCH 1/2] OMAP3 Touchbook: Fix MMC caps Radek (Mrkva) Pilař
2011-02-24 19:34 ` Tony Lindgren [this message]
2011-02-24 20:09 ` Radek (Mrkva) Pilař
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