Re: [PATCH 1/2] OMAP3 Touchbook: Fix MMC caps

["Radek (Mrkva) Pilař" <mrkva@mrkva.eu>]

Well, MMC_CAP_8BIT data is definetely wrong - according to schematics,
there are only D0-D3 (+CLK and CMD) lines connected. I'm going to test 4
BIT and let you know.

On Thu, 24 Feb 2011 11:34:42 -0800, Tony Lindgren <tony@atomide.com>
wrote:
> * 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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