2009-02-24 07:52:32 SPI_MMC

David Lee (UNITED STATES)

Message: 69808

Hi all,

I wonder if SPI_MMC driver supports both SPI mode and 1-bit mode.

Thanks,

David

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2009-02-24 10:26:43 Re: SPI_MMC

Mike Frysinger (UNITED STATES)

Message: 69817

i dont understand what you're asking ... there is only 1 data line, so it can only operate in 1 bit mode. and it's "mmc over spi", so it will always operate in "SPI mode".

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2009-02-25 00:32:27 Re: SPI_MMC

David Lee (UNITED STATES)

Message: 69853

Hi Mike,

Thanks. You have answered my question clearly.

David

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2009-02-25 00:38:42 Re: SPI_MMC

David Lee (UNITED STATES)

Message: 69855

What I don't quite understand is that why microSD does not work with the driver. I cross checked with information from http://en.wikipedia.org/wiki/MicroSD. It mentions that microSD supports -bit mode. However SPI mode is an optional feature for microSD. How should I understand it?

Thanks,

David

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2009-02-25 08:28:26 Re: SPI_MMC

Wolfgang Muees (GERMANY)

Message: 69886

I have NOT found a microSD which does NOT support SPI.

I have checked microSD working with the mmc_spi driver (see my posts and patches here).

regards

Wolfgang

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2009-02-27 23:34:05 Re: SPI_MMC