[U-Boot] [PATCH] mmc: add generic mmc spi driver

Mike Frysinger
2010-04-25T06:56:09Z

On Friday 23 April 2010 01:55:11 Thomas Chou wrote:
> On 04/23/2010 12:04 PM, Thomas Chou wrote:
> >> it's too bad the new framework doesnt allow for dynamic probing like
> >> the spi layer. makes it a pain to work with a SPI/MMC card that can have
> >> the CS changed on the fly.
>
> Second thought.
> With generic mmc framework, we can instance multiple mmc devices. Then
> we can probe one of them when we want.

i dont think that's a scalable solution. what if you have multiple spi busses
or 10's of GPIO CS's ? only way to scale is to have a new subcommand so
people can do it themselves. a simple CONFIG_CMD_MMC_SPI command which
forwards along calls to mmc_spi_init() on the fly would work.
-mike
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