[U-Boot] [PATCH] omap3: mmc: mmc2 support

[Wolfgang Denk]

Dear Dirk,

In message <49CC0CC9.7060900 at googlemail.com> you wrote:
> Minkyu Kang wrote:
> > There are 3 MMC/SD/SDIO host controllers inside the device.
> > This patch will support mmc2 and mmc3.
> 
> By this patch, the MMC controller actually used is configured by 
> CONFIG_MMC_INDEX at compile time? I.e. setting CONFIG_MMC_INDEX to 1 
> will use mmc1, 2 will switch to mmc2 and CONFIG_MMC_INDEX 3 will 
> switch to mmc3?
> 
> If I got this right, do you think we can do this at runtime? E.g. 
> implementing a custom command
> 
> select_mmc <# of mmc controller to be used>
> 
> ?
> 
> With this, we could switch to mmc2 by doing something like
> 
> select_mmc 2
> 
> and afterwards all mmc read/write access will go to mmc2.
> 
> What do you think?

The idea is OK, but I would like to have this implemented using a
consistent interface across all other storage devices.

In other words, a "FOO device [dev] - show or set current device"
command should be implemented, no matter if "FOO" is "ide" or "usb"
or "sata" or "scsi" or "mmc" or ...

Best regards,

Wolfgang Denk

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