[PATCH v2 18/20] mmc: sdio: enable a default power off mode of the card

On 07/21/2010 08:33 PM, ext Ohad Ben-Cohen wrote:

Add support for an SDIO device to stay powered off even without
the presence of an SDIO function driver. A host should explicitly
ask for it by means of MMC_CAP_DONT_POWER_CARD, and the SDIO
function driver should know it needs to call sdio_claim_power
before accessing the device.

Signed-off-by: Ohad Ben-Cohen<redacted>

Shouldn't this be the default behaviour? If there is no function driver for any 
of the functions of the card, then sdio core shold power off the card.

I don't see a need for a special capability flag for this.

in fact MMC_CAP_DONT_POWER_CARD does not seem like an mmc host's capability 
flag, it seems more like a request from the board to keep the card powered off.

regards,
-roger