Re: [PATCH 5/8] omap_hsmmc: RX51: set padconfs to pull down when powering off eMMC

Nishanth Menon
2010-01-13T23:30:45Z

Tony Lindgren had written, on 01/13/2010 03:00 PM, the following:
> * Tony Lindgren <tony@atomide.com> [100113 12:38]:
>> * Tony Lindgren <tony@atomide.com> [100113 12:36]:
>>> You might want to check what happens in omap off-idle mode in these cases
>>> and see if enabling OMAP_PIN_OFF_INPUT_PULLDOWN makes any difference in
>>> power consumption in off state. That probably does not matter unless the
>>> floating lines cause the eMMC to do something on it's own :)
>> Or OMAP_PIN_OFF_OUTPUT_LOW actually.
>
> One more time.. Most likely OMAP_PIN_OFF_INPUT_PULLDOWN is safer
> in general as the OMAP_PIN_OFF_OUTPUT_LOW does not work for all
> pins. According to the TRM, OMAP_PIN_OFF_OUTPUT_LOW only works
> for pins where at least one of the mux modes supports output
> mode.

is'nt vaux/vmmc/whatever voltage to eMMC shutoff for the device on the
board in off mode? I wonder why the behavior is seen. The only thing
that I am worried is that the board potentially will draw more current
as the lines are driven low.

--
Regards,
Nishanth Menon