linux-sg2042/include/linux/mmc
Philip Rakity ca8e99b32e mmc: core: Set non-default Drive Strength via platform hook
Non default Drive Strength cannot be set automatically.  It is a function
of the board design and only if there is a specific platform handler can
it be set.  The platform handler needs to take into account the board
design.  Pass to the platform code the necessary information.

For example:  The card and host controller may indicate they support HIGH
and LOW drive strength.  There is no way to know what should be chosen
without specific board knowledge.  Setting HIGH may lead to reflections
and setting LOW may not suffice.  There is no mechanism (like ethernet
duplex or speed pulses) to determine what should be done automatically.

If no platform handler is defined -- use the default value.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Reviewed-by: Arindam Nath <arindam.nath@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-20 17:21:16 -04:00
..
Kbuild mmc: core: Add mmc CMD+ACMD passthrough ioctl 2011-05-24 21:02:54 -04:00
boot.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
card.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
core.h mmc: core: add non-blocking mmc request function 2011-07-20 17:21:10 -04:00
dw_mmc.h mmc: dw_mmc: fix stop when fallen back to PIO 2011-07-20 17:21:05 -04:00
host.h mmc: core: Set non-default Drive Strength via platform hook 2011-07-20 17:21:16 -04:00
ioctl.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
mmc.h mmc: block: allow get_card_status() to return error status 2011-07-20 17:20:54 -04:00
pm.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sd.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sdhci-spear.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sdhci.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sdio.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sdio_func.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sdio_ids.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sh_mmcif.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
sh_mobile_sdhi.h mmc: Standardize header file inclusion checks. 2011-07-20 17:20:48 -04:00
tmio.h mmc: sdhi: Add write16_hook 2011-07-20 17:20:57 -04:00