tree 69b4cce8998d3921d6b04720e658a6d6593e8d4c
parent ef29c0e273b874018f1802d12957d22008138240
author Shawn Lin <shawn.lin@rock-chips.com> 1464227782 +0800
committer Ulf Hansson <ulf.hansson@linaro.org> 1469435645 +0200

mmc: core: implement enhanced strobe support

Controllers use data strobe line to latch data from devices
under hs400 mode, but not for cmd line. So since emmc 5.1, JEDEC
introduces enhanced strobe mode for latching cmd response from
emmc devices to host controllers. This new feature is optional,
so it depends both on device's cap and host's cap to decide
whether to use it or not.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>

Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Tested-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>