mmc: dw_mmc: Add a timeout for sending CMD11

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In the Designware databook's description of the "Voltage Switch Normal
Scenario" it instructs us to set a timer and fail the voltage change
if we don't see the voltage change interrupt within 2ms.  Let's
implement that.  Without implementing this I have often been able to
reproduce a hang while trying to send CMD11 on an rk3288-based board
while constantly ejecting and inserting UHS cards.

Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

...

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Doug Anderson 2015-03-09 16:18:21 -07:00 • committed by Ulf Hansson

parent 488b8d63a6

commit 5c935165da

2 changed files with 28 additions and 0 deletions

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26

drivers/mmc/host/dw_mmc.c

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2

include/linux/mmc/dw_mmc.h

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