mmc: dw_mmc: Allow lower TMOUT value than maximum

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The TMOUT register is always set with a full value for every transfer,
which (with a 200MHz clock) will give a full DRTO of ~84 milliseconds.
This is normally good enough to complete the request, but setting a full
value makes it impossible to test shorter timeouts, when for example
testing data read times on different SD cards.

Add a function to set any value smaller than the maximum of 0xFFFFFF.

Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20211119155337.14341-1-marten.lindahl@axis.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Mårten Lindahl 2021-11-19 16:53:37 +01:00 • committed by Ulf Hansson

parent 76bfc7ccc2

commit 6a8c2018e8

1 changed files with 28 additions and 1 deletions

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drivers/mmc/host/dw_mmc.c

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