mmc: core: Add tunable delay before detecting card after card is inserted

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Allow to use tunable delay before detecting card after card is inserted,
which either comes from firmware node, or comes from debounce value
passed on to mmc_gpiod_request_cd(). If the platform doesn't support
debounce, then we fall back to use the debounce period as the delay,
otherwise, it behaves the same as before that a HW debounce(if set) plus
a 200ms hardcode delay before detecting the card.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Shawn Lin 2018-04-24 08:42:57 +08:00 • committed by Ulf Hansson

parent 52a70098ff

commit bfd694d5e2

2 changed files with 12 additions and 4 deletions

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9

drivers/mmc/core/host.c

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7

drivers/mmc/core/slot-gpio.c

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