mmc: mediatek: fix SDIO irq issue

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SDIO irq is not triggered by low level, but by falling edge in our
previous IC. This mechanism only have one chance to catch the SDIO irq
if a SDIO irq comes within the multiple block transmission. This SDIO
irq may be easily lost, because falling edge appears only once within 2
clock after data transmission is completed.

SDIO irq recheck mechanism will make sure all irqs can be
processed correctly.

Signed-off-by: Yong Mao <yong.mao@mediatek.com>
Link: https://lore.kernel.org/r/1585299097-6897-2-git-send-email-yong.mao@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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yong mao 2020-03-27 16:51:37 +08:00 • committed by Ulf Hansson

parent d4a384cb56

commit 9e2582e574

1 changed files with 41 additions and 0 deletions

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drivers/mmc/host/mtk-sd.c

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