mmc: sdhci-msm: Fix HW issue with power IRQ handling during reset

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There is a rare scenario in HW, where the first clear pulse could
be lost when the actual reset and clear/read of status register
are happening at the same time. Fix this by retrying upto 10 times
to ensure the status register gets cleared. Otherwise, this will
lead to a spurious power IRQ which results in system instability.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Sahitya Tummala 2017-09-27 11:04:41 +05:30 • committed by Ulf Hansson

parent c7ccee224d

commit 401b2d06c4

1 changed files with 42 additions and 4 deletions

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drivers/mmc/host/sdhci-msm.c

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