mmc: sdhci-tegra: Issue CMD and DAT resets together
authorPrathamesh Shete <pshete@nvidia.com>
Tue, 6 Dec 2022 16:59:45 +0000 (17:59 +0100)
committerUlf Hansson <ulf.hansson@linaro.org>
Wed, 7 Dec 2022 12:30:25 +0000 (13:30 +0100)
commitacc13958c2b2623c17e2450b8cd6881b698756d3
tree7f1be98ffac7b3997c376f297c282fb03b9912eb
parent03813c81e62559489afa1b461ab159b5641d66f8
mmc: sdhci-tegra: Issue CMD and DAT resets together

In case of error condition to avoid system crash Tegra SDMMC controller
requires CMD and DAT resets issued together. SDHCI controller FSM goes
into bad state due to rapid SD card hot-plug event. Issuing reset on the
CMD FSM before DATA FSM results in kernel panic, hence add support to
issue CMD and DAT resets together.

This is applicable to Tegra186 and later chips.

Signed-off-by: Aniruddha TVS Rao <anrao@nvidia.com>
Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20221206165945.3551774-7-thierry.reding@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
drivers/mmc/host/sdhci-tegra.c
drivers/mmc/host/sdhci.c
drivers/mmc/host/sdhci.h