diff options
| author | Prathamesh Shete <pshete@nvidia.com> | 2022-12-06 17:59:45 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2022-12-07 13:30:25 +0100 |
| commit | acc13958c2b2623c17e2450b8cd6881b698756d3 (patch) | |
| tree | 7f1be98ffac7b3997c376f297c282fb03b9912eb /drivers/mmc/host/sdhci.c | |
| parent | 03813c81e62559489afa1b461ab159b5641d66f8 (diff) | |
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>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index edf052ccb176..f3af1bd0f7b9 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -270,6 +270,11 @@ enum sdhci_reset_reason { static void sdhci_reset_for_reason(struct sdhci_host *host, enum sdhci_reset_reason reason) { + if (host->quirks2 & SDHCI_QUIRK2_ISSUE_CMD_DAT_RESET_TOGETHER) { + sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + return; + } + switch (reason) { case SDHCI_RESET_FOR_INIT: sdhci_do_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); |