diff options
| author | Erick Shepherd <erick.shepherd@ni.com> | 2025-03-31 17:13:37 -0500 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2025-05-14 16:59:16 +0200 |
| commit | 9510b38dc0ba358c93cbf5ee7c28820afb85937b (patch) | |
| tree | d3b3d88892c0f02a167757148a314d2bbce63416 /drivers/mmc/core/quirks.h | |
| parent | 7473647c350cfe9e071bfc2fa4ac5a3cc5ced8a0 (diff) | |
mmc: Add quirk to disable DDR50 tuning
Adds the MMC_QUIRK_NO_UHS_DDR50_TUNING quirk and updates
mmc_execute_tuning() to return 0 if that quirk is set. This fixes an
issue on certain Swissbit SD cards that do not support DDR50 tuning
where tuning requests caused I/O errors to be thrown.
Signed-off-by: Erick Shepherd <erick.shepherd@ni.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20250331221337.1414534-1-erick.shepherd@ni.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/quirks.h')
| -rw-r--r-- | drivers/mmc/core/quirks.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mmc/core/quirks.h b/drivers/mmc/core/quirks.h index 89b512905be1..7f893bafaa60 100644 --- a/drivers/mmc/core/quirks.h +++ b/drivers/mmc/core/quirks.h @@ -34,6 +34,16 @@ static const struct mmc_fixup __maybe_unused mmc_sd_fixups[] = { MMC_QUIRK_BROKEN_SD_CACHE | MMC_QUIRK_BROKEN_SD_POWEROFF_NOTIFY, EXT_CSD_REV_ANY), + /* + * Swissbit series S46-u cards throw I/O errors during tuning requests + * after the initial tuning request expectedly times out. This has + * only been observed on cards manufactured on 01/2019 that are using + * Bay Trail host controllers. + */ + _FIXUP_EXT("0016G", CID_MANFID_SWISSBIT, 0x5342, 2019, 1, + 0, -1ull, SDIO_ANY_ID, SDIO_ANY_ID, add_quirk_sd, + MMC_QUIRK_NO_UHS_DDR50_TUNING, EXT_CSD_REV_ANY), + END_FIXUP }; |