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 /include/linux/mmc | |
| 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 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/card.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 526fce581657..ddcdf23d731c 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -329,6 +329,7 @@ struct mmc_card { #define MMC_QUIRK_BROKEN_SD_CACHE (1<<15) /* Disable broken SD cache support */ #define MMC_QUIRK_BROKEN_CACHE_FLUSH (1<<16) /* Don't flush cache until the write has occurred */ #define MMC_QUIRK_BROKEN_SD_POWEROFF_NOTIFY (1<<17) /* Disable broken SD poweroff notify support */ +#define MMC_QUIRK_NO_UHS_DDR50_TUNING (1<<18) /* Disable DDR50 tuning */ bool written_flag; /* Indicates eMMC has been written since power on */ bool reenable_cmdq; /* Re-enable Command Queue */ |