diff options
Diffstat (limited to 'drivers/mmc/host/mmci.h')
| -rw-r--r-- | drivers/mmc/host/mmci.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index d437ccf62d6..c2b33326547 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -60,6 +60,13 @@ #define MCI_ST_DPSM_RWMOD (1 << 10) #define MCI_ST_DPSM_SDIOEN (1 << 11) /* Control register extensions in the ST Micro Ux500 versions */ +/* + * DMA request control is required for write + * if transfer size is not 32 byte aligned. + * DMA request control is also needed if the total + * transfer size is 32 byte aligned but any of the + * sg element lengths are not aligned with 32 byte. + */ #define MCI_ST_DPSM_DMAREQCTL (1 << 12) #define MCI_ST_DPSM_DBOOTMODEEN (1 << 13) #define MCI_ST_DPSM_BUSYMODE (1 << 14) |