diff options
| author | Diego Santa Cruz <Diego.SantaCruz@spinetix.com> | 2014-12-23 10:50:25 +0100 |
|---|---|---|
| committer | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2015-01-19 17:02:29 +0200 |
| commit | 037dc0ab5dff36984d97735987dff01a7ec73893 (patch) | |
| tree | 44d5c457ea5ee33b65ca061b3a57ac515a52d938 /drivers/mmc/mmc.c | |
| parent | a4ff9f83f5f902717e87c05cf9d2d02b472d4257 (diff) | |
mmc: read the high capacity WP group size for eMMC
Read the eMMC high capacity write protect group size at mmc device
initialization. This is useful to correctly partition an eMMC device,
as partitions need to be aligned to this size.
Signed-off-by: Diego Santa Cruz <Diego.SantaCruz@spinetix.com>
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index be211016cf..16a7a90398 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1065,7 +1065,9 @@ static int mmc_startup(struct mmc *mmc) return err; else ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1; + } + if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) { /* Read out group size from ext_csd */ mmc->erase_grp_size = ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024; @@ -1092,6 +1094,10 @@ static int mmc_startup(struct mmc *mmc) mmc->erase_grp_size = (erase_gsz + 1) * (erase_gmul + 1); } + + mmc->hc_wp_grp_size = 1024 + * ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] + * ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; } err = mmc_set_capacity(mmc, mmc->part_num); |