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mmc: core: add high-capacity erase size capability flag 

Let drivers specify the use of high-capacity erase size.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
hifive-unleashed-5.1
Adrian Hunter 2012-03-13 05:19:13 -04:00 committed by Chris Ball
parent 2cecdf0023
commit 83bb24aaa4
2 changed files with 3 additions and 1 deletions
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3
drivers/mmc/core/mmc.c
View File

@ -952,7 +952,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
* If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
* bit. This bit will be lost every time after a reset or power off.
*/
if (card->ext_csd.enhanced_area_en) {
if (card->ext_csd.enhanced_area_en ||
(card->ext_csd.rev >= 3 && (host->caps2 & MMC_CAP2_HC_ERASE_SZ))) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_ERASE_GROUP_DEF, 1,
card->ext_csd.generic_cmd6_time);

1
include/linux/mmc/host.h
View File

@ -236,6 +236,7 @@ struct mmc_host {
MMC_CAP2_HS200_1_2V_SDR)
#define MMC_CAP2_BROKEN_VOLTAGE (1 << 7) /* Use the broken voltage */
#define MMC_CAP2_DETECT_ON_ERR (1 << 8) /* On I/O err check card removal */
#define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */
mmc_pm_flag_t pm_caps; /* supported pm features */
unsigned int power_notify_type;