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mmc: core: add driver strength selection when selecting hs400es 

The driver strength selection is missed and required when selecting
hs400es. So, It is added here.

Fixes: 81ac2af657 ("mmc: core: implement enhanced strobe support")
Cc: stable@vger.kernel.org
Signed-off-by: Hankyung Yu <hankyung.yu@lge.com>
Signed-off-by: Chanho Min <chanho.min@lge.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chanho Min 2017-09-26 09:03:40 +09:00 committed by Ulf Hansson
parent 9e66317d3c
commit fb458864d9
1 changed files with 19 additions and 17 deletions
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36
drivers/mmc/core/mmc.c
View File

@ -1286,6 +1286,23 @@ out_err:
return err;
}
static void mmc_select_driver_type(struct mmc_card *card)
{
int card_drv_type, drive_strength, drv_type;
card_drv_type = card->ext_csd.raw_driver_strength |
mmc_driver_type_mask(0);
drive_strength = mmc_select_drive_strength(card,
card->ext_csd.hs200_max_dtr,
card_drv_type, &drv_type);
card->drive_strength = drive_strength;
if (drv_type)
mmc_set_driver_type(card->host, drv_type);
}
static int mmc_select_hs400es(struct mmc_card *card)
{
struct mmc_host *host = card->host;
@ -1341,6 +1358,8 @@ static int mmc_select_hs400es(struct mmc_card *card)
goto out_err;
}
mmc_select_driver_type(card);
/* Switch card to HS400 */
val = EXT_CSD_TIMING_HS400 |
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
@ -1374,23 +1393,6 @@ out_err:
return err;
}
static void mmc_select_driver_type(struct mmc_card *card)
{
int card_drv_type, drive_strength, drv_type;
card_drv_type = card->ext_csd.raw_driver_strength |
mmc_driver_type_mask(0);
drive_strength = mmc_select_drive_strength(card,
card->ext_csd.hs200_max_dtr,
card_drv_type, &drv_type);
card->drive_strength = drive_strength;
if (drv_type)
mmc_set_driver_type(card->host, drv_type);
}
/*
* For device supporting HS200 mode, the following sequence
* should be done before executing the tuning process.