Commit 3853a042 authored by Adrian Hunter's avatar Adrian Hunter Committed by Ulf Hansson
Browse files

mmc: core: Record card drive strength 



In preparation for adding drive strength support
for eMMC, add drive_strength to struct mmc_card
to record the card drive strength for UHS-I modes
and HS200 / HS400. For eMMC this will be needed
when switching between HS200 and HS400.

Signed-off-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e23350b3

drivers/mmc/core/sd.c

+3 −0
Original line number Diff line number Diff line
@@ -389,6 +389,8 @@ static int sd_select_driver_type(struct mmc_card *card, u8 *status) 
	int card_drv_type, drive_strength, drv_type;

	int err;



	card->drive_strength = 0;



	card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;



	drive_strength = mmc_select_drive_strength(card,
@@ -404,6 +406,7 @@ static int sd_select_driver_type(struct mmc_card *card, u8 *status) 
				mmc_hostname(card->host));

			return 0;

		}

		card->drive_strength = drive_strength;

	}



	if (drv_type)

drivers/mmc/core/sdio.c

+3 −0
Original line number Diff line number Diff line
@@ -406,6 +406,8 @@ static void sdio_select_driver_type(struct mmc_card *card) 
	unsigned char card_strength;

	int err;



	card->drive_strength = 0;



	card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;



	drive_strength = mmc_select_drive_strength(card,
@@ -427,6 +429,7 @@ static void sdio_select_driver_type(struct mmc_card *card) 
				       card_strength, NULL);

		if (err)

			return;

		card->drive_strength = drive_strength;

	}



	if (drv_type)

include/linux/mmc/card.h

+1 −0
Original line number Diff line number Diff line
@@ -305,6 +305,7 @@ struct mmc_card { 


	unsigned int		sd_bus_speed;	/* Bus Speed Mode set for the card */

	unsigned int		mmc_avail_type;	/* supported device type by both host and card */

	unsigned int		drive_strength;	/* for UHS-I, HS200 or HS400 */



	struct dentry		*debugfs_root;

	struct mmc_part	part[MMC_NUM_PHY_PARTITION]; /* physical partitions */

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