Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0eb34b9b authored by Veerabhadrarao Badiganti's avatar Veerabhadrarao Badiganti
Browse files

mmc: core: Enable HS mode first in the device and then in the host 



While switching to HS mode, high speed mode timing should be selected
in the device before changing the clock frequency in the host.

But present driver first updates the frequency in host and then selects
HS mode in device while selecting HS400 mode. This is a spec violation.
Updated the sequence to comply with spec.

Change-Id: I5b2c1f724d820daf9c0bca8651cf85bd0ff67655
Signed-off-by: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
parent c9a27f75

drivers/mmc/core/mmc.c

+3 −3
Original line number Diff line number Diff line
@@ -1160,9 +1160,6 @@ static int mmc_select_hs400(struct mmc_card *card) 
	 * Before switching to dual data rate operation for HS400,

	 * it is required to convert from HS200 mode to HS mode.

	 */

	mmc_set_timing(card->host, MMC_TIMING_MMC_HS);

	mmc_set_bus_speed(card);



	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,

			   EXT_CSD_HS_TIMING, EXT_CSD_TIMING_HS,

			   card->ext_csd.generic_cmd6_time,
@@ -1173,6 +1170,9 @@ static int mmc_select_hs400(struct mmc_card *card) 
		return err;

	}



	mmc_set_timing(card->host, MMC_TIMING_MMC_HS);

	mmc_set_bus_speed(card);



	val = EXT_CSD_DDR_BUS_WIDTH_8;

	if (card->ext_csd.strobe_support) {

		err = mmc_select_bus_width(card);