Commit 83cc16d7 authored by Dong Aisheng's avatar Dong Aisheng Committed by Chris Ball
Browse files

mmc: core: mmc DDR mode should not depend on UHS_DDR50 



The MMC_CAP_UHS_DDR50 must work on 1.8v.
However, the eMMC DDR mode can work on either 1.8v or 3.3v and
should not depend on UHS_DDR50.
So get rid of this limitation to let controller without 1.8v
signal voltage support can also work for eMMC DDR mode if it claims.

Signed-off-by: default avatarDong Aisheng <b29396@freescale.com>
Acked-by: default avatarShawn Guo <shawn.guo@linaro.org>
Acked-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent e2997c94

drivers/mmc/core/mmc.c

+2 −6
Original line number Diff line number Diff line
@@ -1119,14 +1119,10 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, 
	 */

	if (mmc_card_highspeed(card)) {

		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)

			&& ((host->caps & (MMC_CAP_1_8V_DDR |

			     MMC_CAP_UHS_DDR50))

				== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))

			&& (host->caps & MMC_CAP_1_8V_DDR))

				ddr = MMC_1_8V_DDR_MODE;

		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)

			&& ((host->caps & (MMC_CAP_1_2V_DDR |

			     MMC_CAP_UHS_DDR50))

				== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))

			&& (host->caps & MMC_CAP_1_2V_DDR))

				ddr = MMC_1_2V_DDR_MODE;

	}

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