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Commit 7a7528c0 authored by Venkat Gopalakrishnan's avatar Venkat Gopalakrishnan
Browse files

mmc: core: Fix power class config for HS400 



Use the correct power class field from the extended CSD register
for HS400 mode as defined in the eMMC5.0 specification.

CRs-fixed: 690341
Change-Id: Ie10e35941fd3c6ee49c686f721bf5af6fcd74862
Signed-off-by: default avatarVenkat Gopalakrishnan <venkatg@codeaurora.org>
parent acdce027

drivers/mmc/core/mmc.c

+4 −6
Original line number Diff line number Diff line
@@ -763,9 +763,7 @@ static int mmc_select_powerclass(struct mmc_card *card, 
				EXT_CSD_PWR_CL_52_195 :

				EXT_CSD_PWR_CL_DDR_52_195;

		else if (host->ios.clock <= 200000000)

			index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?

				EXT_CSD_PWR_CL_200_195 :

				EXT_CSD_PWR_CL_DDR_200_195;

			index = EXT_CSD_PWR_CL_200_195;

		break;

	case MMC_VDD_27_28:

	case MMC_VDD_28_29:
@@ -783,9 +781,9 @@ static int mmc_select_powerclass(struct mmc_card *card, 
				EXT_CSD_PWR_CL_52_360 :

				EXT_CSD_PWR_CL_DDR_52_360;

		else if (host->ios.clock <= 200000000)

			index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?

				EXT_CSD_PWR_CL_200_360 :

				EXT_CSD_PWR_CL_DDR_200_360;

			index = (bus_width == EXT_CSD_DDR_BUS_WIDTH_8) ?

				EXT_CSD_PWR_CL_DDR_200_360 :

				EXT_CSD_PWR_CL_200_360;

		break;

	default:

		pr_warning("%s: Voltage range not supported "

include/linux/mmc/mmc.h

+1 −2
Original line number Diff line number Diff line
@@ -270,8 +270,7 @@ struct _mmc_csd { 
#define EXT_CSD_POWER_OFF_LONG_TIME	247	/* RO */

#define EXT_CSD_GENERIC_CMD6_TIME	248	/* RO */

#define EXT_CSD_CACHE_SIZE		249	/* RO, 4 bytes */

#define EXT_CSD_PWR_CL_DDR_200_195	253	/* RO */

#define EXT_CSD_PWR_CL_DDR_200_360	254	/* RO */

#define EXT_CSD_PWR_CL_DDR_200_360	253	/* RO */

#define EXT_CSD_TAG_UNIT_SIZE		498	/* RO */

#define EXT_CSD_DATA_TAG_SUPPORT	499	/* RO */

#define EXT_CSD_MAX_PACKED_WRITES	500	/* RO */