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Commit ef29c0e2 authored by Shawn Lin's avatar Shawn Lin Committed by Ulf Hansson
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mmc: core: add mmc-hs400-enhanced-strobe support 



This patch introduce mmc-hs400-enhanced-strobe for platforms
which want to enable enhanced strobe function from DT if the
mmc host controller claims to support enhanced strobe.

Signed-off-by: default avatarShawn Lin <shawn.lin@rock-chips.com>

Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Tested-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent a60119ce

drivers/mmc/core/host.c

+2 −0
Original line number Diff line number Diff line
@@ -313,6 +313,8 @@ int mmc_of_parse(struct mmc_host *host) 
		host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR;

	if (of_property_read_bool(np, "mmc-hs400-1_2v"))

		host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR;

	if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe"))

		host->caps2 |= MMC_CAP2_HS400_ES;



	host->dsr_req = !of_property_read_u32(np, "dsr", &host->dsr);

	if (host->dsr_req && (host->dsr & ~0xffff)) {

include/linux/mmc/host.h

+1 −0
Original line number Diff line number Diff line
@@ -302,6 +302,7 @@ struct mmc_host { 
#define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)

#define MMC_CAP2_NO_WRITE_PROTECT (1 << 18)	/* No physical write protect pin, assume that card is always read-write */

#define MMC_CAP2_NO_SDIO	(1 << 19)	/* Do not send SDIO commands during initialization */

#define MMC_CAP2_HS400_ES	(1 << 20)	/* Host supports enhanced strobe */



	mmc_pm_flag_t		pm_caps;	/* supported pm features */