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Commit 3bfa6f03 authored by Scott Branden's avatar Scott Branden Committed by Ulf Hansson
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mmc: sdhci: add quirk for ACMD23 broken 



Add quirk to handle broken auto-CMD23.
Some controllers do not respond after the first auto-CMD23 is issued.

This allows CMD23 to still work (mandatory for the faster UHS-I mode)
rather than disabling CMD23 entirely via SDHCI_QUIRK2_HOST_NO_CMD23.

Signed-off by: Corneliu Doban <cdoban@broadcom.com>
Signed-off-by: default avatarScott Branden <sbranden@broadcom.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent eeed7026

drivers/mmc/host/sdhci.c

+2 −1
Original line number Diff line number Diff line
@@ -3164,7 +3164,8 @@ int sdhci_add_host(struct sdhci_host *host) 
	/* Auto-CMD23 stuff only works in ADMA or PIO. */

	if ((host->version >= SDHCI_SPEC_300) &&

	    ((host->flags & SDHCI_USE_ADMA) ||

	     !(host->flags & SDHCI_USE_SDMA))) {

	     !(host->flags & SDHCI_USE_SDMA)) &&

	     !(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) {

		host->flags |= SDHCI_AUTO_CMD23;

		DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));

	} else {

include/linux/mmc/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -115,6 +115,8 @@ struct sdhci_host { 
#define SDHCI_QUIRK2_TUNING_WORK_AROUND			(1<<12)

/* disable the block count for single block transactions */

#define SDHCI_QUIRK2_SUPPORT_SINGLE			(1<<13)

/* Controller broken with using ACMD23 */

#define SDHCI_QUIRK2_ACMD23_BROKEN			(1<<14)



	int irq;		/* Device IRQ */

	void __iomem *ioaddr;	/* Mapped address */