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Commit a06fbc96 authored by Asutosh Das's avatar Asutosh Das Committed by Stephen Boyd
Browse files

mmc: sdhci-msm: ignore data-end-bit error in 1 bit mode 



Some SDHC controllers are unable to handle data end-bit
errors in one bit mode.
This patch adds a quirk to ignore data-end-bit error in
1-bit mode in Qualcomm SDHC controllers.

Change-Id: Ica0f10573d654021449c32197b126e12bb1a3c10
Signed-off-by: default avatarAsutosh Das <asutoshd@codeaurora.org>
parent 0ddfedec

drivers/mmc/host/sdhci-msm.c

+2 −0
Original line number Diff line number Diff line
@@ -2477,6 +2477,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) 
		host->quirks2 |= SDHCI_QUIRK2_RDWR_TX_ACTIVE_EOT;

	}



	host->quirks2 |= SDHCI_QUIRK2_IGN_DATA_END_BIT_ERROR;



	/* Setup PWRCTL irq */

	msm_host->pwr_irq = platform_get_irq_byname(pdev, "pwr_irq");

	if (msm_host->pwr_irq < 0) {

drivers/mmc/host/sdhci.c

+2 −0
Original line number Diff line number Diff line
@@ -3749,6 +3749,8 @@ int sdhci_add_host(struct sdhci_host *host) 
		host->async_int_supp = true;

	mmc_add_host(mmc);



	if (host->quirks2 & SDHCI_QUIRK2_IGN_DATA_END_BIT_ERROR)

		sdhci_clear_set_irqs(host, SDHCI_INT_DATA_END_BIT, 0);

	pr_info("%s: SDHCI controller on %s [%s] using %s\n",

		mmc_hostname(mmc), host->hw_name, dev_name(mmc_dev(mmc)),

		(host->flags & SDHCI_USE_ADMA) ? "ADMA" :

include/linux/mmc/sdhci.h

+5 −0
Original line number Diff line number Diff line
@@ -164,6 +164,11 @@ struct sdhci_host { 
 */

#define SDHCI_QUIRK2_DIVIDE_TOUT_BY_4 (1 << 12)



/*

 * Some SDHC controllers are unable to handle data-end bit error in

 * 1-bit mode of SDIO.

 */

#define SDHCI_QUIRK2_IGN_DATA_END_BIT_ERROR             (1<<9)

	int irq;		/* Device IRQ */

	void __iomem *ioaddr;	/* Mapped address */