Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d1955c3a authored by Suneel Garapati's avatar Suneel Garapati Committed by Ulf Hansson
Browse files

mmc: sdhci: add quirk SDHCI_QUIRK_CLOCK_DIV_ZERO_BROKEN 



adds quirk for controllers whose clock divider zero is broken,
sdhci_set_clock function will incorporate this modification.

Signed-off-by: default avatarSuneel Garapati <suneel.garapati@xilinx.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 6464b714

drivers/mmc/host/sdhci.c

+3 −0
Original line number Diff line number Diff line
@@ -1210,6 +1210,9 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock) 
			}

			real_div = div;

			div >>= 1;

			if ((host->quirks2 & SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN)

				&& !div && host->max_clk <= 25000000)

				div = 1;

		}

	} else {

		/* Version 2.00 divisors must be a power of 2. */

drivers/mmc/host/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -409,6 +409,8 @@ struct sdhci_host { 
#define SDHCI_QUIRK2_SUPPORT_SINGLE			(1<<13)

/* Controller broken with using ACMD23 */

#define SDHCI_QUIRK2_ACMD23_BROKEN			(1<<14)

/* Broken Clock divider zero in controller */

#define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN		(1<<15)



	int irq;		/* Device IRQ */

	void __iomem *ioaddr;	/* Mapped address */