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Commit c5075a10 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Pierre Ossman
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sdhci: Add support for hosts reporting inverted write-protect state 



This patch adds SDHCI_QUIRK_INVERTED_WRITE_PROTECT quirk. When
specified, the sdhci driver will invert WP state.

p.s. Actually, the quirk is more board-specific than
     controller-specific.

Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent 68d1fb7e

drivers/mmc/host/sdhci.c

+2 −0
Original line number Diff line number Diff line
@@ -1149,6 +1149,8 @@ static int sdhci_get_ro(struct mmc_host *mmc) 


	spin_unlock_irqrestore(&host->lock, flags);



	if (host->quirks & SDHCI_QUIRK_INVERTED_WRITE_PROTECT)

		return !!(present & SDHCI_WRITE_PROTECT);

	return !(present & SDHCI_WRITE_PROTECT);

}

drivers/mmc/host/sdhci.h

+2 −0
Original line number Diff line number Diff line
@@ -216,6 +216,8 @@ struct sdhci_host { 
#define SDHCI_QUIRK_NO_BUSY_IRQ				(1<<14)

/* Controller has unreliable card detection */

#define SDHCI_QUIRK_BROKEN_CARD_DETECTION		(1<<15)

/* Controller reports inverted write-protect state */

#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT		(1<<16)



	int			irq;		/* Device IRQ */

	void __iomem *		ioaddr;		/* Mapped address */