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Subject[PATCH 06/13] 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: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/mmc/host/sdhci.c | 2 ++
drivers/mmc/host/sdhci.h | 2 ++
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 782fb58..d668625 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1202,6 +1202,8 @@ 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);
}

diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index b10920d..051fef5 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -219,6 +219,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_NO_BUSY_IRQ (1<<15)
/* Controller has unreliable card detection */
#define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<16)
+/* Controller reports inverted write-protect state */
+#define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<17)

int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */
--
1.5.6.5


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