When a board does not have the WP line wired at all, the card may be detected as read-only. Add a quirk and a device property to disable WP detection. Signed-off-by: Mike Looijmans <mike.looijmans@xxxxxxxx> --- drivers/mmc/host/sdhci-pltfm.c | 3 +++ drivers/mmc/host/sdhci.c | 3 ++- include/linux/mmc/sdhci.h | 2 ++ 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c index e2065a4..9e83ada 100644 --- a/drivers/mmc/host/sdhci-pltfm.c +++ b/drivers/mmc/host/sdhci-pltfm.c @@ -83,6 +83,9 @@ void sdhci_get_of_property(struct platform_device *pdev) if (sdhci_of_wp_inverted(np)) host->quirks |= SDHCI_QUIRK_INVERTED_WRITE_PROTECT; + if (of_get_property(np, "disable-wp", NULL)) + host->quirks2 |= SDHCI_QUIRK2_DISABLE_WP; + if (of_get_property(np, "broken-cd", NULL)) host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 7a7fb4f..68f47fc 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1635,7 +1635,8 @@ static int sdhci_check_ro(struct sdhci_host *host) spin_lock_irqsave(&host->lock, flags); - if (host->flags & SDHCI_DEVICE_DEAD) + if ((host->flags & SDHCI_DEVICE_DEAD) || + (host->quirks2 & SDHCI_QUIRK2_DISABLE_WP)) is_readonly = 0; else if (host->ops->get_ro) is_readonly = host->ops->get_ro(host); diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index 3e781b8..967dba0 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -98,6 +98,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON (1<<4) /* Controller has a non-standard host control register */ #define SDHCI_QUIRK2_BROKEN_HOST_CONTROL (1<<5) +/* Controller lacks write protect detection */ +#define SDHCI_QUIRK2_DISABLE_WP (1<<6) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html