This quirk is used for controllers that can only support 1.8V voltage but the peripheral hardware circuit has capability to support 3.3V voltage.
Signed-off-by: Yangbo Lu <[email protected]> --- drivers/mmc/host/sdhci.c | 3 +++ drivers/mmc/host/sdhci.h | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c80287a..40de0d3 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2959,6 +2959,9 @@ int sdhci_add_host(struct sdhci_host *host) host->caps1 : sdhci_readl(host, SDHCI_CAPABILITIES_1); + if (host->quirks2 & SDHCI_QUIRK2_CIRCUIT_SUPPORT_VS33) + caps[0] = caps[0] | SDHCI_CAN_VDD_330; + if (host->quirks & SDHCI_QUIRK_FORCE_DMA) host->flags |= SDHCI_USE_SDMA; else if (!(caps[0] & SDHCI_CAN_DO_SDMA)) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index e639b7f..2704daf1 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -409,6 +409,10 @@ struct sdhci_host { #define SDHCI_QUIRK2_SUPPORT_SINGLE (1<<13) /* Controller broken with using ACMD23 */ #define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14) +/* Controller only supports 1.8V, but the peripheral hardware + * circuit has capability to support 3.3V + */ +#define SDHCI_QUIRK2_CIRCUIT_SUPPORT_VS33 (1<<15) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ -- 2.1.0.27.g96db324 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
