On 2 June 2015 at 09:09, Yangbo Lu <[email protected]> wrote: > 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.
Which voltage are you referring to? The I/O voltage or the power to the card? VCC or VCCQ? Kind regards Uffe > > 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
