| Message ID | 20170807160142.12134-5-kishon@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 07/08/17 19:01, Kishon Vijay Abraham I wrote: > TI's implementation of sdhci controller used in DRA7 SoC's uses > POWER_CONTROL register for configuring IO voltage and not > for core voltage (vdd) which is it's intended use. Add a quirk > to indicate broken POWER_CONTROL register. A quirk isn't needed for this. Use the ->set_power() callback instead. > > Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> > --- > drivers/mmc/host/sdhci.c | 6 ++++++ > drivers/mmc/host/sdhci.h | 2 ++ > 2 files changed, 8 insertions(+) > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index d5050ec42481..a7465a56e6b5 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -1419,6 +1419,9 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, > > mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); > > + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) > + return; > + > if (mode != MMC_POWER_OFF) > sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); > else > @@ -1430,6 +1433,9 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, > { > u8 pwr = 0; > > + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) > + return; > + > if (mode != MMC_POWER_OFF) { > switch (1 << vdd) { > case MMC_VDD_165_195: > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index 39c7a2723906..ba94cca7c892 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -439,6 +439,8 @@ struct sdhci_host { > #define SDHCI_QUIRK2_NO_CRC_STRIPPING (1<<16) > /* Controller has bad caps bits, but really supports DMA */ > #define SDHCI_QUIRK2_FORCE_ADMA (1<<17) > +/* Controller uses POWER_CONTROL for managing IO voltage and not core voltage */ > +#define SDHCI_QUIRK2_BROKEN_POWER_CONTROL (1<<18) > > int irq; /* Device IRQ */ > void __iomem *ioaddr; /* Mapped address */ > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday 15 August 2017 01:11 PM, Adrian Hunter wrote: > On 07/08/17 19:01, Kishon Vijay Abraham I wrote: >> TI's implementation of sdhci controller used in DRA7 SoC's uses >> POWER_CONTROL register for configuring IO voltage and not >> for core voltage (vdd) which is it's intended use. Add a quirk >> to indicate broken POWER_CONTROL register. > > A quirk isn't needed for this. Use the ->set_power() callback instead. sure! Thanks Kishon > >> >> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> >> --- >> drivers/mmc/host/sdhci.c | 6 ++++++ >> drivers/mmc/host/sdhci.h | 2 ++ >> 2 files changed, 8 insertions(+) >> >> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c >> index d5050ec42481..a7465a56e6b5 100644 >> --- a/drivers/mmc/host/sdhci.c >> +++ b/drivers/mmc/host/sdhci.c >> @@ -1419,6 +1419,9 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, >> >> mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); >> >> + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) >> + return; >> + >> if (mode != MMC_POWER_OFF) >> sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); >> else >> @@ -1430,6 +1433,9 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, >> { >> u8 pwr = 0; >> >> + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) >> + return; >> + >> if (mode != MMC_POWER_OFF) { >> switch (1 << vdd) { >> case MMC_VDD_165_195: >> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h >> index 39c7a2723906..ba94cca7c892 100644 >> --- a/drivers/mmc/host/sdhci.h >> +++ b/drivers/mmc/host/sdhci.h >> @@ -439,6 +439,8 @@ struct sdhci_host { >> #define SDHCI_QUIRK2_NO_CRC_STRIPPING (1<<16) >> /* Controller has bad caps bits, but really supports DMA */ >> #define SDHCI_QUIRK2_FORCE_ADMA (1<<17) >> +/* Controller uses POWER_CONTROL for managing IO voltage and not core voltage */ >> +#define SDHCI_QUIRK2_BROKEN_POWER_CONTROL (1<<18) >> >> int irq; /* Device IRQ */ >> void __iomem *ioaddr; /* Mapped address */ >> > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index d5050ec42481..a7465a56e6b5 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1419,6 +1419,9 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) + return; + if (mode != MMC_POWER_OFF) sdhci_writeb(host, SDHCI_POWER_ON, SDHCI_POWER_CONTROL); else @@ -1430,6 +1433,9 @@ void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, { u8 pwr = 0; + if (host->quirks2 & SDHCI_QUIRK2_BROKEN_POWER_CONTROL) + return; + if (mode != MMC_POWER_OFF) { switch (1 << vdd) { case MMC_VDD_165_195: diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 39c7a2723906..ba94cca7c892 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -439,6 +439,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_NO_CRC_STRIPPING (1<<16) /* Controller has bad caps bits, but really supports DMA */ #define SDHCI_QUIRK2_FORCE_ADMA (1<<17) +/* Controller uses POWER_CONTROL for managing IO voltage and not core voltage */ +#define SDHCI_QUIRK2_BROKEN_POWER_CONTROL (1<<18) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */
TI's implementation of sdhci controller used in DRA7 SoC's uses POWER_CONTROL register for configuring IO voltage and not for core voltage (vdd) which is it's intended use. Add a quirk to indicate broken POWER_CONTROL register. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> --- drivers/mmc/host/sdhci.c | 6 ++++++ drivers/mmc/host/sdhci.h | 2 ++ 2 files changed, 8 insertions(+)