| Message ID | 20211206131507.411-2-fred.ai@bayhubtech.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [[PATCH,V2] 2/2] mmc:sdhci-pci-o2micro:Change implementation of setting corresponding PLL frequency according to card mode | expand |
On 06/12/2021 15:15, fred wrote: > From: "fred.ai" <fred.ai@bayhubtech.com> > > Driver will set PLL frequency by different card mode > 1.SD2.0 and SDR50 card mode base clock frequency is 208MHz > 2.SDR104 card mode base clock frequency is 200MHz Again the subject needs improvement, should have been like: [PATCH V2 2/2] mmc: sdhci-pci-o2micro: Change implementation of setting corresponding PLL frequency according to card mode > > Signed-off-by: fred.ai <fred.ai@bayhubtech.com> > > Change in V2: > --- This '---' here causes the "Change in V2:" alone to be in the commit message. Better to put it after the signed-off line. > After SD2.0 or SDR50 card initlization, driver will select base clock frequency 200MHz > by setting PLL frequency value 0x2510. > --- > drivers/mmc/host/sdhci-pci-o2micro.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c > index 98c1a17eb619..4d79fda10dcb 100644 > --- a/drivers/mmc/host/sdhci-pci-o2micro.c > +++ b/drivers/mmc/host/sdhci-pci-o2micro.c > @@ -569,8 +569,16 @@ static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock) > if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { > pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); > > + /* SDR104 card mode PLL frequency value is 0x2c28 */ > if ((scratch_32 & 0xFFFF0000) != 0x2c280000) > o2_pci_set_baseclk(chip, 0x2c280000); > + > + } else { > + pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); > + > + /* SD2.0,SDR50 card mode PLL frequency value is 0X2510 */ > + if ((scratch_32 & 0xFFFF0000) != 0x2510000) > + o2_pci_set_baseclk(chip, 0x25100000); > } > > pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32); >
diff --git a/drivers/mmc/host/sdhci-pci-o2micro.c b/drivers/mmc/host/sdhci-pci-o2micro.c index 98c1a17eb619..4d79fda10dcb 100644 --- a/drivers/mmc/host/sdhci-pci-o2micro.c +++ b/drivers/mmc/host/sdhci-pci-o2micro.c @@ -569,8 +569,16 @@ static void sdhci_pci_o2_set_clock(struct sdhci_host *host, unsigned int clock) if ((host->timing == MMC_TIMING_UHS_SDR104) && (clock == 200000000)) { pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); + /* SDR104 card mode PLL frequency value is 0x2c28 */ if ((scratch_32 & 0xFFFF0000) != 0x2c280000) o2_pci_set_baseclk(chip, 0x2c280000); + + } else { + pci_read_config_dword(chip->pdev, O2_SD_PLL_SETTING, &scratch_32); + + /* SD2.0,SDR50 card mode PLL frequency value is 0X2510 */ + if ((scratch_32 & 0xFFFF0000) != 0x2510000) + o2_pci_set_baseclk(chip, 0x25100000); } pci_read_config_dword(chip->pdev, O2_SD_OUTPUT_CLK_SOURCE_SWITCH, &scratch_32);