Hi Jaehoon, On 06/04/21 3:48 am, Jaehoon Chung wrote: > Hi, > > On 4/5/21 11:44 PM, Aswath Govindraju wrote: >> From: Faiz Abbas <[email protected]> >> >> Enable HS400 speed mode by writing to HOST_CONTROL2 register. > > I didn't find HS400 bit at HOST_CONTROL2 register. (I have checked SD > Specific v4.20) > If I missed something, let me know, plz. > > In include/sdhci.h, it mentioned to "Non-standard". >
Thank you for pointing this out. Yes, this is not a part of SD specification and in the specification this field is marked as reserved. I have added this, as this bit mask has been defined in include/sdhci.h. Sorry about this. I'll post a respin taking this into a consideration. Thanks, Aswath > Best Regards, > Jaehoon Chung > >> >> Signed-off-by: Faiz Abbas <[email protected]> >> Signed-off-by: Aswath Govindraju <[email protected]> >> --- >> drivers/mmc/sdhci.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >> diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c >> index d9ab6a0a839e..eea4701d8af5 100644 >> --- a/drivers/mmc/sdhci.c >> +++ b/drivers/mmc/sdhci.c >> @@ -507,6 +507,9 @@ void sdhci_set_uhs_timing(struct sdhci_host *host) >> case MMC_HS_200: >> reg |= SDHCI_CTRL_UHS_SDR104; >> break; >> + case MMC_HS_400: >> + reg |= SDHCI_CTRL_HS400; >> + break; >> default: >> reg |= SDHCI_CTRL_UHS_SDR12; >> } >> >
