Hi Ulf, Dong On Mon, Jun 8, 2015 at 2:08 PM, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > On 8 June 2015 at 10:37, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: >> [...] >> >>>> > >>>> > Can you test this patch on imx SoC ? >>>> > >>>> >>>> (Your email have some format issue.) >>> >>> Yeah missed to sent in plain text mode. >>> >>>> >>>> I have tested this patch and it does not break imx SoC. >>>> You can add my tag. >>>> Tested-by: Dong Aisheng <aisheng.dong@xxxxxxxxxxxxx> >>> >>> Thanks Dong !! >>> >>>> >>>> However, it looks to me SDHCI_CAN_VDD_180 is only indicating the host VDD >>>> capabiliies, not IO voltage capability. >> >> I think Dong is correct. I don't think SDHCI_CAN_VDD_180 is not > > /s /is not /is > >> related to UHS modes at all. >> >> At least the name of the field (SDHCI_CAN_VDD_180) indicates it's >> about VDD/VCC, the core power and not the IO voltage. >> >>> Are you sure on this ?? If SDHCI host VDD is 1.8V then the cards are >>> also capable to operate at 1.8V ? Didn't understand what you mean by >>> IO voltage capability >>> >>> >>>> SD3.0 cards require 1.8v IO voltage support. >>>> So should this bit affect SD3.0 support? >>> >>> The preset value resgister says that SDR modes requires 1.8V and we >>> disable the modes based on capability or quirk. >> >> It requires 1.8V *IO voltage*, not VDD/VCC. I agree on this now . I will post a version where this quirk will be added for arasan 4.9a that doesn't support 1.8v voltage signalling. >> >> [...] >> >> Kind regards >> Uffe -- Thanks, with regards, Suman Tripathi -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
