On 04/09/2013 06:41 PM, Jagan Teki wrote: > Hi Tushar, > > On Mon, Apr 8, 2013 at 9:22 AM, Tushar Behera <tushar.beh...@linaro.org> > wrote: >> On 04/07/2013 10:27 AM, Jagan Teki wrote: >>> Hi, >>> >>> I saw that you have been added the SDHCI_QUIRK_WAIT_SEND_CMD on below commit >>> http://git.denx.de/?p=u-boot.git;a=commitdiff;h=13243f2eafc4292917178051fe1bb5aab2774dca >>> >>> I need few quires regarding the QUIRK delay. >>> 1. Why the delay is 1000 >>> + if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD) >>> + udelay(1000); >>> + >>> 2. is this delay specific to s5p_sdhci controller? >> > > BTW: > Can you please help me out what is the reason for max and min clocks > are at 52000000 and 400000 respectively. > > As per my knowledge the max clock of sdhci on spec-2 is 50000000 > (50Mhz), I may be in correct. Right..But eMMC can use up to 52MHz. And see into the drivers/mmc/mmc.c..SD-card's max_dtr is set to 50MHz, if card is supported HS_MODE. > > Request for your help. > > Thanks, > Jagan. > >> This was specific to s5p_sdhci driver so as to replicate the behavior of >> s5p_mmc driver. >> >>> 3. I have an issue "Controller never released inhibit bit(s)" >>> but when I enable this quirk on my driver with udelay(10000), it's >>> working. >> >> I am not sure about the exact delay as per the spec. I have added >> Jaehoon to CC who might have additional information about this. >> >>> >>> Could you please help me. >>> >>> Thanks, >>> Jagan. >>> >> >> >> -- >> Tushar Behera >
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