Hi Doug, On 08/24/2013 05:40 AM, Doug Anderson wrote: > Jaehoon, > > On Fri, Aug 23, 2013 at 6:21 AM, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote: >> Hi Doug, >> >> If the clock-gating is enabled, then maybe it's continuously printed the kernel message for Bus_speed. > > Can you explain? I don't think dw_mmc has support for clock gating > right now. ...or are there some patches that I'm not aware of? I > could believe that if you've got some non-upstream clock gating > patches that these would need to be modified to handle it... ...but > unless those are slated to land upstream it seems like I can't take > them into account, can I? If i enabled the CONFIG_MMC_CLK_GATE, the i have found the below message whenever some operation is run. I will test more with your patch. [ 6.335000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.345000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.355000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.365000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.375000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.480000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.490000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.500000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.530000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.535000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) [ 6.545000] mmc_host mmc1: Bus speed (slot 0) = 100000000Hz (slot req 52000000Hz, actual 50000000HZ div = 1) Best Regards, Jaehoon Chung > > Thanks! > > -Doug > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
