On Wed, Aug 6, 2014 at 10:27 AM, Jean-Michel Hautbois <jean-michel.hautbois@xxxxxxxxxxx> wrote: > 2014-08-06 13:44 GMT+02:00 Jaehoon Chung <jh80.chung@xxxxxxxxxxx>: >> Hi, > > Hi Jaehoon, > >> In my case, -84 error is related with timing. >> I recommend to check your clock source or pin strength. > > Thanks for this advice. > In fact, it seems that the clock is not correct, as stated by the kernel : > > $> cat /sys/kernel/debug/mmc1/ios > clock: 52000000 Hz > actual clock: 49500000 Hz > > But I can't find out why because the clock comes on the SD4_CLK pin, > and this is directly connected to the i.MX6 processor. > And it is not a HW problem because as I said before, on Freescale > repository, it works... Try to compare the mmc clock tree in the FSL kernel versus 3.16: mount -t debugfs none /sys/kernel/debug/ cat /sys/kernel/debug/clk/clk_dump -- 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
