Hi, In my case, -84 error is related with timing. I recommend to check your clock source or pin strength. Best Regards, Jaehoon Chung On 08/06/2014 03:54 PM, Jean-Michel Hautbois wrote: > 2014-08-06 3:15 GMT+02:00 Hsin-Hsiang Tseng <hsinhsiangtseng@xxxxxxxxx>: >> from your log, maybe you should check the driver use byte mode or >> sector mode to access eMMC. >> Because the capacity of eMMC which you used is less or equal to 2GB. > > How can I know that ? > FYI : > $> cat /sys/kernel/debug/mmc1/ios > clock: 52000000 Hz > actual clock: 49500000 Hz > vdd: 21 (3.3 ~ 3.4 V) > bus mode: 2 (push-pull) > chip select: 0 (don't care) > power mode: 2 (on) > bus width: 3 (8 bits) > timing spec: 8 (mmc DDR52) > signal voltage: 0 (3.30 V) > -- > 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 > -- 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
