On Wed, Sep 3, 2014 at 4:40 PM, Jean-Michel Hautbois <jhautbois@xxxxxxxxx> wrote: > 2014-09-03 10:39 GMT+02:00 Dong Aisheng <dongas86@xxxxxxxxx>: >> On Wed, Sep 3, 2014 at 4:25 PM, Jean-Michel Hautbois >> <jhautbois@xxxxxxxxx> wrote: >>> 2014-09-03 10:15 GMT+02:00 Dong Aisheng <dongas86@xxxxxxxxx>: >>>> Hi JM, >>> >>> Hi Dong, >>> >>>> On Tue, Sep 2, 2014 at 11:10 PM, Jean-Michel Hautbois >>>> <jhautbois@xxxxxxxxx> wrote: >>>>> 2014-09-02 11:20 GMT+02:00 Jean-Michel Hautbois >>>>> <jean-michel.hautbois@xxxxxxxxxxx>: >>>>>> Hi there, >>>>>> >>>>>> I start a new thread, as I have done lots of test and this will be clearer. >>>>>> I have problems reading and writing eMMC on my i.MX6 board with 3.17-rc3. >>>>>> Sometimes I don't have read errors explicitly in dmesg, but fdisk has >>>>>> no effects. >>>>>> I activated MMC debug in my config file, and here is an extract of >>>>>> mmc0 register dump and all mmc1 part. >>>>>> On Freescale kernel, I confirm it works well with the same board and >>>>>> sample, I can write a partition on mmc1. >>>>> >>>> >>>> My iMX6Q SabreSD board seems ok. >>>> What board did you use? >>>> What reading/writing problems did you meet? >>>> I did not see errors in your log. >>>> Can you paste the error log? >>> >>> This is a custom board. >>> You are right, activating debug seems to make the problem disappear... >>> I have CRC errors and my CMD signal is quite bad when this is happening. >>> I asked an HW engineer to look at this. >>> >>> I also double checked the pads, and added the >>> MX6QDL_PAD_NANDF_ALE__SD4_RESET pad, but the reset signal is always >>> down when doing this, when it should go down then up... >>> >> >> The sdhci-esdhc-imx driver does not implement hw_reset support via >> eMMC reset pin. > > OK, that is what I thought, let's add it then :) ? Yes, this feature needs to be added. Regards Dong Aisheng > JM -- 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
