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. Regards Dong Aisheng > Thanks, > 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
