Thomas Dorris

Problems with MMC on linux-2.6-imx git

Discussion created by Thomas Dorris on May 30, 2012
Latest reply on Jun 5, 2012 by Thomas Dorris

I've been using the linux-2.6-imx kernel source that was included on CD with my IMX23 EVK for several weeks now.  I've found various issues and fixed various little things here and there, but it's all pretty much worked for me.  So I decided to get brave and grab the latest git release and build that instead.


git clone


I copied my .config from old (original CD kernel build area) to the new git directory and pointed the ltib build over to the new directory as well. Everything built find but I can't boot this new kernel image (at least not off my SD card) because it hangs here:


Waiting for root device /dev/mmcblk0p2...


I'm really baffled. I don't know where to begin to debug this. I know nobody is going to be able to tell me exactly what to do to fix it, but maybe just some tips on places to look and things to check.


Here's the diff between my old and new .config files (> indicates lines in new).


> # CONFIG_FSL_OTP is not set
> # CONFIG_REGULATOR_MAX17135 is not set


And here's a diff between the boot up console of my old kernel vs. my new kernel (> indicates lines in new).


< Battery Voltage = 4.20V
> Battery Voltage = 4.19V
< Linux version 2.6.31-626-g602af1c (twdorris@debianbox) (gcc version 4.1.2) #41 Wed May 30 08:46:04 EDT 2012
> Linux version 2.6.31-00932-g0bc57f1 (twdorris@debianbox) (gcc version 4.1.2) #3 Wed May 30 08:40:20 EDT 2012
< Memory: 125924KB available (3420K code, 227K data, 100K init, 0K highmem)
> Memory: 125920KB available (3420K code, 228K data, 100K init, 0K highmem)
< Calibrating delay loop... 231.83 BogoMIPS (lpj=1159168)
> Calibrating delay loop... 226.91 BogoMIPS (lpj=1134592)
< NETol family 16
> NET: Registered protocol family 16
< tREA : Unknown
< tRLOH : Unknown
< tRHOH : Unknown
> tREA : 20 ns
> tRLOH : 5 ns
> tRHOH : 15 ns
< usb usb1: Manufacturer: Linux 2.6.31-626-g602af1c ehci_hcd
> usb usb1: Manufacturer: Linux 2.6.31-00932-g0bc57f1 ehci_hcd
< mxs-rtc mxs-rtc.0: setting system clock to 1970-01-01 00:00:39 UTC (39)
< mmc0: new SD card at address aaaa
< mmcblk0: mmc0:aaaa SU02G 1.84 GiB
< mmcblk0:
< p1 p2
> mxs-rtc mxs-rtc.0: setting system clock to 1970-01-01 00:02:52 UTC
> Waiting for root device /dev/mmcblk0p2...


Any ideas?