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ZedBoard Hardware Design /dev/mmcblk0 does not exist
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/dev/mmcblk0 does not exist

metinburak_
metinburak_ over 11 years ago

Hi,

I am using Analog Devices kernel and ADV7511 xcomm HDL for Zedboard.

I use an SD card with 2 partitions, first for RFS and 2nd for the boot part.

I see dmesg messages well about the SDCARD mount and  at startup and boot well into Linaro distro.
The dmesg message is :

mmc0: new high speed SDHC card at address 0007
mmcblk0: mmc0:0007 SD8GB 7.42 GiB
mmcblk0: p1 p2

But, when i write

root@linaro-ubuntu-desktop:/dev# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       3,5G  2,7G  589M  83% /
none            101M  156K  101M   1% /run
none            5,0M     0  5,0M   0% /run/lock
none            504M     0  504M   0% /run/shm


and there is no mmcblk0 device in the /dev folder.
I see it on
root@linaro-ubuntu-desktop:/sys/block# ls
loop0  loop2  loop4  loop6  mmcblk0  ram1   ram11  ram13  ram15  ram3  ram5  ram7  ram9
loop1  loop3  loop5  loop7  ram0     ram10  ram12  ram14  ram2   ram4  ram6  ram8

but no device under /dev folder.
Any ideas?

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  • metinburak_
    0 metinburak_ over 11 years ago

    1st solution:

    CONFIG_DEVTMPFS=y                                                               
    CONFIG_DEVTMPFS_MOUNT=y

    in kernel config

    2nd solution (manually after boot)
    mknod /dev/mmcblk0 b 179 0
    mknod /dev/mmcblk0p1 b 179 1
    mknod /dev/mmcblk0p2 b 179 2

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