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Forum Post: Device node for mmc1 not coming with custom board based on ti8148.

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Hello All,

We have a custom board based on DM8148, and used eMMC 'MTFC4GMVEA' from micron ( permanently mounted)

It's connected on mmc1 pins on the same lines as SD-card connected on ti8148 evm, with card-detect pin and write protect pin pulled-up high.

It seems, u-boot is able to communicate with this eMMC memory, as u-boot command gives correct info,

#mmcinfo 0

Manufacturer ID: fe

OEM: 14e

Name: MMC04

Tran Speed: 25000000

Rd Block Len: 512

MMC version 4.0

High Capacity: Yes

Capacity: 2199023255552

Bus Width: 4-bit

which is correct, beside the capacity, which i have already figured out in the u-boot code why!

But after starting our customized kernel-2.6.37 ( with modified config based on our board, but all options same in driver-> mmc), we don't see the device node in dev as /dev/mmcblk0. Just an info, we are nfs mounting the root file system provided with the ezsdk, with few files removed from /etc/init.d (like load-hd-firmware, pvr-init, etc)..but udev is there!

I have already checked the mux settings using 'devmem2' utility, they seem OK.

Can somebody point out, what could be wrong and further direction i can look into?

br

Vikas

 


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