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SBC8018 AM1808 - mmc not detected, root device unavailable

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Hi,

I'm new to embed, currently testing a card based on TI 1808. 

The card comes with a preinstalled distro, based on  Linux-2.6.33-rc4 but I would like to reinstall the card using the official TI kit (Linux EZ SDK for AM1808, AM1806, AM1802) that has kernel 2.6.37.

I'm building the new uImage with the recommended config (da850_omapl138_defconfig).

With the kernel of the offical dev kit MMC reader is not detected, so roofs can not be mounted.

When I put back the "default" uImage the card reader is detected and rootfs loaded.

mmc0: host does not support reading read-only switch. assuming write-enable.
mmc0: new high speed SDHC card at address e624
mmcblk0: mmc0:e624 SU08G 7.40 GiB
mmcblk0: p1

I checked the kernel configs to look for differences, in new kernel I have

CONFIG_MMC=y
CONFIG_MMC_DEBUG=y

CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_MINORS=8
CONFIG_MMC_BLOCK_BOUNCE=y

CONFIG_MMC_DAVINCI=y

I can't understand why SD reader is not detected at all, I'm missing something?

Thank you all for any hint you can give me. 

Alessiof




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