[U-Boot] Trouble with mmc 1 on exynos snow chromebook

[bruce m beach]

Hello

 I have a samsung "snow" chromebook. Building u-boot from

git clone git://git.denx.de/u-boot.git

and changing #define CONFIG_SYS_TEXT_BASE 0x43E00000 to
             #define CONFIG_SYS_TEXT_BASE 0x42400000

in include/configs/exynos5250-common.h I get a chained u-boot
that boots. (if I don't make that change I just get a blank screen)
The problem that I'm have is that dev mmc 1 (mmcblk1) doesn't seem to
work. dev mmc 0 (mmcblk0) does work as far as I have tested it.
Below are some of the messages that I get. (btw there are no
mmc init or mmcinit commands)

snow> mmc rescan
      dwmci_send_cmd: data ERROR!
snow> mmc dev 1
      dwmci_send_cmd: Timeout
snow> mmc list
      EXYNOS DWMMC 0 (eMMC)
      EXYNOS DWMMC 1
snow> ext2load mmc 1:2 ${loadaddr} env.txt
      dwmci_send_cmd: Timeout
      ** bad device mmc 1 **

The ext2load command I regularly use on mmc1 using a precompiled version
of u-boot works fine so mmc 1 (and the filesystem) is okay

Thanks

  Bruce