I managed to get it going a little bit. I'm using the 2.6.25-rc7-ptxmxc7 kernel from
http://www.pengutronix.de...x-i.MX/index_en.html
and made some changes, see https://support.ultrawaves.com/imx27/imx27-uartfix.patch
The board hangs when reading PBC_VERSION_REG, which is on CS4, so I guess that's an external chip on the ADS board that's not there on the litekit.
I also keep the UART1 clock enabled (in PCCR1), and disable all baud rate programming.
My output is at https://support.ultrawaves.com/imx27/imx27-output.txt
Kernel config is at https://support.ultrawaves.com/imx27/imx27.config
Now I need to really figure out what's going on with those clocks...
Eric