Good news is that manually specifying the pins "works":
```
> reset; halt
JTAG tap: imx28.cpu tap/device found: 0x079264f3 (mfg: 0x279 (SigmaTel), part: 0x7926, ver: 0x0)
WARNING: unknown debug reason: 0xf
ThumbEE -- incomplete support
target halted in ThumbEE state due to debug-request, current mode: Supervisor
cpsr: 0x079264f3 pc: 0x079264ed
MMU: disabled, D-Cache: disabled, I-Cache: disabled
NOTE! Severe performance degradation without fast memory access enabled. Type 'help fast'.
target halted in Thumb state due to debug-request, current mode: Supervisor
cpsr: 0x000000f3 pc: 0xfffe3892
MMU: disabled, D-Cache: disabled, I-Cache: disabled
```