Saved FAQ from Freescale.com for information only:
Topic: USB
Question. Does the USB OTG PHY support charger detect?
Answer. On the i.MX51, the charger detector will detect a charger that is compatible with the USB battery charging spec rev 1.0 hence it will detect a charger that has Dp/Dm shorted.
Related Products:
i.MX Applications Processors > i.MX51 Processors > i.MX512, i.MX513, i.MX514, i.MX515, i.MX516
depends on what PMIC on your chip