In reference design of the i.MX6 ULL one can see the signal called anatop.24M_OUT (Pad GPIO1_IO04, option ALT3). It looks like this signal can output a copy of the 24MHz clock generated by the i.MX from the quartz XTAL. This would be very useful, to use as clock for an external USB HUB for example.
However, I can't find any mention of anatop.24M_OUT in datasheet or reference manual. This signal can be used?