In setting up a build environment here:

does the first compile enable the clock?

It seems the clock is enabled (in omap2_mcspi.c) for an ADS7846 touchscreen (declared in board-overo.c).
However, I don't see the clock with a logic analyzer connected on pin 171 of a PALO43 board.

If the answer is no and the first compile doesn't produce the SPI clock, what should I do to produce the SPI clock?

Ion A. Beza.