> When booting kernel with initcall_debug we never see that
> gpmi_nand_probe() function is never getting called.

You probably don't have a NAND device registered. Then, there is nothing to
bind a driver to.

> I have gone through the MTD  mailinglist log, and I didn't find
> details on how this GPMI-NAND driver was actually tested on hardware.

It should be there somewhere, the mach relevant patches have been mentioned
there, too.

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |