[PATCH 1/2] n2100: support assigning XINT1 to UART

[Mikael Pettersson]

Russell King - ARM Linux writes:
 > On Mon, Sep 28, 2009 at 11:58:13AM +0200, Lennert Buytenhek wrote:
 > > Can't you detect whether the 8250 IRQ is routed at boot?  E.g. cause
 > > the UART to throw an interrupt, check the XINT, clear the interrupt,
 > > and check the XINT again, and see if the 8250 interrupt status
 > > corresponds to the XINT or not?  (And then printk the result of the
 > > detection.)
 > 
 > 8250 already has support for auto-probing its interrupt.

The question is how well things work if the 2nd uhci and
serial share (software) interrupt. I'll have to check.