Re: New consolidate irqs vs . probe_irq_*()

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Wed, Oct 20, 2004 at 09:53:33PM +1000, Paul Mackerras wrote:
> Russell King writes:
> 
> > Remember that PCMCIA effectively has its own IRQ router which requires
> > the PCMCIA code to know which IRQs are physically connected and which
> > aren't.  Unfortunately, there's no way to get that information as far
> > as I know except by the published method in the code.
> 
> On my powerbook, the pcmcia/cardbus controller has one interrupt,
> which is used both for card status changes and for card functional
> interrupts.  It doesn't have an ISA bus and it doesn't have an 8259
> interrupt controller, and interrupts 0-15 aren't anything like what
> they might be on a PC.  This is why (as Ben says) there is no point
> probing for interrupts, and why on ppc (or at least on powermacs) the
> probe functions are no-ops.

Correct - and Ben's comments seem to imply that yenta is wrong for doing
so.  I'm making the point that it isn't.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 PCMCIA      - http://pcmcia.arm.linux.org.uk/
                 2.6 Serial core