Re: [PATCH] IRQ and resource for platform_device

[Matt Porter <mporter@kernel.crashing.org>]

On Thu, May 15, 2003 at 05:30:52PM +0100, Russell King wrote:
> On Thu, May 15, 2003 at 09:03:50AM -0700, Matt Porter wrote:
> > On Thu, May 15, 2003 at 02:59:20PM +0100, Russell King wrote:
> > > The location and interrupt of some platform devices are only known by
> > > platform specific code.  In order to avoid putting platform specific
> > > parameters into drivers, place resource and irq members into struct
> > > platform_device.
> > > 
> > > Discussion point: is one resource and one irq enough?
> > 
> > No.
> > 
> > We have the same need for PPC SoC and system controller on-chip
> > devices.  Some devices have multiple interrupts and/or resources.
> 
> Is there a sane limit on the number of interrupts and resources for one
> device?

As of today, I know of a device that has 5 interrupts and another
with 2 interrupts.  I believe two resources is the most I've seen
so far on a "dumb" on-chip device.

I think having an array of irqs and resources of max count 8 should
do it for now.

No matter what we choose, the hardware designers will screw it up
eventually.

Regards,
-- 
Matt Porter
mporter@kernel.crashing.org