[PATCH v3 03/11] clocksource: sp804: add device tree support

[Pawel Moll]

On Wed, 2013-03-13 at 15:25 +0000, Haojian Zhuang wrote:
> On 13 March 2013 23:23, Pawel Moll <pawel.moll at arm.com> wrote:
> > On Wed, 2013-03-13 at 14:17 +0000, Rob Herring wrote:
> >> How about:
> >>
> >> 1 irq - TIMINT1
> >> 2 irqs w/ same source # - TIMINTC
> >> 2 irqs w/ different source # - TIMINT1 and TIMINT2
> >
> > On Wed, 2013-03-13 at 15:11 +0000, Haojian Zhuang wrote:
> >> What's the scenario that we must use TIMINTC? TIMINT1 & TIMINT2 are
> >> already enough on these two TIMERs. If we really needn't TIMINTC, we
> >> need to support it. Since it's over-designed.
> >>
> >> If TIMINT1 & TIMINT2 aren't routed, and only TIMINTC is routed. It's another
> >> case. We can consider it as replacement of TIMINT1.
> >
> > Just a thought... How to describe a SP804 with only TIMINT2 wired up?
> >
> > Paweł
> >
> >
> There's no difference on TIMINTC is only used to replace TIMINT1 or TIMINT2.
> We only need to tell sp804 driver which timer is using irq, and the irq number.

If I understand you well:

* Both TIMINT1 and TIMINT2 wired up - TIMINTC doesn't matter

	interrupts = <1>, <2>;

* TIMINT1 wired up, TIMINT2 not wired up

	interrupts = <1>;

* Only TIMINTC wired up - treat it as TIMINT1

	interrupts = <1>;

So far so good. My question is, how do you describe the following:

* _Only_ TIMINT2 wired up, TIMINT1 and TIMINTC _not_ wired up

	interrupts = ???

Paweł