Two different interrupt-parents

[Sethi Varun-B16395]

You can use a 4 cell interrupt specifier (we use that in case of embedded power architecture platforms)
- First cell corresponds to one of the four cascade lines (coming from the cascaded pic)
- Second cell provides the interrupt sense information
- Third one tells the interrupt subtype (in your case should be the cascade power interrupt type)
- Fourth cell communicates the interrupt number corresponding to the cascaded pic.

There would be a single interrupt parent, which is the system interrupt controller. You would have
to translate the four cell interrupt specifier and also add cascaded interrupt handling
for the shared interrupt line.

-Varun

> -----Original Message-----
> From: jonsmirl at gmail.com [mailto:jonsmirl at gmail.com]
> Sent: Monday, April 16, 2012 9:32 AM
> To: Sethi Varun-B16395
> Cc: devicetree-discuss
> Subject: Re: Two different interrupt-parents
> 
> On Sun, Apr 15, 2012 at 11:40 PM, Sethi Varun-B16395
> <B16395 at freescale.com> wrote:
> > Hi Jon,
> > Does the cascaded PIC have an interrupt line to the system interrupt
> controller?
> 
> There are four cascade lines. The 128 inputs on the cascade controller
> can be arbitrarily mapped onto these four lines.
> 
> >
> > Regards
> > Varun
> >
> >> -----Original Message-----
> >> From: devicetree-discuss-
> >> bounces+varun.sethi=freescale.com at lists.ozlabs.org
> >> bounces+[mailto:devicetree-
> >> discuss-bounces+varun.sethi=freescale.com at lists.ozlabs.org] On Behalf
> >> discuss-bounces+Of
> >> jonsmirl at gmail.com
> >> Sent: Sunday, April 15, 2012 8:27 AM
> >> To: devicetree-discuss
> >> Subject: Two different interrupt-parents
> >>
> >> How do you define a device with two different interrupt parents?
> >>
> >> I have a OTG USB controller where the main usb interrupt is on the
> >> system interrupt controller and the OTG power interrupts are on a
> cascaded PIC.
> >>
> >> --
> >> Jon Smirl
> >> jonsmirl at gmail.com
> >> _______________________________________________
> >> devicetree-discuss mailing list
> >> devicetree-discuss at lists.ozlabs.org
> >> https://lists.ozlabs.org/listinfo/devicetree-discuss
> >
> >
> 
> 
> 
> --
> Jon Smirl
> jonsmirl at gmail.com