RE: Two different interrupt-parents

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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org [mailto:jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org]
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
[off-list ref] wrote:

quoted

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.

quoted

Regards
Varun

quoted

-----Original Message-----
From: devicetree-discuss-
bounces+varun.sethi=freescale.com-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
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jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
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.

quoted

quoted

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Jon Smirl
jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
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Jon Smirl
jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org