Re: [PATCH V3] irqchip: Add TB10x interrupt controller driver

From: Grant Likely
Date: Mon Jun 03 2013 - 05:51:33 EST

On Mon, Jun 3, 2013 at 5:05 AM, Vineet Gupta <Vineet.Gupta1@xxxxxxxxxxxx> wrote:
> On 06/01/2013 03:48 AM, Grant Likely wrote:
>> If I were working on this system I'd drop the
>> snps,arc700-intc node entirely and have a single abilis,tb10x-intc that
>> encapsulated the properties of both (you would of course want to share
>> handler functions for the 'normal' inputs without the custom features).
>> That would eliminate the goofyness of listing 27 separate interrupts in
>> the abilis,tb10x-ictl interrupts property.
> But how is this different from other systems with a primary in-core intc and a
> cascaded external intc. How do they do it. I guess I need to read up more on this.

Usually cascaded irq controllers have multiple irqs multiplexed onto a
single irq on the parent controller. It's the 1:1 situation that makes
this controller odd.

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