Subject: [PATCH 3/4] irqchip: Add documentation for the bcm2836 interrupt controller.

From: [email-masked] (Stephen Warren)
Date: Mon, 13 Jul 2015 23:08:44 -0600

On 07/11/2015 12:01 AM, Eric Anholt wrote:
> Stephen Warren <[email-masked]> writes:
> 
>> On 07/07/2015 03:13 PM, Eric Anholt wrote:
>>> This is a new per-cpu root interrupt controller on the
>>> Raspberry Pi 2, which will chain to the bcm2835 interrupt
>>> controller for peripheral interrupts.
>> 
>>> diff --git
>>> a/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2836-l1-intc.txt
>>> b/Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2836-l1-intc.txt
>>
>>>
>>> 
+local_intc: local_intc {
>> 
>>> +	interrupt-parent = <&local_intc>;
>> 
>> I think that property shouldn't be there?
> 
> If you don't have it there, the core finds the interrupt-parent in
> the parent node, and waits for that one before initializing (which
> is in turn waiting for us).  Note that for original 2835, you're
> finding the parent node as well.

Ah yes. It does indeed look like it's typical that the root IRQ
controller points at itself.