linux-kernel - Re: [PATCH 3/4] irqchip: Add documentation for the bcm2836 interrupt controller.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <55A4995C.4050701@wwwdotorg.org>
Date:	Mon, 13 Jul 2015 23:08:44 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Eric Anholt <eric@...olt.net>
CC:	linux-arm-kernel@...ts.infradead.org,
	linux-rpi-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Lee Jones <lee@...nel.org>, devicetree@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH 3/4] irqchip: Add documentation for the bcm2836 interrupt
 controller.

On 07/11/2015 12:01 AM, Eric Anholt wrote:
> Stephen Warren <swarren@...dotorg.org> 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.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/