linux-kernel - Re: [PATCH] irqchip: add support for Marvell Orion SoCs

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Date:	Thu, 2 May 2013 19:56:23 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnd Bergmann <arnd@...db.de>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Jean-Francois Moine <moinejf@...e.fr>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] irqchip: add support for Marvell Orion SoCs

On Thu, May 02, 2013 at 08:54:20PM +0200, Sebastian Hesselbarth wrote:
> On 05/02/13 20:45, Russell King - ARM Linux wrote:
>> On Thu, May 02, 2013 at 08:33:48PM +0200, Sebastian Hesselbarth wrote:
>>> On 05/02/2013 08:25 PM, Sebastian Hesselbarth wrote:
>>>> This patch adds an irqchip driver for the main interrupt controller found
>>>> on Marvell Orion SoCs (Kirkwood, Dove, Orion5x, Discovery Innovation).
>>>> Corresponding device tree documentation is also added.
>>>>
>>>> Signed-off-by: Sebastian Hesselbarth<sebastian.hesselbarth@...il.com>
>>>> ---
>>>> Note: This patch triggers a checkpatch warning for
>>>>     WARNING: Avoid CamelCase:<handle_IRQ>
>>>>
>>> [...]
>>>> diff --git a/include/linux/irqchip/orion.h b/include/linux/irqchip/orion.h
>>>> new file mode 100644
>>>> index 0000000..04f7bab
>>>> --- /dev/null
>>>> +++ b/include/linux/irqchip/orion.h
>>>> @@ -0,0 +1,18 @@
>>>> +/*
>>>> + * Marvell Orion SoCs IRQ chip driver header.
>>>> + *
>>>> + * Sebastian Hesselbarth<sebastian.hesselbarth@...il.com>
>>>> + *
>>>> + * This file is licensed under the terms of the GNU General Public
>>>> + * License version 2.  This program is licensed "as is" without any
>>>> + * warranty of any kind, whether express or implied.
>>>> + */
>>>> +
>>>> +#ifndef __LINUX_IRQCHIP_ORION_H
>>>> +#define __LINUX_IRQCHIP_ORION_H
>>>> +
>>>> +#include<asm/exception.h>
>>>
>>> First review by myself. The above include is a left-over and
>>> will be removed in a v2.
>>
>> You still need your first level IRQ handlers marked with __exception_irq_entry
>> which is defined in the above file.
>>
>
> Russell,
>
> I know and it is marked with __exception_irq_entry. The above is in
> include/linux/irqchip/orion.h and only used for .init_irq in machine
> descriptor later.
>
> The irq handler is never exposed to the board file itself, but set
> within orion_init_irq. This approach has been taked by
> irqchip/irq-gic.c and irqchip/irq-vic.c rather than adding
> .handle_irq to the machine descriptor.

But I don't find an asm/exception.h include in drivers/irqchip/whateveryour.cfileiscalled
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