linux-kernel - Re: [PATCH 3/9] irq: convert generic-chip to use irq

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Message-ID: <4EE913C7.1060901@gmail.com>
Date:	Wed, 14 Dec 2011 15:23:19 -0600
From:	Rob Herring <robherring2@...il.com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree-discuss@...ts.ozlabs.org, shawn.guo@...escale.com,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kevin Hilman <khilman@...com>,
	Tony Lindgren <tony@...mide.com>,
	Barry Song <baohua.song@....com>,
	Linus Walleij <linus.ml.walleij@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 3/9] irq: convert generic-chip to use irq_domain



On 12/14/2011 03:14 PM, Grant Likely wrote:
> On Wed, Dec 14, 2011 at 8:28 AM, Rob Herring <robherring2@...il.com> wrote:
>> From: Rob Herring <rob.herring@...xeda.com>
>>
>> Add irq domain support to irq generic-chip. This enables users of
>> generic-chip to support dynamic irq assignment needed for DT interrupt
>> binding. Users must be converted to use irq_data.hwirq for determining
>> local interrupt numbers rather than using the Linux irq number.
>>
>> irq_base is kept for now as there are a few users of it. Once they
>> are converted to use the irq domain, it can be removed.
>>
>> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
>> Cc: Thomas Gleixner <tglx@...utronix.de>
>> ---
>>  include/linux/irq.h       |    2 +-
>>  kernel/irq/Kconfig        |    1 +
>>  kernel/irq/generic-chip.c |   57 ++++++++++++++++++++++++++++----------------
>>  3 files changed, 38 insertions(+), 22 deletions(-)
>>
>> diff --git a/include/linux/irq.h b/include/linux/irq.h
>> index bff29c5..9ba8a30 100644
>> --- a/include/linux/irq.h
>> +++ b/include/linux/irq.h
>> @@ -664,7 +664,7 @@ struct irq_chip_generic {
>>        raw_spinlock_t          lock;
>>        void __iomem            *reg_base;
>>        unsigned int            irq_base;
>> -       unsigned int            irq_cnt;
>> +       struct irq_domain       *domain;
> 
> Instead of making domain a pointer, why not embed the structure inside
> irq_chip_generic?  I don't see a reason for keeping it separate.
> 

There is a circular header dependency between irq.h and irq_domain.h.
Maybe I just need to put the include of irq_domain.h just above here
rather than the top of the file.

Rob

> After changing that you can add my Acked-by for this patch.
> 
> g.
> 
> 
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