linux-kernel - Re: [RFCv2 03/14] irq_domain: Make irq_domain structure match powerpc's irq

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Date:	Tue, 24 Jan 2012 15:08:40 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Rob Herring <robherring2@...il.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	devicetree-discuss@...ts.ozlabs.org,
	Milton Miller <miltonm@....com>, benh@...nel.crashing.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFCv2 03/14] irq_domain: Make irq_domain structure match
 powerpc's irq_host

On Tue, Jan 24, 2012 at 2:38 PM, Rob Herring <robherring2@...il.com> wrote:
> On 01/23/2012 03:07 PM, Grant Likely wrote:
>> Part of the series to unify the irq remapping mechanisms in the
>> kernel.  A follow up patch will copy the powerpc implementation into
>> kernel/irq/irqdomain.c, which will be a lot easier if the structures
>> are identical.
>>
>> Where they differ, I've chose to use the powerpc names since there is
>> a lot more code using those names.
>>
>> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
>> ---
>>  arch/arm/common/gic.c     |   14 ++++----
>>  include/linux/irqdomain.h |   84 ++++++++++++++++++++++++++++++++++-----------
>>  kernel/irq/irqdomain.c    |   14 ++++----
>>  3 files changed, 78 insertions(+), 34 deletions(-)
>>
>
> snip...
>
>> @@ -126,7 +126,7 @@ void irq_dispose_mapping(unsigned int irq)
>>  }
>>  EXPORT_SYMBOL_GPL(irq_dispose_mapping);
>>
>> -int irq_domain_simple_dt_translate(struct irq_domain *d,
>> +int irq_domain_simple_xlate(struct irq_domain *d,
>>                           struct device_node *controller,
>>                           const u32 *intspec, unsigned int intsize,
>>                           unsigned long *out_hwirq, unsigned int *out_type)
>
> This needs a declaration in irqdomain.h (as well as EXPORT?). There
> could be others as well, but this is the one I'm using for generic irq chip.

Fine by me.  I'll add that as a follow-on patch since nothing in-tree
currently depends on that.  It will be in the next version of the
patch series.  Also, are you okay if I rename it to
irq_domain_generic_xlate()?  Simple doesn't really describe it well,
and it can be used for any interrupt controller implementing the
binding we've settled on as recommended for new device support.

g.

>
> Rob
>
>> @@ -181,7 +181,7 @@ EXPORT_SYMBOL_GPL(irq_domain_generate_simple);
>>
>>  struct irq_domain_ops irq_domain_simple_ops = {
>>  #ifdef CONFIG_OF_IRQ
>> -     .dt_translate = irq_domain_simple_dt_translate,
>> +     .xlate = irq_domain_simple_xlate,
>>  #endif /* CONFIG_OF_IRQ */
>>  };
>>  EXPORT_SYMBOL_GPL(irq_domain_simple_ops);
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
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