Subject: [RFC PATCH 1/3] dt: irq: add interrupt controller descriptor struct

From: [email-masked] (Rob Herring)
Date: Wed, 10 Aug 2011 08:23:03 -0500

On 08/10/2011 08:14 AM, Jamie Iles wrote:
> On Tue, Aug 09, 2011 at 03:16:58PM -0500, Rob Herring wrote:
>> From: Rob Herring <[email-masked]>
>>
>> In preparation to scan and initialize interrupt controllers from a
>> device-tree, create struct to pass to interrupt controller initialization
>> functions.
>>
>> irq_base should go away with dynamic linux irq assignment.
>>
>> Signed-off-by: Rob Herring <[email-masked]>
>> ---
>>  include/linux/of_irq.h |    6 ++++++
>>  1 files changed, 6 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
>> index cd2e61c..de91ff9 100644
>> --- a/include/linux/of_irq.h
>> +++ b/include/linux/of_irq.h
>> @@ -33,6 +33,12 @@ struct of_irq {
>>  	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
>>  };
>>  
>> +struct of_intc_desc {
>> +	struct device_node *controller;
>> +	struct device_node *parent;
> 
> Do we need parent here?  I think that of_irq_find_parent() will do the 
> job.
> 

With interrupt controller scanning code, it will avoid calling
of_irq_find_parent twice. That code will have to maintain a list of
nodes and parents anyway in order to initialize controllers with no
parent first.

Rob

> Other than that nit the series looks nice to me.
> 
> Jamie