From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rajendra Nayak <rnayak@ti.com>
Subject: Re: [PATCH 1/3] misc: Add crossbar driver
Date: Fri, 23 Aug 2013 11:47:02 +0530
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To: Sricharan R <r.sricharan@ti.com>
Cc: Nishanth Menon <nm@ti.com>, Russell King - ARM Linux <linux@arm.linux.org.uk>, "linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>, Tony Lindgren <tony@atomide.com>, Linus Walleij <linus.walleij@linaro.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Felipe Balbi <balbi@ti.com>, Grant Likely <grant.likely@secretlab.ca>, Santosh Shilimkar <santosh.shilimkar@ti.com>, Thomas Gleixner <tglx@linutronix.de>, Linux-OMAP <linux-omap@vger.kernel.org>, "devicetree-discuss@lists.ozlabs.org" <devicetree-discuss@lists.ozlabs.org>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>
List-Id: devicetree@vger.kernel.org

On Friday 23 August 2013 11:41 AM, Sricharan R wrote:
> Hi,
> On Friday 23 August 2013 10:17 AM, Rajendra Nayak wrote:
>> On Thursday 22 August 2013 05:03 PM, Sricharan R wrote:
>>>  maps crossbar number<->  to interrupt number and
>>>  calls request_irq(int_no, crossbar_handler,..)
>> So will this mapping happen based on some data passed from DT or
>> just based on whats available when the device does a request_irq()?
>>
>> If its based on whats available then I see an issue when you need
>> to remap something thats already mapped by default (and not used)
>> since you run out of all free ones.
> Yes, when done based on what is available then there is a
> problem when we run out of free ones because we do not
> know which one to replace. I was thinking of something like
> this,
>     1) DT would give a list of all free ones, and also if some are
>         mapped as default and not used, mark those also as free.
> 
>      2) While mapping see if it has a default mapping and use it.
>           otherwise, pick from free list.   
> 
>   This should be ok right ?

yeah, sounds ok.

> 
> Regards,
>  Sricharan
>