linux-kernel - Re: How to create IRQ mappings in a GPIO driver that doesn't control its IRQ domain ?

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Date:	Thu, 25 Jul 2013 15:21:35 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	Grant Likely <grant.likely@...aro.org>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: How to create IRQ mappings in a GPIO driver that doesn't control
 its IRQ domain ?

On Thu, Jul 25, 2013 at 3:15 PM, Mark Brown <broonie@...nel.org> wrote:
> On Thu, Jul 25, 2013 at 11:45:33AM +0200, Laurent Pinchart wrote:
>
>> The number of interrupts can be pretty high (up to 58 in the worst case so
>> far), so an alternative would be to specify the interrupt-parent only, and
>> call irq_create_of_mapping() directly. What solution would you prefer ?
>
> Are the interrupts in a contiguous block in the controller so you can
> just pass around the controller and a base number?

That works with platform data and in-kernel structures, but AFAICT
device tree has no such "bulk" concept but expects you to list
each and every line individually in cases like this.

Yours,
Linus Walleij
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