Re: How to create IRQ mappings in a GPIO driver that doesn't controlits IRQ domain ?

From: Mark Brown
Date: Thu Jul 25 2013 - 09:16:33 EST

On Thu, Jul 25, 2013 at 11:45:33AM +0200, Laurent Pinchart wrote:

> The two devices are independent, so there's no real parent/child relationship.
> However, as Grant proposed, I could list all the interrupts associated with
> GPIOs in the GPIO controller DT node. I would then just call
> irq_of_parse_and_map() in the .to_irq() handler to magically translate the
> GPIO number to a mapped IRQ number.

> 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?

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