On Mon, 13 Jul 2015, Suravee Suthikulpanit wrote:

Currently, when calling irq_domain_alloc_irqs() on ARM64, it uses
struct of_phandle_args to pass irq information. However, this is not
appropriate for ACPI since of_phandle_args is specific to DT.

Therefore, this patch introduces a new function pointer,
irq_domain_ops.init_alloc_info, which can be used by irqchips to provide
a way to initialize irqchip-specific data-structure for allocating IRQ.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
NOTE:
Similarly, x86 is currently using struct irq_alloc_info
(see arch/x86/include/asm/hw_irq.h) and each irq_domain has different
way of initializing this structure.

And why don't you use the same mechanism on ARM and have a private
irq_alloc_info implementation which can carry either DT or ACPI
information?
 
Thanks,

	tglx