Irq domain for legacy interrupts

bharat kumar gogada bharatku at
Wed Oct 7 07:53:03 PDT 2015

why do we need a irq domain for legacy interrupts ? Do we need any specific
parameter in device tree other that interrupt-map, interrupt-map-mask, for
handling with irq domain ? when will the .map method in struct
irq_domain_ops get invoked for legacy interrupts ?

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