On Wed, Feb 11, 2009 at 03:43:26PM +0530, Vijay Nikam wrote: > Ok ... so that means if I am writing driver for any device I need to > take care of this mapping ? ? ? I mean I should use virq ? ? ? > > I read in LDD book,
The problem with dead-tree books on a volatile subject is they quickly get out of date. > they give directly irq no. they have given parallel port example, here > they have set or said irq no. defaults to 7 and they have not done any > irq_mapping so what is the difference ? ? ? I mean how I should know > when to use irq_mapping and when not ? ? ? That's for legacy ISA interrupts. On powerpc, you generally will want to get the interrupt from the device tree using irq_of_parse_and_map(). -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
