From: David Miller <davem@xxxxxxxxxxxxx> Date: Thu, 17 Feb 2011 13:05:03 -0800 (PST) > From: Sam Ravnborg <sam@xxxxxxxxxxxx> > Date: Thu, 17 Feb 2011 21:57:48 +0100 > >> I'm trying to understand how we deal with floppy irq on sparc64. >> >> In arch/sparc/include/asm/floppy_64.h we have: >> >> error = request_irq(FLOPPY_IRQ, sparc_floppy_irq, >> IRQF_DISABLED, "floppy", NULL); >> >> FLOPPY_IRQ is set equal op->archdata.irqs[0] in sun_floppy_init(). >> So FLOPPY_IRQ is the platform irq - and not a virtual irq. > > The archdata IRQ is actually the computed virtual IRQ. > > This is the same as how we fetch the IRQ to use in other "OF" platform > drivers. > > Look at drivers/net/sunhme.c's OF platform driver probing, it uses > of->archdata.irqs[0] as the IRQ. BTW, if you're looking for where this is computed, look in arch/sparc/kernel/of_device_64.c:scan_one_device() and build_one_device_irq(). -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
