irq identification has changed from 2.6.10 to 2.6.23. an explanation is requested
scottwood at freescale.com
Thu Oct 11 06:47:32 EST 2007
Eno 3 Compton wrote:
> I had a driver working under 2.6.10 on a mpc8248. The kernel got changed
> under me to 2.6.23. Now, when I call request_irq with SIU_INT_IRQ5,
> which is defined in asm-powerpc/irq.h, and once compiled and worked
> properly, I get compilation errors. The compiler can't find the symbol
> definition because CONFIG_PPC_MERGE is defined. I suspect the kernel
> guys have migrated things to a new arrangement, which I've been unable
> to discern.
> An explanation or advice on where to find information about this would
> be hugely appreciated.
Ideally, you should put whatever device you're trying to drive in the
device tree, and use of_irq_to_resource() on the device node to find the
virtual IRQ number.
Failing that, you can call irq_find_mapping(), but you'll need to either
pass in the device node of the relevant interrupt controller, or call
irq_set_default_host() -- but really, it's better to just use the device
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