From: Scott Wood <scottwood@freescale.com>
To: Eno 3 Compton <one@ecom.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: irq identification has changed from 2.6.10 to 2.6.23. an explanation is requested
Date: Wed, 10 Oct 2007 15:47:32 -0500 [thread overview]
Message-ID: <470D3A64.2000507@freescale.com> (raw)
In-Reply-To: <f6c0dc290710101339t30a15881t3ffbe02324006b28@mail.gmail.com>
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
tree.
-Scott
prev parent reply other threads:[~2007-10-10 20:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-10 20:39 irq identification has changed from 2.6.10 to 2.6.23. an explanation is requested Eno 3 Compton
2007-10-10 20:47 ` Scott Wood [this message]
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