From: Laurent Pinchart <laurentp@cse-semaphore.com>
To: linuxppc-dev@ozlabs.org
Subject: Interrupt handling documentation
Date: Tue, 11 Mar 2008 11:58:45 +0100 [thread overview]
Message-ID: <200803111158.48540.laurentp@cse-semaphore.com> (raw)
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Hi everybody,
is there any documentation describing interrupt handling for the powerpc
architecture ? I'm writing a driver for a cascaded interrupt controller and
the only source of information I found was the code.
I'm particularly interested in information about irq hosts (allocation and
initialisation, especially the map and unmap callbacks) and irq chaining.
Different drivers seem to implement cascaded irqs differently (for instance
arch/powerpc/sysdev/uic.c uses setup_irq to register the cascaded irq
handler, while arch/powerpc/platforms/82xx/pq2ads-pci-pic.c uses
set_irq_chained_handler) so I'm a bit lost here.
Best regards,
--
Laurent Pinchart
CSE Semaphore Belgium
Chaussée de Bruxelles, 732A
B-1410 Waterloo
Belgium
T +32 (2) 387 42 59
F +32 (2) 387 42 75
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next reply other threads:[~2008-03-11 10:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-11 10:58 Laurent Pinchart [this message]
2008-03-12 0:51 ` Interrupt handling documentation Michael Ellerman
2008-03-13 13:56 ` Laurent Pinchart
2008-03-17 16:13 ` Laurent Pinchart
2008-03-17 20:44 ` Benjamin Herrenschmidt
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