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Date: Mon, 16 Oct 2006 20:32:17 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] which way to obtain irq#
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To: Marcelo Coelho <mjcoelho@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>

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Marcelo Coelho wrote:
> Hi!
>=20
>=20
> I'm developing a driver based on RTDM, and i'm having some problems
> related to IRQ discovery (related to the fact that the driver is
> starting to do something).
>=20
> So, there is 2 ways to obtain the IRQ number:
>     pci_device -> irq
> or
>     pci_read_config_byte( pci_device, PCI_INTERRUPT_LINE, (unsigned
> char*) &irq )
>=20
>=20
> The difference between these is that the 1st presents the "real" irq
> number (between 1 and 15) and the other presents the "virtual" irq
> (between 1 and 255).

[I think you swapped the terms "real" and "virtual" here, no?]

You have to use the first one like any Linux driver (RTDM is no
different in this regard).

>=20
>=20
> From your experience, is there any problem using the virtual irq number=

> (the 1st option)?
>=20
>=20
>=20
> Thanks for your answers!!
>=20
>=20

Jan


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