From: Jan Kiszka <jan.kiszka@domain.hid>
To: Marcelo Coelho <mjcoelho@domain.hid>
Cc: Xenomai help <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] which way to obtain irq#
Date: Mon, 16 Oct 2006 20:32:17 +0200 [thread overview]
Message-ID: <4533D031.4040306@domain.hid> (raw)
In-Reply-To: <4533C841.3040108@domain.hid>
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Marcelo Coelho wrote:
> Hi!
>
>
> 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).
>
> 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 )
>
>
> 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).
>
>
> From your experience, is there any problem using the virtual irq number
> (the 1st option)?
>
>
>
> Thanks for your answers!!
>
>
Jan
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next prev parent reply other threads:[~2006-10-16 18:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-16 17:58 [Xenomai-help] which way to obtain irq# Marcelo Coelho
2006-10-16 18:32 ` Jan Kiszka [this message]
2006-10-17 9:28 ` Marcelo Coelho
2006-10-17 9:39 ` Marcelo Coelho
2006-10-17 16:46 ` Gilles Chanteperdrix
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