Re: No sharing IRQ broken board problem

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Wed, 2 Nov 2005 tcrix@att.net wrote:

> I have a pci board in development that works but..
> it can not share the interrupt line.
>

It's on the PCI bus. It needs to be an "open collector" type.
Sharing or not is really not a software issue! The only
kind of hardware problem that could cause "shared interrupt"
line problems is the designer fails to provide the correct
kind of interface driver. In that case, just "dead-bug" a
FET (or two) on the board, near the connector, to convert
the driven bit to an open-collector (drain) bit.

> Has someone hacked through the problem of reserving one of the inta, intb,
> .. 's for a single device?  I would love to see how you did so I could
> continue on with my driver while I wait for the !@$#!@ hardware guys to fix
> the board.
>
> Thanks for the help,
> Tom Rix
> -

Cheers,
Dick Johnson
Penguin : Linux version 2.6.13.4 on an i686 machine (5589.55 BogoMips).
Warning : 98.36% of all statistics are fiction.
.

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