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Re: can't find interrupt number under /proc/interrupts for the pci multi

To: Jon Anders Haugum <>
Subject: Re: can't find interrupt number under /proc/interrupts for the pci multi-port on db1550
From: rolf liu <>
Date: Tue, 28 Jun 2005 08:09:23 -0700
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Reply-to: rolf liu <>
What is the real reason to disable the existing uart on db1550? I
checked the PCI configuration for the multi-port board. It seems the
configuration is ok, including the memory map, irq number. The linux
can find such information and register this device, but it just can't
work :(

On 6/28/05, Jon Anders Haugum <> wrote:
> On Mon, 27 Jun 2005, rolf liu wrote:
> > I am running 2.4.31 on db1550 with a pci multi-port board. the kernel
> > starts up ok. but after start-up, I can't find the corresponding
> > interrupt number for this board, which is irq 2. I can find the device
> > under /proc/devices and /proc/tty/driver, etc. So I am now sure if it
> > is working ok. Is there good (simple) method to test this serial port?
> My guess is that you can get it working if you disable the built-in serial
> ports in the kernel.
> I've attached a quick'n'dirty patch I made for 2.4.27 that makes it
> possible to use both internal and pci serial ports. It's a hack, but it
> works.
> --
> Jon Anders Haugum

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