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

To: rolf liu <rolfliu@gmail.com>
Subject: Re: can't find interrupt number under /proc/interrupts for the pci multi-port on db1550
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 28 Jun 2005 14:44:39 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <2db32b720506271706201a66fb@mail.gmail.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <2db32b720506271706201a66fb@mail.gmail.com>
Sender: linux-mips-bounce@linux-mips.org
On Maw, 2005-06-28 at 01:06, 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?

Do something like

        cat /dev/ttySwhatever

then look at the IRQ list. The interrupt will only be allocated while
the port is in use.


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