From: Russell King <rmk@arm.linux.org.uk>
To: Thomas Koeller <thomas.koeller@baslerweb.com>
Cc: linux-serial@vger.kernel.org
Subject: Re: [PATCH] 8250 driver interrupt sharing
Date: Thu, 28 Oct 2004 12:00:26 +0100 [thread overview]
Message-ID: <20041028120026.B3327@flint.arm.linux.org.uk> (raw)
In-Reply-To: <200410281301.59584.thomas.koeller@baslerweb.com>; from thomas.koeller@baslerweb.com on Thu, Oct 28, 2004 at 01:01:58PM +0200
On Thu, Oct 28, 2004 at 01:01:58PM +0200, Thomas Koeller wrote:
> here is a little patch that causes the driver to no longer pretend having
> handled an interrupt if none of the ports actually interrupted. I am currently
> doing a port to a platform where I want (actually, have) to share a single
> interrupt between serial ports and other devices. The patch is against kernel
> version 2.6.9.
You can only share serial port interrupts with other devices if the
interrupt controller input is level sensitive rather than edge
sensitive. If it is edge sensitive, then you'll run into problems.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core
next prev parent reply other threads:[~2004-10-28 11:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-28 11:01 [PATCH] 8250 driver interrupt sharing Thomas Koeller
2004-10-28 11:00 ` Russell King [this message]
2004-10-28 11:17 ` Thomas Koeller
2004-10-28 11:18 ` Russell King
2004-11-01 12:10 ` Russell King
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