From: Alan <alan@lxorguk.ukuu.org.uk>
To: Stefan Roese <ml@stefan-roese.de>
Cc: linux-kernel@vger.kernel.org, linuxppc-embedded@ozlabs.org
Subject: Re: [PATCH] serial: Use real irq on UART0 (IRQ = 0) on PPC4xx systems
Date: Mon, 20 Nov 2006 11:42:48 +0000 [thread overview]
Message-ID: <20061120114248.60bb0869@localhost.localdomain> (raw)
In-Reply-To: <200611201200.36780.ml@stefan-roese.de>
On Mon, 20 Nov 2006 12:00:36 +0100
Stefan Roese <ml@stefan-roese.de> wrote:
> This patch fixes a problem seen on multiple 4xx platforms, where
> the UART0 interrupt number is 0. The macro "is_real_interrupt" lead
> on those systems to not use an real interrupt but the timer based
> implementation.
NAK.
Zero means "no interrupt" in the Linux space. If you have a physical IRQ
0 remap it to a convenient number (eg map IRQ's + 1, or stick it on the
end). The logical and physical IRQ numbering in Linux don't have to match
up - and given some platforms have IRQ numbering per bus and the like
clearly doesn't in many cases.
next prev parent reply other threads:[~2006-11-20 11:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-20 11:00 [PATCH] serial: Use real irq on UART0 (IRQ = 0) on PPC4xx systems Stefan Roese
2006-11-20 11:24 ` Peter Korsgaard
2006-11-20 11:42 ` Alan [this message]
2006-11-20 11:54 ` Stefan Roese
2006-11-20 12:10 ` Alan
2006-11-20 13:04 ` Russell King
2006-11-20 21:21 ` Guennadi Liakhovetski
2006-11-20 13:28 ` Sergei Shtylyov
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