From: "Paul Rolland" <rol@as2917.net>
To: "'Russell King'" <rmk@arm.linux.org.uk>
Cc: "'Ruud Linders'" <rkmp@xs4all.nl>, <linux-kernel@vger.kernel.org>
Subject: Re: Serial port numbering (ttyS..) wrong for 2.5.61+
Date: Mon, 2 Jun 2003 20:43:24 +0200 [thread overview]
Message-ID: <011501c32936$d8fc44d0$3f00a8c0@witbe> (raw)
In-Reply-To: <20030602185118.B776@flint.arm.linux.org.uk>
Hello,
> When we add a port to the system, we try to find in order:
>
> - a port which matches the base address
> - a port which is unallocated
>
> Probably the easiest way to stop the "ttyS14" occuring would
> be to clear the port information at boot when we don't find a port.
>
>From 8250_pci.c, you have :
/*
* Probe one serial board. Unfortunately, there is no rhyme nor reason
* to the arrangement of serial ports on a PCI card.
*/
It seems that your board is reporting the parameters in such an order
that when looking for a port based on the IRQ, I/O port, ... the matching
one has id 14...
You could see this more clearly by setting SERIAL_DEBUG_PCI
at line 1549 to activate the code :
#ifdef SERIAL_DEBUG_PCI
printk("Setup PCI port: port %x, irq %d, type %d\n",
serial_req.port, serial_req.irq, serial_req.io_type);
#endif
that would report to you the order in which ports are found on
your system.
Regards,
Paul
next prev parent reply other threads:[~2003-06-02 18:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-01 11:14 Serial port numbering (ttyS..) wrong for 2.5.61+ Ruud Linders
2003-06-01 12:48 ` Paul Rolland
2003-06-02 17:51 ` Russell King
2003-06-02 18:43 ` Paul Rolland [this message]
2003-06-03 16:58 ` Ruud Linders
-- strict thread matches above, loose matches on Subject: below --
2003-06-02 16:21 Ruud Linders
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