Date: Sun, 5 Sep 2004 19:09:37 -0700
From: "Randy.Dunlap" <rddunlap@osdl.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: jonsmirl@gmail.com, linux-kernel@vger.kernel.org, perex@suse.cz
Subject: Re: Intel ICH - sound/pci/intel8x0.c
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On Sun, 05 Sep 2004 21:49:50 +0100 Alan Cox wrote:

| On Sul, 2004-09-05 at 22:24, Jon Smirl wrote:
| > I'd don't know enough about the LPC bridge chip to know what the
| > correct answer is for this. Right now I tend to think that the PCI
| > driver should own the bridge chip. If not the PCI driver then there
| > should be an explicit bridge driver. I don' think it is correct that a
| > joystick driver is attaching to a bridge chip given the simple fact
| 
| Nobody else currently needs to attach to it so why make life needlessly
| complicated.

What I/O addresses are we talking about here?
There is someone working on a SD/MMC (blah blah) memory card interface
that is on LPC, using what used to be reserved as timer IO ports
(0x40 - 0x5f), and he's splitting timer ports up into 2 ranges:
0x40 - 0x43 and 0x50 - 0x53, so that the LPC ports are available.

| > that all legacy IO - joystick, PS/2, parallel, serial, etc is located
| > off from that same bridge chip.
| > 
| > Matthieu's comments about using PNP for this seem to make sense. Are
| > we missing implementation of an ACPI feature for controlling these
| > ports?
| 
| See previous discussion. We have isapnp, biospnp but not great acpi pnp.
| None of them help because you need to deal with hotplug.

--
~Randy
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