From: Pierre Ossman <drzeus-list@drzeus.cx>
To: Adam Belay <ambx1@neo.rr.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: PNP and bus association
Date: Sat, 29 Jan 2005 01:43:36 +0100 [thread overview]
Message-ID: <41FADC38.4090108@drzeus.cx> (raw)
In-Reply-To: <20050128224752.GA2545@neo.rr.com>
Adam Belay wrote:
>Hi Pierre,
>
>The platform bus does not show the actual physical relationship either. For
>x86, ACPI is typically needed to determine this. It would be easy to bind to
>spawn pnp devices off of an ISA bridge device, attached to the pci bus, but
>whether it's the actual physical parent would be very difficult to determine
>without firmware assistance.
>
>At the moment the pnp bus is only showing a logical bus relationship. If we
>were to use ACPI to aid in the generation of the physical device tree, we
>could put these devices in the correct physical location.
>
>
So it is correct behaviour that the device shows up under /sys/bus/pnp
when found using PNP, and /sys/bus/platform when scanned for?
I'm trying to get it to work well with HAL and it would be nice if it
could be found in a consistent way.
Rgds
Pierre
prev parent reply other threads:[~2005-01-29 0:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-27 21:16 PNP and bus association Pierre Ossman
2005-01-27 22:56 ` Randy.Dunlap
2005-01-28 15:49 ` Pierre Ossman
2005-01-28 22:47 ` Adam Belay
2005-01-29 0:43 ` Pierre Ossman [this message]
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