From: Matthew Garrett <mjg@redhat.com>
To: Lan Tianyu <tianyu.lan@intel.com>
Cc: linux-acpi@vger.kernel.org, linux-usb@vger.kernel.org,
lenb@kernel.org, gregkh@linuxfoundation.org
Subject: Re: [PATCH V2 3/4] usb: Bind devices to ACPI devices when possible
Date: Wed, 14 Mar 2012 12:48:11 +0000 [thread overview]
Message-ID: <20120314124811.GB5155@srcf.ucam.org> (raw)
In-Reply-To: <4F5FF26C.5040004@intel.com>
On Wed, Mar 14, 2012 at 09:20:44AM +0800, Lan Tianyu wrote:
> On 2012年03月13日 05:45, Matthew Garrett wrote:
> >Built-in USB devices will typically have a representation in the system
> >ACPI tables. Add support for binding the two together so the USB code can
> >make use of the associated methods.
> hi Matthew:
> acpi glue framework only can cover situation that the port has been
> connected with some device. so without device, no acpi handle can be used to
> access "UPC" and "PLD".
> Whether the usb port is user-visible or not is also useful when there
> is no device. For example, if it is known that the usb port is not user-visible
> and connectable. The usb hub port can be power-off.
> So usb/acpi binding should consider those usb ports without plugging device.
> Does this make sense? :)
I agree that this woud be useful, but right now we don't have port
objects so there's nowhere to expose this. Greg, do you have any
feelings about how this coud be handled?
--
Matthew Garrett | mjg59@srcf.ucam.org
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next prev parent reply other threads:[~2012-03-14 12:48 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-12 21:45 [PATCH V2 1/4] ACPI: Fix up _PLD methods Matthew Garrett
2012-03-12 21:45 ` [PATCH V2 2/4] ACPI: Add _PLD support Matthew Garrett
[not found] ` <1331588747-1247-1-git-send-email-mjg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-03-12 21:45 ` [PATCH V2 3/4] usb: Bind devices to ACPI devices when possible Matthew Garrett
[not found] ` <1331588747-1247-3-git-send-email-mjg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2012-03-14 1:20 ` Lan Tianyu
2012-03-14 12:48 ` Matthew Garrett [this message]
2012-03-14 14:29 ` Greg KH
2012-03-14 14:44 ` Alan Stern
2012-03-12 21:45 ` [PATCH V2 4/4] usb: Set device removable state based on ACPI USB data Matthew Garrett
2012-03-13 21:32 ` [PATCH V2 1/4] ACPI: Fix up _PLD methods Greg KH
2012-03-13 21:38 ` Matthew Garrett
2012-03-13 21:49 ` Greg KH
[not found] ` <20120313214941.GA4534-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org>
2012-04-10 7:56 ` Lan, Tianyu
[not found] ` <4CFBC02C07DA244CA19D6815A05BE6EE05C77B-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2012-04-10 13:01 ` Moore, Robert
2012-03-13 11:07 ` Sergei Shtylyov
[not found] ` <4F5F2A64.8030403-Igf4POYTYCDQT0dZR+AlfA@public.gmane.org>
2012-03-13 11:38 ` Matthew Garrett
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