From: Mark Brown <broonie@kernel.org>
To: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Stephen Warren <swarren@wwwdotorg.org>,
Ian Campbell <ian.campbell@citrix.com>,
Felipe Balbi <balbi@ti.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
devicetree@kernel.org, Linux USB list <linux-usb@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Non-enumerable devices on USB and other enumerable buses
Date: Mon, 12 Aug 2013 15:41:10 +0100 [thread overview]
Message-ID: <20130812144110.GA6427@sirena.org.uk> (raw)
In-Reply-To: <CACxGe6sM8_d_omiQU=4qA207dnYMGDELN0KDbhYDsWDg7RKAKQ@mail.gmail.com>
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On Sun, Aug 11, 2013 at 11:08:37PM +0100, Grant Likely wrote:
> full enumerating like that with either ACPI or FDT, but we could allow
> for sparse population of devices when something is fixed like a
> soldered down USB hub or USB Ethernet MAC.
I agree, there's no point in listing things that can be done
automatically - it's just introducing potential for error.
> To make it work would probably require a hook in the USB enumeration
> path to look for matching nodes in DT/ACPI and attach it to the struct
> device.
Yes, that was where I was heading too. Have a mechanism for matching up
hotplugged devices with pre-registered ones which appear from firmware
or wherever if their IDs match. It'd need some mechanism for drivers to
opt into being bound to devices that aren't physically there I think so
that normal drivers for enumerated devices don't get confused.
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next prev parent reply other threads:[~2013-08-12 14:41 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-11 19:08 Non-enumerable devices on USB and other enumerable buses Mark Brown
2013-08-11 22:08 ` Grant Likely
2013-08-12 14:41 ` Mark Brown [this message]
2013-08-12 1:53 ` Alan Stern
2013-08-12 9:51 ` Mark Brown
2013-08-12 11:07 ` Mark Rutland
2013-08-12 11:32 ` Mark Brown
2013-08-12 18:08 ` Stephen Warren
2013-08-12 20:38 ` Mark Brown
2013-08-12 2:02 ` Greg Kroah-Hartman
2013-08-12 11:23 ` Mark Brown
2013-08-12 20:50 ` Greg Kroah-Hartman
2013-08-12 21:40 ` Mark Brown
2013-08-13 1:04 ` Alan Stern
2013-08-14 11:38 ` Mark Brown
2013-08-14 14:27 ` Alan Stern
2013-08-14 15:39 ` Mark Brown
2013-08-14 16:14 ` Alan Stern
2013-08-14 16:30 ` Stephen Warren
2013-08-14 18:49 ` Mark Brown
2013-08-14 17:30 ` Mark Brown
2013-08-14 18:35 ` Alan Stern
2013-08-14 18:46 ` Mark Brown
2013-08-14 19:39 ` Alan Stern
2013-08-14 20:16 ` Paul Zimmerman
2013-08-14 23:59 ` Mark Brown
2013-08-14 23:55 ` Mark Brown
2013-08-15 14:42 ` Alan Stern
2013-08-15 17:10 ` Mark Brown
2013-08-15 17:55 ` Alan Stern
2013-08-15 19:32 ` Mark Brown
2013-08-15 20:42 ` Alan Stern
2013-08-15 22:54 ` Mark Brown
2013-08-16 14:42 ` Alan Stern
2013-08-16 18:39 ` Mark Brown
2013-08-16 19:27 ` Alan Stern
2013-08-16 20:00 ` Mark Brown
2013-08-16 20:39 ` Alan Stern
2013-08-16 22:46 ` Mark Brown
2013-08-17 1:29 ` Alan Stern
2013-08-19 12:17 ` Ming Lei
2013-08-19 16:01 ` Mark Brown
2013-08-20 13:19 ` Ming Lei
2013-08-20 15:02 ` Mark Brown
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