From: Arnd Bergmann <arnd@arndb.de>
To: "Li Yang-r58472" <LeoLi@freescale.com>
Cc: linuxppc-dev@ozlabs.org, Paul <paulus@samba.org>
Subject: Re: [PATCH 1/3] add USB setup code for 8349emds PB
Date: Wed, 7 Feb 2007 11:44:29 +0100 [thread overview]
Message-ID: <200702071144.29548.arnd@arndb.de> (raw)
In-Reply-To: <989B956029373F45A0B8AF02970818900D4339@zch01exm26.fsl.freescale.net>
On Wednesday 07 February 2007 11:10, Li Yang-r58472 wrote:
> How about a non-PCI ehci driver for all architectures (such as arm, m68k)?
> Then, platform_bus is a more generic interface than of_platform.
Yes, that's right. The main difference is that if you scan all of devices
at boot time, you already have a node for the USB controller and you
shouldn't need to create another node that does not reflect the actual
hierarchy in the linux device tree.
A platform_device is really meant to be 'something that can't be probed
but we know it is there', like the interrupt controller on a PC.
With the of device tree, we can probe anything, so ideally, we should
not need to create any platform devices at all.
Arnd <><
next prev parent reply other threads:[~2007-02-07 10:44 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-06 9:05 [PATCH 1/3] add USB setup code for 8349emds PB Li Yang
2007-02-06 13:17 ` Arnd Bergmann
2007-02-07 2:22 ` Li Yang-r58472
2007-02-07 8:47 ` Arnd Bergmann
2007-02-07 9:16 ` Li Yang-r58472
2007-02-07 10:02 ` Arnd Bergmann
2007-02-07 10:10 ` Li Yang-r58472
2007-02-07 10:44 ` Arnd Bergmann [this message]
2007-02-07 16:10 ` Kumar Gala
2007-02-06 14:37 ` Kumar Gala
2007-02-06 16:31 ` Kumar Gala
2007-02-07 2:27 ` Li Yang-r58472
2007-02-07 4:09 ` Kumar Gala
2007-02-07 5:16 ` Li Yang-r58472
-- strict thread matches above, loose matches on Subject: below --
2007-02-07 5:47 Li Yang
2007-02-08 6:46 ` Kumar Gala
2007-02-05 9:09 Li Yang
2007-02-05 15:04 ` Kumar Gala
2007-02-06 3:15 ` Li Yang-r58472
2007-02-06 3:30 ` Kumar Gala
2007-02-06 3:46 ` Li Yang-r58472
2007-02-06 4:01 ` Kumar Gala
2007-02-06 4:52 ` Li Yang-r58472
2007-02-06 5:00 ` Li Yang-r58472
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