[PATCH 1/3] add USB setup code for 8349emds PB

[Li Yang-r58472]

> -----Original Message-----
> From: Arnd Bergmann [mailto:arnd at arndb.de]
> Sent: Wednesday, February 07, 2007 6:02 PM
> To: linuxppc-dev at ozlabs.org
> Cc: Li Yang-r58472; Paul
> Subject: Re: [PATCH 1/3] add USB setup code for 8349emds PB
> 
> On Wednesday 07 February 2007 10:16, Li Yang-r58472 wrote:
> > Do you mean to create an of_plarform_driver here just to do the platform
> > initialization?  The true USB driver can only takes platform_device as
> > it is used by multiple architectures.
> > btw: We don't access the mmio address of the device here.  We just need
> > to read some property from the device tree.
> 
> The usb host controllers already come with an abstraction layer, e.g. there
> is ehci-fsl.c, ehci-au1xxx.c and some more. All powerpc bases systems that
> have the host controller on a local bus instead of PCI should use a common
> driver for that, I believe one has already been posted some time ago,
> but I'm not entirely sure about that.
> 
> As mentioned by Kumar Gala, we should eventually migrate over the users
> of ehci-fsl to a new ehci-of, but getting rid of ehci-fsl means removing
> all its users in arch/ppc first.

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.

- Leo