linux-kernel - Re: [RFC PATCH 01/15] dt/powerpc: move of_bus

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Date:	Mon, 28 Feb 2011 00:35:29 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	devicetree-discuss@...ts.ozlabs.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	sfr@...b.auug.org.au, linux-kernel@...r.kernel.org,
	davem@...emloft.net, sparclinux@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [RFC PATCH 01/15] dt/powerpc: move of_bus_type infrastructure
 to ibmebus

On Thu, Feb 24, 2011 at 03:46:48PM +0100, Arnd Bergmann wrote:
> On Wednesday 23 February 2011, Grant Likely wrote:
> > arch/powerpc/kernel/ibmebus.c is the only remaining user of the
> > of_bus_type support code for initializing the bus and registering
> > drivers.  All others have either been switched to the vanilla platform
> > bus or already have their own infrastructure.
> > 
> > This patch moves the functionality that ibmebus is using out of
> > drivers/of/{platform,device}.c and into ibmebus.c where it is actually
> > used.  Also renames the moved symbols from of_platform_* to
> > ibmebus_bus_* to reflect the actual usage.
> > 
> > This patch is part of moving all of the of_platform_bus_type users
> > over to the platform_bus_type.
> > 
> > Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
> 
> The ibmebus is essentially the platform bus of the IBM Power Systems (a.k.a.
> pSeries a.k.a. System p), I think it would make a lot of sense to convert
> the two drivers (ehca and ehea) on this bus into platform drivers as well.
> 
> The original reason for this bus was to provide a different IOMMU for them
> than what is used on the PCI devices. This should now be possible in simpler
> ways.

Agreed.  Anybody want to volunteer to craft a patch?

In the mean time, do you have any problem with this patch?  (assuming
nobody is able to take on the task of converting those drivers
immediately).

g.

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