From: Arnd Bergmann <arnd@arndb.de>
To: "Zhang Wei-r63237" <Wei.Zhang@freescale.com>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: Porting RapidIO from ppc arch to powerpc arch in support ofMPC8641D
Date: Thu, 24 May 2007 11:19:23 +0200 [thread overview]
Message-ID: <200705241119.23793.arnd@arndb.de> (raw)
In-Reply-To: <46B96294322F7D458F9648B60E15112C307037@zch01exm26.fsl.freescale.net>
On Thursday 24 May 2007, Zhang Wei-r63237 wrote:
> Of_platform_driver is a good framework. But this RapidIO driver is not a
> device driver. It's a _bus_ driver very similar to PCI bus. So,
> of_platform_driver is not fit here.
But there is not a fundamental difference between the two. In the Linux
driver model, a bus driver is a simply device driver whose devices have
other devices as child nodes.
Your example of PCI buses fits well here. Traditionally, each platform
had its own PCI scanning code that went looking for pci host bridges.
Now we have the of_pci_phb_driver in arch/powerpc/kernel/of_platform.c
that automatically sets up the bridges, and the platform only
needs to provide a ppc_md.pci_setup_phb() callback.
Arnd <><
next prev parent reply other threads:[~2007-05-24 9:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-22 19:38 Porting RapidIO from ppc arch to powerpc arch in support of MPC8641D Phil Terry
2007-05-22 20:08 ` Segher Boessenkool
2007-05-22 20:09 ` Timur Tabi
2007-05-22 23:05 ` Arnd Bergmann
2007-05-24 6:48 ` Porting RapidIO from ppc arch to powerpc arch in support ofMPC8641D Zhang Wei-r63237
2007-05-24 9:19 ` Arnd Bergmann [this message]
2007-05-24 9:44 ` Zhang Wei-r63237
2007-05-24 11:27 ` Arnd Bergmann
2007-05-23 13:26 ` Porting RapidIO from ppc arch to powerpc arch in support of MPC8641D Zhang Wei-r63237
2007-05-23 13:32 ` Mark A. Greer
2007-05-23 14:03 ` Zhang Wei-r63237
2007-05-23 15:42 ` Phil Terry
2007-05-23 15:53 ` Mark A. Greer
2007-05-23 15:54 ` Phil Terry
2007-05-23 14:21 ` Kumar Gala
2007-05-23 15:37 ` Phil Terry
2007-05-23 16:05 ` Segher Boessenkool
2007-05-23 16:20 ` Phil Terry
2007-05-23 16:20 ` Kumar Gala
2007-05-23 16:43 ` Phil Terry
2007-05-23 23:17 ` Segher Boessenkool
2007-05-23 23:05 ` Segher Boessenkool
2007-05-24 7:31 ` Porting RapidIO from ppc arch to powerpc arch in support ofMPC8641D Zhang Wei-r63237
2007-05-23 16:00 ` Porting RapidIO from ppc arch to powerpc arch in support of MPC8641D Segher Boessenkool
2007-05-23 16:13 ` Phil Terry
2007-05-24 0:52 ` David Gibson
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