From: Grant Likely <glikely@gmail.com>
To: Yasushi SHOJI <yashi@atmark-techno.com>
Cc: linuxppc-embedded <linuxppc-embedded@ozlabs.org>
Subject: Re: ppc_sys.c with platform device model or create opb bus?
Date: Sat, 23 Jul 2005 13:03:45 -0400 [thread overview]
Message-ID: <528646bc05072310039fb536d@mail.gmail.com> (raw)
In-Reply-To: <87hdeuosmq.wl@mail2.atmark-techno.com>
On 7/17/05, Yasushi SHOJI <yashi@atmark-techno.com> wrote:
> I feel that the ppc_sys_spec is for SoC, which doesn't dynamically
> change the peripherals it has. otoh, fpga based platform can have
> arbitrary number of devices if you configured so.
>=20
> I usually implement a device with PLB or OPB. for those bus, should I
> use platform device model or create new buses for each?
ppc_sys is just a convenient wrapper around the platform device model.
You can safely ignore ppc_sys if your board setup code calls
platform_device_register() for all of your devices directly.
Besides, as ppc moves to the flattened device tree for initializing
the platform bus, the whole ppc_sys stuff will be going away and the
device tree parsing code will call platform_device_* directly.
Cheers,
g.
next prev parent reply other threads:[~2005-07-23 17:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-17 6:26 ppc_sys.c with platform device model or create opb bus? Yasushi SHOJI
2005-07-23 14:48 ` Matt Porter
2005-07-23 17:03 ` Grant Likely [this message]
2005-07-23 18:34 ` Need SEC 1.0 Descriptor programmer's guide Vikas Aggarwal
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