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From: Marcel Moolenaar <marcelm@juniper.net>
To: "M. Warner Losh" <imp@bsdimp.com>
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Date: Fri, 28 Dec 2007 12:27:06 -0800
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Cc: embedded@freebsd.org
Subject: Re: ocpbus(4)
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On Dec 28, 2007, at 11:50 AM, M. Warner Losh wrote:

> : Existing drivers that only check DEVTYPE (which I'm sure
> : we'll start with) will have to check DEVCLASS as well if
> : there's going to be variation within DEVTYPE.
>
> Are there existing drivers right now?

The e500 port uses ocpbus(4) and if we make it generic,
I can merge it into CVS independently of the e500 code
itself.

> FreeBSD has two models for device enumeration.  One is where the
> parent bus decides, by whatever means, and one where the device itself
> has enough information to allow the driver to decide.  I think that
> trying to shoe-horn the second model into a situation where the first
> model is actually better would be a disservice.

When would the first be better?

-- 
Marcel Moolenaar
marcelm@juniper.net