--------
In message <52374125.ogxafgl...@ralph.baldwin.cx>, John Baldwin writes:

>Create the corresponding device_t but device_disable() it when there
>is a disabled property.

That also removes a couple of boilerplate lines from all FDT device
drivers.

>A user can then use 'devctl enable <blah>' to enable
>it before (or even after) loading a device driver.

That would work for me.

I wonder if it would be too noisy if we allowed ->probe() to run
on disabled devices and reported something like:

        "foobar0: Matched disabled device <...>"

(without calling ->attach())

That way you would know you loaded the right driver, rather
than have to guess.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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