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From: Hans Petter Selasky <hselasky@c2i.net>
To: Mykhaylo Yehorov <yehorov@gmail.com>
Date: Sat, 14 Jan 2012 11:45:05 +0100
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Cc: freebsd-gnats-submit@freebsd.org, freebsd-usb@freebsd.org
Subject: Re: usb/164090: [umodem] [patch] Add sysctl with ucom unit number
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On Saturday 14 January 2012 10:51:07 Mykhaylo Yehorov wrote:
> On Fri, Jan 13, 2012 at 22:54, Hans Petter Selasky <hselasky@c2i.net> wrote:
> > Hi,
> > 
> > Could you patch ucom_set_pnpinfo_usb() instead, so that such a sysctl is
> > created for all ucom devices, not only umodem?
> 
> I guess it will be necessary to remove a sysctl oid from a parent
> sysctl tree before destroying ucom structures.
> It's would be better to do in ucom_detach() but now there is no a
> pointer to a parent device structure from there.
> 
> Now all drivers that use ucom pass a pointer to parent softc structure
> to ucom_attach().
> Is there any reason for this?
> May be it's would be more useful to pass a pointer to a parent device
> structure.
> 
> > Can you explain a bit more how you use this information in your scripts?
> 
> I've got a gps receiver and a mobile phone that supported by the umodem
> driver. I can attach its in any order.
> So I use sysctl to generate gpsd and ppp configs with appropriate
> values of serial port.

Ok, I see.

And you cannot use the information passed through devd by 
ucom_set_pnpinfo_usb()?

--HPS