Date: Fri, 14 Oct 2005 06:51:53 +0200 From: Milan Obuch <current@dino.sk> To: freebsd-current@freebsd.org Subject: Re: pcf module problem Message-ID: <200510140652.01440.current@dino.sk> In-Reply-To: <200510131551.46397.jhb@freebsd.org> References: <200510061321.35170.current@dino.sk> <200510131551.46397.jhb@freebsd.org>
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On Thursday 13 October 2005 21:51, John Baldwin wrote:
> On Thursday 06 October 2005 07:21 am, Milan Obuch wrote:
...
> > Then I checked pcf module and found the same behavior. If you have no
> > 'device iicbus' in kernel configuration, issuing 'kldload pcf' gives
> > link_elf: symbol iicbus_intr undefined
> > kldload: can't load pcf: No such file or directory.
> >
> > Adding 'device iibus' into kernel configuration and rebuilding kernel
> > fixes this, so it looks like symbol is just not exported.
> >
...
> >
> > Anyway, is anybody out there using pcf? There is some work done in this
> > area, but not yet linked into main tree. I have not pcf hardware, so I
> > can not test anything in this area, but it would be good to make the
> > transition from older i386/isa/pcf.c to new dev/pcf/...
>
> Sounds like it is missing a 'MODULE_DEPEND(iicbus, 1, 1, 1);' line. Can
> you try adding one and seeing if it fixes the kldload of pcf?
Bingo!
Actually, it is 'MODULE_DEPEND(pcf_isa, iicbus, 1, 1, 1);', at least with
6.0-RC1, after looking elsewhere I added 'MODULE_VERSION(pcf_isa, 1);' as
well. Those ones are not written literally at other places, but nevertheless,
this works.
Still, transition from 'sys/i386/isa/pcf.c' to '/sys/dev/pcf/*' solves this
isue as well, because there it is already fixed.
With Makefile changed to
.PATH: ${.CURDIR}/../../../../dev/pcf
KMOD = pcf
SRCS = device_if.h bus_if.h iicbus_if.h isa_if.h \
pcf.c pcf_isa.c
.include <bsd.kmod.mk>
it just works. I changed directly Makefile
in /sr/src/sys/modules/i2c/controllers/pcf, just for test, so maybe this is
not enough, however, it works.
So, the question remains - is anybody out there using pcf devices to confirm
this really works? For me it compiles and kldloads, but I have no real device
to test real functionality.
And the other question - is anybody out there using i2c devices at all? If so,
I would like to hear about their experiences. This area seems to be not
covered anywhere. Googling for 'freebsd i2c' and similar does not reveal
anything interesting for me...
Milan
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