Date: Mon, 29 Dec 2008 22:20:20 +0100 From: Andre Albsmeier <Andre.Albsmeier@siemens.com> To: freebsd-arch@freebsd.org Subject: Two drivers, one physical device: How to deal with that? Message-ID: <20081229212020.GA1809@curry.mchp.siemens.de>
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Hello, I have written a driver which attaches to the host bridge in order to periodically read the appropriate registers and inform the user about ECC errors (ECC-Monitor). No I have run across a mainboard where the host bridge is already taken by the agp driver. Of course, I can detach the agp driver and attach myself and everything is working but what is if someone does not want to loose the agp functionality? How does one deal with the case when two separate drivers have to access the same device (the host bridge in my case)? I assume, the correct way would be to join the AGP and ECC functionality in one driver but maybe there are other tricks I am not aware of? Thanks, -Andre
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