Date: Fri, 06 Feb 2009 14:35:44 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: freebsd-hackers@FreeBSD.org Subject: Super I/O driver Message-ID: <498C2EA0.6080604@icyb.net.ua>
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Do we have any drivers for special functions provided by ISA/LPC Super I/Os. I mean many of them have watchdog capabilities, GPIO, etc. I do not meant fdc, lpt, sio/uart and hwm which are 9or can be) handled as the devices of their own. I have some quite hairy code for Winbond W83977EF that provides watchdog and led interfaces (the latter is for power led). I'd like to understand what is the best/canonical way to access superio's ports, enter configuration mode, etc. Also, it would be interesting to see how various configurations/wirings of the same superio could be handled. I looked at some Linux drivers but their coding ways are quite different and they typically handle only one wiring type (probably the one that was found on author's motherboard). I also would be interested in a general discussion on this topic (superios). BTW, do we have some interface to userland or GPIO? Something similar to led(4), but more generic (and supporting 'I' as well 'O'). -- Andriy Gapon
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