linux-kernel - Re: What pokes the ISA IO port of 0x211 ?

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Message-ID: <480CF3A5.8080104@keyaccess.nl>
Date:	Mon, 21 Apr 2008 22:05:57 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Frantisek Rysanek <Frantisek.Rysanek@...t.cz>
CC:	linux-kernel@...r.kernel.org
Subject: Re: What pokes the ISA IO port of 0x211 ?

On 21-04-08 13:12, Frantisek Rysanek wrote:
> Dear Everyone,
> 
> I'm dealing with an embedded PC motherboard that contains some custom 
> circuitry (GPIO), accessible via an ISA IO range between 0x200 and 
> 0x218.  
> 
> There's an interesting issue with this in recent Linux (tried 
> 2.6.22.6 and 2.6.24.2): something probes IO port 0x211 on boot, which 
> happens to be an add-on buzzer control port - effectively the kernel 
> boot launches an accoustic alarm :-)  
> 
> Any ideas what this could be? 

ISAPnP default read data port is close at 0x213...

I haven't checked but this also reminds me of sensor chips. Do you have 
sensor drivers builtin?

Rene.
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