linux-kernel - Re: [PATCH] watchdog: add support for w83697hg chip

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Message-ID: <20060911055053.GB18907@2ka.mipt.ru>
Date:	Mon, 11 Sep 2006 09:50:53 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Sergey Vlasov <vsu@...linux.ru>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Samuel Tardieu <sam@...1149.net>,
	Jim Cromie <jim.cromie@...il.com>,
	linux-kernel@...r.kernel.org, lm-sensors@...sensors.org
Subject: Re: [PATCH] watchdog: add support for w83697hg chip

Hello.

On Sat, Sep 09, 2006 at 10:02:56PM +0400, Sergey Vlasov (vsu@...linux.ru) wrote:
> I can find at least two attempts to fix the SuperIO problem:
> 
>   - a SuperIO subsystem proposed by Evgeniy Polyakov (cc'd);
> 
>   - a simple SuperIO locks coordinator proposed by Jim Cromie (also
>     cc'd; http://thread.gmane.org/gmane.linux.drivers.sensors/10052 -
>     can't find actual patches).
> 
> However, the mainline kernel still does not have anything for proper
> SuperIO access locking.

I created SuperIO subsystem for soekris board initially.
Later it was extended to support scx200/scx100 gpio (for w1 subsytem).
There is support for acb(i2c) bus, GPIO, and some stub for other
elements in pc8736x superIO chip.
But I was told those days (about at least 1.5 years ago) in lm_sensors 
mail list that splitting all that functionality into separated modules 
is the way to go.

As far as I recall pc8736x GPIO was added recently.

Here is one of the implementations posted to lm_sensors@:
http://archives.andrew.net.au/lm-sensors/msg27895.html

And here is my drawing board with image of how it looks (just for pure
interest) in my mind :) :
http://tservice.net.ru/~s0mbre/old/?section=gallery&item=superio_design

-- 
	Evgeniy Polyakov
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