linux-kernel - Re: [PATCH 2/2] watchdog: add support for MOXA V2100 watchdog driver

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Message-ID: <20110503143501.2596a9ce@lxorguk.ukuu.org.uk>
Date:	Tue, 3 May 2011 14:35:01 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Wolfram Sang <w.sang@...gutronix.de>, jimmy.chen@...a.com,
	linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
	wim@...ana.be
Subject: Re: [PATCH 2/2] watchdog: add support for MOXA V2100 watchdog
 driver

> Another thing that might be nice here is to have one module that probes
> the superio-port and then registers a platform device that other drivers

That doesn't help. See the it87 request_muxed patches pending. Because
the port can be muxed we need to actually implement port muxing across
the super I/O devices. That's a separate and larger problem altogether
and this device will get fixed as we do the other so not a problem.

> can can bind to. Right now, you have to load the module manually and
> then check if it's there, something we no longer do for most devices.

A lot of these super I/O devices have no entirely safe autodetect, and
the same is true for it87 and many others. There isn't a nice elegant
solution really.

Alan
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