linux-kernel - Re: [PATCH v3 1/4] hwmon: (lm90) split set&show temp as common codes

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Date:	Fri, 12 Jul 2013 16:30:34 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Wei Ni <wni@...dia.com>, thierry.reding@...il.com,
	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
	linux-tegra@...r.kernel.org
Subject: Re: [PATCH v3 1/4] hwmon: (lm90) split set&show temp as common
 codes

Hi Guenter,

On Fri, 12 Jul 2013 06:50:00 -0700, Guenter Roeck wrote:
> On Fri, Jul 12, 2013 at 03:26:15PM +0200, Jean Delvare wrote:
> > One thing I am a little worried about (but maybe I'm wrong) is that I
> > seem to understand you want to register every LM90-like chip as both a
> > hwmon device and two thermal devices. I seem to recall that every
> > thermal device is also exposed automatically as a virtual hwmon
> > device, is that correct? If so we will be presenting the same values
> > twice to libsensors, which would be confusing.
> 
> Not sure if that is a good idea, but if I recall correctly, the thermal folks
> plan to remove that path.

If that means that for example the ACPI thermal zone is no longer
displayed by "sensors", then I strongly object - unless it is
explicitly registered as a separate hwmon device from now on, of course.

My idea was to make the bridge optional - you decide when you register
a thermal device if it should be exposed as hwmon or not.

I don't have a strong opinion on the implementation, as long as each
input is listed by "sensors" once and only once.

-- 
Jean Delvare
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