linux-kernel - Re: [PATCH v2] Re: Battery class driver.

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Date:	Sat, 28 Oct 2006 13:15:54 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Shem Multinymous <multinymous@...il.com>
Cc:	Richard Hughes <hughsient@...il.com>,
	Dan Williams <dcbw@...hat.com>, linux-kernel@...r.kernel.org,
	devel@...top.org, sfr@...b.auug.org.au, len.brown@...el.com,
	greg@...ah.com, benh@...nel.crashing.org,
	David Zeuthen <davidz@...hat.com>,
	linux-thinkpad mailing list <linux-thinkpad@...ux-thinkpad.org>
Subject: Re: [PATCH v2] Re: Battery class driver.

On Thu, 2006-10-26 at 01:39 +0200, Shem Multinymous wrote:
> > They're simple enough to add. We can do it when the tp driver gets
> > converted over.
> 
> Sure. But It will require some thought. For example, the interface
> will need to encompass the non-symmetric pair of force commands on
> ThinkPads:
> "discharge the battery until further notice" vs.
> "don't charge the battery for N minutes".
> 
> Also, ThinkPads express  the start/stop charging thresholds in
> percent, whereas I imagine some other hardware will represent it as
> capacity.

Hm. Again we have the question of whether to export 'threshold_pct' vs.
'threshold_abs', or whether to have a separate string property which
says what the 'unit' of the threshold is. I don't care much -- I'll do
whatever DavidZ prefers.

The git tree now has support for battery information available from the
PMU on Apple laptops. I _really_ don't like the way I have to register a
fake platform_device just to be able to get sensible attribute
callbacks. I suspect it should go back to being a class_device and we
should fix the class_device attribute functions. Greg?

-- 
dwmw2

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