Re: [PATCH 1/4] thinkpad_acpi: Add support for controlling chargethresholds
From: Henrique de Moraes Holschuh
Date: Mon Dec 30 2013 - 16:58:52 EST
On Mon, 30 Dec 2013, Julian Andres Klode wrote:
> On Mon, Nov 11, 2013 at 02:56:30PM +0100, Julian Andres Klode wrote:
> > Add support for battery charge thresholds in new Sandy Bridge and Ivy Bridge
> > ThinkPads. Based on the unofficial documentation in tpacpi-bat.
> > The threshold files support the values '0' for the controller's default,
> > and 1-99 as percentages. Values outside of that range are rejected. The
> > behaviour of '0' might be confusing, especially for the stop case where
> > it basically seems to mean '100'.
> Thinking more about this, it might make more sense to simply accept a 100
> value and not accept a 0 value in the stop case (I tried multiple times to
> write 100 to a stop_charge_thresh file, because that feels more natural).
> Having a 0 mean 100% is just odd. So stop_charge_thresh should simply
> accepts integer values in the range [1, 100] (and start_charge_thresh
> should continue accept [0, 99], as 0 really means 0 there).
Indeed. Just return EINVAL for a stop threshold of 0.
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