Re: [ibm-acpi-devel] [RFC] Controlling the ThinkPad battery charger

[Pavel Machek]

On Mon 2011-05-09 12:29:41, Henrique de Moraes Holschuh wrote:
> On Mon, 09 May 2011, Andrew Lutomirski wrote:
> > > The SBS interface exposes more data about the battery, including
> > > per-cell-group voltage and pack microcontroller aging counters, alarms, and
> > > the "needs to get through the fuel-gaugue reset procedure" semasphore.
> > 
> > If I'm feeling really motivated, I'll look at that.  I'm currently
> > more interested in the charging thresholds, though, which I think is
> > independent of the choice of SBS vs ACPI to access the battery state.
> > (From a quick glance at the SBS spec, you can inhibit charging
> > entirely but you can't ask for thresholds.  I assume that the EC takes
> > care of that.  If I'm wrong, please tell me, but SMAPI seems like a
> > fine way to access the thresholds.)
> 
> Yeah, SMAPI is the safest way to deal with all this.  It is an interface
> layer that Lenovo is not fond of breaking (or touches very rarely.  Amounts
> to the same in the end).
> 
> SBS does not take care of thresholds, indeed.  The EC does (and I know how
> to program the threshold in a few models, if you do want to test it in your
> X220, I can send you the information.  It is safe to test if you use it
> together with SMAPI to cross-check).

Hmm, I jave a battery pack with reasonably good cells, but firmware killed it. IOW available for testing.

(And who know, perhaps recalibrate command would bring it back to life?)
-- 
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